Print wheels and methods of using same
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United States of America Patent
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May 9, 1995
Issued Date -
N/A
app pub date -
Aug 5, 1993
filing date -
Jun 17, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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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