Browse Prior Art Database

Jump Ahead Page Scheduling

IP.com Disclosure Number: IPCOM000085925D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Findley, GI: AUTHOR [+2]

Abstract

A nonimpact printer is described in which forms data is recorded on an imaging member drum at a forms overlay station, and variable-print data is recorded on the imaging member at an imaging station.

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Jump Ahead Page Scheduling

A nonimpact printer is described in which forms data is recorded on an imaging member drum at a forms overlay station, and variable-print data is recorded on the imaging member at an imaging station.

A full page of print data is stored in a print buffer before printing of that page is initiated by the print control electronics. The buffered data is in a wait state for the n pages to be printed on the area of the imaging drum that is in transit between the forms overlay station and the imaging station.

Full throughput can be achieved only for those pages whose density does not exceed 1/n of the total buffer size. However, for those pages which do not require forms overlay, the printer control electronics schedules these pages at or near the imaging station.

By doing this, full throughput can be achieved with only two complete pages buffered, so full throughput is achieved when page density does not exceed half the total buffer size. Thus, it can be seen that a throughput improvement is achieved for systems in which n > or = 3.

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