Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1987-09-29
1989-02-28
Goldberg, E. A.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
354 4, G01D 942, G03B 4100
Patent
active
048090280
ABSTRACT:
A light pen for converting a conventional graphics plotter into a photoplotter includes a housing containing an electrically powered light source, a battery and a normally open switch. The housing has an aperture opposite the light source. The light pen replaces an ink pen in the plotter. When the light pen is urged against a photosensitive sheet in the plotter, the normally open switch is closed, the light pen is energized and the light pen is transmitted to the sheet to illuminate it. The self-contained light pen is free of trailing electrical and optical cables that might interfere with plotter speed and accuracy.
REFERENCES:
patent: 3776113 (1973-12-01), Parks et al.
patent: 3903527 (1975-09-01), Frehling
patent: 4363539 (1982-12-01), Gerber
Description of Western Graphtec, Inc. Photo Pen, Design Graphics World Magazine, Aug. 1987, p. 44.
Henningsgard, "Photoplotters: Creating the Critical Shadows", Printed Circuit Design, Sep. 1987, pp. 8-15.
Peddie, "Considerations for Choosing an In-House Photoplotter", Printed Circuit Design, Sep. 1987, pp. 17-21.
Hill, "Laser Photoplotting Technology," Printed Circuit Design, Sep. 1987, pp. 22-23.
Langley, "Plot your Artwork without Photoplotting", Printed Circuit Design, Sep. 1987, pp. 24-32.
Newman, "PCB Artwork from a Plotter", Printed Circuit Design, Sep. 1987, pp. 40-41.
Curatolo Joseph G.
Evans Larry W.
Goldberg E. A.
Reinhart Mark
The Standard Oil Company
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