Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1990-08-13
1992-07-21
Wiecking, David A.
Typewriting machines
Typing by other than type-face or type-die
Thermal
358298, 346 76PH, B41J 2365
Patent
active
051317672
ABSTRACT:
A halftone printing system comprising reference level generation means for generating a reference gradiation level, decision means for comparing a gradation level input signal with the output signal from the reference level generation means and deciding if the gradation level input signal is greater than or equal to the reference gradation level output signal, count means for counting the number of output dots from the decision means and deliverying heat accumulation information on heat accumulated in a thermal head, and a pulse generator which generates pulses, corresponding to the gradation level input signal in accordance with the heat accumulation information from the count means.
The halftone printing system further comprises white line detection means for detecting a white line included in the input signals, white line count means for counting the number of continuous white lines in correspondence with the detected results of the white line detection means, and white line decision means for applying a predetermined signal to heat accumulation index-count means, depending upon the count value of the white line count means.
REFERENCES:
patent: 4536774 (1985-08-01), Inui
patent: 4553173 (1985-11-01), Kawamura
patent: 4574293 (1986-03-01), Inui
patent: 4638332 (1987-01-01), Sakura
patent: 4639741 (1987-01-01), Inoue
patent: 4663734 (1987-05-01), Berry
patent: 4667250 (1987-05-01), Murai
patent: 4704618 (1987-11-01), Gotoh
patent: 4723132 (1988-02-01), Matsuo
patent: 4736253 (1988-04-01), Shida
patent: 4774528 (1988-09-01), Kato
patent: 4777536 (1988-10-01), Kato
patent: 4806949 (1989-02-01), Onuma
patent: 4819008 (1989-04-01), Nagato
Hatabe Etsuo
Ohnishi Masaru
Yamada Keiki
Kelley Steven S.
Mitsubishi Denki & Kabushiki Kaisha
Wiecking David A.
LandOfFree
Halftone printing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Halftone printing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halftone printing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-839727