Patent ID: 6923033
Filing Date: 2005-08-02
Classification: B30B,Y10T

Abstract:
1. A roller system for flattening irregularly shaped and bent pieces of scrap sheet metal comprising: a pair of cylindrical, closely arranged, parallel rollers having longitudinally directed, parallel axes of rotation, said rollers forming a converging nip between them, with the nip having a wide entry opening for receiving pieces of scrap sheet metal placed in the nip and a narrow gap exit opening between the rollers for squeezing and flattening the pieces; said rollers each being formed of curved metal sheets assembled into a cylindrical shape to provide cylindrical exterior surfaces; a series of curved, hard steel, liner plates conforming to the curvatures of, and overlying the cylindrical surfaces of each of said rollers and being rigidly secured to said rollers; the plates having longitudinally directed opposite ends and the plates, on each roller, being arranged in end-to-end relationship to form on each plate a leading edge and a trailing edge corresponding to the directions of rotations of the respective rollers; said leading edges being approximately radially oriented relative to the center of curvatures of the curved surfaces of the rollers and being substantially of the same thickness as their respective plates; said trailing edges being chamfered so as to form together with their adjacent leading edges approximately triangular in cross-section grooves extending longitudinally along the exterior surface of the plates of the respective rollers; whereby pieces of scrap sheet metal placed into the wide entry opening of the nip tend to be moved towards the narrow gap by the leading edges of the respective grooves.