Sheet binding apparatus having needle detection means, and image

Details Sheet binding apparatus having needle detection means, and image Sheet binding apparatus having needle detection means, and image

1997-07-15

2000-05-16

Rada, Rinaldi I.

Elongated-member-driving apparatus

With control means responsive to sensed condition

227 5, 227 1, B27F 736, B27F 723

Patent

active

06062454&

ABSTRACT:
The present invention provides a sheet binding apparatus for effecting stapling operation by rotation of a motor including a current measuring device for measuring a current of the motor, a first timing output device for defining the timing of the stapling operation, a second timing output device for effecting the output at a different timing from an output timing of the first timing output device, a calculation device for measuring outputs of the current measuring device in response to signals from the first and second timing output devices to seek the difference between the measured values, a base current measuring device capable of setting a current value in advance on which the judgement of the presence/absence of a needle is based, and a discriminating device for comparing an output value from the calculation device with a set value of the base current value setting device to judge the presence/absence of the needle.

REFERENCES:
patent: 4703881 (1987-11-01), Riddell
patent: 4750661 (1988-06-01), Pane
patent: 5105225 (1992-04-01), Honjo et al.
patent: 5161724 (1992-11-01), Radtke et al.
patent: 5230457 (1993-07-01), Hiroi et al.

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