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. 24, 1990
Filed:
Dec. 05, 1988
Applicant:
Inventor:
Robert E Lafler, Charlton City, MA (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B41F / ; C09D / ;
U.S. Cl.
CPC ...
101141 ; 101142 ; 101148 ; 101452 ; 106 20 ; 106 30 ;
Abstract
A wet laid watermark of uncoated paper is simulated by the use of a resin or resin-plasticizer mixture dissolved in a slow evaporating, high boiling solvent. A sufficient quantity of the low viscosity solution is printed onto an uncoated paper sheet of stationery grade by a standard flexographic press to penetrate the paper fiber and deposit a non-tacky solid having a refractive index which closely approximates that of cellulose. The resulting image of the print is visible to both faces of the paper sheet.