Printing apparatus having stain preventing means

Details Printing apparatus having stain preventing means Printing apparatus having stain preventing means

1982-05-26

1984-08-07

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101110, 101416R, B41J 912

Patent

active

044636725

ABSTRACT:
The apparatus of the present invention is provided with a stain preventing element provided between a print drum and a hammer and adapted to shield alternate digits to be printed, said stain preventing element being shiftable in the transverse or advancing direction of print sheet. Said hammer is an intermediate hammer which is set to a predetermined initial position from an unsteady position upon the turning on of the power supply, and simultaneously necessary preparations such as paper feeding and ink application onto the print drum prior to the printing are performed. Also there is provided a stain preventing mechanism for multi-color printing, and the above-mentioned stain preventing member is provided with a means for preventing ink diffusion. Also the paper feed plunger etc. is structured similar to the said hammer thereby rendering the entire apparatus smaller and more compact.

REFERENCES:
patent: Re28796 (1973-05-01), Shimodaira et al.
patent: 1025137 (1912-05-01), Hessan
patent: 3332343 (1967-07-01), Sims
patent: 3677452 (1970-07-01), Wallace
patent: 3734012 (1973-05-01), Haggins
patent: 3750794 (1973-08-01), Griggs
patent: 3797387 (1975-03-01), Decker et al.
patent: 3805696 (1975-04-01), Tsuji
patent: 3994219 (1976-11-01), Yasuda et al.
patent: 4054089 (1977-10-01), Okabe
patent: 4070963 (1978-01-01), Weaver
patent: 4110050 (1978-08-01), Wood et al.
patent: 4240345 (1980-12-01), Kyoguko
patent: 4250807 (1981-02-01), Kordo et al.

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