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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.:

US 4963454 B1

PDFFull Text
Date of Patent:
Oct. 16, 1990

Filed:

Oct. 03, 1986

Method for developing electrostatic images using magnetic brush

Applicant:
Inventors:

Koji Yano, Tokyo, JP;

Nobuhiro Miyakawa, Ashiya, JP;

Teruaki Higashiguchi, Tokyo, JP;

Kazuo Yamamoto, Tokyo, JP;

Yoshinobu Kawakami, Tokyo, JP;

Assignee:

Mita Industrial Co., Ltd., Osaka, JP;

Attorney:

Sherman and Shalloway

Primary Examiner:

John L Goodrow

Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
4301066 ; 430122 ; 430137 ;
Abstract

In an electrophotographic developing method using a magnetic brush consisting of a mixture of magnetic carrier and an electroscopic toner, development is carried out at a toner concentration (Ct. %) in the mixture, which satisfies the requirement represented by the following formula: ##EQU1## wherein Sc stands for the specific surface area (cm.sup.2 /g) of the carrier, St stands for the specific surface area (cm.sup.2 /g) of the toner, and k is a number of from 0.90 to 1.14. A toner image having a high quality can be obtained according to this method.

Find Patent Forward Citations

Yano, Koji. (1990). Method for developing electrostatic images using magnetic brush (U.S. Patent No. 4963454). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4963454

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