EP0031298A2 - Process and apparatus for manufacturing web rolls - Google Patents

Abstract

In a method or a device for producing tape rolls of narrow tape strips cut from a wide tape, in particular narrow film strips, at least one row (5a, 5b) of holes is punched into a material tape. Then an adhesive strip (9) provided with pressure-sensitive adhesive is applied to cover the holes (1) and this is cut into strips (11) such that each strip contains a covered hole of at least one of the rows of holes. When winding the tape strip on a roll core (13) there is a covered punch hole after the leading (11a) and / or trailing tape strip end (11b) when rolling up. Now such a strip of tape is fed to the roll core and wound up, pressure being exerted on the outside of the adhesive strip (9). The leading end of the bend strip (11a) is hereby glued to the roll core. When the tape roll is completely wound up, pressure on the adhesive tape (9) over the hole at the trailing end of the tape (11b) sticks this end onto the winding of the tape roll underneath.

Description

The invention relates to a method and a device for the production of tape rolls of narrow tape strips cut from a wide tape, in particular narrow film strips. It also relates to the tape rolls produced by this method or device.

Tape material is often coated or otherwise treated in widths of up to one and a half meters and then cut into narrow tape strips, which in the case of narrow film strips are often not allowed to be wider than 16 mm. These strips of tape are then usually wound onto a roll core to make them easier to transport.

It is generally required that the trailing end of a strip of tape material wound into a roll be attached to the underlying roll of the roll to prevent the wound roll from unintentionally unwinding. Often, the trailing end of such a tape strip is glued to the winding underneath by means of a short piece of pressure-sensitive adhesive tape. However, it is extremely time-consuming to attach a piece of adhesive tape by hand to each wound roll when, for example, 1.45 m wide tape has been cut into 89 tape strips. The automatic execution of this procedure step is difficult to accomplish. Similar difficulties are encountered when attaching the leading end of a strip of tape to the core on which it is to be wound.

These difficulties are avoided and the task of producing a tape roll with a fixed leading and / or trailing end of the strip is achieved by a method and a device of the type described at the outset, the features of which are described in claims 1, 5 and 7, while in the remaining claims Features of preferred embodiments of the invention are listed.

The holes can either be circular or elliptical, or they can be elongated into slots. Now such a hole does not necessarily have to lie in the middle of the narrow strip of tape, but elongated slots can also be cut lengthways in the middle when the wide tape is cut open, so that slot halves are present as notches on the strip end concerned, which are covered by the adhesive tape. When pressed for the purpose of sticking, the glue points are then on both sides of the tape strip instead of in the middle.

If a double row of holes is punched out across the band width, each punch hole preferably has the shape of a slot elongated in the direction of the longitudinal axis of the tape strip, the slot length preferably corresponding to the width of the tape strip, while the diameter of the punch hole transverse to the tape strip longitudinal axis preferably 1/4 is up to 3/4 of the strip width.

The preferred use of adhesive strips which have alphanumeric characters on the outside has the advantage that the finished strips of tape strips are already numbered. Bar code means can also be used here.

In the device according to the invention, the pressing means used can be those which can press on both the leading end of the strip on the roll core and the trailing end of the strip on the outer winding of the roll underneath. If two rows of holes are to be punched across the tape, this can be done in succession with a single rod, but it is preferred to use two punches at the same time in order to ensure a precise distance between the two rows of holes. The adhesive tape used here is preferably sufficiently wide to cover both rows of holes in the double row at the same time. If the tape obtained in this way is cut across the band width between the two rows of holes, the holes of one row are at the trailing end and those of the other row are at the leading end of the tape strips obtained during longitudinal cutting.

In the preferred use of a metal foil strip as a carrier for the pressure-sensitive adhesive, the metal foil can also serve to activate the cutting device.

The tapes of the wide tape may be serrated, wrinkled, or damaged in some other way before or during processing. When the wide strip is cut into strips, the two outer strips on the right and left edges of the wide strip are treated as rejects delt. No holes need to be punched out in the area of these two strip strips.

The method and apparatus according to the invention are particularly advantageous for the production of roll film material, e.g. used especially by narrow film rolls. Some photographic film material must additionally have a perforation along one edge or along both edges, which must be applied after the wide strip has been cut into the individual strip strips, but before being rolled up. In such cases, a perforator of conventional design can be interposed between the cutting device and the winding device of the device according to the invention. However, the holes created in this perforation are too small to allow the leading end of the tape strip to be glued to the core of the reel or the trailing end to the winding underneath it, if they are covered with adhesive strips.

If it is required according to the invention in the claims that a hole must be present at at least one end of each narrow strip of tape, this hole can also be punched out as a correspondingly large notch on the right and / or left edge of the strip instead of in the middle of the strip.

• Fig. 1 eine Draufsicht auf eine schematisch dargestellte Vorrichtung nach der Erfindung;
• Fig. 2 eine Seitenansicht eines Teils der Vorrichtung nach Fig. l, und
• Fig. 3 einen vergrößerten Längsschnitt durch das vorlaufende Ende eines Bandstreifens sowie seine Befestigung auf einem in Seitenansicht gezeigten Rollenkern darstellen.

Further details of the invention emerge from the accompanying drawing, in which

• Figure 1 is a plan view of a schematically illustrated device according to the invention.
• Fig. 2 is a side view of part of the device of FIG. 1, and
• Fig. 3 represent an enlarged longitudinal section through the leading end of a strip and its attachment to a roll core shown in side view.

In the figures, the same parts are provided with the same reference symbols.

In the device shown in Fig. 1, the photographic film material coated with a light-sensitive gelatin emulsion layer in the form of a tape 1 is moved through the device by contact with the rotating drive rollers 2 and 3. The belt 1 driven in this way passes under the punches 4a and 4b, two rows 5a and 5b being formed from punched holes in the belt 1. The tape 1 then passes through an adhesive tape application device 6, in which pressure-sensitive adhesive material is pulled off an adhesive tape roll 7 and across the tape 1, covering the rows of holes 5a and 5b, glued facing the adhesive side of the tape surface and cut off by means of a knife 8, so that on the Film covering the holes of both rows of holes 5a and 5b an adhesive strip 9 remains. That this Tape 1 carrying adhesive strips 9 is then fed to a slicing device 10, which cuts the tape 1 into strips 11, each of which has two holes covered by a short piece 12 of adhesive material. Each of the strips 11 is fed to a roll core 13 and is immediately cut between the holes in the adjacent rows 5a and 5b by means of the cutter 14. When the trailing end of each strip 11 containing the hole comes up onto the core 13, a pressure roller 15 presses against this trailing end and thereby causes this end to stick to the roll. The leading ends, containing the holes in the row 5b, of the next strips 11 are now fed to new roll cores 13. When it arrives on the cores 13, the roller 15 immediately presses against the leading ends of the tape strips and sticks them to the roller cores 13. The tape strip is then wound up until the roll on the core 13 has reached a desired size, whereupon the cutter 14 repeats the process described above and the roller 15 then glues the trailing end of each tape strip 11 onto the roll winding underneath.

2 shows a side view of the slicing device 10 and two roll cores 13 with the associated pressure rollers 15. Since in practice each of the strips of a strip often has a bevel, it is preferred that each strip is wound on its associated roll core 13 at a different level from the adjacent strips.

3 shows the leading end of a film strip 11 which has a punched hole 5b, which is covered by a short piece of adhesive tape 12. The middle area of this adhesive strip 12 is pushed into the hole 5b and glued to the roll core.

The pressure roller 15 preferably has a foam rubber coating in order to achieve close contact between the pressure-sensitive inside of the piece of adhesive tape 12 and the surface of the core 13.

In a preferred mode of operation, a 1.45 m wide band of film material is cut into 89 usable narrow film strips, which are each individually wound onto driven roll cores 13. The distance between the punch 4a and the driven roll cores 13 is preferably one meter in this device. In doing so, film material strips with a length of 30 m are to be wound onto each roll core.

When starting up, the belt 1 is guided through the device with the aid of drive rollers 2 and 3, and the individual narrow film strips 11 produced therein are then automatically guided onto the driven roller cores 13 and their leading ends pressed onto the cores. Initially, only the punch 4a is started, since at the start of operation only one hole per film strip is required. The tape 1 runs through the device, the number of revolutions of each roll core being recorded and, as soon as this number of revolutions corresponds to a length of 29 m of film material wound on the core 13, the punches 4a and 4b are activated in order to punch the rows of holes 5a and 5b to generate at the same time. When these rows of holes arrive in the Adhesive tape attachment device 6, the pressure-sensitive adhesive tape 9 mentioned is then applied covering the double row of holes on the web 1 and cut off by means of the knife 8. The web now passes through the cutting device 10 and each narrow strip of tape 11 with the short piece 12 of adhesive strip 9 thereon now passes through the cutter 14, in which each strip 11 is simultaneously cut between the holes in the rows 5a and 5b. The cut strips 11, which each have a hole at their leading and trailing ends in the direction of the arrow, are then wound onto their roll cores 13. When the reels are completely wound up, the drive rollers 1 and 2 are stopped and the further movement of the belt 1 by the device is thereby stopped. The trailing loose tape strip ends resting on the outermost winding of each roll are now pressed firmly onto the winding of the film strip underneath by rotating the roll by means of the driven cores 13, and the loose end of the film strip is fixed. Because by pressing the adhesive located above the punched hole on the inside of the adhesive tape is activated and causes the firm adhesive connection of the trailing end with the film roll.

Each core 13 carrying a finished roll is then removed from the device and fresh roll cores 13 inserted into the device.

The drive rollers 1 and 3 are now set in motion again and, as a result, strip strips 11 are automatically brought back to the new roller cores 13, which in turn are now set in motion, the above running ends of the tape strips pressed against the pressure rollers 15 and firmly connected to them. Now, tape strips of 29 m in length are again wound onto the cores 13, the punching out of the holes, the application of adhesive strips over these and the cutting into narrow tape strips being repeated.

Claims (9)

1. A process for the production of tape rolls from narrow tape strips cut from a wide tape, in particular pubic film strips, characterized in that a wide material tape (1) is first fed to a punching device (4) in which at least one overlaps into the tape (1) the row (5a, 5b) of holes is punched in, thereon an adhesive strip (9) extending across the band (1) and provided with pressure-sensitive adhesive on its side facing the band material is applied in the zone (5) containing the row of holes, covering the holes, that the wide material strip (1) treated in this way is then fed to a cutting device (10) in which the wide strip is cut into strips (11) such that each strip (11) has a covered hole in at least one of the rows of holes (5a, 5b) contains, when winding a narrow strip of tape (11) on a roll core (13) the covered punch hole near the leading (lla) or near m trailing tape strip end (llb), or that a such a hole of a first row of holes (5b) can be close to the end (11a) leading when rolled up and another hole of another row of holes (5a) can be close to the end (11b) trailing when rolled up, such a narrow tape strip (11) is then fed to a roll core (13) in a tape winding device and, if the leading tape end (11a) has a covered hole, pressure is exerted on the outside of the adhesive tape (9) above this hole. whereby the leading end of the tape strip (Ila) is glued to the roll core (13) through the hole, and if the trailing end of the tape strip (11b) has such a covered hole, with the tape strip reel fully wound by pressure from the outside on the adhesive strip (9) of this hole the trailing end (llb) is glued to the winding of the tape roll underneath. 2. The method according to claim 1, characterized in that the at least one row of holes (5a, 5b) extending across the wide band (1) at the trailing band end (Ib) overlapping adhesive strips (9) on the outside thereof extends across the band width Row of alphanumeric characters, in which each character is arranged so that when the tape (1) is cut into several narrow tape strips (11) a whole character appears on a tape strip (11). 3. The method according to claim 1 or 2, characterized in that the adhesive strip (9) has a metal foil strip carrying the pressure-adhesive layer as a carrier. 4. The method according to any one of claims 1 to 3, characterized in that near at least one end of the wide band (1), a double row (5a, 5b) of holes is punched across the bandwidth, the two rows of holes (5a, 5b ) the double row are so close to each other that they are covered by a common adhesive strip (9). 5. Device for producing tape rolls from narrow tape strips cut from a wide tape (1), characterized by: means (2, 3) for inserting and transporting a wide band of material (1) through the device; a punching device (4) for punching out at least one row of holes (5a, 5b) across an inserted wide band (1); an adhesive tape attachment device (6) for applying to the tape (1) adhesive tapes (9) carrying a pressure-sensitive adhesive layer on a side facing the tape (1), covering the holes in the row of holes (5a, 5b), a cutting device (10) by means of which the wide band (1) is cut into a number of narrow band strips (11), each of which has a hole in at least one of the covered rows of holes (5a, 5b); a winding device for winding narrow strip strips (11) onto a roll core (13), a cutting device (14), by means of which a narrow strip of tape (11) can be cut off at or near a punched-in hole, so that such a hole is wound up at the leading (11a) and / or at the trailing end (11b) of the narrow strip (11) is available; and a pressing device (15) for exerting pressure on the outside of an adhesive strip (9) in the region of a hole, as a result of which the leading end (11a) of a strip of tape (11) on a roll core (13) or the trailing end (11b) of the latter Tape strip (left) is glued to the underlying winding of the tape roll. 6. The device according to claim 5, characterized in that the pressing device (15) has a pressing member covered with resilient material. 7. tape roll with roll core (13) and on this wound tape strip (11), in particular narrow film strip, characterized in that the tape strip (11) on at least one of its two ends (lla, llb), one of which leads in advance when winding (lla ) rests on the roll core (13) and the other rests on the outermost complete tape winding when the roll is wound up; has a hole which is covered on the outer tape surface facing away from the roll core (13) by an adhesive strip (9) which carries a pressure-sensitive adhesive on its inner surface facing the roll core (13) and by means of this adhesive through the hole Roll core (13) or is glued to the underlying tape winding. 8. Tape roll according to claim 7, characterized in that the outside of the adhesive strip (9) is formed by a metal foil strip. 9. Tape roll according to claim 7 or 8, characterized in that the hole present at the end of the tape strip is present as a notch on the left and / or right edge of the tape strip.

Images