Apparatus and method for donor sensing at the print line in a th

Details Apparatus and method for donor sensing at the print line in a th Apparatus and method for donor sensing at the print line in a th

1992-02-21

1993-03-23

Fuller, Benjamin R.

Recorders

Thermal recording

B41J 2325

Patent

active

051968622

ABSTRACT:
A thermal printer contains a thermal print head with a bead line, a print drum with surface openings, and a two-part sensor assembly with a first member mounted on the thermal print head adjacent the bead line and a second member mounted in one of the surface openings. The first and second members of the sensor assembly are alignable to communicate with one another to detect the presence of the dye donor web. Because the sensors are mounted on the print drum and mounted on or embedded in the print head at the bead line, the dye donor web is detected at the print line.

REFERENCES:
patent: Re33260 (1990-07-01), Stephenson
patent: 4688050 (1987-08-01), Tsao
patent: 4710781 (1987-12-01), Stephenson

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