EP2634128B1 - Expansion mandrel for coils - Google Patents
Expansion mandrel for coils Download PDFInfo
- Publication number
- EP2634128B1 EP2634128B1 EP12199120.2A EP12199120A EP2634128B1 EP 2634128 B1 EP2634128 B1 EP 2634128B1 EP 12199120 A EP12199120 A EP 12199120A EP 2634128 B1 EP2634128 B1 EP 2634128B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inserts
- liner
- sleeve
- profiles
- hub
- 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.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
- B65H75/24—Constructional details adjustable in configuration, e.g. expansible
- B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
- B65H75/248—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by actuator movable in axial direction
Definitions
- the present invention relates to an expansion gripper or chuck for supporting reels such as those used, for example, on printing machines or on laminating machines.
- the invention relates to an expansion gripper comprising a cylindrical body provided with a plurality of elements movable radially from a position in which they are retracted inside the profile of the gripper body and a position in which they are extracted to engage the tubular support of a reel.
- one end of the sheet to be wound is fastened to a tubular element (core) mounted on special supports which is rotated about its own axis.
- Some of these comprise a shaft, which can be inserted into the tubular reel support, provided with an external shell produced in several separate parts, each forming a circular sector, which can translate in radial direction.
- said sectors are movable from a retracted position, in which they are positioned close to one another, to an extracted position, in which they are pushed outward, by mechanical or pneumatic means, so as to engage the internal surface of the tubular core on which the film is wound.
- Another type instead comprises a pair of supports, each placed at one end of the tubular core, said supports being constituted by expansion grippers provided with movable gripping elements that are extracted from the profile of the gripper to engage the internal surface of the tubular core.
- said gripper comprises a plurality of gripping elements movable radially from a position in which they are retracted inside the profile of the gripper body to a position in which they are extracted to engage the tubular core of a reel, said elements being constituted by cylindrical inserts arranged along the circumference of the gripper body and being operated by a supporting shaft of the gripper sliding axially with respect thereto, and which has, for each series of gripping elements a truncated-cone shaped section in contact with the lower part of each insert, also shaped, so as to control extraction thereof during axial translation.
- Extraction of said elements takes place following an external force control using electric or pneumatic actuators.
- This configuration is preferred as it enables the maximum thrust of the actuator means to be limited, which is calculated on the basis of the thrust force that must be exerted by the gripping elements.
- the gripper could retract when the reel is still rotating, causing problems of safety or malfunction of the machine on which it is installed.
- these latter are provided with elastic thrust means with a degree of preload, which enable the gripping elements to engage the tubular element with the necessary force.
- Their configuration generally provides for transformation of a movement in axial direction into a movement in radial direction, obtained by means of sliding of two inclined surfaces; however, this generates a friction force between said surfaces proportional to the preload of the elastic means.
- DE 3339977 discloses a device for fastening a spool carrier to a shaft, comprising gripping elements which can be displaced radially outwards via rollers, said gripping elements being displaceable to a clamping position via stop surfaces for the spool carrier and being retracted by pressing on a central release button.
- the stop surface for the spool core is designed as a concentric, axially displaceable ring, which interlocks with a support of the release button alternately in the rear clamping position and the front release position.
- the object of the present invention is to produce a normally open expansion gripper that requires a limited force to take it from the open position to the closed position.
- the object of the present invention is to produce an expansion gripper in which the gripping elements are moved by low friction sliding means.
- an expansion gripper for supporting reels comprising a hollow shaft, at one end of which there is produced a hub, a sleeve mounted to slide along an axis on said hub with a first inner portion and a second outer portion, mutually coaxial, said sleeve being connected integral with a rod housed inside the shaft; a liner connected integral with the hub, provided with a plurality of through openings adapted to house inserts that act as gripping elements of the gripper, said second portion being provided with through openings adapted to house the same number of rolling means interposed between the outer surface of said hub and the lower surface of said inserts, said surfaces being provided with profiles adapted to cooperate with said rolling means to control the movement of said inserts from a closed position in which they are retracted inside the outline of the liner to an open position in which they project from said liner.
- the gripper according to the present invention further comprises:
- the expansion gripper indicated as a whole with 1, comprises a hollow shaft, at one end of which there is produced a hub 3, preferably with a cylindrical section, defining a cavity 4, also preferably cylindrical ( Fig.3 ).
- Said sleeve 5 On said hub 3 there is mounted, to slide along the axis X of the shaft 2, a sleeve, indicated as a whole with 5.
- Said sleeve 5 has two cylindrical and coaxial portions produced in two parts integral with each other, or produced in a single element.
- said sleeve comprises a first inner portion 6 sliding in contact with the inner surface of the cavity 4 and a second outer portion 7 sliding in contact with the outer surface of the hub 3.
- a liner 8, connected integral with the hub 3, is placed around said second outer portion 7 of the sleeve 5.
- the second outer portion 7 of the sleeve 5 slides between the outer surface of the hub 3 and the inner surface of the liner 8.
- Said liner 8 is provided with a plurality of through openings 9 which define the same number of seats adapted to house inserts, indicated as a whole with 10, which act as gripping elements of the gripper.
- Said inserts 10 are movable radially, sliding in the seats 9, from a closed position, in which they retract inside the contour of the liner 8, to an open position, in which they project from said liner 8 to engage a tubular core of a reel (not shown in the figure).
- said inserts 10 have a parallelepiped shape elongated in the direction X and tapered at the ends.
- the upper surface of said inserts 10 is provided with knurling or the like to promote friction on the surface of the tubular core of the reel.
- Said inserts 10 are preferably arranged on the liner 8 spaced angularly equidistant from one another and their number can vary according to the dimensions of the gripper; preferably at least 4 inserts are provided, spaced equidistant from one another by 90 degrees.
- One feature of the invention is that of providing for movement of said inserts 10 from the closed position to the open position, and vice versa, through low friction rolling means.
- said rolling means comprise a plurality of balls 13 adapted to cooperate with profiles 11 and 12 produced respectively on the outer surface of the hub 3 and on the lower surface of the inserts 10.
- said profiles comprise ridges 11a and 12a, alternated with recesses 11b and 12b.
- a plurality of adjacent incisions having a conical profile, which define said ridges and recesses.
- the balls 13 are instead housed in the same number of through openings 14, produced in the second portion 7 of the sleeve 5.
- said balls 13 can be in contact with the profiles 11 and 12 aligned with the ridges 11a and 12a or aligned with the recesses 11b and 12b.
- said rolling means can comprise rollers arranged with their axis perpendicular to the axis X of the shaft 2 so as to be able to roll on said profiles 11 and 12 following translation of the second portion 7 of the sleeve 5.
- Said translation of the second portion 7 of the sleeve 5 is controlled by a rod 15 that operates to oppose the force of elastic means, indicated with 16 in the figure.
- said rod is integral with the first portion 6 of the sleeve 5 through which it also draws the second portion 7.
- the elastic means 16 are instead interposed between a cover 17, connected integral with one end of the liner 8, and the bottom 18 of the first inner portion 6 of the sleeve 5.
- said elastic means By pressing on the bottom 18 of the first portion 6, said elastic means ensure that the second portion 7 also remains in a retracted position in which the balls 13 are aligned with the ridges 11a and 12a of the profiles 11 and 12, so that the inserts 10 are projecting from the outer surface of the liner 8, i.e. in open position.
- said elastic means 16 comprise an assembly of spring washers, positioned inside the first portion 6 of the sleeve, which ensure high rigidity and low cost.
- said rod 15 is also provided with a stop 19 interposed between the elastic means 16 and the bottom 18 of the inner portion 6 of the sleeve 5.
- the second portion 7 can also translate to a position in which the balls 13 are aligned with the recesses 11b and 12b of the profiles 11 and 12, and the inserts 10 can thus retract inside in the contour of the liner 8.
- return means comprising elastic means or the like.
- said return means 20 comprise torsion springs housed on pins 21 inserted in the liner 8 and arranged parallel to the axis X.
- Said springs are provided with projecting ends 22 housed in seats 23 produced in the sides of the inserts 10 ( Fig. 8 ).
- Said springs 20 are mounted with a preload so that, when the rod 15 is operated and the balls 13 are aligned with the recesses 11b and 12b, these draw the inserts 10 toward the inside of the gripper until they are taken to a position in which they are not projecting from the outer surface of the liner 8.
- the balls 13 can roll on said profiles 11 and 12, enabling almost all of the force exerted on the rod 15 to be utilized to compress the elastic means 16.
- the gripper thus produced normally open, can be taken to the closed position by acting on the rod 15 with a limited force, comparable with that required to operate the normally closed grippers according to the prior art.
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Manipulator (AREA)
- Moulding By Coating Moulds (AREA)
Description
- The present invention relates to an expansion gripper or chuck for supporting reels such as those used, for example, on printing machines or on laminating machines. In detail, the invention relates to an expansion gripper comprising a cylindrical body provided with a plurality of elements movable radially from a position in which they are retracted inside the profile of the gripper body and a position in which they are extracted to engage the tubular support of a reel.
- In industry there is often the need to wind thin sheets or films of a variety of materials, such as paper, sheets of plastic material, food grade paper, etc., in large reels.
- To form the reel, one end of the sheet to be wound is fastened to a tubular element (core) mounted on special supports which is rotated about its own axis.
- The problem posed in these cases is that of firmly constraining this tubular element, often made of cardboard or similar materials, to the rotating support.
- The same problem is posed inside machines that instead use said reels to perform the opposite operation, such as printing machines, where these large reels are unwound, or machines in which both operations are performed, such as laminating machines.
- Various types of supports for reels of film for the aforesaid purposes exist on the market.
- Some of these comprise a shaft, which can be inserted into the tubular reel support, provided with an external shell produced in several separate parts, each forming a circular sector, which can translate in radial direction.
- In practice, said sectors are movable from a retracted position, in which they are positioned close to one another, to an extracted position, in which they are pushed outward, by mechanical or pneumatic means, so as to engage the internal surface of the tubular core on which the film is wound.
- Another type instead comprises a pair of supports, each placed at one end of the tubular core, said supports being constituted by expansion grippers provided with movable gripping elements that are extracted from the profile of the gripper to engage the internal surface of the tubular core.
- An example of a gripper of this kind is described in the Italian utility model No.
269208 - In detail, said gripper comprises a plurality of gripping elements movable radially from a position in which they are retracted inside the profile of the gripper body to a position in which they are extracted to engage the tubular core of a reel, said elements being constituted by cylindrical inserts arranged along the circumference of the gripper body and being operated by a supporting shaft of the gripper sliding axially with respect thereto, and which has, for each series of gripping elements a truncated-cone shaped section in contact with the lower part of each insert, also shaped, so as to control extraction thereof during axial translation.
- Although functional, devices with this configuration have some limits or drawbacks.
- In fact, almost all expansion grippers produced for these applications are of the normally closed type, i.e. with the gripping elements in the retracted position when the gripper is not activated.
- Extraction of said elements takes place following an external force control using electric or pneumatic actuators.
- To maintain the grip of the gripper on the reel, these actuator means must therefore be maintained constantly activated.
- This configuration is preferred as it enables the maximum thrust of the actuator means to be limited, which is calculated on the basis of the thrust force that must be exerted by the gripping elements.
- However, in the case of a fault in the actuators or in an emergency, the gripper could retract when the reel is still rotating, causing problems of safety or malfunction of the machine on which it is installed.
- However, due to their configuration, prior art devices are not suitable for use as normally open devices.
- In fact, unlike the former, these latter are provided with elastic thrust means with a degree of preload, which enable the gripping elements to engage the tubular element with the necessary force. The greater the preload of these elastic means is, the higher the gripping force of the gripper will be.
- Their configuration generally provides for transformation of a movement in axial direction into a movement in radial direction, obtained by means of sliding of two inclined surfaces; however, this generates a friction force between said surfaces proportional to the preload of the elastic means.
- This makes it necessary to use actuator means, to take the gripper from the open position to the closed position, provided with a much higher maximum force (i.e. oversized) with respect to those used in grippers of normally closed type.
-
DE 3339977 discloses a device for fastening a spool carrier to a shaft, comprising gripping elements which can be displaced radially outwards via rollers, said gripping elements being displaceable to a clamping position via stop surfaces for the spool carrier and being retracted by pressing on a central release button. The stop surface for the spool core is designed as a concentric, axially displaceable ring, which interlocks with a support of the release button alternately in the rear clamping position and the front release position. - The object of the present invention is to produce a normally open expansion gripper that requires a limited force to take it from the open position to the closed position.
- In detail, the object of the present invention is to produce an expansion gripper in which the gripping elements are moved by low friction sliding means.
- The aforesaid objects are achieved by an expansion gripper for supporting reels comprising a hollow shaft, at one end of which there is produced a hub, a sleeve mounted to slide along an axis on said hub with a first inner portion and a second outer portion, mutually coaxial, said sleeve being connected integral with a rod housed inside the shaft; a liner connected integral with the hub, provided with a plurality of through openings adapted to house inserts that act as gripping elements of the gripper, said second portion being provided with through openings adapted to house the same number of rolling means interposed between the outer surface of said hub and the lower surface of said inserts, said surfaces being provided with profiles adapted to cooperate with said rolling means to control the movement of said inserts from a closed position in which they are retracted inside the outline of the liner to an open position in which they project from said liner.
- The gripper according to the present invention further comprises:
- elastic means housed in the first inner portion of the sleeve, interposed between a bottom of said first portion and a cover integral with the liner, said elastic means acting on said second portion of the sleeve, said elastic means taking said second portion to a position in which the rolling means are aligned with ridges of the profiles, i.e. in which the inserts are in the open position; wherein said rod being able to slide along the axis to oppose the force of said elastic means and taking said second portion of the sleeve to a position in which the rolling means are aligned with recesses of the profiles, i.e. in which the inserts are in the closed position.
- Further characteristics and advantages will be more apparent from the indicative, and therefore non-limiting, description of an example of a preferred but not exclusive embodiment of the invention, as shown in the accompanying figures wherein:
-
Fig. 1 is a partly sectional perspective view of a gripper in open position, according to the invention; -
Fig. 2 is a partly sectional perspective view of a gripper in closed position, according to the invention; -
Fig. 3 is an exploded perspective view of a gripper according to the invention; -
Fig. 4 is a sectional view of a gripper in open position according to the invention; -
Fig. 5 is a sectional view of a gripper in closed position according to the invention; -
Figs. 6a, 6b and 6c are respectively a perspective, a side sectional and a front sectional view of the shaft of the gripper according to the invention; -
Fig. 7 is a perspective view of the second portion of the sleeve of the gripper according to the invention; -
Figs. 8a and 8b are respectively a perspective and side view of an insert of the gripper according to the invention; - With reference to the accompanying figures, the expansion gripper, indicated as a whole with 1, comprises a hollow shaft, at one end of which there is produced a
hub 3, preferably with a cylindrical section, defining a cavity 4, also preferably cylindrical (Fig.3 ). - On said
hub 3 there is mounted, to slide along the axis X of theshaft 2, a sleeve, indicated as a whole with 5. Saidsleeve 5 has two cylindrical and coaxial portions produced in two parts integral with each other, or produced in a single element. In detail, said sleeve comprises a firstinner portion 6 sliding in contact with the inner surface of the cavity 4 and a secondouter portion 7 sliding in contact with the outer surface of thehub 3. - A
liner 8, connected integral with thehub 3, is placed around said secondouter portion 7 of thesleeve 5. - In practice, the second
outer portion 7 of thesleeve 5 slides between the outer surface of thehub 3 and the inner surface of theliner 8. - Said
liner 8 is provided with a plurality of throughopenings 9 which define the same number of seats adapted to house inserts, indicated as a whole with 10, which act as gripping elements of the gripper. - Said
inserts 10 are movable radially, sliding in theseats 9, from a closed position, in which they retract inside the contour of theliner 8, to an open position, in which they project from saidliner 8 to engage a tubular core of a reel (not shown in the figure). - According to a preferred embodiment, said
inserts 10 have a parallelepiped shape elongated in the direction X and tapered at the ends. - Preferably, the upper surface of said
inserts 10 is provided with knurling or the like to promote friction on the surface of the tubular core of the reel. - Said
inserts 10 are preferably arranged on theliner 8 spaced angularly equidistant from one another and their number can vary according to the dimensions of the gripper; preferably at least 4 inserts are provided, spaced equidistant from one another by 90 degrees. - One feature of the invention is that of providing for movement of said
inserts 10 from the closed position to the open position, and vice versa, through low friction rolling means. - According to a preferred variant, said rolling means comprise a plurality of
balls 13 adapted to cooperate withprofiles hub 3 and on the lower surface of theinserts 10. - In more detail, said profiles comprise ridges 11a and 12a, alternated with
recesses - According to a preferred embodiment, on the outer surface of the
hub 3 and on the lower surface of the inserts there are produced a plurality of adjacent incisions, having a conical profile, which define said ridges and recesses. - The
balls 13 are instead housed in the same number of throughopenings 14, produced in thesecond portion 7 of thesleeve 5. - Following sliding of said
sleeve 5 along the axis X, saidballs 13 can be in contact with theprofiles recesses - In particular, when the
balls 13 are aligned with the ridges 11a and 12a their dimension is such as to thrust theinserts 10 beyond the outer surface of theliner 8, i.e. in the open position. - Alternatively, said rolling means can comprise rollers arranged with their axis perpendicular to the axis X of the
shaft 2 so as to be able to roll on saidprofiles second portion 7 of thesleeve 5. - Said translation of the
second portion 7 of thesleeve 5 is controlled by arod 15 that operates to oppose the force of elastic means, indicated with 16 in the figure. - In detail, said rod is integral with the
first portion 6 of thesleeve 5 through which it also draws thesecond portion 7. - The
elastic means 16 are instead interposed between acover 17, connected integral with one end of theliner 8, and thebottom 18 of the firstinner portion 6 of thesleeve 5. - By pressing on the
bottom 18 of thefirst portion 6, said elastic means ensure that thesecond portion 7 also remains in a retracted position in which theballs 13 are aligned with the ridges 11a and 12a of theprofiles inserts 10 are projecting from the outer surface of theliner 8, i.e. in open position. - According to a preferred embodiment, said
elastic means 16 comprise an assembly of spring washers, positioned inside thefirst portion 6 of the sleeve, which ensure high rigidity and low cost. - The
rod 15, mounted sliding inside theshaft 2, extends from the cavity 4 of thehub 3 to beyond the end of said shaft to be able to be operated from the outside on a projecting portion 15b thereof. - Preferably said
rod 15 is also provided with astop 19 interposed between the elastic means 16 and the bottom 18 of theinner portion 6 of thesleeve 5. - In this way, by exerting a force on the portion 15b of the
rod 15 along the axis X directed toward thehub 3, thestop 19 compresses said elastic means 16 against thecover 17, drawing the sleeve with it toward saidcover 17. - In this way the
second portion 7 can also translate to a position in which theballs 13 are aligned with therecesses profiles inserts 10 can thus retract inside in the contour of theliner 8. - To ensure complete retraction of the
inserts 10 from the open position to the closed position, there are provided return means, indicated as a whole with 20, comprising elastic means or the like. - In detail, said return means 20 comprise torsion springs housed on
pins 21 inserted in theliner 8 and arranged parallel to the axis X. - Said springs are provided with projecting ends 22 housed in
seats 23 produced in the sides of the inserts 10 (Fig. 8 ). - Said springs 20 are mounted with a preload so that, when the
rod 15 is operated and theballs 13 are aligned with therecesses inserts 10 toward the inside of the gripper until they are taken to a position in which they are not projecting from the outer surface of theliner 8. - With the present invention it is thus possible to produce a system for movement of the inserts that does not require the use of sliding parts subject to high friction forces.
- In particular, movement of the
inserts 10 controlled through theballs 13 that cooperate withprofiles - In fact, the
balls 13 can roll on saidprofiles rod 15 to be utilized to compress theelastic means 16. - The gripper thus produced, normally open, can be taken to the closed position by acting on the
rod 15 with a limited force, comparable with that required to operate the normally closed grippers according to the prior art. - Several changes and variations can be made to the present invention as described and illustrated, within the scope of the claims.
Claims (7)
- An expansion gripper for supporting reels comprising:- a hollow shaft (2) at one end of which there is produced a hub (3);- a liner (8) connected integral with the hub (3), provided with a plurality of through openings (9) adapted to house inserts (10) that act as gripping elements of the gripper;characterised by further comprising:- a sleeve (5) mounted to slide along an axis (X) on said hub (3) with a first inner portion (6) and a second outer portion (7), mutually coaxial, said sleeve (5) being connected integral with a rod (15) housed inside the shaft (2); said second portion (7) being provided with through openings (14) adapted to house the same number of rolling means (13) interposed between the outer surface of said hub (3) and the lower surface of said inserts (10); said surfaces being provided with profiles (11, 12) adapted to cooperate with said rolling means (13) to control the movement of said inserts (10) from a closed position, in which they retract inside the contour of the liner (8), to an open position, in which they project from said liner (8);- elastic means (16) housed in the first inner portion (6) of the sleeve (5), interposed between a bottom (18) of said first portion (6) and a cover (17) integral with the liner (8), said elastic means (16) acting on said second portion (7) of the sleeve (5), said elastic means taking said second portion (7) to a position in which the rolling means are aligned with ridges (11a, 12a) of the profiles (11, 12), i.e. in which the inserts (10) are in the open position;wherein said rod (15) being able to slide along the axis (X) to oppose the force of said elastic means (16) and taking said second portion (7) of the sleeve (5) to a position in which the rolling means are aligned with recesses (11b, 12b) of the profiles (11, 12), i.e. in which the inserts (10) are in the closed position.
- The expansion gripper according to claim 1, characterized in that said profiles (11, 12) produced respectively on the outer surface of said hub (3) and on the lower surface of said inserts (10) comprise ridges (11a, 12a) alternated with the recesses (11b, 12b).
- The expansion gripper according to claim 1 or 2, characterized in that said rolling means (13) are balls.
- The expansion gripper according to claim 1 or 2, characterized in that said rolling means (13) are rollers arranged with their axis perpendicular to the axis (X).
- The expansion gripper according to claim 3, characterized in that said profiles (11, 12) are composed of a plurality of adjacent incisions of conical shape.
- The expansion gripper according to any one of the preceding claims from 2 to 5, characterized in that there are provided return means adapted to enable complete retraction of the inserts (10) inside the contour of the liner (8) when the rolling means (13) are aligned with the recesses (11b, 12b) of the profiles (11, 12).
- The expansion gripper according to claim 6, characterized in that said return means comprise torsion springs (20) housed on pins (21) housed in the liner (8) and arranged parallel to the axis (X), said springs being provided with projecting ends (22) housed in seats (23) produced in the sides of the inserts (10).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12199120.2A EP2634128B1 (en) | 2012-02-28 | 2012-12-21 | Expansion mandrel for coils |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12157370 | 2012-02-28 | ||
IT000010A ITPC20120010A1 (en) | 2012-02-28 | 2012-04-19 | EXPANSION CLAMP FOR COILS |
EP12199120.2A EP2634128B1 (en) | 2012-02-28 | 2012-12-21 | Expansion mandrel for coils |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2634128A2 EP2634128A2 (en) | 2013-09-04 |
EP2634128A3 EP2634128A3 (en) | 2014-07-09 |
EP2634128B1 true EP2634128B1 (en) | 2019-07-24 |
Family
ID=46832950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12199120.2A Not-in-force EP2634128B1 (en) | 2012-02-28 | 2012-12-21 | Expansion mandrel for coils |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2634128B1 (en) |
IT (1) | ITPC20120010A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US537789A (en) * | 1895-04-16 | Spool or mandrel | ||
US2908452A (en) * | 1955-06-15 | 1959-10-13 | H G Weber & Company Inc | Automatic expanding shaftless chuck |
DE1205792B (en) * | 1961-01-25 | 1965-11-25 | Sperry Rand Corp | Device for fastening a reel carrier, in particular for magnetic tapes, on a shaft |
US3472524A (en) * | 1965-10-11 | 1969-10-14 | Henry J Mansell | Chuck construction |
DE2815310C2 (en) * | 1978-04-08 | 1982-06-16 | Jagenberg-Werke AG, 4000 Düsseldorf | Clamping head for winding cores |
US4433814A (en) * | 1983-04-14 | 1984-02-28 | Double E Company Inc. | Core-engager retainer for an expansible shaft |
DE3339977A1 (en) * | 1983-11-04 | 1985-05-15 | Agfa-Gevaert Ag, 5090 Leverkusen | Device for fastening a spool carrier |
US6533214B1 (en) * | 2000-04-25 | 2003-03-18 | Guttin Christian Sarl | Device to support and drive a winding bar or tube-shaped spindle, in order to roll or unroll bolts of fabric |
-
2012
- 2012-04-19 IT IT000010A patent/ITPC20120010A1/en unknown
- 2012-12-21 EP EP12199120.2A patent/EP2634128B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
ITPC20120010A1 (en) | 2013-08-29 |
EP2634128A2 (en) | 2013-09-04 |
EP2634128A3 (en) | 2014-07-09 |
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