Fluid lasting of shoes and similar operations
OwnerAlbert Warner Armstronginventor
Life of this patent
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Abstract
Apparatus for lasting of shoes has an elastic and flexible pad disposable in a cavity provided in a suitable housing. A portion of the pad is relieved for conforming to the configuration of a shoe last suspended in the housing cavity. Proper relieving of the pad permits same to stretch nonuniformly to conform to the irregular configuration of the last when a substantially uniform fluid pressure is applied to the pad, and this conforming of the pad to the last forces an upper arranged between the pad and last to be wiped over edges of the last and into contact with an insole disposed on the last for facilitating the securing of the upper to the insole.
Claims10
Apparatus for lasting of a shoe, comprising, in combination:
- a. a housing provided with a cavity;
- and
- b. an elastic and flexible pad arranged in the cavity, a portion of the pad associated with the shank area of the last being relieved for conforming to the configuration of a shoe last arrangeable in the housing cavity, the pad stretching non-uniformly to conform to the irregular configuration of the last, including the shank area, when fluid pressure is applied to the pad.
An elastic and flexible pad for use in the fluid lasting of shoes in a sealed housing, the pad comprising a relieved portion corresponding to the shank of a foot for conforming to the configuration of the shank area of a last disposed in the housing cavity, the pad stretching non-uniformly to conform to the irregular configuration of the last, including the shank area, when fluid pressure is applied to the pad, the pad being relieved by being of unequal thickness, the thickness being varied for permitting the pad to stretch unequally when subjected to an equal pressure and conform to the last.
A method for lasting shoes, comprising the steps of:
- a. relieving a portion of an elastic and flexible pad for permitting certain portions of the pad to stretch more than other portions;
- b. placing a last adjacent the pad, with the shank area of the last associated with the relieved portion of the pad;
- c. attaching an insole to the last;
- d. arranging an upper of a shoe between the last and the pad;
- e. applying an equal pressure to the pad and causing the pad to surround the last and wipe the upper over edges of the last and into contact with the insole;
- and
- f. securing the upper to the insole while the upper is being wiped over the edges of the last.
Dependencies are inferred from the claim text.