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Wire Printing Method

IP.com Disclosure Number: IPCOM000044150D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Pence, RE: AUTHOR

Abstract

Wire matrix printers are known which use a print head with two vertical columns of print wires. The first column is used for normal printing at high speed. The second column is used to produce higher quality output by printing dots between those of the normal configuration. This is accomplished in the vertical direction by the vertical offset of the wires in the second column, and in the horizontal direction by operating at half speed. It is often desirable to produce output, such as program listings or spread sheets, which do not require high quality print, at the highest possible speed. It follows that the first column of print wires is exposed to higher usage with consequent increased wear. This wear is distributed, increasing print head life, by using both columns of wires for normal printing on an alternating basis.

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Wire Printing Method

Wire matrix printers are known which use a print head with two vertical columns of print wires. The first column is used for normal printing at high speed. The second column is used to produce higher quality output by printing dots between those of the normal configuration. This is accomplished in the vertical direction by the vertical offset of the wires in the second column, and in the horizontal direction by operating at half speed. It is often desirable to produce output, such as program listings or spread sheets, which do not require high quality print, at the highest possible speed. It follows that the first column of print wires is exposed to higher usage with consequent increased wear. This wear is distributed, increasing print head life, by using both columns of wires for normal printing on an alternating basis. Due to the vertical nonalignment of the two columns of print wires, it follows that their respective normal print output will not share mutual registration. To avoid the obviousness of this lack of registration, usage is alternated on a page-by-page basis.

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