Hewlett-Packard Company

Lawrence J LaBarre

Kent D Vincent

Armand P Neukermans

John Phillip Ertel

William David Holland

Douglass McManigill

Bernard M Oliver

Rueiming Jamp

Wen-Tsing Chen

Dennis C Thompson

Charles E Tyler

Stephen R Anderson

Steven W Lee

A desktop printing system for use with microprocessor-based computers includes the modular combination of a color printer and a monochrome text printer. Preferably, the color printer is of the type which prints color graphics incrementally and the text printer is of the type which prints monochrome text continuously. In operation, printing information is segregated into color and text components, and the color printer is controlled to print only color components while the text printer is controlled to print only monochrome text components.

Text and color printing system

An X-Y recorder for high speed plotting on a plain web, i.e., a web without registration holes or other special means to maintain alignment of the web during plotting. Two embodiments of these plotters are disclosed with one degree of motion being achieved by moving the web and the second degree of motion being obtained by moving a pen assembly substantially perpendicularly to the movement of the web. To enhance the repeatability of the plotting on the web as it is moved back and forth, a random rough surfaced drive wheel assembly is included with that wheel surface making indentations along one surface of the driven edge of the web as it is first passed through the drive wheel assembly. Then as the web is reversed, these indentations substantially remesh with the random rough surface of the drive wheels.

Plotter

Growing community of inventors

Mountain View, CA, United States of America

Lawrence J LaBarre