Typewriting machines – Type-bar-action mechanism or type-face on type-bar or... – For top-strike typewriter
Patent
1989-02-13
1990-04-24
Eickholt, Eugene H.
Typewriting machines
Type-bar-action mechanism or type-face on type-bar or...
For top-strike typewriter
400425, 1525652, B41K 3500
Patent
active
049195549
ABSTRACT:
A calendering and brush roller assembly that may be easily integrated into a screen process printing machine and which utilizes a novel vacuum cleaning system in combination with brush rollers which not only removes the agglomerated lithographic powder from the printing stock but also removes the powder from the crush roller assembly to either minimize or entirely obviate the requirement for frequent periodic cleaning of the assembly. The crush roller assembly of the present invention is designed to crush litho printing powder normally used to dry ink. The powder otherwise interferes with coating applied to printed material to provide a durable surface such as on magazine covers and colored posters. If the powder is not either wiped off or crushed before the coating is applied, the result is the formation of bumps of agglomerations which make the coating surface rough and interferes with the desired glossy surface. The crush roller assembly of the present invention comprises two crushing rollers and two brush rollers. A lower crush roller is driven and is a chrome plated steel roller. The upper crush roller is meshed by gears to the lower crush roller and is also a chrome plated steel roller and is moveable in a vertical direction to be selectively engageable with the lower crush roller. A brush roller is associated with each such crush roller and is designed to wipe the powder off the crush rollers. The crush roller assemly is contained within a selectively openable safety housing which is also designed to substantially enclose the roller assembly for permitting the application of a vacuum system, the intake portion of which comprises a pair of plenums having a series of apertures distributed in an array adjacent the brush roller for suctioning the crushed powder from the brush rollers.
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Eickholt Eugene H.
Ernst W. Dorn Co., Inc.
Tachner Leonard
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