Edge reading donor sensors for a thermal printer

Details Edge reading donor sensors for a thermal printer Edge reading donor sensors for a thermal printer

1992-08-12

1993-11-30

Fuller, Benjamin R.

Recorders

Thermal recording

400711, B41J 3522

Patent

active

052669670

ABSTRACT:
A thermal printer is provided with edge reading donor sensors that detect the presence of different color patches on the donor as the donor advances. The sensors detect the intrusion of a new color patch during the print cycle to stop the donor advance and properly position the donor relative to the receiver. The sensors are positioned alongside the thermal head and as near to the end of the print drum as possible. The sensors are thereby positioned as close to the heater line of the thermal head as possible preventing waste of donor.

REFERENCES:
patent: 4551729 (1985-11-01), Kubo et al.
patent: 4620199 (1986-10-01), Tatsumi et al.
patent: 4710781 (1987-12-01), Stephenson

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