G - Physics – 03 – B
Patent
G - Physics
03
B
95/25, 101/41
G03B 23/00 (2006.01)
Patent
CA 1119458
ABSTRACT A photoprinting apparatus includes a housing having a control panel for operation of the printer and a safe-light window through which a photo-sensitive strip of material within the housing can be observed during the orienting, exposing and developing of the image. A reading font is disposed at the front of the housing and an imaging font corresponding in information and symbol location to the reading font is placed upon a table capable of rectangular coordinate movement within the housing. An arm secured at one end to the font table overlies a detent plate having accurately spaced recesses therein. Each recess corresponds to the center of a symbol on the imaging font and the reading font. A pointer on the arm which extends over the reading font enables the operator to move the table to bring the imaging font in position to project a symbol upon a photosensitive sheet located within the housing. An optical system within the housing is provided with a first safelight illumination source for projecting an image of the selected symbol upon the photo-sensitive sheet for spacing and aligning pur- poses. A second light source exposes the image upon the sheet after electro- optical means have automatically corrected any baseline errors. The font table and optical system can be shifted within the housing along spaced rods to change the magnification or point size of the symbols on the font. Precise symbol size can be achieved by light sensors within the housing. The quality of the developed images is maintained by solenoid actuated chemical dispensers which add fresh chemicals to the surface of the photo-sensitive sheet after each exposure. Each symbol on the imaging font is provided with a base line reference bar which is projected with the image upon the photo- sensitive sheet. The baseline reference bar is sensed before each exposure and the vertical position of the imaging font adjusted to its desired precise location before each exposure. The photo-sensitive sheet is carried in the form of an elongated strip within a cassette in the housing from which it is fed into the exposing area in the housing.
347114
Eccles Brian J.
Maizner Neil L.
Minard Hubert C.
Otsuki Juko S.
Slater Edward L.
Smart & Biggar
Visual Graphics Corporation
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