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. 30, 1980
Filed:
Jul. 09, 1979
Raymond G Cormier, Nashua, NH (US);
Leo O Lutz, Hollis, NH (US);
Nashua Corporation, Nashua, NH (US);
Abstract
A metering roll, employed between the developing station and the transfer station of a photocopier which uses a liquid toner, controls the thickness of the liquid on the photosensitive drum surface when it is presented to the transfer station. Elements fixed between the drum and roll maintain the central metering portion in a substantially constant spaced apart relationship to the photosensitive drum surface and thereby tend to limit and control the thickness of developer on the drum surface at the transfer station. The elements have different surfaces in sliding, frictional contact with the drum and roll respectively. In one embodiment the elements are strips with opposite parallel surfaces, one in contact with the drum and the other in contact with the roll. In another, the ends of the strip are mounted on reels so that the strip may be moved to vary wear points on the strip if any appear.