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. 24, 1995
Filed:
Feb. 03, 1994
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention aims to provide a deformed toner having a narrow toner particle size distribution, a simple manufacturing method of same, and an imaging apparatus using same. The toner particles are characterized in having an average diameter of d (d is in a range of 4-15 .mu.m), and that a volumetric fraction of the particles having the diameter in a range of d.+-.0.2 d equals to or exceeds 90% of total volume of the particles, and further, when a specific surface area of the toner per 1 cm.sup.3 determined by a BET method is expressed by A (m.sup.2/ g) and a specific gravity of the particle is expressed by D (g/cm.sup.3), A of the particles stands in a range expressed by an equation, 7/(D.multidot.d).ltoreq.A.ltoreq.10/(D.multidot.d). An image having a preferable definition can be obtained by improving a resolution of image by making the particle size distribution of toner particles narrow, and providing the toner having an electrification charge at least 10 .mu.C/g with a narrow distribution.