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:
Dec. 31, 2002
Filed:
Mar. 06, 2000
Applicant:
Inventors:
Larry Oral Aulick, Cynthiana, KY (US);
Robert Glenn Smith, Georgetown, KY (US);
Mark Stephen Weisman, Jr., Lexington, KY (US);
Assignee:
Lexmark International Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/110 ; B29C 4/112 ; B32B 1/32 ;
U.S. Cl.
CPC ...
B29C 4/110 ; B29C 4/112 ; B32B 1/32 ;
Abstract
To make a seamless tube of polyimide, an amount of polyamic acid precursor to constitute the final tube is applied eveny as a solution to a cylindrical mandrel. The mandrel is rotated while a canted doctor blade smoothes the solution. The solvent is then expelled and the remaining precursor cured by heat.