Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1987-02-03
1988-09-06
Braun, Fred L.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
350350S, 355 3R, G01D 1514
Patent
active
047696591
ABSTRACT:
A printer for printing a desired print pattern on print regions of a paper having non-print regions including a light source, a control device including a plurality of optical switch elements having opposed electrodes with a ferroelectric liquid crystal material being interposed therebetween, and a photosensitive drum to which transmission light of the optical switch elements is radiated for enabling printing the pattern on the paper. The control device applies a positive or negative voltage between the opposed electrodes of each of the plurality of optical switch element selectively during a first period so as to control the quantity of transmission light between the opposed electrodes, and effects a short-circuit by simultaneously applying a substantially zero voltage between the opposed electrodes of all of the plurality of optical switch elements during a second period so as to reduce the quantity of non-uniform existence of ions in the ferroelectric light crystal material between the opposed electrodes. The second period is a period provided before and/or after the first period and the second period being shorter than the first period with the second period corresponding to at least one of the non-print regions at leading and trailing end portions of the paper among the non-print regions of the paper.
REFERENCES:
patent: 3961840 (1976-06-01), Morokawa et al.
patent: 4440473 (1984-04-01), Sekimoto
patent: 4508429 (1985-04-01), Nagae et al.
patent: 4548476 (1985-10-01), Kaneko
patent: 4589732 (1986-05-01), Shiraishi et al.
patent: 4591886 (1986-05-01), Umeda et al.
Hori Yasuro
Igawa Tatsuo
Ooishi Kazuya
Umeda Takao
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