Mechanism for supporting an original document cover lid of an el

Details Mechanism for supporting an original document cover lid of an el Mechanism for supporting an original document cover lid of an el

1980-07-23

1982-11-02

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Detailed holder for original

355 3R, G03B 2762

Patent

active

043571018

ABSTRACT:
A mechanism for supporting a cover lid, particularly an original document cover lid of an electrostatic copying apparatus, includes a generally U-shaped support member for supporting the cover lid. A pair of arms of the support member are fixed to a pair of hinge members which are mounted on the machine frame for rotation about an axis. Support pieces are fixed to the hinge members for rotation therewith about the axis. First springs are connected to the support pieces for urging the hinge members, the support member and the cover lid to rotate about the axis in a first direction toward an open position of the cover lid. A revolving plate is pivotally mounted on the machine frame, and a support bar is fixed to one of the hinge members and extends into an elongated opening of the revolving plate, such that rotation of the hinge members around the axis causes the support bar to pivot the revolving plate between first and second positions. An oscillating lever mounted on the machine frame has a projection fitting into the notch when the revolving plate is in the first position and the cover lid is in the open position, such that the projection maintains the cover lid in the open position. A second spring biases the projection against an arc-shaped surface of the revolving plate when the cover lid is moved from the open position toward a closed position thereof.

REFERENCES:
patent: 2545964 (1951-03-01), Maxwell
patent: 3615134 (1971-10-01), Newcomb
patent: 4040615 (1977-08-01), Kurosaki
patent: 4124296 (1978-11-01), Kishi et al.
patent: 4135805 (1979-01-01), Taylor et al.
patent: 4171906 (1979-10-01), Yoshida et al.
patent: 4172660 (1979-10-01), Yanofsky et al.
patent: 4190359 (1980-02-01), Murayama et al.
Xerox Disclosure Journal, "Torsion Spring Counterbalance Mechanism," Ritter, p. 71, vol. 3, No. 1, Jan./Feb.'78.

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