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:
May. 13, 1986
Filed:
Dec. 22, 1980
Applicant:
Inventors:
Rudolf Boiko, Hanover, DE;
Gunter Ulrich, Hanover, DE;
Assignee:
Pelikan AG, Hanover, DE;
Primary Examiner:
Int. Cl.
CPC ...
B65B / ; B43K / ;
U.S. Cl.
CPC ...
141-1 ; 118 50 ; 141-4 ; 141 205 ; 401190 ; 401176 ;
Abstract
A ball point pen cartridge capable of being pressurized in a pressure vessel including an end stopper having an enlarged section shaped to seal the end of a cartridge tube, a narrower section connected to the enlarged portion and extending into the cartridge, an axial tube running completely through the enlarged section and partly through the narrower section, a radial tube in the narrower section that intersects the axial tube and a flexible, gas impervious tube surrounding the narrower section to form a check valve with the radial tube.