Process for stiffening flexible sheet material

Details Process for stiffening flexible sheet material Process for stiffening flexible sheet material

1977-06-14

1978-12-05

Lawson, Patrick D.

Boot and shoe making

Processes

Miscellaneous parts

A43D 0000

Patent

active

041279107

ABSTRACT:
Process for stiffening a selected are of flexible sheet material, particularly a part such as the counter portion of a shoe upper, in which a predetermined quantity of hot molten resin is deposited on the area as a body of substantial thickness, the area is pressed to spread out and adhere the resin as a layer and thereafter the resin is cooled to a stiff resilient condition. The sheet material may be removed from the first pressing operation and subjected to a second pressing or molding operation around a form such as a last. In this second pressing, molten resin which has been squeezed from the area onto the lasting margin, by controlled conditions in the first pressing may be employed as lasting cement by wiping down the lasting margin against the bottom surface of an insole.

REFERENCES:
patent: 3316573 (1967-05-01), Chaplick et al.
patent: 3973285 (1976-08-01), Babson et al.

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