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High Speed Printing Using Multiple Data Buffers

IP.com Disclosure Number: IPCOM000061925D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Hajnos, D: AUTHOR

Abstract

Higher resolution printing now requiring four passes due to hammer repetition rate limitations can be printed in two passes by dividing the print data into two buffers that logically separate the data to match the hammer repetition rate capabilities.

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High Speed Printing Using Multiple Data Buffers

Higher resolution printing now requiring four passes due to hammer repetition rate limitations can be printed in two passes by dividing the print data into two buffers that logically separate the data to match the hammer repetition rate capabilities.

In dot band printers high density and high resolution horizontal printing is achieved by slowing down the dot band to accommodate the maximum hammer repetition rate. Alternatively, the data is printed in multiple passes, such as making four passes to print data on 180 pel centers at a 45 pel rate.

If the 180 pel center data includes a font which is restricted to every other dot, it therefore prints at 90 pel possible 180 pel. The data may then be printed in two passes without exceeding a maximum hammer repetition rate of 45 by logically separating the data into two print buffers from the original print buffer. The first buffer is loaded with the first dot to be printed and every other dot to be printed across the entire dot row. The second buffer is loaded with the second dot to be printed and every other dot across the entire dot row. Each buffer is therefore limited to the 45 pel rate.

Disclosed anonymously.

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