Apparatus and method for generating a variable line width

Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element

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33 181, 346140R, G01D 1516

Patent

active

049050150

ABSTRACT:
The invention is a method and a plotter for automated drawing and writing that provides a drawn line of variable width, where the width is independent of the motion of the plotter pen or the shape of the line drawn. The apparatus includes a plotter having a table for receiving the medium upon which the line will be drawn, a pen slider translatable with respect to the table parallel a first axis (nominally designated the "X" axis) and a pen holder for receiving the pen translatable with respect to the slider parallel a second axis (nominally designated the "Y" axis) that is perpendicular the X axis. The pen holder maintains the pen at a known angular orientation with respect to a third axis (nominally designated the "Z" axis) perpendicular the X and Y axes. The apparatus also includes a digital computer which controls the pen to apply ink of selectable and variable widths along a line, independent of line shape and orientation with respect to the X and Y axes. The computer controls both the angular orientation of the pen tip with respect to the paper and the pressure applied between the pen and the paper, thereby selectably controlling line width.

REFERENCES:
patent: 1613970 (1927-01-01), Tanner
patent: 3730975 (1973-05-01), Kono
patent: 4183030 (1980-01-01), Kaieda
patent: 4467525 (1984-08-01), Logan
patent: 4607265 (1986-08-01), Onoda
patent: 4736211 (1988-04-01), Sieber

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