Printing – Stenciling – Rotary machines
Patent
1990-11-30
1992-08-25
Crowder, Clifford D.
Printing
Stenciling
Rotary machines
1011284, B41L 1306
Patent
active
051408988
ABSTRACT:
Stencil duplicator comprising a stencil master plate processing unit for perforating a stencil master plate according to a desired print pattern, a printing drum unit including a rotary cylindrical printing drum for wrapping a processed stencil master plate therearound and retaining it thereon, and rollers for supplying ink from its inner circumferential surface and through said processed stencil master plate; a press roller unit for pressing a sheet of printing paper against an outer circumferential surface of said printing drum with said processed stencil master plate interposed therebetween. In order to obtain a satisfactory printing result from the first copy even after the stencil duplicator has been kept unused for an extended period of time, the control unit of the stencil duplicator is provided with the mode of operating the duplicator by using a blank stencil master plate and pressing thereon against the printing drum with the press roller unit without supplying printing paper thereto so that the depletion of ink at the printing drum may be avoided. This special printing mode should be started every time a new printing operation is to be started after the duplicator has been kept unused for more than a certain prescribed time period.
REFERENCES:
patent: 4628813 (1986-12-01), Hasegawa et al.
Patent Abstract of Japan, M-916, Jan. 9, 1990, vol. 14, No. 6 (Appln. No. 63-72537).
Crowder Clifford D.
Riso Kagku Corporation
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