CA2144623A1 - Strip severing and transfer arrangement - Google Patents
Strip severing and transfer arrangementInfo
- Publication number
- CA2144623A1 CA2144623A1 CA002144623A CA2144623A CA2144623A1 CA 2144623 A1 CA2144623 A1 CA 2144623A1 CA 002144623 A CA002144623 A CA 002144623A CA 2144623 A CA2144623 A CA 2144623A CA 2144623 A1 CA2144623 A1 CA 2144623A1
- Authority
- CA
- Canada
- Prior art keywords
- guide plate
- arrangement
- insertion strip
- blow
- strip
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/04—Paper-break control devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/18—Drying webs by hot air
- D21F5/185—Supporting webs in hot air dryers
- D21F5/187—Supporting webs in hot air dryers by air jets
- D21F5/188—Blowing devices
Abstract
A strip severing and transfer arrangement for an insertion strip to be threaded into a machine for manufacturing or processing of a web, comprises a pivotally supported guide plate having a transfer edge for guiding the insertion strip, a first blow element for applying an air blast to the top surface of the guide plate facing the insertion strip, a severing means and a second blow element in the region of the transfer edge of the guide plate, across which the insertion strip runs off the guide plate at a rear side of the guide plate facing away from the insertion strip for producing air flow which flows out across the transfer edge of the guide plate.
The insertion strip is optimally guided at high speeds at the start of the threading process, without fluctuations and lateral offset, permitting precise separation or severance. The front edge of the insertion strip is accurately guided during the transfer to the follow-on arrangements, be it a guide-plate or rope shears, so that the threading process of the fed insertion strip can be assured with a very high degree of certainty.
The insertion strip is optimally guided at high speeds at the start of the threading process, without fluctuations and lateral offset, permitting precise separation or severance. The front edge of the insertion strip is accurately guided during the transfer to the follow-on arrangements, be it a guide-plate or rope shears, so that the threading process of the fed insertion strip can be assured with a very high degree of certainty.
Description
- ~_ 21~46Z3 A STRIP SEVERING AND TRANSFER ARRANGEMENT
FIELD OF THE INVENTION
The present invention relates generally to a strip severing and transfer arrangement for an insertion strip which is to be threaded into a machine for manufacture or processing of a web, such as a paper web.
BACKGROUND OF THE INVENTION
Arrangements for threading paper web into a paper manufacturing or processing-machine are known. In view of the large width of the paper web, it is usually impossible to thread a paper web into the machine across the entire width of the web. Therefore, an insertion strip is cut off the web and is inserted into the paper manufacturing or processing machine, which subsequently draws the entire width of the paper web behind itself. The threading process takes place at the start of the papèr machine or after a rupture of the web.
The strip severing and transfer arrangement can be positioned at any random point in the paper machine. For instance, it can be positioned at the end of the drying part or between a calender and the paper rewinding device.
At the start of the threading process, the insertion strip travels over the strip severing and transfer arrangement. To begin with, the insertion strip must be partitioned, this means it must be severed. The front end of the insertion strip is then threaded into the paper machine NY2 - 30206 . 1 and can then, as explained, pull the paper web behind itself.
An aspect of the arrangement is that the threading process is performed at the full, mostly very high operating speed, which, for instance, can be between approximately 1,500 m/min and 2,000 m/min.
It has been observed however that the insertion strip is not optimally guided in conventional arrangements of the type discussed here, so that (1) in the course of the severance no definite front edge is formed, (2) the threading process is fraught with problems and ~3) frequently fails. In addition, the severed strip can often not be correctly received by the follow-on devices, so that the threading process fails.
It is therefore an object of the invention to create a strip severing and transfer arrangement which enables optimal guidance of the insertion strip.
Another object of the invention is the optimal guidance of the insertion strip so that it can be severed and transferred to the follow-on arrangements in a defined manner so that a faultless threading-ln process is possible at high transfer speeds.
SUMMARY OF THE lNv~ oN
These and other objects of the invention are achieved by a strip severing and transfer arrangement 214~623 according to the present invention. In the arrangement, the insertion strip is optimally guided, also at high speeds, at the start of the threading process, without fluctuations and lateral offset. This permits precise separation or severance.
The front edge of the insertion strip is accurately guided during the transfer to the follow-on arrangements, be it a guide-plate or rope shears, so that the threading process of the fed insertion strip can be assured with a very high degree of certainty.
In a preferred embodiment of the arrangement, the pivot axis of the guide-plate receiving and transferring the insertion strip is defined by an air distribution tube. This results in compact construction of the arrangement with low weight and a especially simple transfer of the air supplied by an air-blow source, which is dispensed by blowers.
Furthermore, the preferred embodiment of the invention is distinguished in that second row of blow nozzles, which are associated with an air-distribution tube, are associated with air guide tubes. The air-guide tubes are disposed on the rear side of the guide plate, facing away from the insertion strip and terminate in blast-air outlets in the vicinity of its transfer edge. The blown air is thus carried directly to the transfer edge of the guide plate, so that an air-flow stabilizing the insertion strip is formed there.
Thus, the insertion strip is still accurately guided, even after leaving the guide plate and more securely severed in the NY2-30206 . 1 ~ 21~462~ -course of the severance process, as well as being reliably transferred to the following guidance devices.
In a preferred embodiment of the strip severing and transfer arrangement, the guide plate is linked to a scraper blade support of the paper machine. This support carries a scraper-blade, which, in the first place, serves to clean the outer surface of the roll or a cylinder associated with the scraper blade support during the operation of the paper machine or to remove the web from the roll in case of web rupture. By linking the guide plate directly with the existing scraper blade support, optimal accessibility to the paper machine is assured. Since the guide plate is pivotally linked to the scraper blade support, it can be brought into an inoperative position in which it rests completely on the scraper blade support and occupies very little space.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood by the Detailed Description of the Preferred Embodiment, in connection with the drawings, wherein:
Figure 1 shows a diagrammatic side view of a strip severing and transfer-arrangement;
Figure 2 shows a first operational position of the arrangement shown in Figure 1;
NY2-30206 . 1 - '_ 214462~
Figure 3 shows a second operational position of the arrangement;
Figure 4 shows a third operational position of the arrangement;
Figure 5 shows the strip severing and transfer arrangement in a transfer position;
Figure 6 depicts a side view of a second embodiment of strip severing and transfer-arrangement; and Figure 7 depicts the strip severing and transfer-arrangement of Figure 6 in transfer position.
DE~TTRn DESCRIPTION OF THE ~x~r~KKED
AND ALTERNATE EMBODIMENTS
Referring now to the drawings , wherein like numerals designate like elements throughout the several views, Figure 1 shows a side view of a strip severing and transfer arrangement, comprising a guide plate 3, also designated as a table plate, which is pivotally linked to a scraper blade support 5 of a paper manufacturing or processing machine, shown in outline. The pivot axis of the guide plate 3 is defined by an air distribution tube 9 retained by at least one support bracket 7, to which a gaseous medium, subjected to an excess pressure, preferably compressed air, is fed from a blow-air source. The scraper blade support carriers 5 has a NY2-30206 . 1 conventional scraper 11, also called a scraper blade, which helps remove the paper web from the roll 13 or a drying cylinder of the paper machine during the threading of a paper web into a paper machine (at the start of the same or after a paper rupture).
During normal manufacturing process, the paper web runs from the roll 13, directly to a paper guide roll 14 and from it along the line 2 to a follow-up device (not shown), for instance to a calender. During the threading process, an insertion strip 15 is cut off from one of the two edges of the paper web, for instance by a tip cutter (not shown) here. The course of the insertion strip 15 is shown by a continuous line, while the strip 15 is transferred by the arrangement 1 from the roll 13 to the follow-on arrangements of the paper machine. As indicated by a dotted line, the insertion strip 15 is directed, to begin with, by the scraper blade 11 towards the bottom, if the arrangement 1, is inoperative, which is also shown by dotted lines. In this inactivated state of the arrangement 1, the guide plate 3 is pivoted towards the bottom, around the air distribution tube 9 serving as a pivot axis and lies tightly at the scraper blade support 5.
The guide plate 3 is essentially V-shaped, wherein the bend line extends vertically into the plane of the figure.
The two legs of the guide plate 3, bent in V-shape, form an obtuse angle whose first leg is attached to the air distribution tube 9 and whose second leg extends away from the NY2-30206 . 1 6 '- 2144623 air distribution tube 9, proceeding from the bend line. In the transition region of the two legs of the guide plate 3, an actuation arrangement, consisting of a piston-cylinder unit 17, is engaged with its first end at a bearing 18, while its second end is fastened at the scraper blade support 5, by an abutment support bracket 19.
In the actuated position of the piston cylinder unit 17, the piston is driven out of the cylinder so that the guide plate 3 is brought, against the effect of gravity, into the position shown by a continuous line in Figure 1. In the non-actuated position, the cylinder is driven over the piston of the piston cylinder unit 17, so that the guide plate 3 is now located in its downwardly pivoted position, shown here by a broken line. In the non-actuated position, the spacing A of the first bearing 18 relative to a line 20, extending parallel to the longitudinal axis of the piston-cylinder unit 17 and intersecting the pivot axis of the air distribution tube 9, is smaller than when the bearing 18 is approximately at the same level as the air distribution tube 9. This position is established in the transfer position of the arrangement 1 shown in Figure 4. It is assured, in this way, that the guide plate 3, in its non-actuated position, rests closely at the surface of the scraper blade support 5 and occupies little space. It is possible to design the piston cylinder unit 17 to be double-acting, so that the guide plate 3 is displaced into its non-actuated position by the force of the piston cylinder unit 17 acting upon it. It is also conceivable, to NY2-30206.1 '- 214~62~
-obtain the non-actuated position by the action of a flexural element which presses the guide plate 3 downwards and assures that the piston is pushed into the cylinder of the piston cylinder unit 17, if no working medium (for instance air) is supplied to the piston cylinder unit 17.
The air distribution tube 9 comprises a first row of blow nozzles 21, which are disposed along an imaginary line extending in the direction of the air distribution tube 9 and whose blow-out apertures are located close to the front side of the guide plate 3, facing the insertion strip 15. The air distribution tube 9 is provided with a second row of blow nozzles, which discharge respectively into an air guide tube 23 and which are disposed on the rear side of the guide plate 3, facing away from the insertion strip 15. The ends of the air distribution tube 23, facing away from the air distribution tube 9, form blow air outlets 25 which open in the direct vicinity of a transfer edge 27 of the guide plate 3. While the one longitudinal edge of the guide plate 3 is attached at the air distribution tube 9, its oppositely located longitudinal edge is configured as a transfer edge 27, which moves along a circular line K, shown in Figure 1 by broken lines in the course of a pivoting movement of the guidance plate 3, with the center of the circular line K, coinciding with the pivot axis formed by the air distribution tube 9.
The blow air outlets 2S are disposed and oriented in NY2-30206 . 1 8 - 214~623 such a way that air flowing out of them exlts along an imaginary extension line of the guidance plate 3 and is effective beyond its transfer edge 27.
As the air supplied by the air distribution tube 9 and exiting from the first blow air nozzles 21 flows tangentially against the front side of the guide plate 3, the air flow is applied to the front side and continues to flow along the front side in the conveyance direction of the insertion strip 15 because of the Coanda effect. A negative pressure due to the air flow at a certain speed is generated at the bottom side of the insertion strip 15 facing the front side of the guide plate 3, so that the insertion strip 15 lies on the front side of the guide plate 3 and is optimally guided by the same. This means that no fluctuation of the insertion strip 15 occurs. Secondly, the insertion strip 15 follows the feed motion without any lateral offset.
It is evident from Figure 1, that the insertion strip 15, coming from the roller 13, is transferred to the left by the guide plate 3 and is transferred to a counter guide plate 29, also called secondary table. In the embodiment of the arrangement 1 shown here, the counter guide plate 29 is pivotally supported. It can be pivoted out of an actuated position, shown in continuous lines in ~igure 1, into an inoperative position shown in broken lines, in which it essentially hangs vertically downward. A feed edge 31 is provided on the side of the counter guide plate 29, facing the NY2-30206 . 1 guide plate 3, which can be formed on a flat plate fastened to the counter guide plate 29, or be formed as an extension of the same, as shown in broken lines. Figure 1 also shows that the feed edge 31 can be formed by a plate 33, bent downwards and whose bent line is perpendicular to the plane of the drawing. The bent plate 33, forms an angle with the counter guide plate 29, which can be smaller, equal to or larger than 90. Thus, it can also be bent towards the rear, as indicated with a broken/dotted line in Figure 1. The transfer edge 27 also encloses, with the feed direction of the insertion strip 15, an angle equal to or smaller than 90.
The feeding edge 31 can also be configured in a toothed manner, so that the insertion strip 15 is reliably severed. Because of the taut guidance of the insertion strip 15 beyond the transfer edge 27, it is possible to space the transfer edge 27, serving as a severing edge, from the feed edge 31, so that larger tolerances are permissible and the adjusting wor~ can be easily performed during the assembly of the arrangement 1.
The transfer edge 27 of the guide plate 3 and the feed edge 31 of the counter guide plate 29, form separation elements of a cut-off arrangement designated also as a severing arrangement. In the course of a pivoting motion of the guide plate 3, an insertion strip 15, traveling across the transfer edge 27 and beyond and toward the bottom, is severed if the counter guide plate 29 is in the working position shown NY2-30206 . 1 '- 2144623 by solid lines in Figure 1.
A third blow element 35 is disposed near the feed edge 31, through which air is directed to the top side of the counter guide plate 29 facing the insertion strip 15. Blow nozzle 37 of the third blow element 35, assures that the air flows in the travel direction of the insertion strip 15 onto the counter guide plate 29 and thus accelerates and guides the insertion strip 15 in the travel direction.
As seen overall in Figure 1, the strip severing and transfer arrangement 1, comprises a pivotable guide plate 3, which cooperates with a counter guide plate 29 configured to be pivotable in this case, but basically also fastenable in a stationary manner. The two edges of the two plates facing one another, namely the transfer edge 27 of the guide plate 3 and the feed edge 31 of the counter guide plate 29, constitute a severing or cut-off arrangement, with which an insertion strip 15, traveling beyond the transfer edge 27 is sheared off from the bottom to the top, in the course of a pivoting movement of the guide plate 3.
As shown in Figure 1, the scraper blade support 5 can be equipped with an additional blow device, which comprises a fourth blow element 39 above the guide plate 3.
The fourth blow element 39 comprises a row of nozzles 41, which blow air approximately horizontally from the right side to the left side against the bottom side of the insertion NY2 - 3 0206 . 1 1 1 ~ 2144623 strip 15, so that the insertion strip is released smoothly from the scraper blade 11 and is transferred without forming creases to the front side of the guide plate 3.
The fourth blow element 39 can also comprise a row of blow nozzles (not shown) which blow air vertically towards the top, into the wedge-shaped gap formed by the scraper blade 11 and by the insertion strip 15 which is being released.
Compressed air can also be supplied to the nozzles of the row of nozzles 41 at the start of the pivoting motion of the guide plate 3 (indicated in Figure 3) to insure an optimal curve path of the insertion strip 15 and thus a secure guidance and transfer of the paper strip from the scraper blade 11 to the front side of the guide plate 3.
The fourth blow element 39 can be made pivotable and to comprise only one single row of nozzles which can blow air towards the top or on the left towards the side. The insertion strip 15, taken off the roll 13 by the strip severing and transfer arrangement I, is conducted further towards the left in Figure 1 and is passed-on to additional guidance devices. There, the insertion strip 15 is reliably guided by the air flow exiting from the third blow element 35 or its blow nozzles 37, so that a crease-free and smooth conveyance of the insertion strip 15 is assured.
In order to assure a guided transfer of the insertion strip 15 by the counter guide plate 29 to another NY2-30206 . 1 '- 2144623 guidance device, the pivot axis of the counter guide plate 29 is also defined by an air distribution tube 43 which is provided with a row of blow nozzles 45 which permit air to exit in the conveyance direction of the insertion strip 15.
How the severed insertion strip 15, taken over by the counter guide plate 29, is passed-on is immaterial for the functioning of the arrangement shown here further. Instead of the guidance devices mentioned here, which are constructed similar to the counter guide plate 29, it is also possible to provide rope shears which accept and move along the insertion strip 15 coming from the arrangement 1.
The mode of operation of the strip severing and transfer arrangement 1 will now be explained, particularity with reference to Figures 2 through 5. When putting a paper machine into operation and after a web ruptures, it is necessary to pass along a paper web taken off a roll 13 to subsequent parts of the paper machine. For this purpose, to begin with, an edge strip, which is cut off the paper web, constitutes the insertion strip 15.
Prior to putting the arrangement 1 into operation, the paper web travels, together with the insertion strip 15, under the influence of gravity from the scraper blade 11 towards the bottom. The guide plate 3 is in its non-activated position and is in close contact with the scraper blade support 5. The counter guidance plate 29 can already be ~2-30206 1 13 ~_ 2144623 actuated and is oriented in direction toward the guide plate 3.
In the functional position of the arrangement 1 shown in Figure 2, the insertion strip 15 travels without any sort of guidance towards the bottom; it is subjected to fluctuation and a lateral displacement of the strip is also possible.
It is evident from Figure 3 that, to begin with, blow air is introduced into the air distribution tube 9 for stabilizing and guiding the insertion strip 15, so that air from the row of the first blow nozzles 21, flows along the front side of the guide plate 3. The already mentioned negative pressure is generated by the air flow running in conveyance direction of the insertion strip 15, so that the insertion strip 15 comes into contact with the front side of the guide plate 3 and no longer performs any fluctuations. A
lateral displacement is also excluded.
The stabilization of the insertion strip 15 occurs also beyond the guide plate 3, thus beyond the transfer edge 27, due to the air flowing out toward the rear side of the guide plate. The air flows out of the blow air outlets over the transfer edge 27 in the direction of the guide plate 3.
After the insertion strip 15 has become stabilized on the top surface of the guide plate 3, the piston cylinder NY2-30206 . 1 ~_ 21~4623 unit 17 is activated (as indicated in Figure 4). The guide plate 3, as shown in Figure 4, is in an intermediate position between the inactive and the transfer or working position shown Figure 1.
The guide plate 3 is displaced, preferably by fits and starts, by the piston cylinder unit 17 into the transfer position. The air flowing out of the bottom side of the guide plate 3, keeps the paper strip taut, even beyond the transfer edge 27 and also during the pivoting process. The insertion strip 15 is knocked off or severed or perforated and torn-off by cooperation of the transfer edge 27 with the feed edge 31, thus by the severing arrangement. The new starting end of the insertion strip 15 is received by the counter guide plate 29 and is accurately guided and passed on by the air flow exiting from the blow nozzles 27.
As seen in Figure -5, the portion of the insertion strip 15, severed during the pivoting motion of the guide plate 3 which sometimes measures several hundred meters, travels downwards, for instance into the cellar and falls off in its entirety and no longer interferes with the transfer process, while the new front end of the insertion strip 15, formed by the severance process, is passed on to the counter guide plate 29 and is guided there.
The blow nozzles 37 can be disposed in such a way on the counter guide plate 29, that the insertion strip 15 is ~2-30206 1 15 '- 2144623 -passed-on in a straight line to additional guidance devices or is offset laterally and diverted into a rope shear which assumes the ensuing conveyance.
The strip severing and transfer arrangements 1 can be used everywhere, where, once a paper machine is started, a paper web has to be threaded in. It is thus conceivable to provide such arrangements between individual groups, preferably at the end of a drying portion, but upstream and within additional segments of a paper manufacturing or processing machine.
It is particularly advantageous that the guide plate 3 can be fastened at a scraper blade support 5, thus not requiring its own fastening or attachment provisions, which would complicate the access to the paper machine. It is insured by the pivotability of the guide plate 3 that service asslgnments can be performed on the paper machine without any interference, especially if the counter guide plate 29 is also designed to be pivotable, the access to the arrangement 1, if needed, is possible without any hindrance.
Because of the relatively small distance A in the non-actuated position of the guide plate 3, it is achieved that the piston-cylinder unit 17 moves the guide plate 3 slowly from the non-actuated position shown in Figure 2, into the position, shown in Figure 4. Here, the distance or spacing between the bearing 18 and the line 20 is considerably NY2-30206 . 1 '- 21~4623 greater than previously, so that the guide plate 3 is now pivoted by fits and starts past the feed edge 31 of the counter guide plate 29 to assure reliable severing of the insertion strip 15. A distinct spacing can remain between the transfer edge 27 and the feed edge 31, meaning between the end or the severance edges of the severing arrangement. Since the insertion strip 15 is kept taut by the air flow also beyond the transfer edge 27, the insertion strip 15 is reliably severed upon passing the feed edge 31, serving as a severing or tear-off edge. The free end of the insertion strip 15 is then safely conducted to the counter guide plate 29 by the air flow from the blast-air outlets 25 and arrives into the guidance region of the third blow element 35 or the blow nozzles 37.
Figures 6 and 7 show an additional embodiment of a strip severing and transfer arrangement, which essentially corresponds to the embodiment shown in Figure 1, wherein identical parts are designated with the same reference numerals. A description of these parts will therefore not be repeated. The sole difference from the first embodiment is in the third blow element 55 being disposed below the counter guide plate 29. The blow nozzles 57 are herein oriented downward, in the direction of the falling-off insertion strip.
The dotted view of the third blow element 35 in the original position is meant to indicate, that the top blow element can also be provided in addition to the bottom blow element 55.
NY2-30206.1 17 21~4623 -By arranging the third blow element 55 below the guide plate 29, its function is also changed. The third flow element 35, shown in the first embodiment, has the task of accelerating the insertion strip 15 or to convey it further on the guide plate.
The third blow element 55, disposed below the guide plate 29, serves to direct an air blast to the severed portion of the insertion strip 15, falling downward and to conduct it reliably away from the transfer edge 27. This prevents residual rags of the insertion strip 15 from being carried along on the second guide plate 29. Thus, the severance reliability can be increased.
The effect of the third blow element 55 is clarified in Figure 7. Due to a high blow velocity, the insertion strip 15 falling towards the bottom can be pulled towards the air flow and thus be removed from the effective range of the second blow element 25.
While the preferred and alternate embodiments of the invention have been shown and described in detail, modifications and adaptations may be made thereto, without departing form the spirit and scope of the invention, as delineated in the appended claims.
NY2-30206 . 1
FIELD OF THE INVENTION
The present invention relates generally to a strip severing and transfer arrangement for an insertion strip which is to be threaded into a machine for manufacture or processing of a web, such as a paper web.
BACKGROUND OF THE INVENTION
Arrangements for threading paper web into a paper manufacturing or processing-machine are known. In view of the large width of the paper web, it is usually impossible to thread a paper web into the machine across the entire width of the web. Therefore, an insertion strip is cut off the web and is inserted into the paper manufacturing or processing machine, which subsequently draws the entire width of the paper web behind itself. The threading process takes place at the start of the papèr machine or after a rupture of the web.
The strip severing and transfer arrangement can be positioned at any random point in the paper machine. For instance, it can be positioned at the end of the drying part or between a calender and the paper rewinding device.
At the start of the threading process, the insertion strip travels over the strip severing and transfer arrangement. To begin with, the insertion strip must be partitioned, this means it must be severed. The front end of the insertion strip is then threaded into the paper machine NY2 - 30206 . 1 and can then, as explained, pull the paper web behind itself.
An aspect of the arrangement is that the threading process is performed at the full, mostly very high operating speed, which, for instance, can be between approximately 1,500 m/min and 2,000 m/min.
It has been observed however that the insertion strip is not optimally guided in conventional arrangements of the type discussed here, so that (1) in the course of the severance no definite front edge is formed, (2) the threading process is fraught with problems and ~3) frequently fails. In addition, the severed strip can often not be correctly received by the follow-on devices, so that the threading process fails.
It is therefore an object of the invention to create a strip severing and transfer arrangement which enables optimal guidance of the insertion strip.
Another object of the invention is the optimal guidance of the insertion strip so that it can be severed and transferred to the follow-on arrangements in a defined manner so that a faultless threading-ln process is possible at high transfer speeds.
SUMMARY OF THE lNv~ oN
These and other objects of the invention are achieved by a strip severing and transfer arrangement 214~623 according to the present invention. In the arrangement, the insertion strip is optimally guided, also at high speeds, at the start of the threading process, without fluctuations and lateral offset. This permits precise separation or severance.
The front edge of the insertion strip is accurately guided during the transfer to the follow-on arrangements, be it a guide-plate or rope shears, so that the threading process of the fed insertion strip can be assured with a very high degree of certainty.
In a preferred embodiment of the arrangement, the pivot axis of the guide-plate receiving and transferring the insertion strip is defined by an air distribution tube. This results in compact construction of the arrangement with low weight and a especially simple transfer of the air supplied by an air-blow source, which is dispensed by blowers.
Furthermore, the preferred embodiment of the invention is distinguished in that second row of blow nozzles, which are associated with an air-distribution tube, are associated with air guide tubes. The air-guide tubes are disposed on the rear side of the guide plate, facing away from the insertion strip and terminate in blast-air outlets in the vicinity of its transfer edge. The blown air is thus carried directly to the transfer edge of the guide plate, so that an air-flow stabilizing the insertion strip is formed there.
Thus, the insertion strip is still accurately guided, even after leaving the guide plate and more securely severed in the NY2-30206 . 1 ~ 21~462~ -course of the severance process, as well as being reliably transferred to the following guidance devices.
In a preferred embodiment of the strip severing and transfer arrangement, the guide plate is linked to a scraper blade support of the paper machine. This support carries a scraper-blade, which, in the first place, serves to clean the outer surface of the roll or a cylinder associated with the scraper blade support during the operation of the paper machine or to remove the web from the roll in case of web rupture. By linking the guide plate directly with the existing scraper blade support, optimal accessibility to the paper machine is assured. Since the guide plate is pivotally linked to the scraper blade support, it can be brought into an inoperative position in which it rests completely on the scraper blade support and occupies very little space.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood by the Detailed Description of the Preferred Embodiment, in connection with the drawings, wherein:
Figure 1 shows a diagrammatic side view of a strip severing and transfer-arrangement;
Figure 2 shows a first operational position of the arrangement shown in Figure 1;
NY2-30206 . 1 - '_ 214462~
Figure 3 shows a second operational position of the arrangement;
Figure 4 shows a third operational position of the arrangement;
Figure 5 shows the strip severing and transfer arrangement in a transfer position;
Figure 6 depicts a side view of a second embodiment of strip severing and transfer-arrangement; and Figure 7 depicts the strip severing and transfer-arrangement of Figure 6 in transfer position.
DE~TTRn DESCRIPTION OF THE ~x~r~KKED
AND ALTERNATE EMBODIMENTS
Referring now to the drawings , wherein like numerals designate like elements throughout the several views, Figure 1 shows a side view of a strip severing and transfer arrangement, comprising a guide plate 3, also designated as a table plate, which is pivotally linked to a scraper blade support 5 of a paper manufacturing or processing machine, shown in outline. The pivot axis of the guide plate 3 is defined by an air distribution tube 9 retained by at least one support bracket 7, to which a gaseous medium, subjected to an excess pressure, preferably compressed air, is fed from a blow-air source. The scraper blade support carriers 5 has a NY2-30206 . 1 conventional scraper 11, also called a scraper blade, which helps remove the paper web from the roll 13 or a drying cylinder of the paper machine during the threading of a paper web into a paper machine (at the start of the same or after a paper rupture).
During normal manufacturing process, the paper web runs from the roll 13, directly to a paper guide roll 14 and from it along the line 2 to a follow-up device (not shown), for instance to a calender. During the threading process, an insertion strip 15 is cut off from one of the two edges of the paper web, for instance by a tip cutter (not shown) here. The course of the insertion strip 15 is shown by a continuous line, while the strip 15 is transferred by the arrangement 1 from the roll 13 to the follow-on arrangements of the paper machine. As indicated by a dotted line, the insertion strip 15 is directed, to begin with, by the scraper blade 11 towards the bottom, if the arrangement 1, is inoperative, which is also shown by dotted lines. In this inactivated state of the arrangement 1, the guide plate 3 is pivoted towards the bottom, around the air distribution tube 9 serving as a pivot axis and lies tightly at the scraper blade support 5.
The guide plate 3 is essentially V-shaped, wherein the bend line extends vertically into the plane of the figure.
The two legs of the guide plate 3, bent in V-shape, form an obtuse angle whose first leg is attached to the air distribution tube 9 and whose second leg extends away from the NY2-30206 . 1 6 '- 2144623 air distribution tube 9, proceeding from the bend line. In the transition region of the two legs of the guide plate 3, an actuation arrangement, consisting of a piston-cylinder unit 17, is engaged with its first end at a bearing 18, while its second end is fastened at the scraper blade support 5, by an abutment support bracket 19.
In the actuated position of the piston cylinder unit 17, the piston is driven out of the cylinder so that the guide plate 3 is brought, against the effect of gravity, into the position shown by a continuous line in Figure 1. In the non-actuated position, the cylinder is driven over the piston of the piston cylinder unit 17, so that the guide plate 3 is now located in its downwardly pivoted position, shown here by a broken line. In the non-actuated position, the spacing A of the first bearing 18 relative to a line 20, extending parallel to the longitudinal axis of the piston-cylinder unit 17 and intersecting the pivot axis of the air distribution tube 9, is smaller than when the bearing 18 is approximately at the same level as the air distribution tube 9. This position is established in the transfer position of the arrangement 1 shown in Figure 4. It is assured, in this way, that the guide plate 3, in its non-actuated position, rests closely at the surface of the scraper blade support 5 and occupies little space. It is possible to design the piston cylinder unit 17 to be double-acting, so that the guide plate 3 is displaced into its non-actuated position by the force of the piston cylinder unit 17 acting upon it. It is also conceivable, to NY2-30206.1 '- 214~62~
-obtain the non-actuated position by the action of a flexural element which presses the guide plate 3 downwards and assures that the piston is pushed into the cylinder of the piston cylinder unit 17, if no working medium (for instance air) is supplied to the piston cylinder unit 17.
The air distribution tube 9 comprises a first row of blow nozzles 21, which are disposed along an imaginary line extending in the direction of the air distribution tube 9 and whose blow-out apertures are located close to the front side of the guide plate 3, facing the insertion strip 15. The air distribution tube 9 is provided with a second row of blow nozzles, which discharge respectively into an air guide tube 23 and which are disposed on the rear side of the guide plate 3, facing away from the insertion strip 15. The ends of the air distribution tube 23, facing away from the air distribution tube 9, form blow air outlets 25 which open in the direct vicinity of a transfer edge 27 of the guide plate 3. While the one longitudinal edge of the guide plate 3 is attached at the air distribution tube 9, its oppositely located longitudinal edge is configured as a transfer edge 27, which moves along a circular line K, shown in Figure 1 by broken lines in the course of a pivoting movement of the guidance plate 3, with the center of the circular line K, coinciding with the pivot axis formed by the air distribution tube 9.
The blow air outlets 2S are disposed and oriented in NY2-30206 . 1 8 - 214~623 such a way that air flowing out of them exlts along an imaginary extension line of the guidance plate 3 and is effective beyond its transfer edge 27.
As the air supplied by the air distribution tube 9 and exiting from the first blow air nozzles 21 flows tangentially against the front side of the guide plate 3, the air flow is applied to the front side and continues to flow along the front side in the conveyance direction of the insertion strip 15 because of the Coanda effect. A negative pressure due to the air flow at a certain speed is generated at the bottom side of the insertion strip 15 facing the front side of the guide plate 3, so that the insertion strip 15 lies on the front side of the guide plate 3 and is optimally guided by the same. This means that no fluctuation of the insertion strip 15 occurs. Secondly, the insertion strip 15 follows the feed motion without any lateral offset.
It is evident from Figure 1, that the insertion strip 15, coming from the roller 13, is transferred to the left by the guide plate 3 and is transferred to a counter guide plate 29, also called secondary table. In the embodiment of the arrangement 1 shown here, the counter guide plate 29 is pivotally supported. It can be pivoted out of an actuated position, shown in continuous lines in ~igure 1, into an inoperative position shown in broken lines, in which it essentially hangs vertically downward. A feed edge 31 is provided on the side of the counter guide plate 29, facing the NY2-30206 . 1 guide plate 3, which can be formed on a flat plate fastened to the counter guide plate 29, or be formed as an extension of the same, as shown in broken lines. Figure 1 also shows that the feed edge 31 can be formed by a plate 33, bent downwards and whose bent line is perpendicular to the plane of the drawing. The bent plate 33, forms an angle with the counter guide plate 29, which can be smaller, equal to or larger than 90. Thus, it can also be bent towards the rear, as indicated with a broken/dotted line in Figure 1. The transfer edge 27 also encloses, with the feed direction of the insertion strip 15, an angle equal to or smaller than 90.
The feeding edge 31 can also be configured in a toothed manner, so that the insertion strip 15 is reliably severed. Because of the taut guidance of the insertion strip 15 beyond the transfer edge 27, it is possible to space the transfer edge 27, serving as a severing edge, from the feed edge 31, so that larger tolerances are permissible and the adjusting wor~ can be easily performed during the assembly of the arrangement 1.
The transfer edge 27 of the guide plate 3 and the feed edge 31 of the counter guide plate 29, form separation elements of a cut-off arrangement designated also as a severing arrangement. In the course of a pivoting motion of the guide plate 3, an insertion strip 15, traveling across the transfer edge 27 and beyond and toward the bottom, is severed if the counter guide plate 29 is in the working position shown NY2-30206 . 1 '- 2144623 by solid lines in Figure 1.
A third blow element 35 is disposed near the feed edge 31, through which air is directed to the top side of the counter guide plate 29 facing the insertion strip 15. Blow nozzle 37 of the third blow element 35, assures that the air flows in the travel direction of the insertion strip 15 onto the counter guide plate 29 and thus accelerates and guides the insertion strip 15 in the travel direction.
As seen overall in Figure 1, the strip severing and transfer arrangement 1, comprises a pivotable guide plate 3, which cooperates with a counter guide plate 29 configured to be pivotable in this case, but basically also fastenable in a stationary manner. The two edges of the two plates facing one another, namely the transfer edge 27 of the guide plate 3 and the feed edge 31 of the counter guide plate 29, constitute a severing or cut-off arrangement, with which an insertion strip 15, traveling beyond the transfer edge 27 is sheared off from the bottom to the top, in the course of a pivoting movement of the guide plate 3.
As shown in Figure 1, the scraper blade support 5 can be equipped with an additional blow device, which comprises a fourth blow element 39 above the guide plate 3.
The fourth blow element 39 comprises a row of nozzles 41, which blow air approximately horizontally from the right side to the left side against the bottom side of the insertion NY2 - 3 0206 . 1 1 1 ~ 2144623 strip 15, so that the insertion strip is released smoothly from the scraper blade 11 and is transferred without forming creases to the front side of the guide plate 3.
The fourth blow element 39 can also comprise a row of blow nozzles (not shown) which blow air vertically towards the top, into the wedge-shaped gap formed by the scraper blade 11 and by the insertion strip 15 which is being released.
Compressed air can also be supplied to the nozzles of the row of nozzles 41 at the start of the pivoting motion of the guide plate 3 (indicated in Figure 3) to insure an optimal curve path of the insertion strip 15 and thus a secure guidance and transfer of the paper strip from the scraper blade 11 to the front side of the guide plate 3.
The fourth blow element 39 can be made pivotable and to comprise only one single row of nozzles which can blow air towards the top or on the left towards the side. The insertion strip 15, taken off the roll 13 by the strip severing and transfer arrangement I, is conducted further towards the left in Figure 1 and is passed-on to additional guidance devices. There, the insertion strip 15 is reliably guided by the air flow exiting from the third blow element 35 or its blow nozzles 37, so that a crease-free and smooth conveyance of the insertion strip 15 is assured.
In order to assure a guided transfer of the insertion strip 15 by the counter guide plate 29 to another NY2-30206 . 1 '- 2144623 guidance device, the pivot axis of the counter guide plate 29 is also defined by an air distribution tube 43 which is provided with a row of blow nozzles 45 which permit air to exit in the conveyance direction of the insertion strip 15.
How the severed insertion strip 15, taken over by the counter guide plate 29, is passed-on is immaterial for the functioning of the arrangement shown here further. Instead of the guidance devices mentioned here, which are constructed similar to the counter guide plate 29, it is also possible to provide rope shears which accept and move along the insertion strip 15 coming from the arrangement 1.
The mode of operation of the strip severing and transfer arrangement 1 will now be explained, particularity with reference to Figures 2 through 5. When putting a paper machine into operation and after a web ruptures, it is necessary to pass along a paper web taken off a roll 13 to subsequent parts of the paper machine. For this purpose, to begin with, an edge strip, which is cut off the paper web, constitutes the insertion strip 15.
Prior to putting the arrangement 1 into operation, the paper web travels, together with the insertion strip 15, under the influence of gravity from the scraper blade 11 towards the bottom. The guide plate 3 is in its non-activated position and is in close contact with the scraper blade support 5. The counter guidance plate 29 can already be ~2-30206 1 13 ~_ 2144623 actuated and is oriented in direction toward the guide plate 3.
In the functional position of the arrangement 1 shown in Figure 2, the insertion strip 15 travels without any sort of guidance towards the bottom; it is subjected to fluctuation and a lateral displacement of the strip is also possible.
It is evident from Figure 3 that, to begin with, blow air is introduced into the air distribution tube 9 for stabilizing and guiding the insertion strip 15, so that air from the row of the first blow nozzles 21, flows along the front side of the guide plate 3. The already mentioned negative pressure is generated by the air flow running in conveyance direction of the insertion strip 15, so that the insertion strip 15 comes into contact with the front side of the guide plate 3 and no longer performs any fluctuations. A
lateral displacement is also excluded.
The stabilization of the insertion strip 15 occurs also beyond the guide plate 3, thus beyond the transfer edge 27, due to the air flowing out toward the rear side of the guide plate. The air flows out of the blow air outlets over the transfer edge 27 in the direction of the guide plate 3.
After the insertion strip 15 has become stabilized on the top surface of the guide plate 3, the piston cylinder NY2-30206 . 1 ~_ 21~4623 unit 17 is activated (as indicated in Figure 4). The guide plate 3, as shown in Figure 4, is in an intermediate position between the inactive and the transfer or working position shown Figure 1.
The guide plate 3 is displaced, preferably by fits and starts, by the piston cylinder unit 17 into the transfer position. The air flowing out of the bottom side of the guide plate 3, keeps the paper strip taut, even beyond the transfer edge 27 and also during the pivoting process. The insertion strip 15 is knocked off or severed or perforated and torn-off by cooperation of the transfer edge 27 with the feed edge 31, thus by the severing arrangement. The new starting end of the insertion strip 15 is received by the counter guide plate 29 and is accurately guided and passed on by the air flow exiting from the blow nozzles 27.
As seen in Figure -5, the portion of the insertion strip 15, severed during the pivoting motion of the guide plate 3 which sometimes measures several hundred meters, travels downwards, for instance into the cellar and falls off in its entirety and no longer interferes with the transfer process, while the new front end of the insertion strip 15, formed by the severance process, is passed on to the counter guide plate 29 and is guided there.
The blow nozzles 37 can be disposed in such a way on the counter guide plate 29, that the insertion strip 15 is ~2-30206 1 15 '- 2144623 -passed-on in a straight line to additional guidance devices or is offset laterally and diverted into a rope shear which assumes the ensuing conveyance.
The strip severing and transfer arrangements 1 can be used everywhere, where, once a paper machine is started, a paper web has to be threaded in. It is thus conceivable to provide such arrangements between individual groups, preferably at the end of a drying portion, but upstream and within additional segments of a paper manufacturing or processing machine.
It is particularly advantageous that the guide plate 3 can be fastened at a scraper blade support 5, thus not requiring its own fastening or attachment provisions, which would complicate the access to the paper machine. It is insured by the pivotability of the guide plate 3 that service asslgnments can be performed on the paper machine without any interference, especially if the counter guide plate 29 is also designed to be pivotable, the access to the arrangement 1, if needed, is possible without any hindrance.
Because of the relatively small distance A in the non-actuated position of the guide plate 3, it is achieved that the piston-cylinder unit 17 moves the guide plate 3 slowly from the non-actuated position shown in Figure 2, into the position, shown in Figure 4. Here, the distance or spacing between the bearing 18 and the line 20 is considerably NY2-30206 . 1 '- 21~4623 greater than previously, so that the guide plate 3 is now pivoted by fits and starts past the feed edge 31 of the counter guide plate 29 to assure reliable severing of the insertion strip 15. A distinct spacing can remain between the transfer edge 27 and the feed edge 31, meaning between the end or the severance edges of the severing arrangement. Since the insertion strip 15 is kept taut by the air flow also beyond the transfer edge 27, the insertion strip 15 is reliably severed upon passing the feed edge 31, serving as a severing or tear-off edge. The free end of the insertion strip 15 is then safely conducted to the counter guide plate 29 by the air flow from the blast-air outlets 25 and arrives into the guidance region of the third blow element 35 or the blow nozzles 37.
Figures 6 and 7 show an additional embodiment of a strip severing and transfer arrangement, which essentially corresponds to the embodiment shown in Figure 1, wherein identical parts are designated with the same reference numerals. A description of these parts will therefore not be repeated. The sole difference from the first embodiment is in the third blow element 55 being disposed below the counter guide plate 29. The blow nozzles 57 are herein oriented downward, in the direction of the falling-off insertion strip.
The dotted view of the third blow element 35 in the original position is meant to indicate, that the top blow element can also be provided in addition to the bottom blow element 55.
NY2-30206.1 17 21~4623 -By arranging the third blow element 55 below the guide plate 29, its function is also changed. The third flow element 35, shown in the first embodiment, has the task of accelerating the insertion strip 15 or to convey it further on the guide plate.
The third blow element 55, disposed below the guide plate 29, serves to direct an air blast to the severed portion of the insertion strip 15, falling downward and to conduct it reliably away from the transfer edge 27. This prevents residual rags of the insertion strip 15 from being carried along on the second guide plate 29. Thus, the severance reliability can be increased.
The effect of the third blow element 55 is clarified in Figure 7. Due to a high blow velocity, the insertion strip 15 falling towards the bottom can be pulled towards the air flow and thus be removed from the effective range of the second blow element 25.
While the preferred and alternate embodiments of the invention have been shown and described in detail, modifications and adaptations may be made thereto, without departing form the spirit and scope of the invention, as delineated in the appended claims.
NY2-30206 . 1
Claims (14)
1. A strip severing and transfer arrangement for an insertion strip to be threaded into a machine for manufacturing or processing of a web, said arrangement comprising:
a pivotally supported guide plate for guiding the insertion strip, said guide plate having a transfer edge;
a first blow element for applying an air blast to a top surface of the guide plate facing the insertion strip;
severing means comprising at least one severing element; and a second blow element (23, 25) provided in a region of a transfer edge (27) of the guide plate (3), across which the insertion strip (15) runs off the guide plate (3) at a rear side of the guide plate (3) facing away from the insertion strip (15) for producing air flow which flows out across the transfer edge (27) of the guide plate (3).
a pivotally supported guide plate for guiding the insertion strip, said guide plate having a transfer edge;
a first blow element for applying an air blast to a top surface of the guide plate facing the insertion strip;
severing means comprising at least one severing element; and a second blow element (23, 25) provided in a region of a transfer edge (27) of the guide plate (3), across which the insertion strip (15) runs off the guide plate (3) at a rear side of the guide plate (3) facing away from the insertion strip (15) for producing air flow which flows out across the transfer edge (27) of the guide plate (3).
2. The arrangement of claim 1, wherein the guide plate has a pivot axis defined by an air distribution tube (9).
3. The arrangement of claim 2, wherein the air distribution tube (9), comprises:
a first row of blow nozzles forming first blow element (21); and, a second row of blow nozzles forming second blow element (23,25).
a first row of blow nozzles forming first blow element (21); and, a second row of blow nozzles forming second blow element (23,25).
4. The arrangement of claim 3, wherein a second row of blow nozzles is associated with an air guide tube, and wherein air guide tubes (23) are disposed at a rear side of the guide plate (3) and terminate in air blow outlets (25) near transfer edge (27) of the guide plate (3).
5. The arrangement of claim 1, wherein a second severing element of the severing means is one of being disposed at a feed edge (31) of a counter guide plate (29) cooperating with the guide plate (3) and being formed by the feed edge (3).
6. The arrangement of claim 5, wherein the counter guide plate (29) is pivotable and projects, in a working position, into a pivoting range of the guide plate (3).
7. The arrangement of claims 6, wherein the counter guide plate (29) is bent in a region of the feed edge (31).
8. The arrangement of claims 6, wherein the counter guide plate (29) is bent towards rear in the region of the feed edge (31).
9. The arrangement of claims 8, wherein a bent line of at least one of the bent region of the counter guide plate (29) and the feed edge (31) of the counter guide plate (29) encloses an angle equal to or smaller than 90° with a travel direction of the insertion strip (15).
10. The arrangement of claims 9, wherein the feed edge (31) is provided with teeth.
11. The arrangement of claims 10, further comprising a third blow element (35, 37; 55, 57) provided behind the feed edge (31) and at least one of below and above the counter guide plate (29) viewed in the traveling direction of the insertion strip (15).
12. The arrangement of claims 11, wherein the guide plate (3) is linked to scraper doctor blade support (5) of the paper machine.
13. The arrangement of claims 12, wherein a pivoting device of the guide plate (3) is fastened to the scraper blade support (5) of the paper machine and, preferably, comprises a piston-cylinder unit (17).
14. The arrangement of claim 13, further comprising a fourth blow element (39, 41) for applying air flow to the insertion strip (15) prior to the insertion strip reaching the guide plate (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4409660A DE4409660A1 (en) | 1994-03-21 | 1994-03-21 | Tail cutting and feeding device |
| DEP4409660.7 | 1994-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2144623A1 true CA2144623A1 (en) | 1995-09-22 |
Family
ID=6513391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002144623A Abandoned CA2144623A1 (en) | 1994-03-21 | 1995-03-14 | Strip severing and transfer arrangement |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0674045A3 (en) |
| JP (1) | JPH07323946A (en) |
| KR (1) | KR950032888A (en) |
| BR (1) | BR9500955A (en) |
| CA (1) | CA2144623A1 (en) |
| DE (1) | DE4409660A1 (en) |
| FI (1) | FI951291A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6394331B1 (en) | 1999-06-29 | 2002-05-28 | Voith Sulzer Papiertechnik Patent Gmbh | Device and process for separating and transferring a leader strip |
| WO2009063132A1 (en) * | 2007-11-14 | 2009-05-22 | Metso Paper, Inc. | A method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19537173C1 (en) * | 1995-10-06 | 1996-12-19 | Voith Sulzer Papiermasch Gmbh | Insertion strip cutter for paper length |
| CA2208381A1 (en) * | 1997-06-20 | 1998-12-20 | Roman C. Caspar | Apparatus for cutting and threading a tail of a travelling web in a papermaking machine |
| DE10009897A1 (en) * | 2000-03-01 | 2001-09-06 | Voith Paper Patent Gmbh | Scraper for the roller surface at a machine for the production or finishing of paper or cardboard or tissue has a box with perforations at the cover to trap and catch separated dirt and debris |
| DE10031644A1 (en) * | 2000-06-29 | 2002-01-17 | Voith Paper Patent Gmbh | Assembly to move the transfer strip of a paper/cardboard web between machine sections has a second guide plate at the entry to the conveyor, parallel to it, to control its movements and prevent flutter |
| DE10045141A1 (en) * | 2000-09-13 | 2002-03-21 | Voith Paper Patent Gmbh | Mechanism to transfer the leader strip of a paper/cardboard web, between stations, has a swing guide plate and a blower plate with a cutter each with blowers to direct the leading end of the strip into a cable feed nip |
| DE10136466A1 (en) * | 2001-07-26 | 2003-02-13 | Voith Paper Patent Gmbh | Method for operating a machine used to produce a fibrous web and machine for producing such a fibrous web |
| DE102007053700A1 (en) | 2007-11-10 | 2009-05-14 | Andritz Küsters Gmbh | Device for transferring a flexible material web, in particular a paper or board web |
| DE102014222548A1 (en) * | 2014-11-05 | 2015-10-29 | Voith Patent Gmbh | Stripping device for knocking off an edge strip of a material web, method for knocking off an edge strip of the material web and use of the stripping device and the method |
| DE102017008044A1 (en) * | 2017-08-25 | 2019-02-28 | Heuft Systemtechnik Gmbh | Discharge device with Coanda stabilizer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4904344A (en) * | 1989-04-17 | 1990-02-27 | Beloit Corporation | Automatic web threading apparatus and method |
| DE3924897A1 (en) * | 1989-07-27 | 1991-02-07 | Escher Wyss Gmbh | Leader transfer - has swing jet mechanism to separate leader from roller and transfer it to onwards cable conveyor |
| CA2028443C (en) * | 1990-10-24 | 1996-04-30 | Stanley Hui Mah | Counter-rotating knife paper tail ripper |
| DE9109313U1 (en) * | 1991-07-27 | 1991-09-26 | J.M. Voith Gmbh, 7920 Heidenheim, De |
-
1994
- 1994-03-21 DE DE4409660A patent/DE4409660A1/en not_active Withdrawn
-
1995
- 1995-03-14 CA CA002144623A patent/CA2144623A1/en not_active Abandoned
- 1995-03-20 BR BR9500955A patent/BR9500955A/en not_active IP Right Cessation
- 1995-03-20 EP EP95104046A patent/EP0674045A3/en not_active Withdrawn
- 1995-03-20 FI FI951291A patent/FI951291A/en not_active Application Discontinuation
- 1995-03-20 JP JP7061150A patent/JPH07323946A/en active Pending
- 1995-03-21 KR KR1019950005937A patent/KR950032888A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6394331B1 (en) | 1999-06-29 | 2002-05-28 | Voith Sulzer Papiertechnik Patent Gmbh | Device and process for separating and transferring a leader strip |
| WO2009063132A1 (en) * | 2007-11-14 | 2009-05-22 | Metso Paper, Inc. | A method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
| EP2209942A1 (en) * | 2007-11-14 | 2010-07-28 | Metso Paper, Inc. | A method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
| EP2209942A4 (en) * | 2007-11-14 | 2010-12-01 | Metso Paper Inc | A method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
| US8221589B2 (en) | 2007-11-14 | 2012-07-17 | Metson Paper, Inc. | Method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
| CN101910514B (en) * | 2007-11-14 | 2013-09-18 | 美卓造纸机械公司 | A method, a blade holder and a doctor apparatus for detaching a web threading tail from a moving surface in a fiber web machine |
| EP2209942B1 (en) | 2007-11-14 | 2016-05-04 | Valmet Technologies, Inc. | Blade holder for detaching a web threading tail from a moving surface of a fiber web machine |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9500955A (en) | 1995-10-17 |
| KR950032888A (en) | 1995-12-22 |
| FI951291A (en) | 1995-09-22 |
| DE4409660A1 (en) | 1994-08-18 |
| EP0674045A3 (en) | 1997-04-23 |
| EP0674045A2 (en) | 1995-09-27 |
| JPH07323946A (en) | 1995-12-12 |
| FI951291A0 (en) | 1995-03-20 |
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| Date | Code | Title | Description |
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| FZDE | Dead |