Helical nut-pinion-rack gear system

Details Helical nut-pinion-rack gear system Helical nut-pinion-rack gear system

1984-10-04

1986-04-08

Burr, Edgar S.

Printing

Selective or progressive

Rotary machines

74422, B41L 4746

Patent

active

045804931

ABSTRACT:
A drive system in which a rack having orthogonal teeth is driven off a helically threaded drive gear through a pinion. In order to compensate for the angle between the helical thread of the drive gear and the teeth of the driven rack, the drive gear and the rack engage the pinion at diametrically opposed positions and the axis of rotation of the pinion is skewed relative to the teeth of the rack by half the angle and the teeth themselves are also skewed relative to the axis of the pinion by half the angle. This has the effect that the teeth of the pinion are parallel at one side to the helical thread and are also parallel at the opposite side to the teeth of the rack. The drive system may be used in a postage meter for adjusting the print value wheels.

REFERENCES:
patent: 2510350 (1950-06-01), Rouan et al.
patent: 2831363 (1958-04-01), Lohr
patent: 4050374 (1977-09-01), Check, Jr.
patent: 4297919 (1981-11-01), Kuehnle

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