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:
Apr. 02, 1991
Filed:
Jun. 15, 1989
Lawrence J Donivan, Rochester, NY (US);
Joseph F Laukaitis, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Apparatus is disclosed for controlling the charge-to-mass ratio of developed electrostatic images. An electrostatographic reproduction machine for developing an electrostatic latent image with charge toner particles produces a control signal characteristic of the ratio of toner partical electrostatic charge to the toner particle mass, and the charge-to-mass ratio is adjusted in response to the control signal. The control signal is produced by comparing the ratio of toner particle electrostatic charge to the toner particle mass of a toned test patch. The ratio is adjusted by means of ions directed to the toner particles. The ion source may be capable of producing positive and negative ions, and may be a corona charger.