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:
Mar. 25, 2003
Filed:
Jan. 12, 2001
Eiichi Akutsu, Ashigarakami-gun, JP;
Shigemi Ohtsu, Ashigarakami-gun, JP;
Lyong Sun Pu, Ashigarakami-gun, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image forming method wherein an aqueous dispersion is prepared in a vessel of an apparatus. The aqueous dispersion contains an electrodeposition material including a fine particle coloring material, and a polymer which is chemically dissolved, or is deposited and precipitated, by a change in pH. The vessel can hold a liquid, and has therein an image supporting member. The image supporting member has at least an electrode, which can supply current or an electric field in accordance with an image pattern, and a surface which can support an image; and a counter electrode which forms a pair of electrodes together with the electrode. The electrodeposition material is deposited and precipitated to form an image by supplying current or an electric field in accordance with an image pattern to the image supporting member and the counter electrode and by changing the pH value of the aqueous dispersion in the vicinity of the image supporting surface of the image supporting member. The polymer in the electrodeposition material has both hydrophobic groups and hydrophilic groups in the molecule, the proportion of the number of the hydrophobic groups to the total number of hydrophilic groups and the hydrophobic groups in the polymer is in the range of from 40 to 80%, 50% or more of the hydrophilic groups can reversibly change from hydrophilic groups to hydrophobic groups due to a change in pH value, and the acid value of the polymer is on the range of from 30 to 400.