B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/32
B65B 11/00 (2006.01) B65B 11/54 (2006.01) B65B 59/00 (2006.01)
Patent
CA 1232529
JAM DETECTION AND REMOVAL FOR WRAPPING MACHINE Abstract of the Disclosure In a stretch film wrapping machine wherein packages are elevated into a stretched sheet of film and underfolded, an improved control system monitors the operation of the wrapping machine to detect a jam condition and stop the machine for such jam conditions. A microprocessor monitors clock counts generated by the main drive shaft of the wrapping machine to detect a jam condition. Microprocessor operating cycles are counted between consecutive clock counts generated. If the drive shaft hesitates for a defined period of time, the counter overflows indicating a jam condition. The system also provides for operating the film wrapping machine in a reverse direction in discrete steps within a defined and limited range of the machine operating cycle to thereby facilitate removal of jams. To further facilitate jam removal, the rear film underfolder and package pusher are mounted to be moved away from the machine to thereby remove pressure from packages jammed beneath the rear underfolder.
424383
Gowling Lafleur Henderson Llp
Premark Feg L.l.c.
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