Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1984-08-20
1986-09-02
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29116R, 29130, 29132, B21B 1302, B21B 2702
Patent
active
046087370
ABSTRACT:
A magnet roll for use in a developer unit of an electrostatic copier having a magnet structure provided by elongated bars of permanent magnet material magnetized to provide radially oriented magnets. The bars are sufficiently rigid to support hubs without the need for a core. A cylindrical shell of conductive material is rotatably mounted on the magnet structure by shafts which are either journaled in or on the hubs of the magnet structure. The bars are made of conductive plastic or ceramic or elastomeric material (rubber) having permanent magnet material therein which is polarized to provide magnetic poles along the axis of the cylindrical shell which are magnetized in a radial direction with respect to the axis. The elastomeric (rubber) magnet bars have a rigid (steel) backing. The entire roll may be fabricated, essentially from plastic material and at low cost.
REFERENCES:
patent: 3152924 (1969-10-01), Wanielizta et al.
patent: 4041901 (1977-08-01), Rarey et al.
patent: 4142281 (1979-03-01), Muller
patent: 4330193 (1982-05-01), Stange
Product Bulletin-SUMIGAUSS; Sumitomo Bakelite Co., Ltd.
Product Bulletin-Koroseal; BF Goodrich Company, Akron, Ohio (FPD-80-FP-1001).
Guide of Permanent Magnets; Cat. No. M1001; Sumitomo Special Metals Co., Ltd. (7/1980).
Kosmider Ronald T.
Parks Dale B.
Goldberg Howard N.
Lukacher Martin
Magnetic Technologies Corp.
Wallace Ronald S.
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