Tractor with locking action

Details Tractor with locking action Tractor with locking action

1987-12-22

1989-04-11

Stodola, Daniel P.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

G03B 122

Patent

active

048198498

ABSTRACT:
A sheet feed tractor of the type used in printers for automatically advancing paper and the like has a recess in one surface of the chassis about the passage for the support shaft and axially extending, resiliently deflectable fingers in the recess and through which the support shaft will pass. The fingers are disposed in substantially alignment with the drive belt and are deflected inwardly by a rotatable clamping member disposed thereabout to effect clamping action on the support shaft substantially in alignment with the drive belt. This orientation of the clamping action precludes inadvertent movement of the tractor on the support shaft during clamping of the tractor thereon and also eliminates undesirable torque on the tractor when the tractor is operating by essentially eliminating any moment arm between the clamped area and the center line of the drive belt.

REFERENCES:
patent: 4129239 (1978-12-01), Hubbard
patent: 4130230 (1978-12-01), Seitz
patent: 4194660 (1980-03-01), Seitz
patent: 4199091 (1980-04-01), Hubbard
patent: 4315585 (1982-02-01), Seitz
patent: 4469262 (1984-09-01), Seitz
patent: 4469263 (1984-09-01), Seitz
patent: 4566618 (1986-01-01), Seitz et al.
patent: 4569468 (1986-02-01), Neer

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