B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
242/55, 156/32.1
B65H 23/16 (2006.01) B65B 13/18 (2006.01) B65B 13/22 (2006.01) B65H 16/04 (2006.01) B65H 23/06 (2006.01)
Patent
CA 1044680
Abstract of the Disclosure A strap dispenser for a strapping machine includes a dancer arm connected to a double acting pneumatic cylin- der assembly wherein the piston has a rod end and a larger area piston end. Air under the same pressure is applied to both ends before strap feeding begins an during the time that the strapping machine is reversed to withdraw strap from the machine. The resultant differential pressure re- tracts the dancer arm with the assistance of a relatively weak spring. During strap feeding both ends of the cylin- der are exhausted, the piston and exhausting through an adjustable throttle valve. This provides a passive resis- tance to advance of the dancer arm as the strap reel is be- ing accelerated during the strap feeding operation.
237972
Fmc Corporation
Na
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