Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain
Patent
1977-08-10
1978-12-12
Schacher, Richard A.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Pins on flexible belt or chain
B65H 1734
Patent
active
041292391
ABSTRACT:
In order to clamp a document metering tractor to a support shaft which together with a drive shaft provide a mounting for the tractor and without causing interference, such as binding, with the drive imparted by the drive shaft, a device is provided for clamping the tractor to the support shaft. This device consists of two parts one of which contains a split ring through which the support shaft extends and the other is a member for closing the ring and retaining it in closed condition. The split ring part may be a collet located internally of the tractor or a sleeve extending externally of the tractor and having the split ring as a portion thereof. In either case, a floating connection is provided between the split ring part and the tractor such as may be afforded by an enlarged opening in the tractor which contains the split ring part. The closing part is a member rotatable with respect to the split ring and may be provided by another ring having flats which engage the outer walls of the collet when relative rotation occurs. The rotatable part may be a screw which closes jaws extending from the split ring part which is disposed outside of the confines of the tractor. In either case the tractor may be movable axially of the drive and support shafts so as to locate the driving pins thereof with respect to the perforations in the document. When the proper alignment is obtained the clamp engages the tractor with the support shaft and locates it without giving rise to any torques or other forces which might otherwise interfere with the driving of the document.
REFERENCES:
patent: 3938721 (1976-02-01), Staneck
patent: 3941288 (1976-03-01), Wanat
Lukacher Martin
Precision Handling Devices Inc.
Schacher Richard A,.
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