Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-04-26
1993-02-23
Aftergut, Jeff H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156209, 156292, 1563084, 1563099, 156499, 156471, 156498, 156555, 425388, B32B 3112
Patent
active
051886910
ABSTRACT:
An improved apparatus and method for producing fully air-cushioning dunnage from two sources of flexible thermoplastic film. This improved apparatus and method provides a fully air-filled dunnage by maintaining a forming roller (16) at a cold temperature. The outer surface (33) has a thermo-resistive layer (32) completely convering its periphery absent a plurality of cavities (30) formed therein. A first film (12) is heated then thermoformed into said cavities (30). The thermoformed portions of the film contact the cold cavities in the forming roller to cool both the film and the air in the cavities to a cold temperature. The heat welding surface of first film (12) is kept at an elevated temperature by the thermo-resisitive layer. A second film (20) is heated and welded to said first film by and with an adjustable heated pressure roller (24). The heat traveling through the second film and the first film is delayed for a predetermined amount of time by the thermo-resistive layer. Subsequently the laminated first film and second film are cooled to a set temperature by the conduction of heat through the thermo-resistive layer into the cold forming roller. The air filled dunnage is then removed from the forming roller and contacts a chill roller whereat the second film is chilled to prevent any premanent thermal distortion of said air filled cells.
REFERENCES:
patent: 3208898 (1965-09-01), Chavannes et al.
patent: 3655486 (1972-04-01), Hagino et al.
patent: 4412879 (1983-11-01), Ottaviano
patent: 4576669 (1986-03-01), Caputo
patent: 4579516 (1986-04-01), Caputo
Aftergut Jeff H.
Pinto Patrick J.
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