EP 0215269 B1 19890111 - DEVICE FOR THE PRODUCTION OF BAGS
Title (en)
DEVICE FOR THE PRODUCTION OF BAGS
Publication
Application
Priority
DE 3531457 A 19850903
Abstract (en)
[origin: US4734088A] Apparatus for severing bags from a two-ply web of thermoplastic material. The apparatus includes web guide rollers defining a nip, and a plurality of peripheral grooves in the guide rollers in which upper and lower air directing tubes are positioned to guide a web as it passes downstream of the feed rollers. A continuously transversely moving severing knife is provided downstream of the feed rollers and below the plane defined by the moving web. A pair of welding jaws are provided adjacent the cutting knife to grip the web in a plane below the web movement plane to weld the plies of the web together and to deflect the web into position for providing a transverse cut therein by means of the severing knife. A pivot lever is provided to pivot downstream ends of the lower air directing tubes in a downward direction to prevent interference between the downwardly deflected web and the downstream ends of the air directing tubes. A set of clamping jaws is provided on the opposite side of the severing knife from the welding jaws in order to securely hold the web during the cutting operation.
IPC 1-7
IPC 8 full level
B31B 19/14 (2006.01); B31B 23/00 (2006.01); B31B 70/00 (2017.01); B31B 155/00 (2017.01); B31B 160/10 (2017.01)
CPC (source: EP US)
B31B 70/00 (2017.07 - EP US); B31B 70/64 (2017.07 - EP US); B31B 70/14 (2017.07 - EP US); B31B 2155/00 (2017.07 - EP US); B31B 2155/003 (2017.07 - EP US); B31B 2160/10 (2017.07 - EP US); Y10T 83/8822 (2015.04 - EP US); Y10T 156/1313 (2015.01 - EP US)
Designated contracting state (EPC)
BE FR GB IT
DOCDB simple family (publication)
EP 0215269 A1 19870325; EP 0215269 B1 19890111; CA 1264421 A 19900116; DE 3531457 A1 19870312; DE 3531457 C2 19900329; DK 160686 B 19910408; DK 160686 C 19910923; DK 419986 A 19870304; DK 419986 D0 19860902; US 4734088 A 19880329
DOCDB simple family (application)
EP 86110779 A 19860804; CA 517332 A 19860902; DE 3531457 A 19850903; DK 419986 A 19860902; US 90317786 A 19860903