METHOD AND DEVICE FOR CONNECTING TWO FILM WEBS

• US 20140057769A1
• Filed: 04/11/2012
• Published: 02/27/2014
• Est. Priority Date: 04/15/2011
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Thaerigen, Jan, Wipf, Alfred, Steinemann, Rolf, Wehrli, Markus
• Application Number:
  US14/111,803
• Publication Number:
  US 20140057769A1
• Time in Patent Office: Days
• US Class Current: 493/381
• CPC Class Codes: B23P 19/04 for assembling or disassembling parts
• CPC Class Codes: B65H 19/1821 the replacement web being accelerated or running prior to splicing contact
• CPC Class Codes: B65H 19/1868 The roll support being of the turret type
• CPC Class Codes: B65H 23/1882 and controlling longitudinal register of web
• CPC Class Codes: B65H 2301/46152 cutting off tail after (flying) splicing
• CPC Class Codes: B65H 2301/4621 Overlapping article or web portions
• CPC Class Codes: B65H 2301/4633 Glue
• CPC Class Codes: B65H 2301/4641 by pivoting element
• CPC Class Codes: B65H 2701/191 Bags, sachets and pouches or the like

Abstract

A splicing method serves for connecting an active film web (2) which is wound up on a first reel (4) to a passive film web (3) which is wound up on a further reel (8). The active film web (2) is unwound from the first reel (4) and is fed to at least one processing station. When a remaining film quantity of the active film web (2) is reached on the first reel (4), the active film web (2) is spliced or connected to the passive film web (3), with the result that the passive film web is pulled by the active film web (2) into the at least one processing station and therefore changes from the passive film web into the active film web. Before the operation of splicing, the outer side (18) of the passive film web (3) is provided with a connecting element (19), and the active film web (2) and the passive film web (3) are moved towards one another before the operation of splicing, wherein the active film web (2) is pressed against the further reel (8) with the passive film web (3) and the passive film web (3) is thus spliced to the active film web (2) via the connecting element (19).

Claims

1. A splicing method for connecting an active film web (2) which is wound up on a first reel (4) to a passive film web (3) which is wound up on a further reel (8), wherein the active film web (2) is unwound from the first reel (4) and is fed to at least one processing station, and wherein when a remaining film quantity of the active film web (2) is reached on the first reel (4), the active film web (2) is spliced or connected to the passive film web (3), with the result that the passive film web is pulled by the active film web (2) into the at least one processing station and therefore changes from the passive film web into the active film web, characterized in that an outer side (18) of the passive film web (3) is provided with a connecting element (19) before the active film web (2) is spliced to the passive film web (3), and in that the active film web (2) and the passive film web (3) are moved relatively towards one another, wherein the active film web (2) is pressed against the further reel (8) with the passive film web (3) and the passive film web (3) is thus spliced to the active film web (2) via the connecting element (19).

2. The splicing method according to claim 1, characterized in that the further reel (8) with the passive film web (3) is accelerated before the active film web (2) is spliced to the passive film web (3) such that the peripheral speed of the further reel (8) is substantially equal to the speed of the active film web (2), wherein the passive film web (3) and the active film web (2) move in the same direction.

3. The splicing method according to claim 1, characterized in that the movement of the further reel (8) with the passive film web (3) is synchronized with the movement of the active film web (2), whereby the active film web (2) and the passive film web (3) run position-synchronously to each other.

4. The splicing method according to claim 1, characterized in that the active film web (2) is severed after splicing of the active film web (2) to the passive film web (3) has been completed.

5. The splicing method according to claim 1, characterized in that the inner side (20) of the active film web (2) is connected to the outer side (18) of the passive film web (3) during splicing of the active film web (2) to the passive film web (3), thus enabling the active film web (2) and the passive film web (3) to have the same orientation with respect to the surfaces thereof.

6. The splicing method according to claim 1, characterized in that the start (22) of the passive film web (3), which is spliced to the active film web (2), is secured to the rolled-up passive film web with a locking device (23), wherein the locking device (23) is provided via an adhesive connection (23).

7. The splicing method according to claim 6, characterized in that the connecting element (19) for the spliced connection provides the adhesive connection (23) at the same time.

8. The splicing method according to claim 1, characterized in that the active film web and the passive film web are moved towards one another if a predetermined remaining film quantity of the active film web (2) is detected.

16. The splicing method according to claim 8, characterized in that splicing is triggered if the predetermined remaining film quantity of the active film web (2) is detected.

17. The splicing method according to claim 16, wherein the remaining film quantity is detected by measuring the diameter of the reel.

18. The splicing method according to claim 16, wherein the remaining film quantity is detected by detecting at least one mark in the region of the film end (10) of the film web (2).

19. The splicing method according to claim 1, characterized in that splicing is triggered if a predetermined remaining film quantity of the active film web (2) is detected.

9. A splicing device for producing a spliced connection (26) of an active film web (2) which is wound up on a first reel (4) to a passive film web (3) which is wound up on a further reel (8), wherein the active film web (2) is unwound from the first reel (4), characterized in that the splicing device comprises a first rotational axis (5) comprising the first reel (4), at least one further rotational axis (9) comprising respectively a the further reel (8) and a pressing unit (11), wherein the further reel (8) with the passive film web (3) has a connecting element (19) on an outer side (18) thereof and wherein the active film web (2) and the passive film web (3) can be moved relatively towards one another by means of the pressing unit (11) before an operation of splicing, wherein the active film web (2) can be pressed against the further reel (8) with the passive film web (3) by means of the pressing unit (11), and the film web (3) can thus be spliced to the active film web via the connecting element (19).

10. The splicing device according to claim 9, characterized in that a drive is disposed in each case per rotational axis (5, 9), or a common drive is available for all of the rotational axes (5, 9), which common drive can be coupled to the rotational axis (5, 9), wherein the drive accelerates the corresponding rotational axis (5, 9) comprising the reel disposed on said rotational axis (5, 9) such that a peripheral speed of the reel (8) is equal to a speed of the active film web (2).

11. The splicing device according to claim 9, characterized in that the rotational axes (5, 6) are accelerated by the drive such that the movement of the passive film web (3) can be synchronized with the active film web (2), whereby the active film web (2) runs position-synchronously with the passive film web (3).

12. The splicing device according to claim 9, characterized in that the pressing unit (11) comprises a pressing roller (13), with which the active film web (2) can be pressed against the further reel (8) with the passive film web (3).

13. The splicing device according to claim 9, characterized in that the splicing device comprises a sensor unit for detecting a remaining film quantity of the active film web.

14. The splicing device according to claim 9, characterized in that the splicing device comprises a turret wheel (16), on which the rotational axes (5, 9) are disposed, wherein the turret wheel (16) can be pivoted about a rotational axis (17) so that the rotational axes (5, 9) can be pivoted respectively from a start position into a splicing position, in which the active film web (2) can be spliced to the passive film web (3).

15. The splicing device according to claim 14, characterized in that the active film web (2) and the passive film web (3) can be moved in the proximity of each other via the turret wheel (16) before the operation of splicing, wherein a prepositioning of the active film web with respect to the passive film web can be performed.

20. The splicing device according to claim 12, characterized in that the pressing unit (11) comprises a cutting tool, with which the active film reel (2) can be severed after the splicing operation.

21. The splicing device according to claim 20, characterized in that the pressing unit (11) comprises a pressing roller (13), with which the active film web (2) can be pressed against the further reel (8) with the passive film web (3).