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:
Oct. 19, 1993
Filed:
Mar. 03, 1992
Applicant:
Inventors:
James O Bowlby, Jr, San Jose, CA (US);
David R Nygren, Berkeley, CA (US);
Assignee:
Bowlby Labs, Inc., Campbell, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; G03G / ; G03G / ;
U.S. Cl.
CPC ...
3461601 ; 355208 ; 355273 ;
Abstract
An apparatus for improved paper marking is provided which increases the percentage moisture content of the paper, thereby decreasing its electrical resistivity. The paper is then dried at selected pixels which results in high electrical resistivity of those pixels. Subsequently, the paper is charged with a high negative voltage. The areas with high moisture content rapidly discharge the applied charge, whereas the areas with low moisture content retain the charge. Finally, the areas with retained charge attract toner and are fused to the paper.