DE2326854A1 - METHOD AND DEVICE FOR SEPARATING A WEB - Google Patents

Description

Eastman Kodak Company, Rochester, N.Y. 14650, U.S.A.

Method and apparatus for severing a web.

The invention relates to a method for separating a Tape or a web that runs over a winding drum, so to complete a first roll of tape and transfer the cut end of the tape to a core to form a second roll of tape. The invention also relates to a device for carrying out this method »

There have long been known methods and devices, according to which after completion of a role without stopping the Winding machine the winding process of another roll is initiated. One such process uses an adhesive surface attached to the core on which the new roll is to be wound, this core with the tape and a tape drive current

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mel is engaged, after which the Tape should adhere to the new core. If the attachment part adheres to the new core, it is wound onto the new core, the tape desirably being cut across its entire width. Frequently, however, the tape tears in the longitudinal direction and not in the transverse direction, so that the winder is stopped must be in order to make the necessary cutting operations. This known method is therefore unreliable and because of the Time consuming and wasteful of tape material costly.

Another device for severing a tape after completion a roll and for winding a new roll without stopping the machine is in the paper industry under the name Known as "Pope Reel". One embodiment of this winding device is described in U.S. Patent 1,248,542. A drive drum is generally provided over which the belt (or the Web), whereby a new core is brought into circumferential engagement with the drum, and is also driven by this. That The tape is cut along a line just below the new core, with the leading edge formed in this way is passed around the top of the core. This guidance of the belt can be by air, water or steam jets or by mechanical Operations are achieved. How this is done by mechanical means is described in US Patent 2,461,246? thereby becomes a Felt strips or the like cut up, one end of which is attached to a spring clip adjacent to one edge of the tape, wherein a central portion of the cutting strip is passed over the new core adjacent the opposite tape edge. To now that Cutting off tape or web and transferring the leading edge thus formed to the new core becomes the other end of the Cutting strip wound onto a roll by a motor, whereby the strip moves over the tape or web and cuts the web and winds it on the new roll = similar Devices are also described in US Patents 2,323,047 and 3,096,947 using a cutting wire, the latter of which is used one end is releasably retained adjacent to one band edge, while the opposite wire end is releasably retained adjacent to the opposite one Load the web edge on the new core with a hook or the like.

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can be consolidated.

Another method and apparatus is described in US Patent 3,599,888 which uses a strip of adhesive tape in place of a cutting wire. A rear portion of the tape is helically adjacent to a rotatable tape rod and wound in alignment with the tape or web, the front portion of the tape being attached to the new core by hand before the core engages the winding drum. Accordingly, when the core comes into engagement with the winding drum and is set in rotation by this, the rear part of the tape is released from the tape rod and remains attached to the tape (ie the web) and the web cuts through when it passes through the Gap between core and drum (ie the contact zone) runs, with the front end of the cut tape being wound onto the core. A disadvantage of this method and apparatus is that one must manually attach the leading end of the tape to the new core. Furthermore, wrinkling occurs when the leading end of the tape is wound onto the new core due to the speed difference between the new core and the tape when the core is brought into engagement therewith during the transfer process. Such wrinkles damage subsequent winding layers of the tape? is applied to a sufficiently large number of windings on the core, to smooth out these disturbances "The damaged in this way lengths can take a considerable amount _T which depends on the extent of Faltenbildung.und the properties of the tape. For example, with a 2/1000 nominal band, there is considerably more waste due to pressure points than with a stiffer 10 / 1000th inch band.

The invention aims to provide a method and an apparatus of to be provided in the manner described in the introduction, the disadvantages of the prior art being avoided and in particular the formation of wrinkles is removed at the front end of the tape "

According to the invention, this is indicated by those specified in claim 1

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Method steps and the device features mentioned in claim 8 achieved.

Further preferred refinements of the invention result in particular from the subclaims.

In the following, some features of the invention will also be explained. In the method according to the invention, a Core on which the new roll is to be wound, in circumferential engagement brought with a rotating belt carrier? to in between to form an insertion zone through which the tape is transported will. The core is wider than the bandwidth, with the ends or the extensions provided on them extend beyond the adjacent belt edges. A cutting strip with a tear strength greater than the tear strength the tape is in a holding position between spaced apart Parts of'band and roll arranged, with a central part of the strip is in alignment with the tape surface opposite the roller and is inclined at an angle to it the gap between the core and the roll (i.e. the contact zone) is »The cutting strip is provided in such a way that its front and rear end parts extend over the adjacent tape edges extend out with a lug piece attached to the front end portion "". The 'cutting strip is out of the holding position moved into the transfer position, in which he is directly in the contact zone is entered, with the attachment part on the Core end or the core extension adheres and the strip for severing the tape and transferring the front end of the cut tape is used on the core.

A preferred embodiment of the cutting strip handling device for releasably holding the cutting strip and for moving the cutting strip into the contact zone between The roll and core has a table for releasably holding the cutting strip carrier sheet, with the front end of the sheet extends beyond the front edge of the table. The table is slidable on a storage bed for reciprocation arranged in a direction laterally to the web, namely

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between a loading position and a holding position. In the loading position the table is arranged freely opposite the belt and can be loaded with a support sheet having a cutting strip will; in the holding position, the table is spaced from and aligned with the belt. The camp bed is also sliding on a rigid frame for a to-and-fro movement arranged along the tape, between the holding position and a transfer position in which the front end of the supporting sheet is slowly inserted or thrown into the contact zone between core and roll.

The method according to the invention and the device according to the invention minimize the time lost in winding devices and the waste of tape or paper material the transfer process, the present invention also avoids the manual handling of a cutting strip by the operator during the transfer process, so that possible injury to the operator is excluded. Furthermore the present invention has the advantage that the transfer process can be started and ended more precisely. It is also possible to releasably attach the supporting sheet used in the transfer process to the end of the old roll adjacent to the roll winding. the In addition, the device according to the invention is simple and reliable in its construction and can be manufactured economically and has a high degree of efficiency.

Further advantages, goals and details of the invention emerge from the description of exemplary embodiments on the basis of FIG Drawing; in the drawing shows:

Fig. 1 is a schematic side view of one type of tape roll ! Device in which the embodiment of the invention is used;

Fig. 2 is an enlarged perspective view of the winding device according to Fig. 1, wherein the tape is broken away to the handling or introduction device for the carrier sheet in a Holding position (solid lines) and in a loading position

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(dashed lines);

3 shows a perspective partial view similar to FIG. 2, the carrier sheet handling device in a transfer position is shown in which the carrier sheet is fed into the gap between the roller and core;

Fig. 4 is a partial perspective view of the cutting strip, the severing the tape and placing the leading end of the severed tape on a new core during a handover operation;

Fig. 5 is a plan view of a carrier sheet and an embodiment ' example of the cutting strip attached to it;

Figure 6 is an enlarged view of a section taken generally along line 6-6 in Figure 5;

Fig. 7 is a plan view of the carrier sheet on which another embodiment of the cutting strip is attached.

Since tape winding devices have been known for a long time, only the elements essential to the invention are intended below such devices are described, the elements not described in a corresponding manner from the prior art Technique can be selected.

In Fig. 1, a preferred embodiment of the invention is shown, together with a known type of one Winder in which a tape 10 is severed for making a roll 12, the leading end of the severed Tape is transferred to a new core 14, so the winding process to initiate a new role. The winding device generally has a housing 16 which is pivotable on a Shaft 18 is mounted and has core support means 20 which "by fluid cylinder 22 to a core locking position are movable to hold the new core 14 generally at a transfer device A, but without a winding drum 24

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to be in circumferential engagement. The band (web) 10 coming from a papermaking machine or the like runs over guide rollers 26 and is cut off by suitable devices and then transferred to the new core 14 when it passes through the housing 16 by means of an arm 27 , an eccentric wheel 28 and a cam 30 is brought into engagement with the winding drum 24. The rotating core with the tape 10 wound up on it is moved further through the housing 16 along the circumference of the winding drum 24 until it reaches the winding end position designated by B? at this point the core 14 is released and the housing 16 is returned to its normal position to receive and hold a new core. When the roll 12 is completely wound up at the winding station B, the tape is cut off again and the severed tape end is transferred to a new core 14 at station Ά The resiliently mounted gripper 36 engages the spindle of a fully wound roll 12 and slides the roll along rails 38 into the removal station C. "Since a winding device of the type described above is generally already known, a further description and details will be given apart from that » ,

In a normal winding process of the above winding device - in which the present invention is incorporated, the tape 10 is guided over guide rollers 26, over the winding drum and onto a core 14 which - as already mentioned - is guided by housing 16 and eccentric 28 in the winding position B has been transported. The core 14 is usually provided on its circumference with not shown _r on both sides adhesive tape rings in order to avoid between the roller 12 and the core in the subsequent operations slip. The roller 12 is driven by the drum 24 at station B? until the wound tape 10 reaches the desired size. When this occurs, the tape is severed by one of the two possible cutting strips 40 , 40 ″ (FIGS. 2 and 7), this cutting strip being fed into the gap formed between core 14 and drum 24 by an input device 41 to be described in detail below will.

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The cutting process completes the old roll and the cut starting end is transferred to the new core 14 previously in circumferential engagement by housing 16 with the Drum 24 was brought to the transfer position A. Advantageously the handover or transfer process does not begin until the new core has been used for a sufficiently long period of time stood in circumferential engagement with the drive drum 24, so that the peripheral speeds of the drum and core substantially are the same. Accordingly, when the transfer is made, there is slippage between the new core 14 and the tape 10 minimizes what causes minimal wrinkling or deformation of the belt. Winding up on the core.

As already mentioned, the tape 10 is severed by one of the cutting strips 40, 40 '(compare FIGS. 5 and 7) and the cut starting end is transferred to the new core. The length of the core 14 is greater than the tape width or, if the core and tape are of the same length, the core is provided with core extensions so that the core extends beyond the adjacent wall edges. Attached to the front end 42 of the strip 40 is an attachment part 44 which has an adhesive surface which is opposite when it is placed on the core and which is used to adhere to the core end when the strip is inserted into the gap between the core and drum. The strip 40 is preferably made of a polyethylene terephthalate material such as Estar (Trademark) or Mylar (Trademark) having a tear strength greater than that of the tape. Since the polyethylene terephthalate material is relatively smooth, it is useful to glue the strip 40 to the tape 10 during the transfer process in order to cut the tape. This can be accomplished by placing a tape 46 (see Figures 5 and 6) with an adhesive surface on both sides - such as commercially available Scotch (trademark) cellophane tape - along the central portion 45 of the cutting strip, one One side sticks to the strip and the other side sticks to the tape 10 ^ ient when the strip 40 is inserted into the gap between core 14 and drum 24. When a Schneid.?-*-: ': ~' fen ■ 40 The positions shown in Fig. 5

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If type is located between the spaced parts of the belt and drum, the middle part 45 will be in alignment disposed with the tape 10 with the leading and trailing ends of the strip extending beyond the adjacent tape edges. The extension portion 44 is substantially parallel to the adjacent tape edge, and when the cutting strip in the Gap is entered between the core and the drum, the extension part 44 protruding beyond the adjacent band edge is wound partially around the new core 14 and sticks to it, thereby preventing the extension portion from the core at the high Transmission speed is withdrawn. The strip 40 cuts through the tape when it - as shown in Fig. 4 of the Curvature of the new core follows.

In the cutting strip 40 'shown in Fig. 7 is the Middle part -45 "V-shaped and with an adhesive attachment part 44 attached to each end. If the strip is in a holding position, then the middle part is 45 'substantially aligned with the tape with the ends extending beyond the adjacent tape edges. The extension parts 44 ″ also extend beyond the belt and preferably run essentially parallel thereto.

The cutting strips 40, 40 'are each detachable at the beginning preferably flexible carrier 48 - such as a sheet of paper or the like. - attached (compare FIGS. 5 and 7), and by suitable means, such as a ribbon or ribbons 50, 50 *. These tapes each have an adhesive surface on the side engaged with the central portion 45 of the cutting strip 40, and an adhesive surface on the opposite side adhering to the carrier sheet 48. The adhesive strength with which a cutting strip 40, 40 * sticks to the carrier sheet 48 / is such chosen / that it is smaller than the adhesive force with which the Cutting strip adhered to the tape after the strip was stuck during the The transfer process has been engaged with the tape. Accordingly, the cutting strip 40, 40 'from the carrier sheet 48 during deducted from the transfer process. When this occurs, it sticks Carrier sheet 48 at the rear end of the tape 10 on the old roll 12 due to the adhesive tapes 50, 50 '. If the carrying

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arch 48 with one. Adhesive part is provided on the opposite side of the tape of the rear end of the sheet 10 or if tapes 50, 50 '/ the! direction of tape travel over the cutting strip 40, 40 '- as shown in Figs. 2, 3, 5 and 7, the support arch 48 becomes releasable at the end of the old one Roll stick to the adjacent roll winding and prevent the rear end of the old roll 12 from unwinding. Further the carrier sheet can be removed from the old roll and used again.

The cutting strip insertion device 41 is used for insertion of the cutting strip into the opening or the gap between Core 14 and drum 24 and has a rectangular table 52 which carries sheet 48 and extends it on three sides by peripheral lips 54 includes. A fourth or front side or edge of the table is open and the front edge 56 of the support sheet 48 is open extends a short distance beyond the adjacent front edge of the table 52. When the arch in the opening (Contact zone) of core 14 and drum 24 is used, this overhang over the front edge can be 3 inches or more, so that an impact of the table 52 on the drum 24 is prevented. The table 52 is slidable on an elongated rectangular Bearing bed 58 supported by elongated ribs and Schlitzleitüngsbahnen 60, so that a reciprocating movement can take place in a direction laterally to the belt 10, namely between the loading position shown in dashed lines in FIG (in which the table is removed from the belt and loaded with a carrying sheet with a cutting strip can) and a Haltesteliung shown with solid lines in Fig. 2, in which the table 52 is in alignment with the band 10 and below it. The bed 58 is slidably mounted on a rigid frame 62, and although for a back and forth movement parallel to the barricade 10 between the holding position and the transfer position shown in FIG. 3, in which the leading end or leading edge 56 of the support sheet 48 slowly enters the space between the core 14 and the drum 24 entered or, if desired, quickly thrown in. Although the frame 62 is shown as a rigid frame, so

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it can also be movably mounted by any suitable means in order to be moved into the holding position before the table 52 can be moved to the loading position. The plain bearing between the bearing bed 58 and the frame 62 has projecting flanges 64 on the bearing bed which are equipped with openings are to receive rods 66 extending between flanges 68 on the frame. The front flanges 68 on the frame 62 limit the forward movement of the bed 58 and the table 52 to an exact transfer position, through the interaction between the flanges 64, 68; but it is also possible Flanges 68 with adjustable screws (not shown) to provide an adjustable stop with which the Flanges 64 can come into engagement. The reciprocating motion is imparted to the table 52 by any suitable means such as a fluid cylinder 70, which is controlled by fluid valves connected by a flexible Pipe or the like. Are connected to a flow source. By properly setting and regulating the fluid pressure For example, the sheet 48 can enter the opening at a speed substantially equal to the speed of the belt (web) be thrown in between core 14 and drum 24. This can be done with high belt speeds may be desirable, particularly at belt speeds in excess of 500 feet per minute.

When using this invention it is initially assumed that the decision has been made to continue the winding process on the old one Complete roll 12 and initiate the winding process of a new roll on the new core 14. The operator will then attach a new core 14 on the winding device and the Bring the core into circumferential engagement with the winding drum 24 through the housing 16 and associated devices. The operator will also arrange one of the cutting strips 40, 40 'on a support sheet 48, the table 52 laterally outwards into his Move the loading position freely from the belt 10, place the support sheet 48 on the table 52, and then return the table to its holding position. In this holding position, the central part 45, 45 ′ of the cutting strip 40, 40 ″ is essentially aligned with the band 10 and at an angle to the opening of the core

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and drum 24 "An angle of 6 has been found to give satisfactory results, but any other suitable angle may be used" The front and rear ends of the central portion 45 and the forward ends of the central portion 45 'extend across the adjacent edges of the tape 10 and the extension parts 44 , 44 "run essentially parallel to the adjacent tape edge. Depending on various circumstances, the order of the above operations of inserting a new core and a cutting strip may vary = when the core 14 is brought into circumferential engagement with the belt 10 on drum 24 and the peripheral speeds of the core and drum are substantially the same, the transfer process is initiated by actuating the fluid cylinder 70, whereby the bed 58 and table 52 are moved from the holding position to the transfer position to the front end 56 of the support sheet 48 in the ö to insert an opening between the core and the tape on the drum »The attachment portion 44, 44 ° of the cutting strip 40, 40" wraps around the new core 14 and remains stuck to it while the cutting strip cuts the tape 1O and the front end 72 ( 4) winds the cut tape onto the new core 14 to form a new roll.

Although the invention in connection with a tape rewinding device of the type shown in Fig. 1, the invention can of course be applied to any type of tape winding device can be used in which a new core can be brought into circumferential engagement with a tape carrier over which the tape is transported is, no matter o. ": <the tape carrier is designed to be fixed or rotatable is.

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Claims (1)

[ 1. / Zerfahren for severing a tape running over a winding drum for the purpose of completing the formation of a first tape roll and for transferring the severed starting end to a rotatable core to form a second tape roll, characterized by the following steps a) Movement of core (14) and winding drum (24) relative to one another in circumferential pressure engagement to form a contact zone, through which the belt (10) runs; b) rotary drive of the core (14)? c) arrangement of a strip (40, 40 ') with a tear strength greater than that of the tape (10) in a holding position between spaced portions of the tape and the winding drum (24), a front portion (42) of the Strip an adhesive surface opposite the core (14) and extending beyond the adjacent edge of the tape (10), and wherein the central portion of the Strip (45, 45 ') substantially aligned with tape (10) and is arranged at an angle with respect to the contact zone; d) Transporting the strip (40, 40 ') from the holding position in a transfer position in which the strip (40, 40 ') enters directly into the contact zone, whereby the front part (42) having an adhesive surface on itself rotating core and the middle part (45, 45 ") adhered and the front end (72) of the ■ severed tape and the Center part (45, 45 ') is wound onto the core (14). 2. The method according to claim 1, characterized in that the front adhesive part is an attachment part (44) which is substantially runs parallel to the adjacent strip edge. 3. The method according to claim 1, characterized in that the central part (45,45 ') of the strip made of a polyethylene terephthalate material a first width, with a band (46, 46 ') is glued on with a second width that is not 309850/0448 is greater than the first width and has an adhesive on each side. 4. The method according to claim 1, characterized in that the strip (40, 40 ') is attached to a flexible support sheet (48) prior to placement of the strip in FIG a stop position. 5. The method according to claim 1, characterized in that the middle part (45) extends over the entire width of the belt. 6. The method according to claim 1, characterized in that one forms the strip with ends which extend over the neighboring ones Tape edges extend in the holding position and wherein a V-shaped portion is substantially aligned with the tape and extends at an angle with respect to the contact zone. 7. The method according to claim 1, characterized in that entering the strip is delayed until the peripheral speeds the winding drum (24) and the core are substantially the same. 8. Device for performing the method according to claim 1, wherein a winding drum is provided which drives a core on which a tape is wound, and wherein a Cutting strip then cuts the tape when the tape wound on the core reaches a desired amount, and finally the leading end of the cut tape is transferred to a second core passing through the winding drum is driven marked by a support sheet (48) carrying a cutting strip (40, 40 ') and an input device (41) for inputting the support sheet (48) in the contact zone between the second core (14) and the Winding drum (24), namely on the side of the belt (10) 3098 50/0448 neighbor to the vetch! drum (24) = 9 = winding device according to claim 8, characterized by support means (52) for releasably holding the tape cutting strip (40) in a holding position, the strip having an attachment part (44) extending beyond the adjacent edge of the tape and a central part (45) which is essentially aligned with the tape, and wherein the attachment and middle parts have an adhesive surface on at least one side " and wherein further means separate from the core are provided in order to feed the strip essentially directly into the contact zone" ΙΟ »Device according to claim 9 _r, characterized in that the attachment part (44, 44 ^s ) runs essentially parallel to the adjacent strip edge, with the middle part • (45.45 °) extending over the full strip width. ο Device according to claim 9, characterized in that, the strip (40 °) has lug portions (44 °) at each end and a V-shaped central portion (45 ') which lies between the attachment parts and is connected to them (Pig «7). 12. Apparatus according to claim 9, characterized in that the extension parts extending over the adjacent belt edges run essentially parallel to these edges, with the V-shaped central portion extending across and in alignment with the belt » 13. Device according to claims 8-12, characterized in that that the strip support device comprises a flexible sheet (48) to which the strip is releasably attached, and wherein a table is provided for holding this flexible sheet. 309850/0448 / fs » 14. Apparatus according to claim 8 = 13, characterized in that the strip input device means for moving the table from a holding position to a transfer position has towards the investment zone. 15. Apparatus according to claim 8-14, characterized in that that the attachment part has an adhesive on the surface opposite the second core, that the middle part consists of polyethylene terephthalate, and that on the surface of the central part opposite the tape double-sided adhesive tape is releasably attached » 16. Device according to one or more of claims 8-15, characterized by a second, double-sided adhesive tape which is releasably attached to the surface of the central part - which is not opposite to the band (1o), (i.e. the web). 17. Apparatus according to claim 16, characterized in that the adhesive strength with which the adhesive tape adheres to the surface of the central part opposite the tape (10), is greater than the adhesive strength with which the adhesive tape on the opposite surface of the central part adheres to the center of the strip. 18. The device according to one or more of the preceding claims, characterized in that the table (52) the Support sheet (48) is surrounded on three sides by lips (54), the front edge of the table not being delimited, and with a leading edge (56) of the support sheet (48) slightly above the edge of the table protrudes. 19. Apparatus according to claim 18, characterized in that the table (52) slidable for reciprocation between a loading position and a holding position on one Storage bed (58) is mounted. 20. Apparatus according to claim 18 and / or 19, characterized in that that the bed (58) is slidably mounted on a rigid frame (62) so that it can be moved back and forth, and zxtfar parallel to the belt (10) between the holding position and the transfer division = 21. The device according to one or more of claims 18-20, characterized in that the frame (62) Plansche. (68) are provided to limit the forward movement of the bed (58) and table (52). 22. Device according to one or more of the preceding claims, characterized in that the sheet (48) with is moved into the contact zone at a speed substantially equal to the speed of the belt. 23. Apparatus according to claim 18, characterized in that reciprocating the table (52-) by a fluid cylinder (70) is granted. 309850/0448