Print wheels and methods of using same

Details Print wheels and methods of using same Print wheels and methods of using same

1993-08-05

1995-05-09

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

400174, 101 9319, B41J 122

Patent

active

054134226

ABSTRACT:
In a print wheel encoding scheme, signs such as reflector strips are arranged on an encoder ring along the print wheel petals. One strip is provided at each petal. The strips are grouped into groups of three or more petals. Each group starts with a reflective strip and terminates with a non-reflective strip, or vice versa. The strips are read by a single optical sensor to provide a reliable mechanism for reading the print wheel I.D., homing the print wheel and detecting print wheel error conditions such as jams or mispositioning.

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