Method and system for controlled inking of printer ribbons

Details Method and system for controlled inking of printer ribbons Method and system for controlled inking of printer ribbons

1996-12-16

1997-11-11

Yan, Ren

Typewriting machines

Including interposed inking device for record-medium

Renovation of used ribbon

400225, 400232, B41J 2712

Patent

active

056856539

ABSTRACT:
A method and apparatus for extending the useful life of a printing ribbon by controlling the ratio of ink used to ink applied to the ribbon, while maintaining visual clarity of printed characters. A counter accumulates the number of characters printed, and the print density, over a preset period of time. The number of characters printed is compared with predetermined triggering numbers of characters, and the print density is likewise compared with a predetermined triggering print density. As a result of this comparison, the speed of the printer ribbon is increased to allow an increase in the ratio of ink applied to ink used, when the number of characters and print density are high. Conversely, ribbon speed is decreased when the number of characters printed during the preset time period, and the print density, are low, to prevent overinking and fouling of printer hammers. This condition applies when the ribbon is relatively new.

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