Boot and shoe making – Miscellaneous – Assembly machines
Patent
1976-04-12
1976-11-23
Lawson, Patrick D.
Boot and shoe making
Miscellaneous
Assembly machines
A43D 0000
Patent
active
039927431
ABSTRACT:
A roughing machine for roughing the margin of an upper that is moved past a roughing tool of the roughing machine. The roughing tool is incorporated in a roughing tool assembly that is yieldably urged downwardly against the upper margin under relatively low pressure. A damper mechanism has a follower element in engagement with the roughing tool assembly. The damper mechanism is so constructed that the follower element provides a resistance to upward movement of the roughing tool assembly of a relatively high magnitude and a downward force of a relatively low magnitude is imparted to the follower element.
REFERENCES:
patent: 3780390 (1973-12-01), Braum
patent: 3843985 (1974-10-01), Leonhardt
patent: 3932907 (1976-01-01), Vornberger
Gordon Albert
International Shoe Machine Corporation
Lawson Patrick D.
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