Photocopying – Projection printing and copying cameras – Detailed holder for original
Patent
1984-12-03
1986-04-01
Buczinski, S. C.
Photocopying
Projection printing and copying cameras
Detailed holder for original
355 76, 335205, 335207, G03B 2762, H01H 900
Patent
active
H00000434
ABSTRACT:
In a copier with a copying platen, and platen cover unit pivotal thereover, which may comprise a document feeder, the platen cover unit having connecting pivotal lifting means, and a magnetic latch for magnetically latching the platen cover unit in a closed position closely overlying the copier platen with a magnetic flux field between the platen cover unit and the copier generated by at least one magnet on one completing a magnetic circuit through at least one magnetic flux conductive member on the other when the magnetic latch is closed, the magnetic latching of the platen cover unit in the closed position providing for document retention and illumination thereunder and magnetic resistance to opening of the platen cover unit by the lifting means, and with a switch for indicating closure of the platen cover unit, the improvement wherein the switch comprises a magnetic switch magnetically coupled to the magnetic latch, the magnetic switch being magnetically actuated in response to the change in magnetic flux field of the magnetic latch corresponding to the completion of the magnetic circuit through the magnetic flux conductive member, the magnetic switch providing a control signal to the copier in direct response to, and indicative of, the completed, positive, magnetic latching of the platen cover unit in the closed position.
REFERENCES:
patent: 3155792 (1964-11-01), Werts
patent: 3418610 (1968-12-01), Hammond
patent: 3512885 (1970-05-01), Osborne et al.
patent: 3533029 (1970-10-01), Steinbach et al.
patent: 3796850 (1974-03-01), Moreland, II et al.
patent: 3888582 (1975-06-01), Griswold
patent: 4186362 (1980-01-01), Kondo et al.
patent: 4190359 (1980-02-01), Murayama et al.
Xerox Disclosure Journal, "Latch for Document Handler" by Paul V. Sadwick, vol. 8, No. 3, May/Jun. 1983, pp. 271-272.
Buczinski S. C.
Wallace Linda J.
Xerox Corporation
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