Job/page proofing for electronic printers.

摘要

An electronic printer has a scanner for scanning the document pages of a job and converting the document images scanned to pixels, and a printer for making prints of the documents from the pixels in accordance with job programming instructions, the scanner and printer operating asynchronously with respect to one another. Proofing of one or more pages of a job is effected by interrupting the job currently being scanned by the scanner to scan the proof job while continuing printing of other jobs in the print queue and, when the proof job is ready, interrupting the job being printed to print the proof job while resuming scanning of the interrupted job.