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:
Mar. 25, 1980
Filed:
Feb. 27, 1978
John M Lucas, Montreal, CA;
Serge Gracovetsky, St. Lambert, both of Quebec, CA;
Other;
Abstract
A sensing element having a face adapted to contact the surface of a travelling web or sheet of paper, said face formed into a convex surface that substantially is in the form of a single base segment of a sphere having a radius between 35 and 10 mm. The surface of the web is pressed against the face so that the area of contact between the surface and the face has a minimum dimension of 2 mm. In the preferred application of the present invention the element is as an optical window in an optical sensing device wherein light is passed through the window in a direction and is reflected to sensors positioned on the same side of the window as the light source.