Process for connecting a shoe sole to its shaft

Details Process for connecting a shoe sole to its shaft Process for connecting a shoe sole to its shaft

1975-02-25

1976-08-03

Lawson, Patrick D.

Boot and shoe making

Processes

Lasting

12135A, A43D 2100, A43D 300

Patent

active

039720870

ABSTRACT:
Process and apparatus for connecting the sole of a shoe with its shaft, the sole and the shaft consisting at least partially of thermoplastic synthetic resin, wherein the shaft is placed over a mold corresponding in shape to the shape of the sole, an edge of the shaft protruding over the mold and the shaft being expanded in longitudinal direction of the mold, and wherein subsequently the protruding edge of the shaft is bent over the mold and the sole is pressed against the mold and welded with the bent edge by means of radio frequency.

REFERENCES:
patent: 2180234 (1939-11-01), Haber et al.
patent: 3619838 (1971-11-01), Winkler
patent: 3626533 (1971-12-01), Benken et al.

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