Ink catalog for a two color printer

• US 5,153,739 A
• Filed: 09/06/1991
• Issued: 10/06/1992
• Est. Priority Date: 09/06/1991
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Gaines, Mark, Laman, Robert R.
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): FRAHM, ERIC S
• Application Number:
  US07/756,245
• Time in Patent Office: 396 Days
• Field of Search: 358/75, 358/296, 358/298, 358/300, 346/157, 355/38, 355/326, 355/327, 355/328
• US Class Current: 358/300
• CPC Class Codes: G06K 15/02 using printers
• CPC Class Codes: G06K 2215/0028 characterised by the format per se
• CPC Class Codes: G06K 2215/0094 Colour printing

Abstract

A catalog of fonts, each font differing with the others in the bit patterns contained in its characters which when printed yield a different color, all fonts comprising the same number of identical characters, the characters being a predetermined number of shapes that can be assembled together to form an area. To the printer, the catalog appears to be a number of fonts, and can therefore be accessed by a printer that has a typical hardware system for printing text. However, when printed using a two-color printer, the printed output will be an area of any size filled in with the specified color.

Claims

1. A two color printer having a memory, which printer uses two primary colorants having different colors to print, on an output medium which has a color, a highlight area of variable size in a predetermined color which color is a combination of the color of the medium and the two primary colorants, comprising:

a number of fonts in said printer memory, each font differing from the other fonts only in color, each font comprising a number of characters that differ from each other only in size and shape, each character comprising two equally sized and shaped bit maps, each bit map comprising bits, one bit map having a pattern of bits indicate pixels to be printed in one colorant, the other bit map having a pattern of bits indicate pixels to be printed in the other colorant, a resultant patterns of pixels, and therefore the color of the character, being equal for all characters in a font.

2. The printer of claim 1 further comprising:

a print job controller to control said printer which controller specifies for said highlight area the characters of a font to be used to print the hightlight area, said characters exactly covering said area by use of either whole characters or characters with a reduced area on one edge, where original edges of said reduced characters are positioned against other characters of the highlight area, and the reduced edges are positioned along a periphery of said highlight area.