Browse Prior Art Database

Dot Leadering

IP.com Disclosure Number: IPCOM000093589D
Original Publication Date: 1967-Nov-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Terry, DW: AUTHOR

Abstract

Leadering is the separation of text in a line by moving a predetermined part of it to even with the left margin of the output display and moving another predetermined part of it to even with the right margin of the output display. This format is common in directories, such as telephone books and the reference index of books. The separating portion is made up of special characters, such as dots.

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Dot Leadering

Leadering is the separation of text in a line by moving a predetermined part of it to even with the left margin of the output display and moving another predetermined part of it to even with the right margin of the output display. This format is common in directories, such as telephone books and the reference index of books. The separating portion is made up of special characters, such as dots.

The apparatus for accomplishing dot leadering comprises a tape reader as an input device, a programmed data processor, and an output printer. In leadering, the separating portion is indicated on the input tape by a special code physically located between the two text portions. When the dots are not to be aligned, the total length of the input line of text is subtracted from the predetermined length of the output line automatically after receipt of a carrier return code.

A code, representative of the difference from this subtraction, is used directly to generate the leader spacing. The text of the line prior to the separation point defined by the position of the special code in the data is transferred to a magnetic core output register memory, where it automatically is subsequently read to control driving of the output printer. The leader spacing is then transferred to the output register in the form of codes and so used, and then the codes representing the rest of the line of text are so transferred and used.

In generating the codes representative of actual spacing from the difference found as described above, the difference is decremented by the space value of a leader group. A leader group is a unit made up of a predetermined space code followed by a dot code. This leader group can have a value of nine space units and the subtraction continues until the difference is reduced to eleven or some smaller value. With each such decrement, an individual code representative of a leader group is transferred to the output register. When the difference is less than twelve...