Staggered gear for bi-directional operation

Details Staggered gear for bi-directional operation Staggered gear for bi-directional operation

1999-02-03

2000-08-01

Herrmann, Allan D.

Machine element or mechanism

Gearing

Rotary bodies

74 8918, 74 98, 74411, 192 4892, F16H 2912

Patent

active

060950072

ABSTRACT:
A gear drive system for a printer designed to print upon a continuous roll of paper and having a blade used to cut off printed portions of paper from the paper roll is implemented. The gear drive system consists of a drive shaft 330, a slip clutch 401, a clutch gear 116, a fixed gear 110, and a staggered gear 112 which controls the paper cutter blade 106. During printing, clutch 401 allows the drive shaft 330 shaft to slip relative to the clutch gear 116. When printing stops, clutch 401 locks clutch gear 116 which is engaged with the first portion of staggered gear 112 and causes staggered gear 112 to rotate until the second portion of staggered gear 112 engages the fixed gear 110. Staggered gear 112 is then driven by the fixed gear 110. A cutter blade is controlled by staggered gear 112, with the blade cutting off the paper as the fixed gear 110 is in reverse rotation. After the paper is cut, fixed gear 110 resumes its forward rotation, rotating staggered gear 112 and consequently, rotating cutter blade 106 away from the paper. After the blade has been rotated, staggered gear 110 continues to turn, until the fixed gear disengages with the second portion of the staggered gear. Full torque is applied to both cutting and opening rotations of the cutter blade.

REFERENCES:
patent: 1209837 (1916-12-01), Harris
patent: 1604563 (1926-10-01), Brown
patent: 4852707 (1989-08-01), Ito et al.
patent: 5307911 (1994-05-01), Robinson
patent: 5413426 (1995-05-01), Ijuin et al.
patent: 5482389 (1996-01-01), Bickoff et al.

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