Package making – Interrelated or safety controls
Patent
1975-04-23
1977-03-29
Spruill, Robert Louis
Package making
Interrelated or safety controls
53 37, 53 39, B65B 500, B65B 702, B65B 4336
Patent
active
040141543
ABSTRACT:
A packaging system wherein a web of interconnected heat-sealable bags are successively fed to a loading station where the bags are opened by an improved air flow system and loaded. An improved sealing and detaching assembly grips a loaded bag and isolates a region of the bag where a heat seal is to be formed from external forces thereby (1) permitting the formation of a heat seal in bag portions which are relaxed and, therefore, not subject to tearing or distorting, and (2) permitting the assembly to pivot relative to the web to tear off a loaded bag at the same time a heat seal is being formed on the bag. The assembly includes an improved resilient closure bar which, during a forward stroke of travel (1) engages one face of a loaded bag, (2) closes the bag, (3) clamps the opposite bag face against a pair of spaced gripper bars which isolate a region of the bag for heat sealing, and (4) brings the isolated region into contact with a heater bar to effect a heat seal. The gripper bars are spring mounted and biased to a position forward of the heater bar to effectively isolate a region of the bag for sealing prior to seal formation.
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patent: 3473288 (1969-10-01), Nakamura et al.
patent: 3508378 (1970-04-01), Fehr et al.
patent: 3508379 (1970-04-01), Noyes et al.
patent: 3564810 (1971-02-01), Faletti et al.
patent: 3815318 (1974-06-01), Lerner
Automated Packaging Systems, Inc.
Spruill Robert Louis
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