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:
May. 05, 1981
Filed:
Aug. 09, 1979
Piet M Extra, Tegelen, NL;
Taco H van den Honert, Venlo, NL;
Jacobus J van Lieshout, Grubbenvorst, NL;
Oce-Nederland B.V., Venlo, NL;
Abstract
In a system for developing electrostatic images on a moving photoconductive support by contact with a brush of two-component developer powder carried on a moving surface, in which the toner content of the powder is controlled in response to optical sensings of the reflectance of the brush at a location just beyond the developing zone, objectionable fluctuations of the toner concentration are avoided by shaping the developer brush to a constant layer thickness, for instance by reducing its thickness to about 0.5 to 0.6 mm, as the brush is being transported from the developing zone so that the sensings of the reflectance will occur at a constant distance from the brush. As an aid for adjusting or checking the operation of the toner control system, a reference surface having the same reflectance as a developer layer of the prescribed thickness and toner concentration is inserted in place of the brush at the location where reflectance is sensed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile