Boot and shoe making – Sole and/or heel edge trimming machines – Clamped work
Patent
1975-05-15
1977-03-08
Lawson, Patrick D.
Boot and shoe making
Sole and/or heel edge trimming machines
Clamped work
A43D 700
Patent
active
040105024
ABSTRACT:
Apparatus for processing the margins of work, both circular and non-circular, has a rotatable work holder provided with a clamping member to clamp work against a template. The processing is typically that of bringing the work to the size and shape established by the template and is effected by at least one tool. The disclosed apparatus has a pair of tools, both rotatable and each having a different function and the tools and their drive are carried by structure provided with means to reciprocate it between an inoperative position and a position in which the tools are in engagement with the periphery of the work. When the work is non-circular, the work holder and its drive so turn the work that its periphery advances into contact with the tools at a controlled rate. When work is to be processed without turning it two or more times, it is so turned that the zone first engaged by the tools is again engaged by them before the work holder is stopped in its predetermined starting position and, in the disclosed embodiment, the work holder is first moved to a predetermined minor extent in a reverse direction and is then rotated in a forward direction until the predetermined starting position is twice reached. The tool unit, its drive and that for the work holder are within a cabinet having a door behind which the tool unit is located. Control means provide that, first, the work is clamped in the work holder and, then, the door opened, the work holder rotated and the tool unit advanced into contact with the work. After the work has been processed, the sequence is reversed. A work locator is shown for use when it is desirable to ensure that the work is accurately positioned relative to the template before it is clamped thereto.
REFERENCES:
patent: 2359395 (1944-10-01), Stacey
patent: 3134998 (1964-06-01), Kunze et al.
patent: 3798693 (1974-03-01), Bruggi
Beck, Jr. Alfred E.
Cushing Richard D.
Circle Machine Co., Inc.
Lawson Patrick D.
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