Printer having a reversible motor and separate transmissions sys

Details Printer having a reversible motor and separate transmissions sys Printer having a reversible motor and separate transmissions sys

1990-01-23

1990-10-30

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355211, C03G 1500

Patent

active

049672398

ABSTRACT:
An electrostatic printer includes a photoconductive drum (2), a developer (5) for forming a toner image on a surface of the drum (2), a pickup roller (11) for removing a medium (10) in a cut sheet form from a hopper (8), a registration roller (12) for introducing the cut sheets (10) removed by the pickup roller (11) into a printing zone, a fuser (14) for fixing the toner image on the cut sheets (10), and an eject roller (16) for discharging the medium (10) from the printing zone. A single motor (19) is selectively rotatable in the normal direction and the reverse direction according to commands output by a control unit (300) is provided for driving the aforesaid rotating elements (2, 5, 11, 12, 14, 16). A torque derived from the motor being transmitted, on one hand, to the pickup roller (11) through a first transmission system (100) incorporating a one-way clutch (20a) which transmits only one directional rotation of the motor, and on the other hand, to the rotating elements (12, 14, 16) other than pickup roller (11) through a second transmission system (200) incorporating another one-way clutch (20b) which transmits only the opposite directional rotation of the motor (19).

REFERENCES:
patent: 4652161 (1987-03-01), Crean et al.
patent: 4727387 (1988-02-01), Israely
patent: 4754293 (1988-06-01), Aizawa et al.
patent: 4769669 (1988-09-01), Watanabe
patent: 4789259 (1988-12-01), Katayanagi
patent: 4806968 (1989-02-01), Watanabe et al.

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