Typewriting machines – Including control of format by programmed-control-system
Patent
1998-10-06
2000-02-08
Yan, Ren
Typewriting machines
Including control of format by programmed-control-system
400 74, 101181, 101248, B41J 346
Patent
active
060221542
ABSTRACT:
A method for detecting image position errors, includes forming a first pattern with a symbol embedded therein and a second pattern which, when superpositioned on the first pattern, exposes the symbol if the misalignment between the first and second patterns exceeds a position error tolerance. The symbol is perceivable with the unaided eye even if the misalignment is imperceivable to the unaided eye.
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Agfa Corporation
Nolan, Jr. Charles H.
Stadnicki Alfred A.
Yan Ren
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