Roller system for flattening irregularly shaped, bent pieces...

Metal deforming – By deflecting successively-presented portions of work during... – With feeding of discrete articles or orienting of work...

Reexamination Certificate

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C072S199000, C072S252500, C072S197000, C029S403100

Reexamination Certificate

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06923033

ABSTRACT:
A roller system for flattening irregularly shaped pieces of scrap sheet metal comprises a pair of parallel, horizontally arranged large rollers forming a downwardly converging nip between them. Each roller is formed of curved steel sheets bent to form a cylindrical shape for the rollers. A series of curved, steel liner plates overlay and cover the surfaces of the cylinders. The plates are made of a harder material than the steel sheets. The liner plates on each cylinder are arranged end-to-end and are mechanically fastened to their respective rollers so that the opposite ends of the plates provide a leading edge and a trailing edge. The trailing edge of each plate is chamfered and is arranged against a generally radially directed, blunt edge surface of the leading end of the next plate to form a roughly triangularly shaped in cross-section groove extending longitudinally of the exterior surface of the rollers. One of the rollers is elevated relative to the other roller and pieces of scrap metal are dropped along a chute arranged at an angle to the vertical into the converging nip for squeezing the pieces flat as they pass through the nip between the rollers.

REFERENCES:
patent: 4004479 (1977-01-01), Bodnar
patent: 4504019 (1985-03-01), Newell et al.
patent: 4739641 (1988-04-01), Hering
patent: 5890424 (1999-04-01), Deters
patent: 5911374 (1999-06-01), Biehn

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