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:
Dec. 07, 2004
Filed:
Dec. 13, 2002
Masahito Yamazaki, Tokyo, JP;
Jiro Takemoto, Tokyo, JP;
Hiromi Ueno, Tokyo, JP;
Koji Akiyama, Tokyo, JP;
Jean-Philip Hulin, Poing, DE;
Josef Knott, Poing, DE;
Manfred Münz, Poing, DE;
Andreas Paul, Poing, DE;
OCE Printing Systems GmbH, Poing, DE;
Abstract
The present invention describes a process for preparing a toner mixture comprising mixing a first toner with at least one further toner wherein the first toner has an acid value of from 0.1 to 30 mgKOH/g and comprises at least one binder resin and at least one coloring agent wherein said binder comprises as the main component a polyester resin and wherein the further toners comprise at least a binder resin and optionally at least one coloring agent. It also describes a developer composition comprising said toner mixture and optionally a carrier. The new toner mixture does not show any de-mixing phenomenon during repeated use.