The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1981
Filed:
Feb. 13, 1980
Rolf Paschen, Elmshorn, DE;
Rolf Martens, Hamburg, DE;
Koh-I-Noor Rapidgoraph, Inc., Bloomsbury, NJ (US);
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.