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:
Nov. 12, 2002
Filed:
Aug. 10, 2001
Applicant:
Inventors:
Keith R. Rea, Florence, SC (US);
James F. Kick, Town & Country, MO (US);
Assignee:
Sonoco Development, Inc., Hartsville, SC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41M 5/00 ; B41J 2/17 ; B41J 2/175 ; B41J 2/930 ; G01D 1/100 ;
U.S. Cl.
CPC ...
B41M 5/00 ; B41J 2/17 ; B41J 2/175 ; B41J 2/930 ; G01D 1/100 ;
Abstract
An improved ink cartridge of the type used to dispense ink in automatic lithographic presses. The ink cartridge comprises a hollow cylindrical body for holding a supply of extrudable ink, a plunger and a dispensing fitment. The improvement comprises a valve member mounted over a central aperture in the dispensing fitment and a flexible molded plastic spring that biases the valve member in the closed position. The valve member opens when subjected to pressure from the ink and closes automatically and completely when the ink pressure is less than the biasing force of the flexible spring.