Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1994-02-28
1996-05-14
Footland, Lenard A.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226181, 254215, D06C 1500
Patent
active
055160220
ABSTRACT:
A novel method and apparatus for a two speed strap take up usable in a strapping machine. The two speed strap take up apparatus generally comprises a high speed roller assembly driven by a high speed drive shaft, a low speed roller assembly driven by a low speed drive shaft, a shaft rotation reduction assembly interconnecting the high speed drive shaft and the low speed drive shaft, and a roller clutch assembly interconnecting the shaft rotation reduction assembly and the low speed drive shaft. An input clutch assembly may interconnect the high speed drive shaft and an input drive means. In operation, a strap is disposed between and frictionally engaged by a high speed roller of the high speed roller assembly and a low speed roller of the low speed roller assembly. The low speed roller is then driven in rotation by the high speed roller. When a first tension is applied to the strap, the high speed roller slips relative to the high speed drive shaft until the roller clutch interconnecting the shaft rotation reduction assembly to the low speed drive shaft engages and rotates the low speed drive shaft at a reduced rotation rate relative to the rotation rate of the high speed drive shaft. The strap is now driven by both rollers at the reduced rotation rate as the high speed roller slips relative to the high speed drive shaft. When a second tension, greater than the first tension, is applied to the strap, the low speed roller slips relative to the low speed drive shaft at which time the strapping machine may perform additional functions on the strap.
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Footland Lenard A.
Illinois Tool Works Inc.
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