B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
342/12
B21D 28/00 (2006.01) B21D 43/02 (2006.01) G01B 7/28 (2006.01)
Patent
CA 1308461
ABSTRACT A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in prox- imity to the sensing device, the sensing device provides a voltage signal to a controller. The voltage signal is proportional to the amount of, or mass of, metallic material in each frame or stamping and the distance between the frame or stamping and the sensing device. The controller generates an individual waveform from the voltage signal for each frame passed in proximity to the sensing device. Each individual waveform is a function of the position of the movable portion of the stamping device for one cycle. As the plurality of individual frames are passed in proximity to the sensing device, a plurality of individual waveforms are generated within the controller. The waveforms are compared within the controller to detect a deviation between waveforms. A deviation between waveforms indicates a sheet strip material misfeed condition within the stamping device. If a sheet strip material misfeed condition is detected, the controller provides a signal to the stamping device to initiate stoppage of the stamping device. If desired, the plurality of indiv- idual waveforms may also be compared within the controller to detect a deviation in the configuration of the frames or stampings produced by the stamping device from a desired frame or stamping configuration.
574339
Baldwin William
Malloy Joseph P.
Baldwin William
Macrae & Co.
Malloy Joseph P.
Oberg Industries Inc.
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