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Browse Prior Art Database

Modified "Mixed Text" Function for an Electronic Typewriter

IP.com Disclosure Number: IPCOM000053136D
Original Publication Date: 1981-Sep-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 3 page(s) / 27K

Publishing Venue

IBM

Related People

Johnson, CF: AUTHOR [+2]

Abstract

With currently available bidirectional typewriters, the operator is required to estimate the space required for left-to-right text inserted in a normal right-to-left printed line, as illustrated at 10.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

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Modified "Mixed Text" Function for an Electronic Typewriter

With currently available bidirectional typewriters, the operator is required to estimate the space required for left-to-right text inserted in a normal right-to-left printed line, as illustrated at 10.

In an electronic typewriter which is bilingual and bidirectional, as for the Arabic and Hebrew languages, the languages are printed from right-to-left on the typing line, but left-to-right Latin text is sometimes keyboarded and printed on the same line. This is called "mixed text" in this article.

In order to insert the left-to-right text using presently available typewriters, the operator must space to the left an estimated distance corresponding to the Latin text to be printed, change the mode to left-to-right printing, keyboard the Latin text, change the mode to right-to-left printing, and then space left over the Latin text in order to resume keyboarding right-to-left. For standard spacing printers, the distance spaced can be accurately determined by counting characters. However, with a proportional spacing printer, the distance can only be approximated. Thus, crowded or widely spaced printing sometimes occurs.

The modified "mixed text" electronic function disclosed provides accurate formatting and also automatically positions the printer carrier at each step of the operation.

The function will be described in terms of operator actions, electronic logic operations, and printer actions. The assumption is made that the function is implemented on an electronic typewriter, such as the IBM Model 60, in which the keyboard inputs enter electronic logic and memory which, in turn, control the printer. Either microprocessor software or an electronic logic implementation of the function is possible. * The coded "X" could be any unused coded character.

The "mixed text" function operates correctly either in the left to right or right- to-left primary printing mode" The above description as...