Serial printer with hybrid print control of interlaced and minut

Details Serial printer with hybrid print control of interlaced and minut Serial printer with hybrid print control of interlaced and minut

1995-02-28

1997-11-11

Yockey, David

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 9, 347 16, B41J 215, B41J 2938

Patent

active

056869444

ABSTRACT:
In an ink jet printer, a print head includes (N+1) nozzles arrayed in the paper feed direction. The distance between the adjacent nozzles is K times as long as the dot line pitch P. N and K are each an integer larger than 2, and mutually prime. The quantity of ink droplet discharged from each nozzle is adjusted so as to form on a print paper, dots each having the diameter at least 1.4 times as long as the dot line pitch. An interlaced print as the combination of a print of paths made by the N successive upper nozzles of the print head and a paper feed of N print line pitches is used for the print on the most part of the print paper. A minute-feed print as the combination of a print of paths made by the N successive upper or lower nozzles of the print head and a paper feed of one print line pitch is used for the print on the upper and lower end areas of the print paper that reject a perfect print by the interlaced print. With the combination of the interlaced print and the minute-feed print, a perfect print is made on the entire surface of the print paper.

REFERENCES:
patent: 4198642 (1980-04-01), Gamblin
patent: 4401991 (1983-08-01), Martin
patent: 4631548 (1986-12-01), Milbrandt
patent: 4737041 (1988-04-01), Nakayama
patent: 4739415 (1988-04-01), Toyono et al.
patent: 4965593 (1990-10-01), Hickman
patent: 5070345 (1991-12-01), Lahut et al.
patent: 5079563 (1992-01-01), Starkweather et al.
patent: 5121142 (1992-06-01), Iwazawa et al.
patent: 5300950 (1994-04-01), Lopez et al.

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