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:
Aug. 23, 1977
Filed:
May. 03, 1976
Frederick R Ruckdeschel, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An apparatus which regulates the developability characteristics of a development system employing a developer mixture comprising at least carrier granules and toner particles. A transparent electrode attracts toner particles from the carrier granules. Light rays are transmitted through the electrode with the particles thereon. Sensors having peak transmittances corresponding to the peak transmittance and absorbence of the toner particles, detect the intensity of the light rays transmitted through the electrode and generate electrical output signals indicative thereof. These signals are processed and a control signal is developed which regulates the dispensing of additional toner particles into the developer mixture. In this manner, the concentration of toner particles within the developer mix is adjusted.