Bernal Rotary Systems, Inc.

William C Bollinger

Jerry L Bell

Coacting die cylinders with one cylinder having a cutting blade and the other cylinder an anvil surface which when rotating cooperate to cut a blank from a web of low density material. The blade and the anvil surface are tapered in opposite axial directions so that the clearance between them can be readily varied and adjusted by moving the cylinders axially relative to each other. Preferably, the cylinders each have a pair of cylindrical bearers which are in contact and rolling engagement with each other when the cylinders are operating to cut a web of material. The die cylinders are journaled in bearing assemblies carried by the cylinders and removably received in the stand to facilitate easy removal and installation of the die cylinders when desired.

Rotary dies with adjustable cutter force

Rotary apparatus comprising a die cutting station followed by a series of segment forming stations, a levelling station and a winding station continuously works a strip of lead into a configuration suitable for battery grid plates having expanded segments forming reticulations extending inwardly from parallel side edges of the strip to a medial unexpanded portion. The rotary die section includes rotary cutting and stripping dies which perforate the medial portion of the strip. At each segment forming station, a pair of upper coaxial shearing rollers, having peripherally projecting lobes each in the shape of one-half of an expanded segment, are transversely spaced to engage one face of the strip adjacent to the side edges thereof; and each shearing roller, in conjunction with a lower cylindrical supporting roller engaging the opposite face of the strip, has a shearing action thereon as the strip is fed through the station by a feeding roller engaging the perforated medial portion of the strip. The shearing and supporting rollers of successive segment forming stations are mounted in progressive converging relation with the medial portion of the strip. All rollers of the segment forming stations are connected to driving mechanism which rotates them in unison, thereby causing the reticulations to be continuously and progressively developed by shearing the segments thereof downwardly from the plane of the medial portion of the strip. The strip is flattened by rollers at the levelling station and coiled on a reel at the winding station.

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Bloomfield Hills, MI, United States of America

William C Bollinger