Image forming system

Details Image forming system Image forming system

1994-10-07

1995-11-14

Moses, R. L.

Photocopying

Contact printing

Light boxes

355209, G03G 2114

Patent

active

054671817

ABSTRACT:
An image forming system in which an image reading device, image forming device and duplex device are operated in a suitable combination to execute a page printer function, copier function and other particular functions based on respective applications. An application in charge of the page printer function sends a request for the duplex device to a system control layer, including a system controller, if the duplex unit is idle when the application has fully formatted image data to be output on both sides of a sheet in a bit map. When the right to use the duplex unit is granted to the application sent the request, the application sends a front print command to the system controller with the result that an image is formed on the front of a sheet by the image forming device. When the sheet carrying the image on one side thereof is fully received in the duplex device, the application sends a rear print command to the system controller. As soon as the sheet begins to be refed from the duplex device, the application releases the right to use the duplex device.

REFERENCES:
patent: 5241397 (1993-08-01), Yamada

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