Ink language for a two color printer

• US 5,134,493 A
• Filed: 09/06/1991
• Issued: 07/28/1992
• 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: Laman, Robert R., Tagami, Joanne M.
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): FRAHM, ERIC S
• Application Number:
  US07/755,984
• Time in Patent Office: 326 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: 358/296
• CPC Class Codes: G06K 15/02 using printers
• CPC Class Codes: G06K 2215/0057 Sizing and resolution changes
• CPC Class Codes: G06K 2215/0094 Colour printing
• CPC Class Codes: Y10S 347/90 Data processing for electrostatic recording

Abstract

A programming language optimized for the specification of inks for a printing system using two colorants, black plus a highlight color. The first group of statements name the primary colors such as black and red or magenta. Next specified are the catalog name and the palettes which make up the catalog. A palette is a collection of inks, each ink being defined as a tile composed of two bit maps which together are referred to as a screen, each bit map identifying the pixels in the tile to be printed in the associated primary color. Each bit pattern line is specified in the language by an equivalent binary number.

Claims

1. A printing system for printing in any combination of two colorants on an output medium, comprising:

means for specifying two original bit maps of pixels by a plurality of numbers, each of said original bit maps having a bit pattern, each number specifying the bit pattern of a line of one of said bit maps, the two bit maps having different pixel patterns,

means for replicating the original bit maps to form larger bit maps,

means for generating a number of characters, each character comprising two bit maps of equal size and unequal pattern,

means for grouping a number of characters of various sizes into a font, and

a printer for printing a document using said font, one bit map of each character being used to print in each colorant of the printer.

2. The printing system of claim 1 wherein said fonts are grouped into palettes and palettes are grouped into catalogs.

3. The method of claim 1 wherein one of said two colorants is black.

4. The method of claim 2 wherein a bit map or character can be transferred between catalogs and between palettes.

5. The method of claim 1 wherein the pixels in each bit map may either be spread relatively evenly over the bit map to result in an even distribution of pixels, or may be grouped to create a visible texture.