Splicing device to join together two web materials, unwinding device comprising said splicing device

• US 8,011,409 B2
• Filed: 09/23/2008
• Issued: 09/06/2011
• Est. Priority Date: 06/18/2004
• Status: Active Grant

• Current Assignee: Fosber S.P.A. (Guangdong Dongfang Precision Science & Technology Co., Ltd.)
• Original Assignee: Fosber S.P.A. (Guangdong Dongfang Precision Science & Technology Co., Ltd.)
• Inventors: Adami, Mauro
• Primary Examiner(s): Osele; Mark A
• Application Number:
  US12/232,705
• Publication Number:
  US 20090071607A1
• Time in Patent Office: 1,078 Days
• Field of Search: 156/157, 156/159, 156/502, 156/504, 156/505, 156/507, 242/551, 242/552, 242/556
• US Class Current: 156/504
• CPC Class Codes: B65H 19/1852 taking place at a distance from the replacement roll
• CPC Class Codes: B65H 19/1863 with translatory or arcuated movement of the roll supports
• CPC Class Codes: B65H 2701/1762 Corrugated
• CPC Class Codes: Y10T 156/12 Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

Abstract

A splicing device to join a first web material coming from a reel being fed (BA), to a second web material (NB), coming from a reel standing by (BB), comprising two heads (107A, 127A; 107B, 127B), each of which comprises: a roller (129A; 129B) associated with a clamping bar (143A, 145A; 143B, 145B) to hold an initial edge of the second web material (NB); a counter-pressure member (109A; 109B) cooperating with said roller (129A; 129B) to press said first and second web material (NA, NB) against each other; a cutting member (111A; 111B); a moving unit (113A; 113B), on which said counter-pressure member (109A; 109B) and said cutting member (111A; 111B) are carried. A first common control member (121) is provided to cause, by the movement it imparts to the moving unit of one or other head alternately: pinching of the first and second web material between the roller (129A; 129B) and the counter-pressure member (109A; 109B); cutting of the first web material; and release of the second web material.

Claims

1. An unwinding device comprising two pairs of uprights;

a pair of crosspieces;

on said crosspieces guides for a pair of carriages carrying vertical arms with tailstocks for axially engaging reels of web material;

a splicing device for splicing together a first web material coming from a first reel being fed and a second web material, coming from a reel standing by;

wherein said splicing device includes two heads, each one of said two heads having a lower half-head and an upper half-head; and

wherein each said lower half-head of said two heads is supported on a different respective one of said pair of carriages; and

the two upper half-heads are supported by a common slide moving along said crosspieces.

2. Unwinding device according to claim 1, wherein each said lower half-head includes a roller associated with a clamping bar to hold an initial edge of the second web material;

each said upper half-head including a counter-pressure member cooperating with said roller to press said first web material and said second web material against each other; and

a cutting member.

3. Unwinding device according to 1, wherein said counter-pressure member and said cutting member of each one of said heads are carried by a moving unit oscillating about an axis.

4. Unwinding device according to claim 3, further comprising control members which control movement of each said moving unit of said heads;

and wherein said control members cause by movement imparted thereby to the moving unit of one or other head of said heads alternately;

pinching of the first web material and the second web material between the roller and the counter-pressure member, cutting of the first web material, and release of the second web material.

5. Unwinding device according to claim 3, wherein each said moving unit of the heads are disposed essentially symmetrically with respect to a plane of symmetry.