Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1974-12-16
1976-06-15
Coan, James F.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
93 8W, 93 368, 93 541, 156192, 156195, B31B 3900
Patent
active
039629597
ABSTRACT:
Disclosed is a method for manufacturing flexible containers for use in transportation, storage and handling of flowing materials wherein one edge of a length of flexible sheet material is positioned on a cylindrical mandrel. Next, the edge is affixed to the mandrel with a first length of double-backed adhesive tape and extending the double-backed adhesive tape beyond the width of the sheet material and onto the ends of the mandrel. The mandrel is then rotated to wrap the sheet material about the mandrel to overlap and adhere to the first length of adhesive tape to form the first cylindrical wall. A second length of double-backed adhesive tape is applied on the exterior of the sheet material extending from the first wall. The mandrel is rotated to wrap the material about the first cylindrical wall to overlap and adhere to the second length of adhesive tape to form a second cylindrical wall. The sheet material is severed at the edge of the second wall. The first wall is gathered at one end and is tied. The second wall is gathered at said one end and is tied. An adhesive material is applied to the exterior of said second wall adjacent said first end. A filament is wrapped in a helix about said second wall and adhesively attached to the second wall. A sling is positioned around the exterior of said second wall with the gathered ends of said first and second walls within first and second concentric circular portions on said sling, and with support loops joined to said circular portions and extending along the exterior surface of the second wall. An outer covering is adhesively attached and around the exterior of said sling. According to a second embodiment, the inner and outer walls are formed on said mandrel by positioning first and second concentric cylindrical walls on said mandrel, and thereafter performing the steps of the first embodiment.
REFERENCES:
patent: 2008218 (1935-07-01), McColl
patent: 2951003 (1960-08-01), Stephens
patent: 3374929 (1968-03-01), Silfverskiold
patent: 3788918 (1974-01-01), Poulsen
patent: 3789897 (1974-02-01), Saito
Better Agricultural Goals Corporation
Coan James F.
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