Browse Prior Art Database

Variable Ribbon Incrementation

IP.com Disclosure Number: IPCOM000053317D
Original Publication Date: 1980-Jan-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Ko, EY Evans, CW Hsieh, DM Penrod, JC [+details]

Abstract

In the printer field the traditional fabric-base or carbon-film ribbons have been replaced to some extent with a ribbon which is a cast matrix plastic material, such as nylon, containing a liquid ink. White such ribbon structures produce high quality printing at low cost, they are quite fragile. Conventionally, they are single-pass ribbons. The ribbon is incremented a small amount after each character strike. A problem has been recognized when such a ribbon structure is used for repetitive characters. Because such repetitive characters tend to strike regions which lie very close to each other even with the small step increment, repetitive characters tend to produce fading in the printed copy and, consequently, a reduction in quality.