High precision dye donor web positioning in a thermal color prin

Details High precision dye donor web positioning in a thermal color prin High precision dye donor web positioning in a thermal color prin

1994-05-18

1996-08-27

Wiecking, David A.

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400234, B41J 3316

Patent

active

055494005

ABSTRACT:
A thermal printer includes a web transport for positioning a dye donor web along a path; a sensor along the path and spaced from the print line for detecting the arrival of a leading edge of a dye frame, and a control for the web transport. The control is adapted to reposition the dye donor web along the path so that the leading edge of the dye frame is in substantial alignment with the print line before printing the dye frame begins. The web transport moves the dye donor web in both forward and reverse directions past the print line, and the sensor detects the leading edge of a frame while the donor web moves in a forward direction. The control stops the web and reverses it to thereby rewind the dye donor web until the edge of the dye frame is in substantial alignment with the print line. The control adjusts the amount of repositioning of the dye donor web that is effected as a function of the detected leading edge's location along dye donor web.

REFERENCES:
patent: 4620199 (1986-10-01), Tatsumi et al.
patent: 4710781 (1987-12-01), Stephenson
patent: 4739341 (1988-04-01), Matsuno et al.
patent: 4893951 (1990-01-01), Iwatani et al.
patent: 5137378 (1992-08-01), Satoh
patent: 5196862 (1993-03-01), Fisher, Sr.
patent: 5266967 (1993-11-01), Maslanka et al.

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