Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-09-30
1977-05-10
Whitby, Edward G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
24201R, 156198, 156200, 156244, 156251, 156259, 156498, 264 95, 425327, 425392, B32B 704
Patent
active
RE0292087
ABSTRACT:
A method and apparatus for manufacturing a tube to be used for forming plastic reclosable bags including means for extruding a continuous annular tube of plastic with circumferentially spaced axially extending interlocking rib and groove profiles on the surface from a die shaped to form the tube and profiles, means for delivering tube separating air through the die into the tube interior, means for delivering a flow of outside cooling air around the outer surface of the tube to cool the tube at a rate to maintain the profiles on the surface of the tube and drawing means positioned for receicing the tube and drawing it from the die and flattening it.
REFERENCES:
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patent: 2616127 (1952-11-01), Pfeiffer et al.
patent: 2668324 (1954-02-01), Johnson
patent: 2740740 (1956-04-01), Binnall
patent: 2750631 (1956-06-01), Johnson
patent: 2762421 (1956-09-01), Quinche et al.
patent: 2852813 (1958-09-01), Longstreth
patent: 2955321 (1960-10-01), Fortner et al.
patent: 2978748 (1961-04-01), McCauley et al.
Kabushiki Kaisha Seisan Nihon Sha
Whitby Edward G.
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