Plotter

US4384298A · kind A · utility

Assignee

• Hewlett-Packard Company, L.P. · US

Inventors

• Lawrence LaBarre · Mountain View, US
• Bernard M. Oliver · Los Altos Hills, US
• Charles E. Tyler · Sunnyvale, US
• Dennis C. Thompson · Campbell, US
• Armand P. Neukermans · Palo Alto, US
• Douglass McManigill · Palo Alto, US

Key dates

• Filing date: Mar 16, 1982
• Grant date: May 17, 1983
• Expiry date: Mar 16, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G2215/0183
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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.