Printing – Selective or progressive – Bed and platen machines
Patent
1997-02-12
1998-10-13
Yan, Ren
Printing
Selective or progressive
Bed and platen machines
4001573, 400279, B41J 230
Patent
active
058196498
ABSTRACT:
A system for printing an image onto a target area of a moving substrate with an actuatable print head having an actuation delay time, the substrate movable at a variable speed to a print position relative to the print head. The system includes a trigger signal generator for generating a trigger signal when the target area of the substrate is a specified distance from the print position so selected that a time required to move the target area of the substrate the specified distance to the print position is not less than the actuation delay time of the print head. Encoder signals based on movement of the substrate decrement a reference count during a delay time to generate a delay count, wherein the delay time corresponds to the actuation delay time of the print head. The encoder signals decrement the delay count in response to the generation of a trigger signal, wherein a print signal is generated when the delay count is decremented to zero. The print head is actuated in response to the print signal to print the image accurately positioned onto the target area of the substrate. The system may be implemented with a digital computing device or discreet components.
REFERENCES:
patent: 4026401 (1977-05-01), Doane
patent: 4844635 (1989-07-01), Malkemes et al.
patent: 5191356 (1993-03-01), Shibamiya
patent: 5310272 (1994-05-01), Nishizawa
patent: 5312193 (1994-05-01), Kringe et al.
Blacker, Jr. Allen P.
Toktaeng Sampan
Townsend Lawrence B.
Illinois Tool Works Inc.
Kelley Steven S.
O'Brien John P.
Yan Ren
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