1977-04-29
1979-02-27
Adams, Russell E.
354 13, 354 18, 354 19, 354292, B41B 1900, B41B 2300
Patent
active
041416325
ABSTRACT:
A photocomposing machine includes a fiche-like type font having positive and negative character fields, an optical system having a variable magnification and automatic focus compensation for imaging characters on a film strip, and means for conveniently and rapidly selecting individual characters of the positive field of the type font and moving them into alignment with an index light, which simultaneously positions the corresponding negative character in the optical path. A font carrying frame is mounted for simultaneous and direct X and Y movement with respect to the optical path for rapid selection of characters. The object portion of the optical components including the font, and the lens assembly are movable with respect to each other and with respect to the image plane to vary magnification. An automatic focusing cam maintains the focus of the image for all magnifications. The exposure lamp is used in a full power mode for exposure, and in a reduced power mode as the safe light, and means are provided for automatically adjusting the exposure time and the safe light intensity in accordance with different magnifications.
REFERENCES:
patent: 1237239 (1917-08-01), Bunnell
patent: 2160750 (1939-05-01), Meyer
patent: 2537069 (1951-01-01), Lohr
patent: 3139791 (1964-07-01), Bailey et al.
patent: 3308732 (1967-03-01), Raalt et al.
patent: 3371577 (1968-03-01), Yatera
patent: 3445162 (1969-05-01), Klatt
patent: 3592114 (1971-07-01), Minett
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