Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1975-11-14
1978-12-05
Coan, James F.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
93 84FF, 93 93HT, 156512, 156558, 156563, B31B 2300
Patent
active
041280490
ABSTRACT:
Sections successively severed from a double layer web of synthetic thermoplastic film, e.g., flattened tube stock, as produced are each stacked and welded to a precedingly stacked section near one edge, or in a tear off part or hanger portion to which a bag portion of the section is attached; forming ultimately a pad of bag sections, wherein each section includes either a complete bag or a partially completed bag, in the latter case with certain final bag producing operations carried out simultaneously for all bags already brought together and preferably welded together in a pad structure.
Apparatus is disclosed including various web welding, seaming, perforating and/or severing devices operating in horizontal planes upon a preferably vertically fed stock web, and below the aforesaid devices, either associated with a welding beam element or independently thereof, devices for adding each successive bag to a stack with welding to a proceeding bag, and as well a lay off table for grippingly accepting a desired finished bag pad and laying it off onto a horizontal running, product-discharging conveyor belt. Apparatus variations are disclosed for carrying out certain of the above and other operations on the web, while horizontal or vertical, before severance of sections, e.g., in carrying out methods of producing a plurality of bags simultaneously from a wide web stock continuously longitudinally divided into a corresponding plurality of narrower "sub-webs".
REFERENCES:
patent: 2973797 (1961-03-01), Sylvester
patent: 3210908 (1965-10-01), Samberg
patent: 3384528 (1968-05-01), Lehmacher et al.
patent: 3431828 (1969-03-01), Crawford et al.
patent: 3587410 (1971-06-01), Dechanciaux
Coan James F.
Striker Michael J.
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