CA2317290A1 - Presser assembly and fixture for fastening presser assembly - Google Patents
Presser assembly and fixture for fastening presser assembly Download PDFInfo
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- CA2317290A1 CA2317290A1 CA002317290A CA2317290A CA2317290A1 CA 2317290 A1 CA2317290 A1 CA 2317290A1 CA 002317290 A CA002317290 A CA 002317290A CA 2317290 A CA2317290 A CA 2317290A CA 2317290 A1 CA2317290 A1 CA 2317290A1
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- Prior art keywords
- assembly
- guide cylinder
- upper male
- die assembly
- stripping die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1818—Means for removing cut-out material or waste by pushing out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D2007/189—Mounting blanking, stripping and break-out tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B50/20—Cutting sheets or blanks
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- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
A presser assembly is provided for holding carton blanks in place on a fema le blanking die during a stripping operation to separate the carton blank from the waste. The assembly includes a male stripping die supporting at least one presser rail, each presser rail having a first end and a second end. A first guide cylinder is secured at th e first end and a second guide cylinder secured at the second end. The first guide cylinder is connected to the first end of the presser rail by way of a connection for flexibly connecting the first guide cylinder to the first end of the presser rail, in a universal-type joint, such that the connected end of the presser rail may move in any direction, independently from the second end. The second guide cylinder is connected to the second end of the presser rail by way of a connection for flexibly connecting the second guide cylinder to the second end of the presser rail, in a universal-type joint, such that such connected end of the presser rail may move in any direction, independently from the first end. The guide cylinders are each attached to the upper male stripping die in a very simple, inexpensive manne r.
Description
(a) TITLE OF THE INVENTION
PRESSER ASSEMBLY AND FIXTURE FOR FASTENING PRESSER
ASSEMBLY
(b) TECHNICAL FIELD TO WHICH THE INVENTION RELATES
This invention relates to a presser assembly for holding carton blanks in their proper orientation on a female blanking die during a blanking operation.
(c) BACKGROUND ART
In the manufacture of cartons, small sheets of material are cut out of larger sheets.
These smaller sheets are known as carton blanks which, in turn, are folded and erected into boxes. The blanks are formed during a process known as a blanking operation.
Typically such machine usually was formed by a series of stations, with the first station being an input station in which the sheets, preprinted if required, were taken one-by-one from the top of a stack in order to be sent onto a feed table, where they were placed in position against frontal and side guides. The sheet was then grasped at its front edge by a series of grippers which were fitted along a crossbar, to lead the sheet into subsequent processing stations.
The sheet was first conveyed into a cutting station of blanks according to a required size, and these blanks were held to the sheet and/or among themselves by nicks, which were arranged along the cut edges. The station usually comprised a platen press having an upper immovable platen on which a plate was provided with a plurality of line-shaped straight and curved die-cutting rules or blades, and a lower movable cooperating platen.
Immediately after cutting, the sheet was carried into a stripping station on a horizontal stripping plate (or female blanking die), which was provided with apertures which were aligned with the parts of the sheet which were to be stripped therefrom. Such stripping plate was generally a frame which included large openings which corresponded in size and in position to the carton blanks which had been previously cut.
Positioned above the horizontal stripping plate was a horizontal upper stripping tool holding device on which strippers and/or pressing items were mounted for movement in a vertical direction. Below the frame was a mechanism for stacking the blanks.
In order to knock the carton blanks from the sheet of material and to hold the blanks, a presser assembly was used. The presser assembly included a support tool having a presser member and a presser rail depending therefrom. The presser rail was biassed away from the support tool. As the support tool was lowered, the presser rail engaged the sheet of material such that the large sheet of material was held between the presser rail and the female blanking die. The support tool continued to be lowered such that the strippers engaged the carton blanks and knocked the blank out of the sheet of material.
The carton blanks fell onto a stacking mechanism wherein the blanks were stacked.
If the presser rail did not adequately hold the carton blank to the female blanking die, the carton blank was not accurately aligned with the stripper and so the mechanism may jam.
In order to hold the carton blank securely, present day presser rails were interconnected to the support tool by a plurality of guide cylinders. Each guide cylinder biassed the presser rail away from the support tool. This gave the presser rail a certain amount of flexibility when engaging the carton blank. However, even with this limited flexibility, present day presser rails have been found to be inadequate.
The upper tool, or male blanking die, generally included pushers or punches which were made of wood or foam, each of which was fastened on the upper tool or male blanking die, above a blank. Such pushers or punches generally have the contour of the border of the blank but of a slightly smaller extent. The upper tool, or male blanking die, generally also had pressing devices, i.e., blocks, which were situated respectively above the intermediate cardboard strips and which were fitted on elastic supports in such a way as to hold each of the strips against its respective bar corresponding to the rack of the lower tool during the blank separating step.
A deficiency of that system was that these pressing devices must be repositioned with every change of the production run with a view to their being adapted to the new requirements, e.g., the type of sheet, the size of the sheet, and the configuration of the parts to be stripped. Especially, the lower tools or female blanking dies had to be constructed in such a way that their structures would not interfere with the free fall of the waste bits after their removal by the stripping tools.
PRESSER ASSEMBLY AND FIXTURE FOR FASTENING PRESSER
ASSEMBLY
(b) TECHNICAL FIELD TO WHICH THE INVENTION RELATES
This invention relates to a presser assembly for holding carton blanks in their proper orientation on a female blanking die during a blanking operation.
(c) BACKGROUND ART
In the manufacture of cartons, small sheets of material are cut out of larger sheets.
These smaller sheets are known as carton blanks which, in turn, are folded and erected into boxes. The blanks are formed during a process known as a blanking operation.
Typically such machine usually was formed by a series of stations, with the first station being an input station in which the sheets, preprinted if required, were taken one-by-one from the top of a stack in order to be sent onto a feed table, where they were placed in position against frontal and side guides. The sheet was then grasped at its front edge by a series of grippers which were fitted along a crossbar, to lead the sheet into subsequent processing stations.
The sheet was first conveyed into a cutting station of blanks according to a required size, and these blanks were held to the sheet and/or among themselves by nicks, which were arranged along the cut edges. The station usually comprised a platen press having an upper immovable platen on which a plate was provided with a plurality of line-shaped straight and curved die-cutting rules or blades, and a lower movable cooperating platen.
Immediately after cutting, the sheet was carried into a stripping station on a horizontal stripping plate (or female blanking die), which was provided with apertures which were aligned with the parts of the sheet which were to be stripped therefrom. Such stripping plate was generally a frame which included large openings which corresponded in size and in position to the carton blanks which had been previously cut.
Positioned above the horizontal stripping plate was a horizontal upper stripping tool holding device on which strippers and/or pressing items were mounted for movement in a vertical direction. Below the frame was a mechanism for stacking the blanks.
In order to knock the carton blanks from the sheet of material and to hold the blanks, a presser assembly was used. The presser assembly included a support tool having a presser member and a presser rail depending therefrom. The presser rail was biassed away from the support tool. As the support tool was lowered, the presser rail engaged the sheet of material such that the large sheet of material was held between the presser rail and the female blanking die. The support tool continued to be lowered such that the strippers engaged the carton blanks and knocked the blank out of the sheet of material.
The carton blanks fell onto a stacking mechanism wherein the blanks were stacked.
If the presser rail did not adequately hold the carton blank to the female blanking die, the carton blank was not accurately aligned with the stripper and so the mechanism may jam.
In order to hold the carton blank securely, present day presser rails were interconnected to the support tool by a plurality of guide cylinders. Each guide cylinder biassed the presser rail away from the support tool. This gave the presser rail a certain amount of flexibility when engaging the carton blank. However, even with this limited flexibility, present day presser rails have been found to be inadequate.
The upper tool, or male blanking die, generally included pushers or punches which were made of wood or foam, each of which was fastened on the upper tool or male blanking die, above a blank. Such pushers or punches generally have the contour of the border of the blank but of a slightly smaller extent. The upper tool, or male blanking die, generally also had pressing devices, i.e., blocks, which were situated respectively above the intermediate cardboard strips and which were fitted on elastic supports in such a way as to hold each of the strips against its respective bar corresponding to the rack of the lower tool during the blank separating step.
A deficiency of that system was that these pressing devices must be repositioned with every change of the production run with a view to their being adapted to the new requirements, e.g., the type of sheet, the size of the sheet, and the configuration of the parts to be stripped. Especially, the lower tools or female blanking dies had to be constructed in such a way that their structures would not interfere with the free fall of the waste bits after their removal by the stripping tools.
2 To accomplish this, the female blanking dies ordinarily consisted of a rectangular frame within which was fitted a grid of transverse members which were made of profile metal bars. The profile of such metal bars generally had a height that was greater than its width to insure a high rigidity in the vertical direction for the tool. The stripping equipment was then arranged, as required, along these transverse members and was held in place by anchoring pieces or parts. In order to enable the user to create a striping tool for any configuration of sheets or board that were to be processed, these machines were supplied with an ample set of traverse members, i.e., an average of, e.g., 40 pieces or members .
As is well-known, the sheet generally contained a great number of bits of waste to be ejected and, consequently, the upper and lower frames were to be equipped with a correspondingly large number of stripping tools, which sometimes may be more than 100 tools.
Devices have been proposed in the past for fastening a stripping tool, a blank separator tool or a similar tool onto an adjustable crossbar of a waste stripping or blank separation station within a sheet processing machine. Such devices generally consisted of a telescopic tool. In a waste stripping station of a cutting press, such tools were fitted on upper and lower frames consisting of movable crossbars in such a way as to be set according to the position of the waste.
The use of such telescopic tools which were fitted onto the male stripping die involved numerous drawbacks as production speeds of the press were further increased.
Generally, these tools had been secured by means of screws to simplify the positioning of the strippers. However, because of the rather large number of strippers which were fitted in the stripper station, the positioning of the stripper remained fastidious, since the technician was compelled to screw in every screw. The rate of tightening of the screws, as involved with the one or the other of the three operations, cannot be determined easily and exactly and absorbed much time, especially so with, e.g., 100 stripping tools.
Another drawback was that the fastening device was not easy to assembly to fit onto a crossbar because of the fact that the clamps were able to turn independently from one another on the cross bar. Thus, they did not always have their supporting surface in parallelism with the guide surfaces of the crossbar, which caused their assembly to be
As is well-known, the sheet generally contained a great number of bits of waste to be ejected and, consequently, the upper and lower frames were to be equipped with a correspondingly large number of stripping tools, which sometimes may be more than 100 tools.
Devices have been proposed in the past for fastening a stripping tool, a blank separator tool or a similar tool onto an adjustable crossbar of a waste stripping or blank separation station within a sheet processing machine. Such devices generally consisted of a telescopic tool. In a waste stripping station of a cutting press, such tools were fitted on upper and lower frames consisting of movable crossbars in such a way as to be set according to the position of the waste.
The use of such telescopic tools which were fitted onto the male stripping die involved numerous drawbacks as production speeds of the press were further increased.
Generally, these tools had been secured by means of screws to simplify the positioning of the strippers. However, because of the rather large number of strippers which were fitted in the stripper station, the positioning of the stripper remained fastidious, since the technician was compelled to screw in every screw. The rate of tightening of the screws, as involved with the one or the other of the three operations, cannot be determined easily and exactly and absorbed much time, especially so with, e.g., 100 stripping tools.
Another drawback was that the fastening device was not easy to assembly to fit onto a crossbar because of the fact that the clamps were able to turn independently from one another on the cross bar. Thus, they did not always have their supporting surface in parallelism with the guide surfaces of the crossbar, which caused their assembly to be
3 awkward. The screw making up the tie bar might be insufficiently screwed-in for locking if one of the clamps was misaligned. In the event a screw was not properly tightened with the clamp properly aligned, the clamp might slip off from the crossbar. The fitting and dismantling operations are almost always to be carried out by a technician by using both hands.
Even after being locked onto the crossbar, the fastening device may become skewed with regard to the lengthwise direction of the crossbar. When the machine operated, the vibrations had a tendency to realign the device which realignment will result in a diminished pre-stressing, and may cause the device to drop, entailing serious damages to the installation.
In addition, the technician may hastily lock a great number of strippers, with excessive tightening of the screw of the fastening device and, therefore, cause the breakage of certain components. To avoid this hazard, the tightening strength applied must, therefore, be checked.
Many patents have been issued which were alleged to provide for the proper alignment of the blank with the stripping tools. Among the patents are those in the following list:
U.S. Patent No. Issued Date Issued To 2,548,370 April 10, 1951 E. L. Hedstrom et al.
2,845011 July 29, 1958 H. K. Schilling 3,249,272 May 3, 1996 R. Scarpa 3,786,731 Jan. 22, 1974 J. Bobst et al.
Even after being locked onto the crossbar, the fastening device may become skewed with regard to the lengthwise direction of the crossbar. When the machine operated, the vibrations had a tendency to realign the device which realignment will result in a diminished pre-stressing, and may cause the device to drop, entailing serious damages to the installation.
In addition, the technician may hastily lock a great number of strippers, with excessive tightening of the screw of the fastening device and, therefore, cause the breakage of certain components. To avoid this hazard, the tightening strength applied must, therefore, be checked.
Many patents have been issued which were alleged to provide for the proper alignment of the blank with the stripping tools. Among the patents are those in the following list:
U.S. Patent No. Issued Date Issued To 2,548,370 April 10, 1951 E. L. Hedstrom et al.
2,845011 July 29, 1958 H. K. Schilling 3,249,272 May 3, 1996 R. Scarpa 3,786,731 Jan. 22, 1974 J. Bobst et al.
4,015,495 April S, 1977 M. Yerly 4,041,847 Aug. 16, 1977 E. M. Spengler 4,452,595 June 5, 1984 R. J. Huff
5,087,236 Feb. 11, 1992 H. Morimoto 5,375,751 Dec. 27, 1994 J. Makinen 5,474,219 Dec. 12, 1995 H. Mano 5,605,527 Feb. 25, 1997 J. L. Gillieron 5,735,442 Apr. 7, 1998 D. Emrich 5,810,233 Sept. 22, 1998 C. Varidel 5,865,358 Feb. 2, 1999 J. M. V. Fernandez 5,893,825 Apr. 13, 1999 J-C Rebeaud Other patents related to the securement of a crossbar which served to hold the blanks in position during the stripping operation. Among such patents are the following.
U.S. Patent No. 4,248,370, disclosed a fastening device for securing a tool on a crossbar of a waste stripping or blank separating station within a sheet processing machine.
The device included a rod-shaped tie bar which was provided with a headed end which received a freely-shifting support for the tool. First and second guides were each provided, at least with one supporting surface slanting with regard to the axis of the tie bar and were constructed to act jointly with two corresponding guide surfaces on a crossbar of the station. Tightening means were provided on one end of the tie bar and were designed to.
push the sliding components toward the headed end of the tie bar in order to bring about a variation in their contact pressure. This was said to enable the execution of three operations, which included fitting and dismantling the tool, shifting the tool, and locking of various components with regard to one another on the crossbar.
U.S. Patent No. 4,913,016, issued April 3, 1990, to Peter Frei, assigned to Bobst SA, provided a waste stripping tool for use in a machine which was used for cutting sheet-like items. Such waste stripping tool included a grid which was formed of crossbar members consisting of a crossbar assembly of two members which were held side-by-side by a coupler. The assembly included a strap, which had two jaws having two triangular profiled teeth which were engaged in grooves in each of the crossbar members, and threaded arrangement for causing a clamping of the jaws onto the members to hold them in a side-by-side relationship. Each crossbar was an adjustable crossbar assembly having two ends, including two crossbar members which were linked together lengthwise side-by-side in such a way that the length of the crossbar assembly corresponded to the distance separating the two opposite frame members between which it was secured. The assembly, at each end, had means for securing the assembly to the frame members.
U.S. Patent No. 5,064,110, issued November 12, 1991, to Marcel Yerly, assigned to Bobst SA, provided a fixture for fastening a stripping tool or a blank separating tool.
The fastening device included a tie bar which was provided with a headed end which received a support for the tool part. A pair of clamping jaws, were each provided with a supporting surface which was designed to enter in contact with the crossbar of the stripping station and to have additional supporting surfaces designed to enter into contact with one another. The second end of the tie bars carried a tightening arrangement which were said to provide three positions. Such three positions included a substantial release of pressure on the jaws to enable fixing and dismantling of the tool, an intermediate amount of pressure on the jaws to allow shifting of the arrangement along the crossbar, and a third amount of pressure which provided a tightening or locking of the tool in a given position on the crossbar.
U.S. Patent No. 5,065,926, issued November 19,1991, to Marcel Yerly, assigned to Bobst SA, provided a telescopic tool for stripping waste within a sheet processing machine. The telescopic tool included a hollow cylindrical body which received a pin having a portion extending out of a bore of the body with a tip for engaging the waste material. The tip was formed of a deformable material, while the remaining portion of the pin was of a rigid, hardened material. The pin had a collar which was received in the interior of the body which engaged an internal shoulder. To absorb noise, the pin was provided with an elastic element adjacent to the collar to be interposed between the collar and shoulder.
U.S. Patent No. 5,529,565, issued June 25, 1996, to Frank E. Oetlinger, provided a presser assembly. The presser assembly included a presser rail having a first end which was mounted to a first guide cylinder and a second end which was mounted to a second guide cylinder. Each end of the presser rail was vertically-movable independent of the opposite end. This was said to prevent jamming of the presser assembly during the blanking operation.
U.S. Patent No. 5,599,269, issued February 4, 1997, to Frank E Oetlinger, also provided a presser assembly for supporting carton blanking scrap. The presser assembly included a hollow housing defining an open top and an open bottom. A
longitudinally-extending stem was slidably-received within the housing for reciprocal movement therein, the stem having an upper end projecting from the open top and a lower end projecting from the open bottom. A presser rail was also provided, along with connector means for connecting the lower end of the stem to the presser rails. Bias means were provided for
U.S. Patent No. 4,248,370, disclosed a fastening device for securing a tool on a crossbar of a waste stripping or blank separating station within a sheet processing machine.
The device included a rod-shaped tie bar which was provided with a headed end which received a freely-shifting support for the tool. First and second guides were each provided, at least with one supporting surface slanting with regard to the axis of the tie bar and were constructed to act jointly with two corresponding guide surfaces on a crossbar of the station. Tightening means were provided on one end of the tie bar and were designed to.
push the sliding components toward the headed end of the tie bar in order to bring about a variation in their contact pressure. This was said to enable the execution of three operations, which included fitting and dismantling the tool, shifting the tool, and locking of various components with regard to one another on the crossbar.
U.S. Patent No. 4,913,016, issued April 3, 1990, to Peter Frei, assigned to Bobst SA, provided a waste stripping tool for use in a machine which was used for cutting sheet-like items. Such waste stripping tool included a grid which was formed of crossbar members consisting of a crossbar assembly of two members which were held side-by-side by a coupler. The assembly included a strap, which had two jaws having two triangular profiled teeth which were engaged in grooves in each of the crossbar members, and threaded arrangement for causing a clamping of the jaws onto the members to hold them in a side-by-side relationship. Each crossbar was an adjustable crossbar assembly having two ends, including two crossbar members which were linked together lengthwise side-by-side in such a way that the length of the crossbar assembly corresponded to the distance separating the two opposite frame members between which it was secured. The assembly, at each end, had means for securing the assembly to the frame members.
U.S. Patent No. 5,064,110, issued November 12, 1991, to Marcel Yerly, assigned to Bobst SA, provided a fixture for fastening a stripping tool or a blank separating tool.
The fastening device included a tie bar which was provided with a headed end which received a support for the tool part. A pair of clamping jaws, were each provided with a supporting surface which was designed to enter in contact with the crossbar of the stripping station and to have additional supporting surfaces designed to enter into contact with one another. The second end of the tie bars carried a tightening arrangement which were said to provide three positions. Such three positions included a substantial release of pressure on the jaws to enable fixing and dismantling of the tool, an intermediate amount of pressure on the jaws to allow shifting of the arrangement along the crossbar, and a third amount of pressure which provided a tightening or locking of the tool in a given position on the crossbar.
U.S. Patent No. 5,065,926, issued November 19,1991, to Marcel Yerly, assigned to Bobst SA, provided a telescopic tool for stripping waste within a sheet processing machine. The telescopic tool included a hollow cylindrical body which received a pin having a portion extending out of a bore of the body with a tip for engaging the waste material. The tip was formed of a deformable material, while the remaining portion of the pin was of a rigid, hardened material. The pin had a collar which was received in the interior of the body which engaged an internal shoulder. To absorb noise, the pin was provided with an elastic element adjacent to the collar to be interposed between the collar and shoulder.
U.S. Patent No. 5,529,565, issued June 25, 1996, to Frank E. Oetlinger, provided a presser assembly. The presser assembly included a presser rail having a first end which was mounted to a first guide cylinder and a second end which was mounted to a second guide cylinder. Each end of the presser rail was vertically-movable independent of the opposite end. This was said to prevent jamming of the presser assembly during the blanking operation.
U.S. Patent No. 5,599,269, issued February 4, 1997, to Frank E Oetlinger, also provided a presser assembly for supporting carton blanking scrap. The presser assembly included a hollow housing defining an open top and an open bottom. A
longitudinally-extending stem was slidably-received within the housing for reciprocal movement therein, the stem having an upper end projecting from the open top and a lower end projecting from the open bottom. A presser rail was also provided, along with connector means for connecting the lower end of the stem to the presser rails. Bias means were provided for
6 biassing the presser rail away from the housing. Stop means at the upper end of the stem were engageable with the housing for limiting the movement of the rail away from the housing. A guide member surrounded the stem and was received within the open bottom of the housing in telescoping relation with the housing for guiding the presser rail during its vertical reciprocating movement. An anti-rotation mechanism was included for preventing relative rotation between the presser rail and the housing.
U.S. Patent No. 5,766,123, issued June 16, 1998, to Frank E. Oetlinger, also provided a presser assembly for supporting carton blanking scrap. That presser assembly included a hollow housing including a cavity which was formed therethrough defining an open top and an open bottom. A longitudinally-extending stem was slidably received within the cavity for reciprocal movement therein. The stem had an upper end projecting from the open top and a lower end projecting from the open bottom. A presser rail was provided, along with connector means, for connecting the lower end of the stem to the presser rail. The connector means included a universal coupling to provide a flexible connection between the presser rail and the stem and a clevis. The universal coupling included spring means for biassing the rail away from the clevis. Bias means, which were provided for biassing the presser rail away from the housing stop means at the upper end of the stem, were engageable with the housing for limiting the movement of the rail away from the housing. A guide member surrounding the stem and was received within the open bottom of the cavity in telescoping relation with the housing for guiding the presser rail during its vertical reciprocating movement.
(d) DESCRIPTION OF THE INVENTION
An object of one aspect of this invention is to provide a presser assembly having an easily-assimilable presser rail for securely holding the selvedge or perimetral waste material of a carton blank to a female stripping die during a stripping operation.
An object of a second aspect of this invention is to provide such a presser assembly having a presser rail which is durable and maintains its shape over an extended period of tune.
An object of a third aspect of this invention is to provide such a presser assembly which is easy to mount to the upper male stripping die of a stripping machine.
U.S. Patent No. 5,766,123, issued June 16, 1998, to Frank E. Oetlinger, also provided a presser assembly for supporting carton blanking scrap. That presser assembly included a hollow housing including a cavity which was formed therethrough defining an open top and an open bottom. A longitudinally-extending stem was slidably received within the cavity for reciprocal movement therein. The stem had an upper end projecting from the open top and a lower end projecting from the open bottom. A presser rail was provided, along with connector means, for connecting the lower end of the stem to the presser rail. The connector means included a universal coupling to provide a flexible connection between the presser rail and the stem and a clevis. The universal coupling included spring means for biassing the rail away from the clevis. Bias means, which were provided for biassing the presser rail away from the housing stop means at the upper end of the stem, were engageable with the housing for limiting the movement of the rail away from the housing. A guide member surrounding the stem and was received within the open bottom of the cavity in telescoping relation with the housing for guiding the presser rail during its vertical reciprocating movement.
(d) DESCRIPTION OF THE INVENTION
An object of one aspect of this invention is to provide a presser assembly having an easily-assimilable presser rail for securely holding the selvedge or perimetral waste material of a carton blank to a female stripping die during a stripping operation.
An object of a second aspect of this invention is to provide such a presser assembly having a presser rail which is durable and maintains its shape over an extended period of tune.
An object of a third aspect of this invention is to provide such a presser assembly which is easy to mount to the upper male stripping die of a stripping machine.
7 An object of a fourth aspect of this invention is to provide such a presser assembly which can be easily dimensioned, as required by the size of the carton blanks to be stripped, and ensures that the same rate of rigidity is present while involving a lesser investment for materials.
An object of a fifrh aspect of this invention is to provide such a presser assembly for holding the selvedge or perimetral waste material of the carton blanks in fixed position during the stripping of the carton blank.
A first broad aspect of the present invention provides an improvement in a presser assembly for attachment to an upper male stripping die assembly for temporarily holding a carton blank in place on a female blanking die during a stripping operation.
The improvement includes a presser rail having a first end and a second end, a first guide cylinder and a second guide cylinder. A first connection assembly of a universal joint-type is provided for flexibly-connecting the first guide cylinder to the first end of the presser rail, such that such first connected end of the presser rail may move in any direction independently from the second end. A second connection assembly of a universal joint-type is provided for flexibly connecting the second guide cylinder to the end of the second presser rail, such that such second connected end of the presser rail may move in any direction independently from the first end.
A second broad aspect of this invention provides a presser rail assembly for temporarily holding carton blanks in place on a female stripping die during a stripping operation by an upper male stripping die. The presser rail assembly includes an upper male blanking die assembly having at least one pair of two spaced-apart circular apertures and a presser rail having a first end and a second end. A first guide cylinder is flexibly connected to the first end of the presser rail, such that such first connected end of the presser rail may move in any direction independently from the second end. A second guide cylinder is flexibly connected to the presser rail, such that such second connected end of the presser rail may move in any direction independently from the first end. Each guide cylinder is secured to the upper male stripping die by the combination of each of the guide cylinders extending through an associated circular aperture in the upper male stripping die assembly, with a lower stop ring of the guide cylinder abutting the lower surface of the upper male stripping die assembly, and with a projecting turret portion of the guide cylinder being
An object of a fifrh aspect of this invention is to provide such a presser assembly for holding the selvedge or perimetral waste material of the carton blanks in fixed position during the stripping of the carton blank.
A first broad aspect of the present invention provides an improvement in a presser assembly for attachment to an upper male stripping die assembly for temporarily holding a carton blank in place on a female blanking die during a stripping operation.
The improvement includes a presser rail having a first end and a second end, a first guide cylinder and a second guide cylinder. A first connection assembly of a universal joint-type is provided for flexibly-connecting the first guide cylinder to the first end of the presser rail, such that such first connected end of the presser rail may move in any direction independently from the second end. A second connection assembly of a universal joint-type is provided for flexibly connecting the second guide cylinder to the end of the second presser rail, such that such second connected end of the presser rail may move in any direction independently from the first end.
A second broad aspect of this invention provides a presser rail assembly for temporarily holding carton blanks in place on a female stripping die during a stripping operation by an upper male stripping die. The presser rail assembly includes an upper male blanking die assembly having at least one pair of two spaced-apart circular apertures and a presser rail having a first end and a second end. A first guide cylinder is flexibly connected to the first end of the presser rail, such that such first connected end of the presser rail may move in any direction independently from the second end. A second guide cylinder is flexibly connected to the presser rail, such that such second connected end of the presser rail may move in any direction independently from the first end. Each guide cylinder is secured to the upper male stripping die by the combination of each of the guide cylinders extending through an associated circular aperture in the upper male stripping die assembly, with a lower stop ring of the guide cylinder abutting the lower surface of the upper male stripping die assembly, and with a projecting turret portion of the guide cylinder being
8 secured against the upper surface of the upper male stripping die by a suitable locking member.
By a first variant of this second broad aspect of this invention, such suitable locking member comprises an upper externally-threaded turret portion which projects above the top surface of the upper male stripping die assembly and is secured thereto by an internally-threaded locking nut. By a first variation thereof, the internally-threaded locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and a pin extends through a selected notch into a selected hole thereby, to prevent the internally-threaded locking nut from accidentally unscrewing.
By a second variant of this second broad aspect of this invention, such suitable locking means comprises a lower stop ring which abuts the bottom surface of the upper male stripping die assembly and an upper turret portion which projects above the top of the upper male stripping die assembly and is secured thereto by an encircling O-ring.
The present invention, in a third broad aspect, provides an assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation. The assembly includes an upper male stripping die assembly. The upper male stripping die assembly includes at least one pair of longitudinally-spaced-apart, circular apertures, and a presser assembly. The presser assembly includes a first guide cylinder, the first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, the first guide cylinder also including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end. The first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by a locking member. The presser assembly also includes a second guide cylinder, the second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, the second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-
By a first variant of this second broad aspect of this invention, such suitable locking member comprises an upper externally-threaded turret portion which projects above the top surface of the upper male stripping die assembly and is secured thereto by an internally-threaded locking nut. By a first variation thereof, the internally-threaded locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and a pin extends through a selected notch into a selected hole thereby, to prevent the internally-threaded locking nut from accidentally unscrewing.
By a second variant of this second broad aspect of this invention, such suitable locking means comprises a lower stop ring which abuts the bottom surface of the upper male stripping die assembly and an upper turret portion which projects above the top of the upper male stripping die assembly and is secured thereto by an encircling O-ring.
The present invention, in a third broad aspect, provides an assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation. The assembly includes an upper male stripping die assembly. The upper male stripping die assembly includes at least one pair of longitudinally-spaced-apart, circular apertures, and a presser assembly. The presser assembly includes a first guide cylinder, the first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, the first guide cylinder also including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end. The first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by a locking member. The presser assembly also includes a second guide cylinder, the second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, the second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-
9 shaped end. The second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding the second circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by a locking member. The presser assembly also includes a presser rail having a first end and a second end. The first end of the presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot. The second end of the presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot. The first end of the presser rail is connected to the first guide cylinder by the ball-shaped end of the stem of the first guide cylinder being slidably retained in the first, longitudinally-extending, cylindrical channel, with the stem of the first guide cylinder being slidable within the first longitudinally-extending slot such that the connected first end of the presser rail may move in any direction independently from the second end. The second end of the presser rail is connected to the second guide cylinder by the ball-shaped end of the stem of the second guide cylinder being slidably retained in the second longitudinally-extending cylindrical channel, with the stem of the second guide cylinder being slidable within the second longitudinally-extending slot, such that the connected second end of the presser rail may move in any direction independently from the second end.
By a first variant of this third broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the externally-threaded intermediate turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut, and the second guide cylinder is secured to the upper support member by extending through an associated second circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly by the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut. By a first variation thereof the internally-threaded locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and wherein a pin extends through a selected notch into a selected hole, thereby to prevent accidental unscrewing of the locking nut.
By a second variant of this third broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an encircling O-ring, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an encircling O-ring.
It is not essential for the turret of the second guide cylinder to be secured to the upper male stripping die assembly in the same manner as the turret of the first guide cylinder is secured to the upper male stripping die assembly.
By a third variant of this third broad aspect of this invention, and/or the above variants thereof, each of the first guide cylinder and the second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly. By a first variation thereof, there are two the encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of the upper male stripping die assembly.
By a fourth variant of the above broad aspects of this invention, the presser rail includes a fixed lower resilient pad.
By a fifth variant of the above broad aspects of this invention, the presser rail includes a fixed resilient pad and a replaceable terminal resilient pad which is spaced longitudinally-apart from the fixed terminal resilient pad. By a first variation thereof, the assembly includes a metallic pin secured to the presser rail and having a downwardly projecting pointed end. By a second variation thereof, the terminal resilient pad comprises two transversely spaced-apart pads. By a third variation thereof, the assembly includes a metallic element disposed between the transversely spaced-apart pads, the metallic element including a downwardly projecting pointed end.
By a sixth variant of the above broad aspects of this invention, the inner housing is reciprocally movable within the outer housing. By a first variation thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member. By a ninth variation thereof, the guide cylinder includes a piston rod, the lower end of which is secured to the inner housing.
The present invention in a fourth aspect, provides a stripper assembly comprising a stripper assembly including an upper male blanking die assembly. The upper male stripping die assembly includes at least one pair of longitudinally-spaced-apart circular apertures, and at least one depending die having a shape coincident with the outline of a carton blank to be stripped. The lower apertured female stripping die is provided for supporting a carton blank to be stripped, the lower stripping die including a central area having an aperture of a shape coincident with the outline of a carton blank to be stripped, and peripheral support areas. The upper male stripping die assembly is movable towards and away from the female stripping die. A presser assembly is provided. The presser assembly includes a first guide cylinder, the first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret. The first guide cylinder includes an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end. The first guide cylinder is secured to the upper male blanking die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by a locking member. The presser assembly includes a second guide cylinder, the second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret. The second guide cylinder includes an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, the second guide cylinder being secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die, the intermediate turret being secured against the upper surface of the upper male stripping die by a locking member. The presser rail has a first end and a second end. The first end of the presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot, and the second end of the presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot. The first end of the presser rail is connected to the first guide cylinder by the ball-shaped end of the stem of the first guide cylinder being slidably retained in the first, longitudinally-extending, cylindrical channel, with the stem of the first guide cylinder being slidable within the first longitudinally-extending slot such that the connected first end of the presser rail may move in any direction independently from the second end, and the second end of the presser rail being connected to the second guide cylinder by the ball-shaped end of the stem of the second guide cylinder being slidably retained in the second longitudinally-extending cylindrical channel, with the stem of the second guide cylinder being slidable within the second longitudinally-extending slot, such that the connected second end of the presser rail may move in any direction independently from the second end. In use, the presser rail is uniformly pressed against the selvedge or waste portions of the carton blank for temporarily holding the selvedge or waste portions of the carbon blank on the female stripping die during a stripping operation, and to allow the carton blank to be forced through the aperture in the female stripping die. .
By a first variant of this fourth broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate externally-threaded turret being secured against the upper surface of the upper male stripping die by an internally-threaded locking nut, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate externally-threaded turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut. By a first variation thereof, the locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and a pin extends through a selected notch into a selected hole, thereby to prevent accidental unscrewing of the internally-threaded locking nut..
By a second variant of this fourth broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by an encircling O-ring, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by an encircling O-ring.
By a third variant of this fourth broad aspect of this invention, and or the above variants thereof, the presser rail includes a resilient pad for engaging the waste or selvedge of the carton blank.
By a fourth variant of this fourth broad aspect of this invention, and or the above variants thereof, each of the first guide cylinder and the second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly. By a first variation thereof, there are two the encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of the upper male stripping die assembly.
By a fifth variant of this fourth broad aspect of this invention, the presser rail includes a coextensive fixed resilient lower pad.
By a sixth variant of this fourth broad aspect of this invention, and/or the above variants thereof, the presser rail includes a fixed resilient pad and a replaceable terminal resilient pad which is spaced longitudinally-apart from the fixed terminal resilient pad. By a first variation thereof, a metallic pin secured to the presser rail and has a downwardly projecting painted end. By a second variation thereof, the terminal resilient pad comprises two transversely spaced-apart pads. By a third variation thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member.
By a seventh variant of this fourth broad aspect of this invention, and or the above variants thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member.
By an eighth variant of this fourth broad aspect of this invention, and or the above variants thereof, the stripper assembly includes a stop member for limiting movement of the presser rail away from the outer housing. By a first variation thereof, the stripper assembly includes a cushion which is disposed between the stop member and the outer housing. By a second variation thereof, the cushion comprises a washer which is composed of a resilient material.
(e) DESCRIPTION OF THE FIGURES
In the accompanying drawings:
FIG. lA is a side elevational view of a presser assembly of an embodiment of an aspect of this invention including an upper male blanking die assembly which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton resting thereon, in its unpressed orientation.
FIG. 1B is a side elevational view of the presser bar assembly of an embodiment of an aspect of this invention shown in FIG. lA, including an upper male blanking die which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton having been pressed through the lower female blanking die.
FIG. 2 is a perspective view of a presser assembly of an embodiment of an aspect of this invention including an upper male blanking die which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton having been pressed through the lower female blanking die.
FIG. 3 is an enlarged central cross-sectional side view of the presser assembly of an embodiment of an aspect of this invention, also showing the attachment of the guide cylinder to the upper male blanking die assembly, (the male blanking die per se being omitted for clarity) and the attachment of the guide cylinder to the presser bar.
FIG. 4 is a detail of the attachment of the guide cylinder to the presser bar.
FIG. 5 is a perspective view, partially broken away, of the attachment of a guide cylinder to the presser bar.
FIG. 6 is a perspective view, partially broken away, showing one embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly.
FIG. 7 is a perspective view, partially broken away, showing a second embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly.
FIGS. 8 to 11 are views showing a third embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly, in which FIG. 8 is a top plan view of the area of the upper male blanking die assembly where the guide cylinder is to be attached, FIG. 9 is a top plan view of a locking member, FIG. 10 is a top plan view of the connected elements, and FIG. 11 is a perspective view showing the manner of connecting the guide cylinder to the upper male blanking die assembly.
FIG. 12 is a vertical section through one embodiment of the lower end of an assembled guide cylinder/presser bar.
FIG. 13 is a composite, exploded, perspective view showing the manner of assembly of the embodiment shown in FIG. 12.
FIG. 14 is a section through another embodiment of the lower end of an assembled guide cylinder/presser bar.
FIG. 15 is a bottom plan view of the assembly shown in FIG. 14.
(fj AT LEAST ONE MODE FOR CARRYING OUT THE INVENTION
The present invention, in its broad aspects, provides an improvement over the three embodiments of the connection of the guide cylinder to the presser rail as described in the three above-identified Oetlinger U.S. patents. Thus, the present invention, in its broad aspects, provides a novel attachment system of a cylindrical guide member to an upper support (i.e., a male blanking die assembly) and a novel attachment system of the cylindrical guide member to a presser rail. These improvements will be described in more detail in FIGS. 3 to 6.
Referring more generally to FIG. lA, FIG. 1B and FIG. 2, a presser assembly in accordance with one embodiment of an aspect of the present invention is generally designated by the reference number 100. The presser assembly 100 includes presser rail 103 which is moved vertically during a blanking or stripping operation. The male pressing die to strip the carton blanks away from the selvedge or wastes shown as 108 herein, for clarity. The upper male blanking die assembly101 is an elongated member having a first, upper face 110 and a second, lower face 111. The male pressing die 108 is secured to lower face 111. In addition, each face 110, 111, is interconnected by at least one pair of spaced-apart circular apertures extending through the upper male blanking die assembly 101. In practice there would generally be, e.g., over twenty of such pairs of apertures, to enable a like number of presser bars. These apertures are provided in the upper male blanking die assembly 101 to facilitate the mounting of a cylindrical guide cylinder 105 to the male blanking die assembly 101, in a manner to be described hereinafter.
FIG. lA shows the stripping machine before the stripping operation, with the carton blank 107, including its soon-to-become waste or selvedge 109, resting on the lower, female blanking die 102, and with the male blanking die 108 immediately above the carton blank 107.
FIG. 1B shows the stripping machine after the stripping operation, with the male blanking die 108 having pushed the carton blank 107 through the opening in the female blanking die 102, and with the presser bar 103 holding the waste or selvedge 109 onto the perimeter of the female blanking die 102.
FIG. 2 shows, in perspective, a schematic version of a stripping machine. The stripping machine includes an upper male stripping die assembly 101, to the bottom 111 of which the male stripping die 108 is secured, and a lower female stripping die 103. As is conventional, the upper male stripping die assembly 101 thus includes a depending, profiled male stripping die 108 of the same shape as the outline of the carton blank 107, and the lower female stripping die 103 has a carton-blank aperture 114 therein which is of the same shape as the outline of the carton blank 107. While only one carton blank 107 is shown, whereby there is one profiled male stripping die 108 and one carton-blank aperture 114, in commercial practice, there will be a plurality, e.g., twenty or more, blanks 107.
Accordingly, the upper male stripping die assembly 101 would generally include a plurality of profiled male stripping dies 108 coinciding with the number of blanks 107.
Similarly, the lower female blanking die 102 includes a like plurality of carton-blank apertures 114, in the form of a grid of a plurality of mutually-transverse grid rails to provide openings for the carton blanks to be discharged therethrough. The conventional grid rails (not shown) and the periphery of the die 102 support the waste or selvedge, e.g., of the carton blank 107 to be stripped away.
The presser assembly 100 includes a presser bar 103 which is secured to a pair of guide cylinders only one of which guide cylinder 105, being shown. The presser bar 103 is secured to the guide cylinder 105 in a variety of manners to be described in greater detail hereinafter. The guide cylinder105 is secured to the upper male stripping die assembly 101 in a variety of manners to be described in greater detail hereinafter. The stripped carton blank 107 is shown below the stripping machine.
As seen in FIG. 3, FIG. 4, and FIG. 5, the cylindrical guide cylinder 105 includes a housing for mounting to the male blanking die assembly 101. The housing includes a tubular body portion and a cylindrical stop ring portion extending outwardly therefrom.
More particularly, the cylindrical guide cylinder includes an outer housing 350 including a central bore 352. An inner housing 329 is longitudinally slidably disposed within central bore 252. A piston rod 354 extends through the central bore 356 of the inner housing member 329 and is threadedly secured in an internally threaded bore 358 thereof by threaded end 360. The other end of piston rod 354 extends through a bushing 362 at the upper end 364 of the outer housing 350. A coil spring 366 encircles the piston rod 354 and rests with its lower end at the base of bore 356, and with its upper end abutting the disc portion 368 of the bushing 362. Bushing 362 is held in place by lock ring 370.
The lower end of the outer housing 350 is provided with a terminal stop ring and with a pair of suitably spaced-apart encircling grooves 380, 382 within each one of which is secured an O-ring 384,388. Immediately above the upper O-ring 384, the housing 350 is provided with an externally threaded turret 388. These external threads are adapted to cooperate with an internally-threaded bearing nut or locking member 390 to hold each cylindrical guide cylinder 105 to the male stripping die assembly 101, in a manner to be described hereinafter.
As previously described, the lower end of inner housing 329 has an integral depending stem 328 which terminates in a knob 330.
In the assembly of the cylindrical guide cylinder105, the piston rod 354 is extended through bore 356 and its lower threaded end 360 is threaded into the internally-threaded well at lower end of the inner housing 329, with the piston rod being encircled by the coil spring 366. The so-connected inner housing 329 is slidably installed into the bore 352 of the outer housing 350 until the spring 366 abuts the lower end of upper guide bushing 362.
The amount of the biassing between the outer housing 350 and the inner housing 329 is adjusted and the upper end of the piston rod 354 is secured in place. This securing in place is achieved by means of a jam nut 370 which is secured in place by a nylon lockout 372, with a rubber shock absorber 374 disposed between the upper end of the outer housing 350 and the jam nut 370.
Each cylindrical guide cylinder 145 is secured to the upper male stripping die assembly 101 in the following manner, referring to FIG. 3 and FIG. 6..
As previously described, the male stripping die assembly 101 is provided with a circular hole 314 therethrough for each cylindrical guide cylinder 105. The cylindrical guide cylinder 105, which has been assembled as described above, is inserted through the circular hole 314 so that the stop ring 378 abuts the lower face 111 of the upper male stripping die assembly 101. The two spaced-apart O-rings 384,386 seal against the inner periphery of the circular hole 314, with the externally threaded turret 388 projecting above the top surface 110 of the upper male stripping die assembly 101. Then the bearing nut 390 is threaded into the externally threaded turret 388 and is threaded until its lower surface abuts the upper surface 110 of the upper male stripping die assembly 101 to secure the cylindrical guide cylinder 105 to the upper male stripping die 101, with the stem 328 and its terminal knob 330 extending below the male stripping die 101.
The terminal knob 330 of the stem 328 is slidably fitted into the cylindrical, longitudinally-extending channel 334 of the presser rail 103 and can slide therein by way of the slot 335. The combination of the knob 330 and the channel 334 and slot 335, provides a universal joint-type connection, allowing unrestricted rotational movement of the presser rail 103 with respect to the cylindrical guide members 105.
The presser rail 103 includes an upper presser bar 331 (within which are channel 334 and slot 335 and a lower resilient rubber-like rail 332 which is secured to the bottom 333 of upper presser bar 331.
Because of these universal joint-type interconnections between the cylindrical guide members 105 and the presser rail 103 as described above, the ends of the presser rail 103 may move in all directions, each in unison or independently of the opposite end of the presser rail 110. This, in turn, increases the flexibility of the presser rail 103.
FIG. 7 shows a second embodiment of an aspect of the connection of the cylindrical guide member 105 to the upper male stripping die assembly 101 in the presser assembly of an aspect of the present invention. This is constituted by a modification of the cylindrical guide cylinder, now given reference numeral 705. Cylindrical guide cylinder 705 includes most parts which are identical with cylindrical guide cylinder 105, and those parts are provided with the same reference numbers. However, in this embodiment, turret 788 is not provided with the external threads, but is, instead provided with a snap-ring interlock 789.
The connection of cylindrical guide cylinder 705 to upper male stripping die 101 is the same as previously described, with the following change. When the turret 758 having the snap ring interlock 789 extends above upper surface 110 of upper male stripping die assembly 101, the snap ring 790 is engaged with the snap ring interlock 789 on the turret 788 and is urged downwardly until it abuts the upper surface 110 of the upper male stripping die 101, to secure the cylindrical guide cylinder 705 to the upper male stripping die 101.
FIG. 8, FIG. 9, FIG. 10 and FIG. 11 show another embodiment of the securement of the cylindrical guide cylinder to the upper male stripping die assembly 101. As seen in FIG. 8, the peripheral area around an aperture 814 is provided with a plurality, namely nine, small drill holes 815. The locking member 890 is a ring-like member 891 which is provided with internal threads 891 (See FIG. 11) and four equi-spaced-apart notches 892.
As seen in FIG. 11, the locking member 890 has been threaded by threads 891 into the threads of turret 388, until one of the notches 892 is lined up around one of the small drill holes 815. A pin 893 is inserted through that drill hole 815 to prevent locking member 890 from accidentally unscrewing.
FIG. 12 and FIG. 13 show another embodiment of the lower end of the cylindrical guide/presser rail 105. In this embodiment, the presser rail 1203 includes an upper member 1231, a major lower fixed resilient material pad 1232, and a replaceable, resilient material split tip 1233. In the mid-area between split tips 1233 is a rigid, e.g., steel, member 1234, which is provided with a projecting tip 1235. In all other aspects, the guide cylinder 808 is attached to the presser rail 805 in the above-described manner. When in use, the projecting tip 1235 of the presser bar 1203 slightly impales the waste or selvedge 109, better to secure the carton blank in place on the female blanking die 102.
FIG. 14 and FIG. 15 shows yet still another embodiment of the lower end of the cylindrical guide/presser rail 105. In this embodiment, the presser rail 1403 is provided with a depending pin 1406, as well as a major resilient material pad 1432 and a terminal resilient material pad 1432. The pin 1406 includes a head 1407 and a shank 1432 as well as a pointed tip 1409. Head 1407 is secured within countersunk well 1410 and the shank 1408 is threaded into internally threaded aperture 1411. When in use, the pointed tip 1409 of the presser bar 1403 impales the waste or selvedge 109, better to secure the carton blank in place on the female blanking die.
In operation, the upper male blanking die assembly, with its attached depending, blanking die and its attached, depending presser bar is urged downwardly, in the usual manner, towards the carton blanks which are supported in the lower female die plate. The presser bars first engage the soon-to-be waste or selvedge surrounding the carton blank to hold it firmly against the lower female blanking die. The upper male blanking die then continues in its downward motion to cause the male blanking die to punch the carton blank through the opening in the lower female blanking die, and to deposit the carton blank on a suitable platform. The waste or selvedge remains held to the lower female blanking die.
The upper male blanking die is then moved upwardly, thereby simultaneously releasing the gripping of the presser bars on the waste or selvedge. Conventional gripping fingers then grip the waste or selvedge and discard it as waste, allowing another carton blank to be placed in the lower female blanking die.
The above procedure is then repeated.
As a result of these specific universal joint-type interconnections as described above, connection between the cylindrical guide members and the presser rail is made easy.
Due to the various degrees of motion of these universal-type interconnection means, the cylindrical guide member and the presser rail need not be accurately aligned for the connection to be made. Moreover, the presser rail may move vertically upwardly and downwardly even if the movement is not 100 % vertical without impediment, since the ends of the presser rail are independently movable. Contact of the presser rail with the carton blank need not be simultaneous for the length of the presser rail. As a result, the waste or selvedge of the carton blank is more adequately supported. This, in turn, prevents jamming the blanking operating machinery.
As a result of the cooperation between the various embodiments of the turret and the cooperating snap ring or bearing nut, the cylinder assembly can very easily be attached to the upper male blanking die assembly. In addition, the O-rings assure a positive gripping of the guide cylinder within the hole in the upper male blanking die assembly.
Thus, since each guide cylinder need not be screwed onto the upper male blanking die, as in the prior art, the connection of the guide cylinder to the upper blanking die is greatly facilitated.
By a first variant of this third broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the externally-threaded intermediate turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut, and the second guide cylinder is secured to the upper support member by extending through an associated second circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly by the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut. By a first variation thereof the internally-threaded locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and wherein a pin extends through a selected notch into a selected hole, thereby to prevent accidental unscrewing of the locking nut.
By a second variant of this third broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an encircling O-ring, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die assembly by an encircling O-ring.
It is not essential for the turret of the second guide cylinder to be secured to the upper male stripping die assembly in the same manner as the turret of the first guide cylinder is secured to the upper male stripping die assembly.
By a third variant of this third broad aspect of this invention, and/or the above variants thereof, each of the first guide cylinder and the second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly. By a first variation thereof, there are two the encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of the upper male stripping die assembly.
By a fourth variant of the above broad aspects of this invention, the presser rail includes a fixed lower resilient pad.
By a fifth variant of the above broad aspects of this invention, the presser rail includes a fixed resilient pad and a replaceable terminal resilient pad which is spaced longitudinally-apart from the fixed terminal resilient pad. By a first variation thereof, the assembly includes a metallic pin secured to the presser rail and having a downwardly projecting pointed end. By a second variation thereof, the terminal resilient pad comprises two transversely spaced-apart pads. By a third variation thereof, the assembly includes a metallic element disposed between the transversely spaced-apart pads, the metallic element including a downwardly projecting pointed end.
By a sixth variant of the above broad aspects of this invention, the inner housing is reciprocally movable within the outer housing. By a first variation thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member. By a ninth variation thereof, the guide cylinder includes a piston rod, the lower end of which is secured to the inner housing.
The present invention in a fourth aspect, provides a stripper assembly comprising a stripper assembly including an upper male blanking die assembly. The upper male stripping die assembly includes at least one pair of longitudinally-spaced-apart circular apertures, and at least one depending die having a shape coincident with the outline of a carton blank to be stripped. The lower apertured female stripping die is provided for supporting a carton blank to be stripped, the lower stripping die including a central area having an aperture of a shape coincident with the outline of a carton blank to be stripped, and peripheral support areas. The upper male stripping die assembly is movable towards and away from the female stripping die. A presser assembly is provided. The presser assembly includes a first guide cylinder, the first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret. The first guide cylinder includes an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end. The first guide cylinder is secured to the upper male blanking die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by a locking member. The presser assembly includes a second guide cylinder, the second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret. The second guide cylinder includes an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, the second guide cylinder being secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die, the intermediate turret being secured against the upper surface of the upper male stripping die by a locking member. The presser rail has a first end and a second end. The first end of the presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot, and the second end of the presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot. The first end of the presser rail is connected to the first guide cylinder by the ball-shaped end of the stem of the first guide cylinder being slidably retained in the first, longitudinally-extending, cylindrical channel, with the stem of the first guide cylinder being slidable within the first longitudinally-extending slot such that the connected first end of the presser rail may move in any direction independently from the second end, and the second end of the presser rail being connected to the second guide cylinder by the ball-shaped end of the stem of the second guide cylinder being slidably retained in the second longitudinally-extending cylindrical channel, with the stem of the second guide cylinder being slidable within the second longitudinally-extending slot, such that the connected second end of the presser rail may move in any direction independently from the second end. In use, the presser rail is uniformly pressed against the selvedge or waste portions of the carton blank for temporarily holding the selvedge or waste portions of the carbon blank on the female stripping die during a stripping operation, and to allow the carton blank to be forced through the aperture in the female stripping die. .
By a first variant of this fourth broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate externally-threaded turret being secured against the upper surface of the upper male stripping die by an internally-threaded locking nut, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate externally-threaded turret member projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate externally-threaded turret being secured against the upper surface of the upper male stripping die assembly by an internally-threaded locking nut. By a first variation thereof, the locking nut includes a plurality of notches around its circumference, the upper male stripping die assembly includes a plurality of holes surrounding the circular aperture, and a pin extends through a selected notch into a selected hole, thereby to prevent accidental unscrewing of the internally-threaded locking nut..
By a second variant of this fourth broad aspect of this invention, the first guide cylinder is secured to the upper male stripping die assembly by extending through an associated first circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of the upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by an encircling O-ring, and the second guide cylinder is secured to the upper male stripping die assembly by extending through an associated second circular aperture, with its lower terminal ring abutting a lower surface of the area around the circular aperture of upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding the circular aperture of the upper male stripping die assembly, the intermediate turret being secured against the upper surface of the upper male stripping die by an encircling O-ring.
By a third variant of this fourth broad aspect of this invention, and or the above variants thereof, the presser rail includes a resilient pad for engaging the waste or selvedge of the carton blank.
By a fourth variant of this fourth broad aspect of this invention, and or the above variants thereof, each of the first guide cylinder and the second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly. By a first variation thereof, there are two the encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of the upper male stripping die assembly.
By a fifth variant of this fourth broad aspect of this invention, the presser rail includes a coextensive fixed resilient lower pad.
By a sixth variant of this fourth broad aspect of this invention, and/or the above variants thereof, the presser rail includes a fixed resilient pad and a replaceable terminal resilient pad which is spaced longitudinally-apart from the fixed terminal resilient pad. By a first variation thereof, a metallic pin secured to the presser rail and has a downwardly projecting painted end. By a second variation thereof, the terminal resilient pad comprises two transversely spaced-apart pads. By a third variation thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member.
By a seventh variant of this fourth broad aspect of this invention, and or the above variants thereof, the inner housing is resiliently mounted within the outer housing, and is upwardly movable against the reaction of a spring member.
By an eighth variant of this fourth broad aspect of this invention, and or the above variants thereof, the stripper assembly includes a stop member for limiting movement of the presser rail away from the outer housing. By a first variation thereof, the stripper assembly includes a cushion which is disposed between the stop member and the outer housing. By a second variation thereof, the cushion comprises a washer which is composed of a resilient material.
(e) DESCRIPTION OF THE FIGURES
In the accompanying drawings:
FIG. lA is a side elevational view of a presser assembly of an embodiment of an aspect of this invention including an upper male blanking die assembly which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton resting thereon, in its unpressed orientation.
FIG. 1B is a side elevational view of the presser bar assembly of an embodiment of an aspect of this invention shown in FIG. lA, including an upper male blanking die which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton having been pressed through the lower female blanking die.
FIG. 2 is a perspective view of a presser assembly of an embodiment of an aspect of this invention including an upper male blanking die which is provided with a presser bar assembly of an aspect of this invention secured thereto, and a lower female blanking die with a blanked carton having been pressed through the lower female blanking die.
FIG. 3 is an enlarged central cross-sectional side view of the presser assembly of an embodiment of an aspect of this invention, also showing the attachment of the guide cylinder to the upper male blanking die assembly, (the male blanking die per se being omitted for clarity) and the attachment of the guide cylinder to the presser bar.
FIG. 4 is a detail of the attachment of the guide cylinder to the presser bar.
FIG. 5 is a perspective view, partially broken away, of the attachment of a guide cylinder to the presser bar.
FIG. 6 is a perspective view, partially broken away, showing one embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly.
FIG. 7 is a perspective view, partially broken away, showing a second embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly.
FIGS. 8 to 11 are views showing a third embodiment of a manner of attaching the guide cylinder to the upper male blanking die assembly, in which FIG. 8 is a top plan view of the area of the upper male blanking die assembly where the guide cylinder is to be attached, FIG. 9 is a top plan view of a locking member, FIG. 10 is a top plan view of the connected elements, and FIG. 11 is a perspective view showing the manner of connecting the guide cylinder to the upper male blanking die assembly.
FIG. 12 is a vertical section through one embodiment of the lower end of an assembled guide cylinder/presser bar.
FIG. 13 is a composite, exploded, perspective view showing the manner of assembly of the embodiment shown in FIG. 12.
FIG. 14 is a section through another embodiment of the lower end of an assembled guide cylinder/presser bar.
FIG. 15 is a bottom plan view of the assembly shown in FIG. 14.
(fj AT LEAST ONE MODE FOR CARRYING OUT THE INVENTION
The present invention, in its broad aspects, provides an improvement over the three embodiments of the connection of the guide cylinder to the presser rail as described in the three above-identified Oetlinger U.S. patents. Thus, the present invention, in its broad aspects, provides a novel attachment system of a cylindrical guide member to an upper support (i.e., a male blanking die assembly) and a novel attachment system of the cylindrical guide member to a presser rail. These improvements will be described in more detail in FIGS. 3 to 6.
Referring more generally to FIG. lA, FIG. 1B and FIG. 2, a presser assembly in accordance with one embodiment of an aspect of the present invention is generally designated by the reference number 100. The presser assembly 100 includes presser rail 103 which is moved vertically during a blanking or stripping operation. The male pressing die to strip the carton blanks away from the selvedge or wastes shown as 108 herein, for clarity. The upper male blanking die assembly101 is an elongated member having a first, upper face 110 and a second, lower face 111. The male pressing die 108 is secured to lower face 111. In addition, each face 110, 111, is interconnected by at least one pair of spaced-apart circular apertures extending through the upper male blanking die assembly 101. In practice there would generally be, e.g., over twenty of such pairs of apertures, to enable a like number of presser bars. These apertures are provided in the upper male blanking die assembly 101 to facilitate the mounting of a cylindrical guide cylinder 105 to the male blanking die assembly 101, in a manner to be described hereinafter.
FIG. lA shows the stripping machine before the stripping operation, with the carton blank 107, including its soon-to-become waste or selvedge 109, resting on the lower, female blanking die 102, and with the male blanking die 108 immediately above the carton blank 107.
FIG. 1B shows the stripping machine after the stripping operation, with the male blanking die 108 having pushed the carton blank 107 through the opening in the female blanking die 102, and with the presser bar 103 holding the waste or selvedge 109 onto the perimeter of the female blanking die 102.
FIG. 2 shows, in perspective, a schematic version of a stripping machine. The stripping machine includes an upper male stripping die assembly 101, to the bottom 111 of which the male stripping die 108 is secured, and a lower female stripping die 103. As is conventional, the upper male stripping die assembly 101 thus includes a depending, profiled male stripping die 108 of the same shape as the outline of the carton blank 107, and the lower female stripping die 103 has a carton-blank aperture 114 therein which is of the same shape as the outline of the carton blank 107. While only one carton blank 107 is shown, whereby there is one profiled male stripping die 108 and one carton-blank aperture 114, in commercial practice, there will be a plurality, e.g., twenty or more, blanks 107.
Accordingly, the upper male stripping die assembly 101 would generally include a plurality of profiled male stripping dies 108 coinciding with the number of blanks 107.
Similarly, the lower female blanking die 102 includes a like plurality of carton-blank apertures 114, in the form of a grid of a plurality of mutually-transverse grid rails to provide openings for the carton blanks to be discharged therethrough. The conventional grid rails (not shown) and the periphery of the die 102 support the waste or selvedge, e.g., of the carton blank 107 to be stripped away.
The presser assembly 100 includes a presser bar 103 which is secured to a pair of guide cylinders only one of which guide cylinder 105, being shown. The presser bar 103 is secured to the guide cylinder 105 in a variety of manners to be described in greater detail hereinafter. The guide cylinder105 is secured to the upper male stripping die assembly 101 in a variety of manners to be described in greater detail hereinafter. The stripped carton blank 107 is shown below the stripping machine.
As seen in FIG. 3, FIG. 4, and FIG. 5, the cylindrical guide cylinder 105 includes a housing for mounting to the male blanking die assembly 101. The housing includes a tubular body portion and a cylindrical stop ring portion extending outwardly therefrom.
More particularly, the cylindrical guide cylinder includes an outer housing 350 including a central bore 352. An inner housing 329 is longitudinally slidably disposed within central bore 252. A piston rod 354 extends through the central bore 356 of the inner housing member 329 and is threadedly secured in an internally threaded bore 358 thereof by threaded end 360. The other end of piston rod 354 extends through a bushing 362 at the upper end 364 of the outer housing 350. A coil spring 366 encircles the piston rod 354 and rests with its lower end at the base of bore 356, and with its upper end abutting the disc portion 368 of the bushing 362. Bushing 362 is held in place by lock ring 370.
The lower end of the outer housing 350 is provided with a terminal stop ring and with a pair of suitably spaced-apart encircling grooves 380, 382 within each one of which is secured an O-ring 384,388. Immediately above the upper O-ring 384, the housing 350 is provided with an externally threaded turret 388. These external threads are adapted to cooperate with an internally-threaded bearing nut or locking member 390 to hold each cylindrical guide cylinder 105 to the male stripping die assembly 101, in a manner to be described hereinafter.
As previously described, the lower end of inner housing 329 has an integral depending stem 328 which terminates in a knob 330.
In the assembly of the cylindrical guide cylinder105, the piston rod 354 is extended through bore 356 and its lower threaded end 360 is threaded into the internally-threaded well at lower end of the inner housing 329, with the piston rod being encircled by the coil spring 366. The so-connected inner housing 329 is slidably installed into the bore 352 of the outer housing 350 until the spring 366 abuts the lower end of upper guide bushing 362.
The amount of the biassing between the outer housing 350 and the inner housing 329 is adjusted and the upper end of the piston rod 354 is secured in place. This securing in place is achieved by means of a jam nut 370 which is secured in place by a nylon lockout 372, with a rubber shock absorber 374 disposed between the upper end of the outer housing 350 and the jam nut 370.
Each cylindrical guide cylinder 145 is secured to the upper male stripping die assembly 101 in the following manner, referring to FIG. 3 and FIG. 6..
As previously described, the male stripping die assembly 101 is provided with a circular hole 314 therethrough for each cylindrical guide cylinder 105. The cylindrical guide cylinder 105, which has been assembled as described above, is inserted through the circular hole 314 so that the stop ring 378 abuts the lower face 111 of the upper male stripping die assembly 101. The two spaced-apart O-rings 384,386 seal against the inner periphery of the circular hole 314, with the externally threaded turret 388 projecting above the top surface 110 of the upper male stripping die assembly 101. Then the bearing nut 390 is threaded into the externally threaded turret 388 and is threaded until its lower surface abuts the upper surface 110 of the upper male stripping die assembly 101 to secure the cylindrical guide cylinder 105 to the upper male stripping die 101, with the stem 328 and its terminal knob 330 extending below the male stripping die 101.
The terminal knob 330 of the stem 328 is slidably fitted into the cylindrical, longitudinally-extending channel 334 of the presser rail 103 and can slide therein by way of the slot 335. The combination of the knob 330 and the channel 334 and slot 335, provides a universal joint-type connection, allowing unrestricted rotational movement of the presser rail 103 with respect to the cylindrical guide members 105.
The presser rail 103 includes an upper presser bar 331 (within which are channel 334 and slot 335 and a lower resilient rubber-like rail 332 which is secured to the bottom 333 of upper presser bar 331.
Because of these universal joint-type interconnections between the cylindrical guide members 105 and the presser rail 103 as described above, the ends of the presser rail 103 may move in all directions, each in unison or independently of the opposite end of the presser rail 110. This, in turn, increases the flexibility of the presser rail 103.
FIG. 7 shows a second embodiment of an aspect of the connection of the cylindrical guide member 105 to the upper male stripping die assembly 101 in the presser assembly of an aspect of the present invention. This is constituted by a modification of the cylindrical guide cylinder, now given reference numeral 705. Cylindrical guide cylinder 705 includes most parts which are identical with cylindrical guide cylinder 105, and those parts are provided with the same reference numbers. However, in this embodiment, turret 788 is not provided with the external threads, but is, instead provided with a snap-ring interlock 789.
The connection of cylindrical guide cylinder 705 to upper male stripping die 101 is the same as previously described, with the following change. When the turret 758 having the snap ring interlock 789 extends above upper surface 110 of upper male stripping die assembly 101, the snap ring 790 is engaged with the snap ring interlock 789 on the turret 788 and is urged downwardly until it abuts the upper surface 110 of the upper male stripping die 101, to secure the cylindrical guide cylinder 705 to the upper male stripping die 101.
FIG. 8, FIG. 9, FIG. 10 and FIG. 11 show another embodiment of the securement of the cylindrical guide cylinder to the upper male stripping die assembly 101. As seen in FIG. 8, the peripheral area around an aperture 814 is provided with a plurality, namely nine, small drill holes 815. The locking member 890 is a ring-like member 891 which is provided with internal threads 891 (See FIG. 11) and four equi-spaced-apart notches 892.
As seen in FIG. 11, the locking member 890 has been threaded by threads 891 into the threads of turret 388, until one of the notches 892 is lined up around one of the small drill holes 815. A pin 893 is inserted through that drill hole 815 to prevent locking member 890 from accidentally unscrewing.
FIG. 12 and FIG. 13 show another embodiment of the lower end of the cylindrical guide/presser rail 105. In this embodiment, the presser rail 1203 includes an upper member 1231, a major lower fixed resilient material pad 1232, and a replaceable, resilient material split tip 1233. In the mid-area between split tips 1233 is a rigid, e.g., steel, member 1234, which is provided with a projecting tip 1235. In all other aspects, the guide cylinder 808 is attached to the presser rail 805 in the above-described manner. When in use, the projecting tip 1235 of the presser bar 1203 slightly impales the waste or selvedge 109, better to secure the carton blank in place on the female blanking die 102.
FIG. 14 and FIG. 15 shows yet still another embodiment of the lower end of the cylindrical guide/presser rail 105. In this embodiment, the presser rail 1403 is provided with a depending pin 1406, as well as a major resilient material pad 1432 and a terminal resilient material pad 1432. The pin 1406 includes a head 1407 and a shank 1432 as well as a pointed tip 1409. Head 1407 is secured within countersunk well 1410 and the shank 1408 is threaded into internally threaded aperture 1411. When in use, the pointed tip 1409 of the presser bar 1403 impales the waste or selvedge 109, better to secure the carton blank in place on the female blanking die.
In operation, the upper male blanking die assembly, with its attached depending, blanking die and its attached, depending presser bar is urged downwardly, in the usual manner, towards the carton blanks which are supported in the lower female die plate. The presser bars first engage the soon-to-be waste or selvedge surrounding the carton blank to hold it firmly against the lower female blanking die. The upper male blanking die then continues in its downward motion to cause the male blanking die to punch the carton blank through the opening in the lower female blanking die, and to deposit the carton blank on a suitable platform. The waste or selvedge remains held to the lower female blanking die.
The upper male blanking die is then moved upwardly, thereby simultaneously releasing the gripping of the presser bars on the waste or selvedge. Conventional gripping fingers then grip the waste or selvedge and discard it as waste, allowing another carton blank to be placed in the lower female blanking die.
The above procedure is then repeated.
As a result of these specific universal joint-type interconnections as described above, connection between the cylindrical guide members and the presser rail is made easy.
Due to the various degrees of motion of these universal-type interconnection means, the cylindrical guide member and the presser rail need not be accurately aligned for the connection to be made. Moreover, the presser rail may move vertically upwardly and downwardly even if the movement is not 100 % vertical without impediment, since the ends of the presser rail are independently movable. Contact of the presser rail with the carton blank need not be simultaneous for the length of the presser rail. As a result, the waste or selvedge of the carton blank is more adequately supported. This, in turn, prevents jamming the blanking operating machinery.
As a result of the cooperation between the various embodiments of the turret and the cooperating snap ring or bearing nut, the cylinder assembly can very easily be attached to the upper male blanking die assembly. In addition, the O-rings assure a positive gripping of the guide cylinder within the hole in the upper male blanking die assembly.
Thus, since each guide cylinder need not be screwed onto the upper male blanking die, as in the prior art, the connection of the guide cylinder to the upper blanking die is greatly facilitated.
Claims (35)
1. An improvement in a presser assembly for attachment to an upper male stripping die assembly for temporarily holding a carton blank in place on a female blanking die during a stripping operation, the improvement comprising:
a) a presser rail having a first end and a second end;
b) a first guide cylinder;
c) a second guide cylinder;
d) a first connection assembly of a universal joint-type for flexibly connecting said first guide cylinder to said first end of said presser rail, such that said first connected end of said presser rail may move in any direction independently from said second end; and e) a second connection assembly of a universal joint-type for flexibly connecting said second guide cylinder to said end of said second presser rail, such that said second connected end of said presser rail may move in any direction independently from said first end.
a) a presser rail having a first end and a second end;
b) a first guide cylinder;
c) a second guide cylinder;
d) a first connection assembly of a universal joint-type for flexibly connecting said first guide cylinder to said first end of said presser rail, such that said first connected end of said presser rail may move in any direction independently from said second end; and e) a second connection assembly of a universal joint-type for flexibly connecting said second guide cylinder to said end of said second presser rail, such that said second connected end of said presser rail may move in any direction independently from said first end.
2. A presser rail assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, comprising:
a) an upper male blanking die assembly having at least one pair of two spaced-apart circular apertures;
b) a presser rail having a first end and a second end;
c) a first guide cylinder which is flexibly connected to said first end of said presser rail, such that said first connected end of said presser rail may move in any direction independently from said second end;
d) a second guide cylinder which is flexibly connected to said presser rail, such that said second connected end of said presser rail may move in any direction independently from said first end; and e) each guide cylinder being secured to said upper male stripping die by the combination of each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, with a lower stop ring of said guide cylinder abutting the lower surface of said upper male stripping die assembly, and with a projecting turret portion of said guide cylinder being secured against the upper surface of said upper male stripping die by a suitable locking member.
a) an upper male blanking die assembly having at least one pair of two spaced-apart circular apertures;
b) a presser rail having a first end and a second end;
c) a first guide cylinder which is flexibly connected to said first end of said presser rail, such that said first connected end of said presser rail may move in any direction independently from said second end;
d) a second guide cylinder which is flexibly connected to said presser rail, such that said second connected end of said presser rail may move in any direction independently from said first end; and e) each guide cylinder being secured to said upper male stripping die by the combination of each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, with a lower stop ring of said guide cylinder abutting the lower surface of said upper male stripping die assembly, and with a projecting turret portion of said guide cylinder being secured against the upper surface of said upper male stripping die by a suitable locking member.
3. The presser rail assembly as claimed in claim 2 wherein:
g) each of said first guide cylinder and said second guide cylinder is secured to said upper male stripping die assembly by each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, such that a lower stop ring thereof abuts the bottom surface of said upper male stripping die assembly and an upper externally-threaded turret portion thereof projects above the top surface of said upper male stripping die assembly and is secured thereto by an internally threaded locking nut.
g) each of said first guide cylinder and said second guide cylinder is secured to said upper male stripping die assembly by each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, such that a lower stop ring thereof abuts the bottom surface of said upper male stripping die assembly and an upper externally-threaded turret portion thereof projects above the top surface of said upper male stripping die assembly and is secured thereto by an internally threaded locking nut.
4. The presser rail assembly as claimed in claim 3, wherein said internally-threaded locking nut includes: a plurality of notches around its circumference; wherein said upper male stripping die assembly includes a plurality of holes surrounding said circular aperture;
and wherein a pin extends through a selected notch into a selected hole;
thereby to prevent accidental unscrewing of said internally-threaded locking nut.
and wherein a pin extends through a selected notch into a selected hole;
thereby to prevent accidental unscrewing of said internally-threaded locking nut.
5. The presser rail assembly as claimed in claim 2, wherein:
h) each of said first guide cylinder and said second guide cylinder is secured to said upper male stripping die assembly by each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, such that a lower stop ring thereof abuts the bottom surface of said upper male stripping die assembly and an upper turret portion thereof projects above the top of said upper male stripping die assembly and is secured thereto by an encircling O-ring.
h) each of said first guide cylinder and said second guide cylinder is secured to said upper male stripping die assembly by each of said guide cylinders extending through an associated circular aperture in said upper male stripping die assembly, such that a lower stop ring thereof abuts the bottom surface of said upper male stripping die assembly and an upper turret portion thereof projects above the top of said upper male stripping die assembly and is secured thereto by an encircling O-ring.
6. An assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, said assembly comprising: an upper male stripping die assembly, said upper male stripping die assembly being provided with:
A) at least one pair of longitudinally-spaced-apart, circular apertures, and B) a presser assembly, said presser assembly comprising:
(a) a first guide cylinder, said first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said first guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said first guide cylinder being secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said first circular aperture of said upper male stripping die, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by a locking member;
(b) a second guide cylinder, said second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said second guide cylinder being secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower ring abutting a lower surface of the area around said second circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by a locking member;
(c) a presser rail having a first end and a second end, wherein (i) said first end of said presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot; and (ii) said second end of said presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot;
(d) said first end of said presser rail being connected to said first guide cylinder by said ball-shaped end of said stem of said first guide cylinder being slidably retained in said first, longitudinally-extending, cylindrical channel, with said stem of said first guide cylinder being slidable within said first longitudinally-extending slot such that said connected first end of said presser rail may move in any direction independently from said second end; and (e) said second end of said presser rail being connected to said second guide cylinder by said ball-shaped end of said stem of said second guide cylinder being slidably retained in said second longitudinally-extending cylindrical channel, with said stem of said second guide cylinder being slidable within said second longitudinally-extending slot, such that said connected second end of said presser rail may move in any direction independently from said second end.
A) at least one pair of longitudinally-spaced-apart, circular apertures, and B) a presser assembly, said presser assembly comprising:
(a) a first guide cylinder, said first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said first guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said first guide cylinder being secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said first circular aperture of said upper male stripping die, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by a locking member;
(b) a second guide cylinder, said second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said second guide cylinder being secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower ring abutting a lower surface of the area around said second circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by a locking member;
(c) a presser rail having a first end and a second end, wherein (i) said first end of said presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot; and (ii) said second end of said presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot;
(d) said first end of said presser rail being connected to said first guide cylinder by said ball-shaped end of said stem of said first guide cylinder being slidably retained in said first, longitudinally-extending, cylindrical channel, with said stem of said first guide cylinder being slidable within said first longitudinally-extending slot such that said connected first end of said presser rail may move in any direction independently from said second end; and (e) said second end of said presser rail being connected to said second guide cylinder by said ball-shaped end of said stem of said second guide cylinder being slidably retained in said second longitudinally-extending cylindrical channel, with said stem of said second guide cylinder being slidable within said second longitudinally-extending slot, such that said connected second end of said presser rail may move in any direction independently from said second end.
7. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 6, wherein said first guide cylinder is secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding said circular aperture of the upper male stripping die assembly, said externally-threaded intermediate turret being secured against the upper surface of said upper male stripping die assembly by an internally-threaded locking nut; and wherein said second guide cylinder is secured to said upper support member by extending through an associated second said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by an internally-threaded locking nut.
8. The assembly as claimed in claim 7, wherein: said internally-threaded locking nut includes a plurality of notches around its circumference; wherein said upper male stripping die assembly includes a plurality of holes surrounding said circular aperture;
and wherein a pin extends through a selected notch into a selected hole; thereby to prevent accidental unscrewing of said internally-threaded locking nut.
and wherein a pin extends through a selected notch into a selected hole; thereby to prevent accidental unscrewing of said internally-threaded locking nut.
9. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 6, wherein said first guide cylinder is secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by an encircling O-ring; and wherein said second guide cylinder is secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by an encircling O-ring.
10. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in any one of claims 6 to 9, wherein each said first guide cylinder and said second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly.
11. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 10, wherein there are two said encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of said upper male stripping die assembly.
12. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in any one of claims 6 to 11, wherein said presser rail includes a fixed lower resilient pad.
13. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in any one of claims 6 to 11 wherein said presser rail includes a fixed resilient pad and a replaceable terminal resilient pad which is spaced longitudinally-apart from said fixed terminal resilient pad.
14. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 13, including a metallic pin secured to said presser rail and having a downwardly projecting pointed end.
15. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 13, wherein said terminal resilient pad comprises two transversely spaced-apart pads.
16. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 15, including a metallic element disposed between said transversely spaced-apart pads, said metallic element including a downwardly projecting pointed end.
17. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in any one of claims 6 to 16, wherein said inner housing is reciprocally movable within said outer housing.
18. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 17, wherein said inner housing is resiliently mounted within said outer housing, and is upwardly movable against the reaction of a spring member.
19. The assembly for temporarily holding carton blanks in place on a female blanking die during a blanking or stripping operation, as claimed in claim 18 or claim 19, wherein said guide cylinder includes a piston rod, the lower end of which is secured to said inner housing.
20. A stripper assembly comprising:
(I) an upper male blanking die assembly, said upper male stripping die assembly including at least one pair of longitudinally-spaced-apart circular apertures, and at least one depending die having a shape coincident with the outline of a carton blank to be stripped; and also including (III) a presser assembly, said presser assembly comprising:
(a) a presser rail having a first end and a second end, wherein (i) said first end of said presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot; and (ii) said second end of said presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot;
(b) a first guide cylinder, said first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said first guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said first guide cylinder being secured to said upper male blanking die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die by a locking member;
(c) a second guide cylinder, said second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said second guide cylinder being secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower terminal ring abutting a lower surface of the area around said circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die, said intermediate turret being secured against the upper surface of said upper male stripping die by a locking member;
(d) said first end of said presser rail being connected to said first guide cylinder by said ball-shaped end of said stem of said first guide cylinder being slidably retained in said first, longitudinally-extending, cylindrical channel, with said stem of said first guide cylinder being slidable within said first longitudinally-extending slot such that said connected first end of said presser rail may move in any direction independently from said second end; and (e) said second end of said presser rail being connected to said second guide cylinder by said ball-shaped end of said stem of said second guide cylinder being slidably retained in said second longitudinally-extending cylindrical channel, with said stem of said second guide cylinder being slidable within said second longitudinally-extending slot, such that said connected second end of said presser rail may move in any direction independently from said second end;
and (III) a lower apertured female stripping die for supporting a carton blank to be stripped, said lower female stripping die including a central area having an aperture of a shape coincident with the outline of a carton blank to be stripped, and peripheral support areas;
said upper male stripping die assembly being movable towards and away from said female stripping die; whereby, in use, said presser rail is uniformly pressed against the selvedge or waste portions of said carton blank for temporarily holding said selvedge or waste portions of said carbon blank on said female stripping die during a stripping operation, and to allow said carton blank to be forced through said aperture in said female stripping die.
(I) an upper male blanking die assembly, said upper male stripping die assembly including at least one pair of longitudinally-spaced-apart circular apertures, and at least one depending die having a shape coincident with the outline of a carton blank to be stripped; and also including (III) a presser assembly, said presser assembly comprising:
(a) a presser rail having a first end and a second end, wherein (i) said first end of said presser rail includes a first, longitudinally-extending, cylindrical channel which opens to a first, upwardly-directed, longitudinally-extending slot; and (ii) said second end of said presser rail includes a second, longitudinally-extending, cylindrical channel which opens to a second, upwardly-directed, longitudinally-extending slot;
(b) a first guide cylinder, said first guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said first guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said first guide cylinder being secured to said upper male blanking die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die by a locking member;
(c) a second guide cylinder, said second guide cylinder including an outer housing terminating in a lower ring and an intermediate turret, said second guide cylinder including an inner housing having a depending, longitudinally-extending stem terminating in a ball-shaped end, said second guide cylinder being secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower terminal ring abutting a lower surface of the area around said circular aperture of upper male stripping die assembly, and with its intermediate member projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die, said intermediate turret being secured against the upper surface of said upper male stripping die by a locking member;
(d) said first end of said presser rail being connected to said first guide cylinder by said ball-shaped end of said stem of said first guide cylinder being slidably retained in said first, longitudinally-extending, cylindrical channel, with said stem of said first guide cylinder being slidable within said first longitudinally-extending slot such that said connected first end of said presser rail may move in any direction independently from said second end; and (e) said second end of said presser rail being connected to said second guide cylinder by said ball-shaped end of said stem of said second guide cylinder being slidably retained in said second longitudinally-extending cylindrical channel, with said stem of said second guide cylinder being slidable within said second longitudinally-extending slot, such that said connected second end of said presser rail may move in any direction independently from said second end;
and (III) a lower apertured female stripping die for supporting a carton blank to be stripped, said lower female stripping die including a central area having an aperture of a shape coincident with the outline of a carton blank to be stripped, and peripheral support areas;
said upper male stripping die assembly being movable towards and away from said female stripping die; whereby, in use, said presser rail is uniformly pressed against the selvedge or waste portions of said carton blank for temporarily holding said selvedge or waste portions of said carbon blank on said female stripping die during a stripping operation, and to allow said carton blank to be forced through said aperture in said female stripping die.
21. The stripper assembly as claimed in claim 20, wherein said first guide cylinder is secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate externally-threaded turret projecting above an upper surface of the area surrounding said circular aperture of the upper male stripping die assembly, said externally-threaded intermediate turret being secured against the upper surface of said upper male stripping die by an internally-threaded locking nut; and wherein said second guide cylinder is secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower terminal ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its externally-threaded intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said externally-threaded intermediate turret being secured against the upper surface of said upper male stripping die assembly by an internally-threaded locking nut.
22. The stripper assembly as claimed in claim 21, wherein: said internally-threaded locking nut includes a plurality of notches around its circumference, wherein said upper male stripping die assembly includes a plurality of holes surrounding said circular aperture;
and wherein a pin extends through a selected notch into a selected hole;
thereby to prevent accidental unscrewing of said internally-threaded locking nut.
and wherein a pin extends through a selected notch into a selected hole;
thereby to prevent accidental unscrewing of said internally-threaded locking nut.
23. The stripper assembly as claimed in claim 20, wherein said first guide cylinder is secured to said upper male stripping die assembly by extending through an associated first said circular aperture, with its lower terminal ring abutting a lower surface of the area around said circular aperture of said upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of the upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die by an encircling O-ring; and wherein said second guide cylinder is secured to said upper male stripping die assembly by extending through an associated second said circular aperture, with its lower terminal ring abutting a lower surface of the area around said circular aperture of upper male stripping die assembly, and with its intermediate turret projecting above an upper surface of the area surrounding said circular aperture of said upper male stripping die assembly, said intermediate turret being secured against the upper surface of said upper male stripping die assembly by an encircling O-ring.
24. The stripper assembly as claimed in any one of claims 20 to 23, wherein said presser rail includes a resilient pad for engaging said waste or selvedge of said carton blank.
25. The stripper assembly as claimed in any one of claims 19 to 24, wherein each said first guide cylinder and said second guide cylinder includes at least one encircling groove for receiving an O-ring for sealing engagement with the internal periphery of an associated circular aperture in the upper male stripping die assembly.
26. The stripper assembly as claimed in claim 25, wherein there are two said encircling grooves, each for receiving an associated O-ring, which are spaced apart by less than the thickness of said upper male stripping die assembly.
27. The stripper assembly as claimed in any one of claims 19 to 26, wherein said presser rail includes a coextensive fixed resilient lower pad.
28. The stripper assembly as claimed in any one of claims 19 to 26, wherein said presser rail includes a fixed resilient lower pad and a replaceable resilient lower pad which is spaced longitudinally-apart from said fixed resilient lower pad.
29. The stripper assembly as claimed in claim 25, including a metallic pin secured to said presser rail and having a downwardly projecting pointed end.
30. The stripper assembly as claimed in claim 28, wherein said terminal resilient pad comprises two transversely spaced-apart pads.
31. The stripper assembly as claimed in claim 30, wherein said inner housing is resiliently mounted within said outer housing, and is upwardly movable against the reaction of a spring member.
32. The stripper assembly as claimed in any one of claims 20 to 31, wherein said inner housing is resiliently mounted within said outer housing, and is upwardly movable against the reaction of a spring member.
33. The stripper assembly as claimed in an one of claims 20 to 31, including a stop member for limiting movement of said presser rail away from said outer housing.
34. The stripper assembly as claimed in claim 33, including a cushion which is disposed between said stop member and said outer housing.
35. The stripper assembly as claimed in claim 34, wherein said cushion comprises a washer which is composed of a resilient material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002317290A CA2317290A1 (en) | 2000-08-29 | 2000-08-29 | Presser assembly and fixture for fastening presser assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002317290A CA2317290A1 (en) | 2000-08-29 | 2000-08-29 | Presser assembly and fixture for fastening presser assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2317290A1 true CA2317290A1 (en) | 2002-02-28 |
Family
ID=4167015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002317290A Abandoned CA2317290A1 (en) | 2000-08-29 | 2000-08-29 | Presser assembly and fixture for fastening presser assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2317290A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325232C (en) * | 2003-09-01 | 2007-07-11 | 鲍勃斯脱股份有限公司 | Pressing unit for separating the diecut blanks of a sheet |
| ES2537839A1 (en) * | 2013-12-12 | 2015-06-12 | David GARCÍA CRESPO | Ejector for cutting of cardboard sheets, for flat die-cutter or self-tapping presses (Machine-translation by Google Translate, not legally binding) |
| CN107907056A (en) * | 2017-12-15 | 2018-04-13 | 南京鑫业诚机器人科技有限公司 | Miniature laser segment difference detection device |
| CN111645363A (en) * | 2020-06-21 | 2020-09-11 | 江西赣米香食品科技有限公司 | Stripping machine for instant noodle food grade white paperboard |
| CN111805969A (en) * | 2020-08-17 | 2020-10-23 | 孙同昂 | Die cutting equipment for carton processing and working method thereof |
-
2000
- 2000-08-29 CA CA002317290A patent/CA2317290A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325232C (en) * | 2003-09-01 | 2007-07-11 | 鲍勃斯脱股份有限公司 | Pressing unit for separating the diecut blanks of a sheet |
| ES2537839A1 (en) * | 2013-12-12 | 2015-06-12 | David GARCÍA CRESPO | Ejector for cutting of cardboard sheets, for flat die-cutter or self-tapping presses (Machine-translation by Google Translate, not legally binding) |
| CN107907056A (en) * | 2017-12-15 | 2018-04-13 | 南京鑫业诚机器人科技有限公司 | Miniature laser segment difference detection device |
| CN111645363A (en) * | 2020-06-21 | 2020-09-11 | 江西赣米香食品科技有限公司 | Stripping machine for instant noodle food grade white paperboard |
| CN111805969A (en) * | 2020-08-17 | 2020-10-23 | 孙同昂 | Die cutting equipment for carton processing and working method thereof |
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