Optical sensing of wire matrix printers

Details Optical sensing of wire matrix printers Optical sensing of wire matrix printers

B - Operations, Transporting

41

J

101/96.04

B41J 5/32 (2006.01) B41J 7/96 (2006.01) B41J 29/393 (2006.01) G06K 5/02 (2006.01)

Patent

CA 1165172

OPTICAL SENSING OF WIRE MATRIX PRINTERS Abstract of the Disclosure An optical sensor is provided for each print wire of a print head and includes two glass fibers to carry light from a light-emitting diode to the surface of a record medium and to carry the reflected light to a photodiode. Each printed dot is detected and the sensor output is compared with a delayed or stored print signal which is applied to the drivers for the print wires.

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