Coating apparatus – With means to apply electrical and/or radiant energy to work... – Electrostatic and/or electromagnetic attraction or...
Patent
1977-03-23
1977-12-13
Stein, Mervin
Coating apparatus
With means to apply electrical and/or radiant energy to work...
Electrostatic and/or electromagnetic attraction or...
346153, 198811, 226 97, 101DIG13, B05C 502
Patent
active
040623211
ABSTRACT:
Apparatus including means for fluidically supporting and guiding a moving, cylindrically formed thin metal belt used in the transport of magnetic particles. Magnet pole pieces disposed adjacent the surface of the belt accommodate formation thereon of a non-translating, rotating bead of dry magnetic ink particles in the application of a uniform ink coating over the belt suitable for printing. The belt is held in substantially fluid tight relation along its opposed edges on bearing means affording rotation of the belt about a fixed, axially extending mandrel including fluid supply cavities and a magnet support cavity. The fluid supply cavities terminate in radially presented recessed orifices for discharging a fluid into a relatively close space provided between the mandrel and the belt, to the side of the latter opposite the surface on which the ink bead is formed by a magnet disposed within the magnet cavity. Introduction of fluid under pressure into the close space causes the belt to assume such shape and rigidity as is afforded by a solid cylinder, while maintaining optimum magnet-to-belt spacing.
REFERENCES:
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patent: 3267840 (1966-08-01), Honma et al.
patent: 3273496 (1966-09-01), Melman
patent: 3435441 (1969-03-01), Stahler
patent: 3495268 (1970-02-01), Hunst
patent: 3620430 (1971-11-01), Baumann
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patent: 3741790 (1973-06-01), Wu
RCA Technical Notes, Levine et al., "Flotation and Edge Guiding of Paper Web for Electrostatic Printing Press," No. 457, Sept. 1961.
Kapustin Sheldon
Scott Thomas J.
Sperry Rand Corporation
Stein Mervin
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