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Title: Shoe stiffener
Abstract:
A strip which will form a rigid shoe stiffener, such as a shoe shank, is applied to the surface of a shoe to be stiffened, such as to the bottom of the insole. The shank strip is flexible and includes a carrier sleeve containing a plurality of fiberglass strands in an externally activatable thermosetting plastic matrix. The sleeve is formed from a pair of sheets of material which are bonded to each other along their lateral, longitudinally extending margins to seal the strip as well as to provide a means by which the strip may be handled and maintained in place on the shoe bottom during activation of the strip. The margins are heat sealed in a doubled-over, folded configuration which insures that the margins will not curl over and will remain substantially flat, to facilitate handling of the strip.
Other info: Inventors: Darrin, John W. (Reading, MA, US) Application Number: 845837 Filing Date: 1977-10-26 Publication_date: 1979-07-31 Assignee: Bush Universal, Inc. (Woburn, MA) Primary Class(es): 36/76R 12/146S, 428/480 Other Classes: US Patent Ref:
Other Refs:
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