Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1994-01-24
1995-04-11
Stodola, Daniel P.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 33, 226 45, B65H 2000
Patent
active
054050693
ABSTRACT:
A motion detection system detects both a soft, or near, jam and a complete, or hard, jam in movement of a paper web. A first sensor generates signals in response to the web driver, and a second sensor generates signals that are responsive to actual web movement. The signals from the second sensor are connected to a register to exhibit a signal state, and the signals from the first sensor are totalled in a counter between a cycle of changes in the state of the signal in the register. If there is a significant deviation in this total, an "error" signal is generated to advance a counter. If the number of "error"s are counted above a preset number, a shut down signal is generated.
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Duncan Robert R.
Felix Robert A.
Clarkson Douglas M.
Darling John P.
International Business Machines - Corporation
Stodola Daniel P.
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