Printing apparatus

Details Printing apparatus Printing apparatus

1988-07-18

1990-08-07

Eickholt, Eugene H.

Typewriting machines

Including plural, independently supported key-boards,...

101 9311, B41J 354

Patent

active

049462970

ABSTRACT:
A printing apparatus suitable for printing on a print mediumn of a large size which is reduced in overall size and facilitates adjustment of printing timings of line printing heads therein. The printing apparatus comprises a plurality of line printing heads of the type wherein printing elements are disposed on a line along an end edge thereof. The line printing heads are disposed in a pair of rows spaced in the feeding direction of a print medium in a housing such that the printing elements along the end edges thereof are disposed in an alternate relationship in a pair of rows perpendicular to the feeding direction of a print medium and each located nearest to the other row of the printing elements. A pair of parallel rotatable platen means are disposed for cooperation with the pair of rows of printing elements on the line printing heads and include a plurality of platen rollers disposed in an opposing relationship to the line printing heads and a plurality of fixed dummy platens disposed in an alternate relationship with the platen rollers.

REFERENCES:
patent: 2723741 (1955-11-01), Carlson
patent: 3878008 (1975-02-01), Drumbaugh
patent: 4632585 (1986-12-01), Oyamatsu
patent: 4660052 (1987-04-01), Kaiya et al.
patent: 4692041 (1987-09-01), Dyma et al.
patent: 4776711 (1988-10-01), Harada
patent: 4818126 (1989-04-01), Brooks et al.
U.S. Appln. Ser. No. 121,683 filed 11/17/87.
Centronics Technical Manual, Apr. 1984-Model 351 Printer.

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