Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1980-11-10
1982-06-22
Eickholt, E. H.
Typewriting machines
Typing by other than type-face or type-die
Thermal
219216, 346 76PH, 358 78, B41J 302
Patent
active
043359680
ABSTRACT:
A reading head scans a document to be reproduced line by line and delivers an analog signal the amplitude variations of which represent the variations in tint on the document. An analog-digital converter preceded by a sampler for sampling the analog signal delivers, in respect of each line scanned, n digital samples (where n is a positive integer) corresponding to the tints to be reproduced on a line of a sheet of thermosensitive paper. For each line to be reproduced, a set of storage shift registers generates n control signals which are functions of the digital values of the n samples associated to the tints to be reproduced. These signals control power supply means for feeding n resistors on a thermal printing head.
REFERENCES:
patent: 3604846 (1971-09-01), Behane et al.
patent: 3964388 (1976-06-01), Maxwell
patent: 3975707 (1976-08-01), Ito et al.
patent: 4020465 (1977-04-01), Cochran et al.
patent: 4039065 (1977-08-01), Seki et al.
patent: 4113391 (1978-09-01), Minowa
patent: 4141018 (1979-02-01), Mizuguchi et al.
patent: 4205395 (1980-05-01), Shortridge
patent: 4216481 (1980-08-01), Hakoyama
patent: 4224869 (1980-09-01), Moriw
patent: 4262188 (1981-04-01), Beach
"Thomson-CSF"
Eickholt E. H.
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