Transport device for a print unit of printing machines

Details Transport device for a print unit of printing machines Transport device for a print unit of printing machines

1986-05-23

1988-01-12

Pearson, Charles A.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-feed mechanism

400328, B41J 2528

Patent

active

047187867

ABSTRACT:
The device comprises an electric motor whose rotor is capable of rotating selectively in either direction and a transmission unit which comprises a sleeve carrying a gear at an input end in mesh with a pinion on the motor shaft. At the output end of the sleeve a toothed pulley is engaged with a tensioned, toothed belt for moving the print unit back and forth. The sleeve is journalled on a shaft which can shift laterally at the input end and is urged by a spring and lever to shift in the sense forcing the gear into mesh with the pinion, thereby to minimize the radial clearance between the pinion and the gear.

REFERENCES:
patent: 4318625 (1982-03-01), Survant
patent: 4383778 (1983-05-01), Costa
patent: 4395151 (1983-07-01), Krenz
patent: 4507102 (1985-03-01), Geis et al.
General Service Manual-Olivetti ET 111.
Design of Machine Elements, 5th ed, Prentice-Hall, Englewood Cliffs, N.J., 1978, pp. 433-434, by Spotts.
Product Engineering, Oct. 26, 1959, pp. 71-75, "18 Ways to Control Backlash in Gearing", by Gutmann.

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