Method and arrangement for monitoring bearings rolling along a guide rail, especially bearings of a tenter chain of a tentering machine
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United States of America Patent
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-
Aug 26, 2003
Grant Date -
Aug 1, 2002
app pub date -
Jan 23, 2002
filing date -
Jan 27, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus continuously monitor the functional condition of the successive bearings of the tenter clips or claws of a tenter chain as the bearings roll along a contact surface of the endless guide rail of a tentering machine. A sensing arrangement is integrated into the guide rail in the area of the contact surface thereof. The sensing arrangement senses a physical value indicative of the presence and condition of the respective bearing passing by the sensing arrangement. The sensing arrangement may include a pressurized air outlet and an adjacent pressure measuring channel connected to a pressure sensor to sense the back pressure created by a passing bearing. The sensing arrangement may alternatively include an electromagnetic eddy current sensor, or an optoelectronic light beam sensor.
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