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:
Feb. 06, 1996
Filed:
Apr. 30, 1993
Applicant:
Inventor:
Jeffrey J Anderson, Camas, WA (US);
Assignee:
Tektronix, Inc., Wilsonville, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 71 ; 291638 ; 210488 ; 347 93 ;
Abstract
An internal ink filter (12) located within an ink jet print head (10) is formed by overlapping filter portions (100 and 102) of two laminated plates (22 and 24) that comprise the print head. Each plate includes an array of holes (120) in the filter portion. The individual holes have an opening dimension (122) such that the plates can be easily manufactured using conventional techniques, although the opening dimension may be too large for effective filtering. The plates are juxtaposed with the holes of each plate partly overlapping the holes of the other plate. The areas of overlap define a filter pore smaller than the individual holes in each plate.