Synchronously transferring image data to a printer

Details Synchronously transferring image data to a printer Synchronously transferring image data to a printer

1991-04-24

1992-11-10

Evans, Arthur G.

395164, G06K 1500

Patent

active

051631237

ABSTRACT:
In an image forming apparatus for receiving image data sent from an external apparatus and forming an image of dot image data on a printing paper, there is provided a bit map memory for storing dot image data of one page and a buffer memory for storing dot image data of a predetermined amount. In the image forming apparatus, dot image data are read out from the bit map memory in a unit of one scan line and are written in the buffer memory, and dot image data are read out from the buffer memory and are outputted to a printer engine. A start signal for representing start of forming dot images is generated every one scan line and is outputted to the printer engine, and the writing timing of the writing operation is controlled in response to the start signal.

REFERENCES:
patent: 4742485 (1988-05-01), Morrell
patent: 4847787 (1989-07-01), Nishiyama et al.
patent: 4864414 (1989-09-01), Nishiyama et al.
patent: 4901249 (1990-02-01), Shiota

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