Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With cutting – punching – piercing – severing – or tearing
Patent
1975-09-10
1977-04-26
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With cutting, punching, piercing, severing, or tearing
93 33H, 156250, 156290, 156515, 156583, B32B 3100
Patent
active
040199479
ABSTRACT:
A multipurpose sealing and severing mechanism for a bag machine capable of providing one or more seals in thermosealing wrapping material, and severing or perforating the material adjacent the seal area. The mechanism may readily be adapted to produce side weld bags from longitudinally folded wrapping material; open end first bags from tubular wrapping material; closed end first bags from tubular material; or sheets from single or multiple webs. The mechanism includes a stationary sealing head and a reciprocating sealing head each of which includes a pair of spaced resistance wire heaters with an oscillating cutter or perforator movable therebetweento either completely sever or merely perforate the material. Resiliently loaded, segmented film clamps extend parallel to and immediately adjacent the cutter and apply a holding force on both sides of the cutter throughout the length of cut during the severing operation to thereby firmly clamp the web preventing undesirable stresses from being applied to the seal area during the severing operation.
REFERENCES:
patent: 3257256 (1966-06-01), Lehmacher et al.
patent: 3384528 (1968-05-01), Lehmacher et al.
patent: 3775225 (1973-11-01), Schott
patent: 3813998 (1974-06-01), Lotto
Stock David K.
Wech Robert J.
FMC Corporation
Moore A. J.
Simmons David A.
Tripp C. E.
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