Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Patent
1978-09-18
1980-03-25
Hill, Ralph J.
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
134 35, 209 11, 209173, B08B 310
Patent
active
041949269
ABSTRACT:
Plastic film cartridges generally comprise a variety of component parts plus a label affixed by adhesive to the cartridge housing. The cartridge housing (a plastic) is recyclable when the label and adhesive are removed and the housing is separated from the other non-compatible plastic and non-plastic cartridge components. In accordance with the invention, multi-stage reclaiming apparatus and method is disclosed wherein film cartridges are first rough chopped to provide physical separation of the cartridge components. The cartridge housing pieces are separated from other cartridge components on the basis of differences in specific gravity in a series of specific gravity separation tanks. To remove the labels and adhesive from the housing pieces, a separation tank contains a detergent solution capable of assisting in dissolving the adhesive. The tank is provided with a group of heating elements to cause the detergent solution to boil in the immediate vicinity thereof. As housing pieces travel past the heating elements they are rolled around, swirled and submerged and each housing piece with a label portion adhered thereto is exposed to the boiling detergent solution. The adhesive is thus dissolved and the label portions are driven off the housing pieces.
REFERENCES:
patent: 675833 (1901-06-01), Jones
patent: 2764289 (1956-09-01), Scheid
patent: 3544369 (1970-01-01), Keogh
patent: 3868960 (1975-03-01), Cove et al.
patent: 3968572 (1976-07-01), Stuchberry
Eastman Kodak Company
Gremban Steve W.
Hill Ralph J.
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