EP 0285904 B1 19910123 - METHOD AND MACHINE FOR THE PRODUCTION OF PLASTIC CARRYING BAGS IN PAIRS FROM A PLASTIC WEB WITH A SIDE SEAM
Title (en)
METHOD AND MACHINE FOR THE PRODUCTION OF PLASTIC CARRYING BAGS IN PAIRS FROM A PLASTIC WEB WITH A SIDE SEAM
Publication
Application
Priority
- DE 3711165 A 19870402
- DE 8715327 U 19871119
- DE 8801173 U 19880201
Abstract (en)
[origin: US4906228A] The invention relates to a process and apparatus for the paired manufacture of carry bags from synthetic resin sheeting with lateral weld seams and an approximately sinusoidal load-bearing rim with punched-in handle openings, wherein a laid-flat tubular film is cut open in wave shape, and the two cut-apart semitubular sheets (1a, 1b) are pulled apart transversely to the conveying direction, the wave crests are folded over at least in part in parallel to the folding edges (3) in each case either toward the outside or toward the inside, then the semitubular sheets are again united in order to compensate for at least a portion of the gap S produced by folding over the flaps, and after achieving a synchronous run of the folded over flaps (51, 52), the latter are welded to the lower and upper sheet layers (10a, 10b) of the semitubular sheets (1a, 1b) in the area (15) surrounding the subsequent handle opening (4), the wave crests, prior to being folded over, being electrically discharged and, after having been folded over, being again charged electrically prior to the provision of the weld bond.
IPC 1-7
IPC 8 full level
B31B 23/00 (2006.01); B31B 50/86 (2017.01); B65D 33/02 (2006.01); B65D 33/08 (2006.01)
CPC (source: EP US)
B31B 70/00 (2017.07 - EP US); B65D 33/02 (2013.01 - EP US); B65D 33/08 (2013.01 - EP US); B31B 70/18 (2017.07 - EP US); B31B 70/872 (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); B31B 2160/106 (2017.07 - EP US); Y10S 493/926 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
US 4906228 A 19900306; AU 1336688 A 19881006; AU 600347 B2 19900809; CA 1282987 C 19910416; DE 3861609 D1 19910228; EP 0285904 A1 19881012; EP 0285904 B1 19910123; JP S6464835 A 19890310
DOCDB simple family (application)
US 17645388 A 19880401; AU 1336688 A 19880322; CA 561711 A 19880317; DE 3861609 T 19880323; EP 88104597 A 19880323; JP 8112788 A 19880401