Global Patent Index - EP 1021339 A1

EP 1021339 A1 2000-07-26 - APPARATUS FOR THE HEAT-WELDING OF THE SUPERIMPOSED EDGES OF THERMOPLASTIC FILM

Title (en)

APPARATUS FOR THE HEAT-WELDING OF THE SUPERIMPOSED EDGES OF THERMOPLASTIC FILM

Title (de)

VORRICHTUNG ZUM WÄRMESCHWEISSEN DIE AUFLIEGENDE KANTEN EINES THERMOPLASTISCHEN FILMS

Title (fr)

APPAREIL POUR LE THERMOSOUDAGE DE BORDS SUPERPOSES DE FILM THERMOPLASTIQUE

Publication

EP 1021339 A1 (EN)

Application

EP 99936536 A

Priority

  • EP 9905002 W
  • IT BO980488 A

Abstract (en)

[origin: WO0007882A1] The product (P) to be heat-welded is inserted between a pair of conveyors which are arranged one above the other and are both motorized and horizontal, the upper conveyor (2) performing the opposing function, while the lower conveyor (1) is formed by a plurality of spaced parallel rollers (14) arranged in succession and having a body (214) made of suitable resilient and yielding material such that, as a result of the pressure exerted by the said opposing conveyor, the rollers of the lower conveyor are deformed and are adapted to the irregularities on the bottom surface of the packaged tray and this surface is subjected to a uniformly distributed pressure. Some of the rollers (14'') of the lower conveyor may oscillate about a parallel axis, in opposition to resilient means (20) which keep them raised, so that these rollers may exert a correct degree of pressure also on the front side and on the rear side of the packaging. The heat for the heat-welding operation is produced by infrared-ray generators (32) which are located underneath the rollers of the lower conveyor (1) and which emit radiation at a wavelength suitable for the film to be welded.

IPC 1-7 (main, further and additional classification)

B65B 51/00; B65B 51/09

IPC 8 full level (invention and additional information)

B29C 65/00 (2006.01); B29C 65/02 (2006.01); B65B 51/10 (2006.01); B65B 59/00 (2006.01); B29C 35/08 (2006.01); B29C 65/14 (2006.01)

CPC (invention and additional information)

B65B 59/005 (2013.01); B29C 65/02 (2013.01); B29C 66/53461 (2013.01); B29C 66/81241 (2013.01); B29C 66/81457 (2013.01); B29C 66/81812 (2013.01); B29C 66/83411 (2013.01); B29C 66/83431 (2013.01); B65B 51/10 (2013.01); B29C 65/14 (2013.01); B29C 65/1412 (2013.01); B29C 2035/0822 (2013.01)

Citation (search report)

See references of WO 0007882A1

Designated contracting state (EPC)

BE DE ES FR GB NL

EPO simple patent family

WO 0007882 A1 20000217; EP 1021339 A1 20000726; IT 1304474 B1 20010319; IT BO980488 A1 20000207

INPADOC legal status


2003-07-23 [18R] REFUSED

- Effective date: 20020606

2001-04-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010219

2000-07-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000306

2000-07-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB NL