B - Operations – Transporting – 41 – B
Patent
B - Operations, Transporting
41
B
95/16
B41B 21/20 (2006.01)
Patent
CA 1099973
ABSTRACT OF THE DISCLOSURE A phototypesetter is disclosed having a stepping motor which actuates an escapement carriage coupled to an elongated carriage driving member. A projection lens carriage and a collimating lens carriage are selectively electromagnet- ically coupled to the elongated driving member, thereby to pro- ject images of varying character sizes through a focusing lens coupled to the escapement carriage, which sequentially projects focused character images across a photosensitive film on a line by line bases. A track select mirror is also selectively elec- tromagnetically coupled to the elongated driving member for sel- ectively projecting one of a plurality of tracks bearing charac- ters of differing fonts carried by a rotatable font carrier element. A group of customized lens carriage positioning con- trol codes and customized sizing codes, unique for each photo- typesetter as a function of lens parameter variations, are stored within a size dictionary and a particular set, associated with the character size being typeset is read out of the dictionary and is employed to control the customized positioning of the lens carriages and image (film) positioning stepping motors. A novel technique is also disclosed whereby a customized group of the above-mentioned codes is rapidly and easily generated by an iterative image inspection process for each particular photo- typesetter during manufacture.
346967
Itek Corporation
Mcfadden Fincham
LandOfFree
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