Method of making parts for a magnetic cylinder

Details Method of making parts for a magnetic cylinder Method of making parts for a magnetic cylinder

1989-01-19

1990-05-01

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Assembling or joining

29525, 29125, B21D 3900, B23P 1902

Patent

active

049206303

ABSTRACT:
A magnetic cylinder is formed by stacking ferromagnetic pole disks to which spacer rings are fastened. A circular array of tabs are pierced from the plane of the pole disks. the tabs are angulated relative to said plane and they diverge radially outwardly but their edges terminate on a circle concentric to the rim of the disk to provide a margin on which a concentric spacer ring is applied and is secured to the pole by pressing the tabs back toward the plane of the pole so they wedge tightly against the spacer ring. Permanent magnets are applied to the poles between adjacent pairs of tabs and they form parallel axially extending rows of magnets when the poles are stacked. At least one row is comprised of magnets which are stronger than the other to more forcefully hold down the edges of a die cutting plate of a printing plate which is wrapped around the magnetic cylinder.

REFERENCES:
patent: 3097598 (1963-07-01), Hotop et al.
patent: 3742852 (1973-07-01), Leffler et al.
patent: 4676161 (1987-06-01), Peekna
patent: 4811474 (1989-03-01), Maucher et al.

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