Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1978-02-16
1980-04-01
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
53412, 53416, 156 92, 15624411, 15624413, 15624424, 222 92, 222107, 222527, 222528, 222529, 222530, 222536, B65D 3508
Patent
active
041960300
ABSTRACT:
A method of making an extruded construction for bags, comprising forming in an integral one piece plastic extrusion a flexible collapsibly foldable thin wall closure web area joined at its opposite ends to proximal ends of a pair of pull flange portions of substantial length, and as part of the extrusion forming separable resiliently flexible interlocking complementary fastener profiles adjacent to said proximal ends; collapsibly folding the closure web area away from the flange portions and the profiles, coupling the fastener profiles together, and enveloping the collapsibly folded closure web area within bag body side wall panels having end parts joined to the extrusion adjacent to the profiles. The side wall panels may be extruded integrally with the closure web area, the flange portions and the fastener profiles; or the side wall panels may be separately formed and sealed to the collapsibly folded closure web area or the flange portions adjacent to the profiles. The profiles may be extrusion molded on the pull flange portions or may be extrusion molded on the closure web area closely adjacent to the pull flange portions or may, in effect, be extrusion molded to the pull flange portions and the closure web area where they join together. Especially where the profiles are on the pull flange portions, the profiles may be efficiently cooled from both sides of the respective flange portions following the extrusion.
The collapsibly folded closure web area may be formed into a funnel spout element for each bag or may serve simply as a hermetic seal until it is desired to open the associated bag which has been formed by hermetically sealing as necessary along edges of the side wall panels.
REFERENCES:
patent: Re26991 (1970-11-01), Luca
patent: Re29331 (1977-08-01), Naito
patent: 3380481 (1968-04-01), Kraus
patent: 3746215 (1973-07-01), Ausnit et al.
patent: 3945872 (1976-03-01), Noguchi
Minigrip Inc.
Weston Caleb
LandOfFree
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