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Universal Print Font

IP.com Disclosure Number: IPCOM000052485D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Raesz, R: AUTHOR [+2]

Abstract

There is described a font for use in an ink jet printer, or the like, which reduces from three to one the number of fonts required to support 10 and 12 pitches and proportional spacing. Printing of received data regardless whether it is 10 or 12 pitch or proportionally spaced may be supported. The font is implemented by using a placing algorithm which has been defined for positioning symbols within a character box of predetermined width and adding appropriate escapement. This technique is similar to that set forth in the IBM Technical Disclosure Bulletin 23, 3513 (January 1981).

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Universal Print Font

There is described a font for use in an ink jet printer, or the like, which reduces from three to one the number of fonts required to support 10 and 12 pitches and proportional spacing. Printing of received data regardless whether it is 10 or 12 pitch or proportionally spaced may be supported. The font is implemented by using a placing algorithm which has been defined for positioning symbols within a character box of predetermined width and adding appropriate escapement. This technique is similar to that set forth in the IBM Technical Disclosure Bulletin 23, 3513 (January 1981).

The font also provides a means to correctly default to a selected typestyle in the correct pitch. Current automatic font-selection systems use a list of available electronic fonts to select the type style. The text is keyed using the selected font. At output time, the text will print from the selected font. If the text is printed on a machine without the selected typestyle or pitch, the next smaller pitch is selected. Using the smaller pitch may cause tab underruns and a misrepresentation of text.

Ink jet printers used in word processing systems include an electronic font which is a character generator for up to 256 8-bit characters. The universal font contains only 3, 4, and 5 escapement unit (EU) characters. An escapement unit is 1/60 of an inch in width.

All proportionally spaced characters currently defined with escapement greater than four EUs will print with five EU character width. For proportional spacing, 3, 4, and 5 EU characters will maintain that character width. The font also contains two each of the following characters: 1, f, t, i, j and 1. The extra characters print with five EU character widths, and are needed to support 10 and 12 pitch with the proper print quality. The universal print font differs from the normal proportionally spaced (PSM) font as follows:...