Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1979-09-17
1981-10-20
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
53373, B30B 502
Patent
active
042959225
ABSTRACT:
This relates to a heat sealer which is particularly adapted for sequentially heat sealing opposite edge portions of a web which has been formed into a tubular configuration. The heat sealer functions after each advancement of the web to seal a portion of the longitudinal side seam of the tube while a forward portion of the tube is cut off and the bottom thereof heat sealed to form a bag. The heat sealer is constructed to simultaneously form heat seals along side seams of two tubes and includes support members for supporting heat sealing members for movement together and then apart to effect the necessary heat sealing operation and then the release of the heat sealed portion. The heat sealer is carried by a wall of the machine and the support members are mounted for axial movement in unison and in opposite directions by drive means which include a fluid pressure device urging the heat sealing members to close to operative positions and a mechanical mechanism for overrriding the pressure device and urging the heat sealing members to open positions.
REFERENCES:
patent: 2955643 (1960-10-01), Shapero et al.
patent: 2956611 (1960-10-01), Jendrisak
patent: 3154901 (1964-11-01), Hayward
patent: 3431700 (1969-03-01), Rausing et al.
patent: 3668815 (1972-06-01), Henry et al.
patent: 3986921 (1976-10-01), Putnam
patent: 4167435 (1979-09-01), Olschewski
Brown Charles E.
Developak Corporation
Simmons David A.
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