Printing device capable of low-density printing and high-density

Details Printing device capable of low-density printing and high-density Printing device capable of low-density printing and high-density

1989-05-31

1990-07-17

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400121, 101 9305, B41J 312

Patent

active

049417614

ABSTRACT:
A printing device including a printing head having a plurality of printing elements arranged in first and second rows and in a staggered manner; first printing control means for allocating print data to some of the printing elements in the first row spaced at regular intervals, in each of the intervals one or more of the printing elements being located, and for allocating the print data also to some of the printing elements in the second row spaced at regular intervals, in each of the intervals one or more of the printing elements being located, wherein any one of the printing elements allocated in the second row is located at a position intermediate of the adjacent ones of the printing elements allocated in the first row, whereby low-density printing is effected by the printing elements allocated by the first printing control means; second printing control means for allocating the print data to all of the printing elements in the first and second rows, whereby high-density printing is effected by the printing elements allocated by the second printing control means; and selecting means for selecting either of the first printing control means or the second printing control means.

REFERENCES:
patent: 4010835 (1977-03-01), Marton
patent: 4159882 (1979-07-01), Sanders, Jr. et al.
patent: 4273040 (1981-06-01), Sebrosky
patent: 4279521 (1981-07-01), Kightlinger
patent: 4408907 (1983-10-01), Bernardis

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