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Browse Prior Art Database

Vertical Movement Between Existing Lines in an Electronic Typewriter Having a Memory

IP.com Disclosure Number: IPCOM000062375D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Cecil, RH: AUTHOR [+2]

Abstract

When a carrier of an electronic typewriter is positioned between existing lines of text, unnecessary use of text memory is avoided through not inserting any movements of the carrier into the memory unless a non-paper movement key is activated. To correct text on a previous line of a sheet of paper, it is usually necessary to perform both horizontal and vertical movements of the carrier to reach the location at which the correction is to be made. Since a vertical paper movement key moves the paper only one- half the distance that the paper is moved by a carrier return, the operator often has the carrier between existing lines on the paper; the movement of the paper is the vertical movement of the carrier relative to the paper since the carrier is stationary in the vertical direction.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 83% of the total text.

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Vertical Movement Between Existing Lines in an Electronic Typewriter Having a Memory

When a carrier of an electronic typewriter is positioned between existing lines of text, unnecessary use of text memory is avoided through not inserting any movements of the carrier into the memory unless a non-paper movement key is activated. To correct text on a previous line of a sheet of paper, it is usually necessary to perform both horizontal and vertical movements of the carrier to reach the location at which the correction is to be made. Since a vertical paper movement key moves the paper only one- half the distance that the paper is moved by a carrier return, the operator often has the carrier between existing lines on the paper; the movement of the paper is the vertical movement of the carrier relative to the paper since the carrier is stationary in the vertical direction. Normally, there is horizontal positioning of the carrier before the carrier is actually positioned on the line containing the error since the line having the error is above the carrier and can be seen more clearly. When the carrier is positioned between lines, a special algorithm is employed for handling both horizontal and vertical movements. The algorithm processes all the movements and tracks the position of the carrier relative to the paper but no data is inserted into memory unless a non-paper movement key, such as a character key, is activated. This enables the carrier to be viewed by the operat...