Process and apparatus for automatic drafting devices

Details Process and apparatus for automatic drafting devices Process and apparatus for automatic drafting devices

1980-02-13

1981-08-04

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 11, G01D 1516, B43L 1300, B43K 800

Patent

active

042825369

ABSTRACT:
Process and apparatus for drawing with several tube pens which may, alternatively, be brought into contact with a drawing surface, to draw different line widths. The tube pens are connected to an ink supply delivery mechanism which ensures that the writing fluid pressure in each tube pen is kept at a given value. The ink supply delivery mechanism supplies writing fluid to that tube pen having the finest line width, and excess writing fluid flows successively therefrom through an overflow, and to successively lower overflows of the tube pens with the next largest line widths, finally reaching the tube pen with the broadest line width, and eventually, by way of a storage container, to the ink supply delivery mechanism.

REFERENCES:
patent: 1849084 (1932-03-01), Hand
patent: 3152858 (1964-10-01), Wadey
patent: 3371350 (1968-02-01), Sanderson
patent: 3401401 (1968-09-01), Read
patent: 3522607 (1970-08-01), Felton
patent: 3708798 (1973-01-01), Hildenbrand
patent: 3950762 (1976-04-01), Anderka
patent: 4097874 (1978-06-01), Anderka
patent: 4173020 (1979-10-01), Anderka
patent: 4188634 (1980-02-01), Anderka

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