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Compensation of Margin Cursor Movement for Proportional Spacing

IP.com Disclosure Number: IPCOM000037106D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Bowden, JD Hays, DE Higdon, JM [+details]

Abstract

On a display for typewritten characters, there is conventionally a margin scale which is displayed on the screen and is used to indicate the position of the cursor for the generation of the next character to be typed. In non-proportional spacing typewriters, each character has exactly the same width. Thus, the number of characters per inch will be the same irrespective of the type of character; i.e. the number of characters per inch will be the same whether all I's or all W's or some combination thereof is typed. In this case, the movement of what is known as the margin cursor, which is a cursor indicating where along the margin scale typing has progressed, will be exactly synchronized with the location of the character to be printed.