Operation control device for copying apparatus
AssigneeMinolta Camera Kabushiki Kaisha
InventorYoshihisa Kawai
Life of this patent
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Abstract
An electrophotographic copier having selectable magnification of the document image includes controls for preventing initiation of a copy production cycle during an operation changing optical elements from an existing magnification to a desired other magnification, and conversely for preventing initiation of a magnification change operation during a copy production cycle.
Claims10
An operation control device for use in a reproducing apparatus having a reproduction-projection mechanism together with drive means therefor, said mechanism being operable to form an image of a document, and including projectionmagnification changing means operable to vary the size of the image to be formed by the reproduction-projection mechanism, wherein the improvement comprises:
- means for producing a first signal in response to completion of a projection-magnification changing operation,
- a first circuit for actuating the drive means, said first circuit being closed in response to a signal from the signalproducing means,
- a second signal-producing means indicating completion of an operation of the mechanism,
- a second circuit for actuating the projection-magnification changing means, said second circuit being closed in response to completion of an operation by the reproduction-projection mechanism, and
- a manual control and memory means associated with said first circuit, said memory means being settable to a discrete state indicative of an operation of the manual control and said changing means being actuated in response jointly to the discrete state of the memory means and the signal from said second signal-producing means,
In an electrophotographic reporduction apparatus having a reproducing cycle together with mechanism operable to change the magnification of the image to be formed in a reproducing cycle, the improvement comprising
- drive means for the magnification-changing mechanism,
- first signal-producing means responsive to completion of the operation of the mechanism,
- second signal-producing means responsive to completion of the reproducing cycle,
- a first conditionally-enabled control operable to activate said drive means,
- a second conditionally-enabled manual control for initiating a reproducing cycle,
- first means enabling said second manual control in response to a signal from said first signal-producing means, and
- second means enabling said first manual control in response to a signal from said second signal-producing means,
- whereby mutually exclusive operation of said magnification changing means and said reproduction mechanism is provided.
Dependencies are inferred from the claim text.