Paper movement monitor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Jun 30, 1988
filing date -
Jun 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A monitor (18,26,28) monitors movement of paper (12) through a printer (16). The paper movement sensors (18,26) comprise one central wheel (70) or a pair of spaced edge wheels (158) each operating an individual photo-optic wheel (164,76). By counting pulses from the photo-optic wheels (76,164) monitor logic (28) determines conditions of jam, over-feeding and skew within the printer (16) both on an instantaneous and on a short term cumulative basis. The system self-calibrates through an initializing routine and later, continuously during operation. Paper movement sensors (18,26) are provided in dust-protected housings which can be chained together to provide monitoring facilities at many points.
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Family
International Classification(s)
Cited Art Landscape
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