Method and device for cutting and adhesion for an unrolling machine

• US 20100170978A1
• Filed: 04/23/2009
• Published: 07/08/2010
• Est. Priority Date: 04/24/2008
• Status: Active Grant

• Current Assignee: MONOMATIC.
• Original Assignee: MONOMATIC.
• Inventors: Muller, Bernard
• Granted Patent: US 8,628,038 B2
• Time in Patent Office: Days
• US Class Current: 242/552
• CPC Class Codes: B65H 19/1852 taking place at a distance from the replacement roll
• CPC Class Codes: B65H 2301/46174 cutting both spliced webs separately
• CPC Class Codes: B65H 2301/4622 Abutting article or web portions, i.e. edge to edge
• CPC Class Codes: B65H 2301/46222 involving double butt splice, i.e. adhesive tape applied on both sides of the article or web portions
• CPC Class Codes: B65H 2301/4631 Adhesive tape
• CPC Class Codes: B65H 2301/46414 by nipping rollers
• CPC Class Codes: B65H 2406/33 Rotary suction means, e.g. roller, cylinder or drum
• CPC Class Codes: B65H 2406/351 facing the surface of the handled material
• CPC Class Codes: B65H 2601/321 Access
• CPC Class Codes: B65H 2801/21 Industrial-size printers, e.g. rotary printing press

Abstract

The method involves preparing an end of a new band of a new bobbin (6), and fitting a gluing joint on a connection assembly (4). Another gluing joint to be transferred is mounted on the connection assembly corresponding to a bobbin (8) unrolling a completed band. The bobbin (8) is stopped, and a junction is formed by gluing the new band with a section of the completed band using connections of the connection assembly. The unrolling of the new bobbin is started. An independent claim is also included for an end-to-end cutting and gluing device for an unrolling machine.

Claims

1. A process for cutting and end-to-end adhesion for an unrolling machine comprising of two spool holding elements (1) covered in their upper portion by a bridge structure (2) that is able to accommodate an accumulator (3) of sheets and two assemblies (4) for connecting sheets upon stopping, each one coordinated with one spool holding element (1), characterized in that, it essentially consists of preparing the end of the new sheet (5) of a new spool (6) as a background operation and of providing an adhesion joint (7) on a corresponding connection assembly (4) and of possibly then mounting, as a background operation, a second adhesion joint (10) to be transferred on the connection assemblies (4) corresponding to the spool (8) unrolling the ending sheet (9), then in carrying out the stopping of the spool (8) unrolling the ending sheet (9) and carrying out the connection by adhesion of the new sheet (5), followed by the cutting of the ending sheet (9), by moving the connection assemblies (4) together, with the unrolling of the new spool (6) then being initiated.

2. A device for cutting and end-to-end adhesion for an unrolling machine implementing the process in accordance with claim 1, with this machine comprising two spool holding elements (1) covered in their upper portion by a bridge structure (2) able to accommodate an accumulator (3) of sheets and two assemblies (4) for connecting sheets upon stopping, with each one being coordinated with one spool holding element (1), characterized in that, each connection assembly (4) comprises a station (11) for the preparation and transfer of a joint (7 or 10), a device (12) for the holding and cutting of the new sheet (5) or of the ending sheet (9) and, possibly, a device (13) for displacement by moving the sheet connection assemblies (4) together and apart.

3. A device in accordance with claim 2, characterized in that, every station (11) for the preparation and transfer of a joint (7 or 10) is composed of a reception cylinder (14) for the holding and application of a joint (7 or 10) mounted on a swiveling chassis (15) activated by at least one jack (16).

4. A device in accordance with claim 3, characterized in that, the swiveling chassis (15) is present in the form of two lateral arms (19) that are assembled together by traverse units (19), as well as by a swiveling axis (20) of the said chassis (15), with this axis (20) supporting a return cylinder (21) for the new sheet (5) or the ending sheet (9).

5. A device in accordance with either of the claims 3 and 4, characterized in that, the cylinder (14) is a hollow cylinder with a depression provided on a portion of its surface with perforations extending along a sheet parallel to a generator.

6. A device in accordance with claim 2, characterized in that, in the case of the implementation of spool holding elements (1) in the form of supports with swiveling arms, the assemblies (4) for connecting sheets upon stopping are arranged on a fixed station on a central chassis and the jack or jacks (16) for the activation of the swiveling chassis (15) form the device (13) for displacement by moving the said sheet connection assemblies (4) together and apart.

7. A device in accordance with claim 6, characterized in that, it is provided on one side and the other of the chassis for the reception of the sheet connection assemblies (4) with a service channel extending between the said chassis and the supports with swiveling arms.

8. A device in accordance with claim 2, characterized in that, in the case of the implementation of spool holding elements (1) in the form of supports with swiveling arms, the said spool holding elements (1) are each mounted on a mobile support chassis in addition to an assembly (4) connecting sheets upon stopping, with the said mobile chassis being displaceable by moving them together and apart by means of a motorized device.

9. A device in accordance with claim 2, characterized in that, in the case of the implementation of spool holding elements (1) in the form of spool holding towers, the sheet connecting assembly (4) coordinated with every spool holding tower is mounted under the bridge structure (2) in a manner that is displaceable by moving the other sheet connecting assembly (4) together and apart by means of the device (13) for displacement by moving together and apart, which is implemented in the form of a reduction gear motor or other motorized device acting on a means for displacement with reverse entrainment connected with every sheet connecting assembly (4) or, again, in the form of two independent activators each coordinated with one assembly (4).

10. A device in accordance with claim 9, characterized in that, an operating area of the operator is centered between the two spool holding elements (1).

11. A device in accordance with any one of the claims 2 to 5 and 9 and 10, characterized in that, every station (11) for the preparation and transfer of a joint (7 or 10) is additionally provided with a table (17) mounted in a sliding manner in parallel with the sheet connecting assembly (4), on a guide support (17) of the latter and comprising a casing with a depression (171).

12. A device in accordance with claim 11, characterized in that, the table (17) is mounted, by means of its guide support (17′

), on the sheet connecting assembly (4) with the possibility for vertical displacement under the action of a jack (18).

13. A device in accordance with claims 11 and 12, characterized in that, the front surface of the table (17) is made from a flexible material mounted with the possibility of sliding on the casing forming the said table (17).

14. A device in accordance with any one of the claims 2 and 3, characterized in that, the device (12) for the holding and cutting of the new sheet (5) or of the ending sheet (9) is composed of a counterpart (22) for the application of the new sheet (5) or of the ending sheet (9) against a transverse support plate (23) and of a transverse cutting blade (25) with displacement in parallel with or at an angle to the reception cylinder (14) for the holding and application of a joint (7 or 10).

15. A device in accordance with claim 14, characterized in that, the counterpart (22) has the form of a bar mounted between two lateral arms extending on one side and the other of the lateral arms (19) of the chassis (15), and is activated to swivel by at least one jack (24).

16. A device in accordance with any one of the claims 2 to 15, characterized in that, each connection assembly (4) includes, underneath the transverse support plate (23) and the transverse cutting blade (25), retracting units (26) mounted at regular intervals on a reception shaft (27) and activated by swiveling by means of at least one jack (28) solidly connected with the chassis (15) by its strip.

17. A device in accordance with any one of the claims 2 to 16, characterized in that, each connection assembly (4) is additionally provided with complementary retention means extending under the level of the retracting units (26), such as in the form of a complementary aspiration device extending immediately under the said retracting units (26), for example.

18. A device in accordance with any one of the claims 2 to 17, characterized in that, every chassis (15) is provided close to its return cylinder (21) with a low clamp (28) consisting of a fixed roller mounted to swivel on the chassis (15) by means of an arm (280), and is moved to swivel by at least one jack (29).

19. A device in accordance with any one of the claims 3, 5 and 14, characterized in that, the cylinders (14) for the reception, holding and application of a joint (7 or 10) are provided with a motorized device that may consist of one assembly reduction gear motor for every cylinder (14).