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:
Oct. 10, 1989
Filed:
Mar. 15, 1988
Hatsuo Tajima, Matsudo, JP;
Atsushi Hosoi, Tokyo, JP;
Norihisa Hoshika, Kawasaki, JP;
Hiroshi Tajika, Yokohama, JP;
Masahide Kinoshita, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a developing apparatus using magnetic carrier particles and toner particles under the influence of an alternating current. One embodiment of the present invention includes a developer which is a mixture of toner particles and resin coated magnetic particles. An alternating electric field is formed between a latent image bearing member and developer carrying member to form a toner image corresponding to an electrostatic latent image. An electric resistivity curve of the magnetic particles on a coordinate graph, where the abscissa represents an electric field E (V/cm) applied to the magnetic particles and the ordinate represents an electric resistivity R (ohm-cm) of the magnetic particles, crosses a zone defined by lines, AB, BD, DC and CA, where