Bag making machine

Details Bag making machine Bag making machine

1989-08-09

1991-04-23

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Automatic and/or material-triggered control

156361, 156366, 156515, 493194, 493203, 83210, B32B 3100, B26D 520

Patent

active

050097407

ABSTRACT:
A machine including a control system having a timer for producing bags made from thermoplastic resin films of varying thickness. A pair of feed rollers intermittently feeds a continuous flat tubular web of thermoplastic resin between an upper heat sealing bar and a lower sealing surface. The sealing bar, which approaches but does not contact the web, is heated to effect a weld bead on the web, a cutting edge severs the web adjacent the bead, and the feed rollers advance the web as the sealing bar and cutting edge are withdrawn. A sequencer provides timed control of a motor that operates the rollers and another motor that operates the sealing bar and cutting edge.

REFERENCES:
patent: 3902954 (1975-09-01), Lotto
patent: 4011975 (1977-03-01), Brown
patent: 4047992 (1977-09-01), Williams
patent: 4077306 (1978-03-01), Wech
patent: 4101363 (1978-07-01), Lotto
patent: 4128985 (1978-12-01), Simmons
patent: 4131503 (1978-12-01), Plate
patent: 4737904 (1988-04-01), Ominato
patent: 4854928 (1989-08-01), Fukuyama

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