Tractor drive for an office machine

Details Tractor drive for an office machine Tractor drive for an office machine

1989-10-11

1990-07-03

Levy, Stuart S.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

4006161, 4006162, B65H 2022

Patent

active

049384058

ABSTRACT:
A tractor drive for feeding continuous paper in an office machine has a drive shaft provided with an axially extending groove; a tractor housing; a drive wheel rotatably supported in the tractor housing; a transport member connected to the drive wheel to be driven thereby and arranged to project into marginal perforations of the paper for transmitting a feeding force thereto; a bearing sleeve affixed to the drive wheel and coaxially mounted on the drive shaft; a feather key carried by the bearing sleeve; and an actuating member operatively connected to the feather key. The actuating member has a clamping position in which it presses the feather key into a clamping contact with the bottom of the drive shaft groove, whereby the tractor (formed of the tractor housing, the drive wheel, the transport member and the bearing sleeve) is axially immobilized relative to the drive shaft. The actuating member has a releasing position in which it allows the feather key to be released from the groove bottom, whereby the tractor is axially shiftable on and relative to the drive shaft.

REFERENCES:
patent: 4199091 (1980-04-01), Hubbard
patent: 4735352 (1988-04-01), Ueno et al.
patent: 4780013 (1988-10-01), Sakai
patent: 4789088 (1988-12-01), Unuma et al.
patent: 4790467 (1988-12-01), Rex et al.
patent: 4819849 (1989-04-01), Seitz

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