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. 05, 1988
Filed:
Jul. 28, 1986
Applicant:
Inventors:
Michael Doring, Hamburg, DE;
Peter Wohlenberg, Hamburg, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72379 ; 72465 ; 72471 ;
Abstract
The invention relates to a method of impressing channels having a cross-sectional area of less than 1 mm.sup.2, notably less than 3000 .mu.m.sup.2, into the surface of an object, notably for the formation of damping channels of ink jet printer heads. The impression of channels having a small cross-sectional area can be performed with high precision by inserting a wire-shaped element (5) between the surfaces of the object (2) and of a plane die (1) in the position of the channel (3, 4, 12) to be formed, after which the die (1) is pressed until it contacts the surface of the object (2).