Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1983-12-21
1985-06-11
Prescott, A. C.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3R, 15306A, 15345, 346 742, 360 16, 360137, 358301, G03G 1508
Patent
active
045224889
ABSTRACT:
A vacuum cleaning apparatus for a magnetic tape used in a magnetographic printer. The apparatus comprises an elongated nozzle opening in a flat base with a non-conductive screen attached thereto which covers the entire base and nozzle opening. A relatively high vacuum source is connected to the nozzle opening by conduit. The recording surface of the magnetic tape moves in planar contact with the screen in a direction perpendicular to the nozzle opening. Graphite seals are placed at each edge of the screen, the edges with the seals being parallel to the direction of tape movement. The seals direct the flow of air from the upstream and downstream ends of the apparatus to the nozzle opening. The air flow is restricted to that which will flow in and around the woven material forming the screen and along the length thereof to produce a high velocity, turbulent air flow. The high vacuum and low volume of air flow operates quietly and effectively to remove residual toner particles from the tape surface after they have been dislodged by the screen as the tape moves thereby in sliding contact therewith.
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U.S. Patent appln. Ser. No. 515,720 filed Jul. 20, 1983 to R. E. Drews et al.
Chittum Robert A.
Prescott A. C.
Xerox Corporation
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