Shredding machine

Details Shredding machine Shredding machine

1988-03-04

1989-04-04

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

With automatic control

241225, 241236, 271111, B02C 1822

Patent

active

048178772

ABSTRACT:
A shredding machine includes a pair of juxtaposed cutting rollers for shredding paper material, a movable paper feed tray for supporting the paper material to be shredded on it, a paper feed tray drive motor capable of moving the paper feed tray between lowered and elevated positions, a paper feed mechanism and a control circuit for controlling the shredding operation. The paper feed mechanism comprises paper feed rollers for feeding the paper material from the paper feed tray towards the cutting rollers, a paper feed roller drive motor for driving the paper feed rollers and an actuator for detecting the position of the uppermost paper of a stack of papers placed on the paper feed tray. The operation of the paper feed mechanism is interrupted in the case where the actuator is not activated by the stack of papers over a predetermined period of time. Abnormal conditions of the drive motors can be detected by the control circuit on the basis of an electric voltage being supplied to each motor.

REFERENCES:
patent: 4192467 (1980-03-01), Hatanaka
patent: 4444382 (1984-04-01), Ishikawa et al.
patent: 4466604 (1984-08-01), Kishimoto et al.

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