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. 10, 1993
Filed:
Jun. 12, 1992
Donald S Rimai, Webster, NY (US);
Mark C Zaretsky, Rochester, NY (US);
Bruno Primerano, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method and apparatus for determining the charge-to-mass ratio of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus uses a biased electrode for attracting toner particles thereto, and a microprocessor-based logic and control unit for sampling the mass of toner particles deposited on the electrode after the deposited toner particles have neutralized the electric field produced by the electrode bias. This toner mass information, together with certain toner constants and known parameters, is used by the logic and control unit to calculate the toner's charge-to-mass ratio. The output of the apparatus is useful for controlling process parameters (e.g. primary charging and exposure levels, development electrode bias, toner concentration) which affect image quality.