B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 11/00 (2006.01) B65B 11/02 (2006.01)
Patent
CA 2359720
In a stretch film wrapping system for wrapping stretch film around a load disposed at a wrapping station, a single motor drive system is provided for controlling both the rotation of a rotational or orbiting boom member with respect to a static boom member and for controlling the ele- vation of a stretch film roll carriage assembly movably mounted upon a wrapping mast fixedly connected to the rota- tional or orbiting boom member. A cable drum assembly is mounted upon a driven shaft operatively connected to the drive motor and is normally biased by a spring mechanism to a first position at which the cable drum assembly is fixed upon the static boom member such that when the rotational boom member is rotated, a cable, connecting the stretch film roll carriage assembly to the cable drum assembly, is wound upon the cable drum assembly elevating the stretch film roll carriage assembly. A first solenoid mechanism biases the cable drum assembly to a second position at which the cable drum assembly is fixed upon the rotational boom member such that the stretch film roll carriage assembly is maintained at a predetermined elevational level whereby stretch film is wrapped around a load in a reinforcing mode. A second solen- oid mechanism biases the cable drum assembly to a third po- sition at which the cable drum assembly can freely rotate upon the driven shaft such that the stretch film roll car- riage assembly is moved to its lowermost position in prepa- ration for a new wrapping operation cycle.
Finlayson & Singlehurst
Illinois Tool Works Inc.
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