Heel laster

Details Heel laster Heel laster

1989-06-13

1990-07-10

Meyers, Steven N.

Boot and shoe making

Lasting machines

Nipper stretcher

12 12, 12 125, A43D 2116, A43D 2100

Patent

active

049398059

ABSTRACT:
A heel laster to receive a footwear upper assembly and constructed to press, form and last the heel part of the footwear upper assembly. A structure is provided to secure the assembly to the laster; princers stretch the heel part of the upper about the heel region of the last; and a heel pad presses the upper against the last. Then a nozzle is moved and positioned by a mechanical structure along an appropriate adhesive path. The mechanical structure includes a tracer mechanism the includes an adjustable U-shaped cam track and a linkage connected to the nozzle at one end and to a cam follower at the other end thereof such that the cam follower is positioned within the cam track; a driver mechanism is connected to propel the cam follower along the track in the X-Y directions (the nozzle can move in the Z-direction as well to follow contours of the footwear). The heel pad is preferably an inflatable pad. The mechanical tracer mechanism, as a unit, has a predetermined and fixed position relative to the heel pad. The heel laster operates in two steps: first, the pad is pressed against the heel of the upper and, second, the pad is inflated to press into any crevices a the upper surface at the heel region (and the shank region). Then the upper is wiped onto the insole of the assembly.

REFERENCES:
patent: 3255475 (1966-06-01), Ralphs
patent: 3256543 (1966-06-01), Ralphs
patent: 3868737 (1975-03-01), Fichtner et al.
patent: 4404700 (1983-09-01), Berrill et al.
patent: 4653133 (1987-03-01), Giebel
patent: 4654914 (1987-04-01), Leeper
patent: 4679269 (1987-07-01), Becka et al.
patent: 4728378 (1988-03-01), Bianchi

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