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:
Apr. 13, 1982
Filed:
Jun. 13, 1979
Applicant:
Inventor:
Hans-Dieter Rosel, Altdorf, DE;
Assignee:
Firma J. S. Staedtler, Nuremberg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; B41J / ;
U.S. Cl.
CPC ...
3461 / ; 137539 ;
Abstract
An apparatus for controlling the feed of writing fluid to a writing device comprises a writing fluid supply container, a source of compressed air and a first valve in a first conduit between the source of compressed air and the supply container, the first valve being adjustable depending on the working condition of the writing device. A second valve is provided in a second conduit between the supply container and the writing device, the second valve being automatically self-regulating depending on the pressure of the writing fluid at the writing device, whereby droplet formation is prevented.