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. 07, 1989
Filed:
Aug. 13, 1984
Applicant:
Inventor:
Harold E Dunlap, St. Petersburg, FL (US);
Assignee:
Thermo Electron-Web Systems, Inc., Waltham, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ;
U.S. Cl.
CPC ...
134 15 ; 152565 ; 1525651 ; 1525652 ; 1525653 ; 100174 ; 241112 ; 162281 ; 162 99 ; 162272 ; 210396 ; 210397 ; 118652 ;
Abstract
A doctor blade assembly has a doctor blade supported in a blade holder. The blade has a projecting front edge adapted to be placed in contact with a moving surface to be doctored, and a rear edge adapted to be received in the blade holder. The blade is preloaded in a manner such that tensile stresses are induced in the front edge thereof. The level of such tensile stresses is below the yield strength of the blade material, yet high enough to prevent compressive stresses from developing at the blade front edge as a result of heat being generated by frictional contact between the blade and the moving surface being doctored.