Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2001-02-06
2002-08-27
Chapman, Mark (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S115000, C430S108100, C430S108300, C399S237000, C399S296000
Reexamination Certificate
active
06440629
ABSTRACT:
In copending application U.S. Ser. No. 09/1777,423, filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, there is illustrated a liquid developer comprised of a nonpolar liquid, thermoplastic resin, colorant, and a silica charge acceptance additive; U.S. Pat. No. 6,335,136. the disclosure of which is totally incorporated herein by reference, illustrates a liquid developer comprised of a nonpolar liquid, thermoplastic resin, colorant, and a wax charge acceptance additive; U.S. Pat. No. 6,372,402, filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, illustrates a liquid developer comprised of a nonpolar liquid, thermoplastic resin, optional colorant, and an inorganic filler; U.S. Pat. No. 6,346,357, filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, illustrates a liquid developer comprised of a nonpolar liquid, thermoplastic resin, optional colorant, and an alumina charge acceptance additive; U.S. Pat. No. 6,348,292, filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, illustrates a liquid developer comprised of a nonpolar liquid, resin, optional colorant, and an alkaline earth charge acceptance additive; and U.S. Ser. No. 09/777,301, filed concurrently herewith, the disclosure of which is totally incorporated herein by reference, illustrates an imaging apparatus comprising a support member including a support surface for supporting a layer of marking material; a marking material supply apparatus for depositing marking material on the surface of said support member to form a layer of marking material thereon; a charging source for selectively delivering charge species to the layer of marking material in an imagewise manner to form an electrostatic latent image in the layer of marking material, wherein the electrostatic latent image includes image areas of a first charge voltage and nonimage areas of a second charge voltage distinguishable from the first charge voltage; and a separator member for selectively separating portions of the marking material layer in accordance with the latent image in the marking material layer to create a developed image and wherein said marking material is comprised of a liquid developer comprised of a nonpolar liquid, resin, colorant, and a charge acceptance component comprised of a cyclodextrin.
Illustrated in U.S. Pat. No. 6,187,499, “Imaging Apparatus”, filed Jan. 27, 2000, the disclosure of which is totally incorporated herein by reference is an imaging apparatus, comprising.
an imaging member with an electrostatic latent image formed thereon, the imaging member containing a surface capable of supporting marking material;
an imaging device for generating the electrostatic latent image on the imaging member, wherein the electrostatic latent image includes image areas defined by a first charge voltage and nonimage areas defined by a second charge voltage distinguishable from the first charge voltage;
a marking material supply apparatus for depositing marking material on the surface of the imaging member to form a marking material layer thereon adjacent the electrostatic latent image on said imaging member;
a charging source for selectively delivering charges to the marking material layer in an imagewise manner responsive to the electrostatic latent image on the imaging member to form a secondary latent image in the marking material layer having image and nonimage areas corresponding to the electrostatic latent image on said imaging member; and
a separator member for selectively separating portions of the marking material layer in accordance with the secondary latent image in the marking material layer to create a developed image corresponding to the electrostatic latent image formed on the imaging member, and wherein said marking material is comprised of a liquid developer comprised of an optional nonpolar liquid, resin, colorant, and a charge acceptance component comprised of a cyclodextrin.
Illustrated in U.S. Pat. No. 5,966,570, the disclosure of which is totally incorporated herein by reference, is an imaging apparatus, comprising:
support member including a support surface for supporting a layer of marking material;
a marking material supply apparatus for depositing marking material on the surface of the support member to form the layer of marking material thereon;
a charging source for selectively delivering charge species to the layer of marking material in an imagewise manner to form an electrostatic latent image in the layer of marking material, wherein the electrostatic latent image includes image areas defined by a first charge voltage and nonimage areas defined by a second charge voltage distinguishable from the first charge voltage; and
a separator member for selectively separating portions of the marking material layer in accordance with the latent image in the marking material layer to create a developed image.
Illustrated in U.S. Pat. No. 5,627,002, the disclosure of which is totally incorporated herein by reference, is a positively charged liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, pigment, a charge director, and a charge control agent comprised of a cyclodextrin or a cyclodextrin derivative containing one or more organic basic amino groups. A number of the appropriate components of this patent, especially the cyclodextrins may be selected for the invention of the present application in embodiments thereof and wherein with the present invention the cyclodextrins, especially beta-cyclodextrin function as a charge, either positive, or negative, acceptance component, agent, or additive.
In U.S. Pat. Nos. 5,366,840; 5,346,795 and 5,223,368, the disclosures of which are totally incorporated herein by reference, there are illustrated developer compositions with aluminum complex components and which components may be selected as a charge acceptance additive for the developers of the present invention.
Disclosed in U.S. Pat. No. 5,826,147, the disclosure of which is totally incorporated herein by reference, is an electrostatic latent image development process and an apparatus thereof wherein there is selected an imaging member with an imaging surface containing a layer of marking material and wherein imagewise charging can be accomplished with a wide beam ion source such that free mobile ions are introduced in the vicinity of an electrostatic image associated with the imaging member.
The appropriate components and processes of the above copending applications and patents may be selected for the present invention in embodiments thereof.
BACKGROUND OF THE INVENTION
This invention is generally directed to liquid developer compositions and processes thereof, and wherein there can be generated excellent developed images thereof in, for example, an imaging apparatus, comprising
support member including a support surface for supporting a layer of marking material;
a marking material supply apparatus for depositing marking material on the surface of the support member to form the layer of marking material thereon;
a charging source for selectively delivering charge species to the layer of marking material in an imagewise manner to form an electrostatic latent image in the layer of marking material, wherein the electrostatic latent image includes image areas defined by a first charge voltage and nonimage areas defined by a second charge voltage distinguishable from the first charge voltage; and
a separator member for selectively separating portions of the marking material layer in accordance with the latent image in the marking material layer to create a developed image, and wherein there is selected as the marking material a liquid developer containing a charge acceptance agent, such as a cyclodextrin, or an aluminum complex and wherein the developer contains no charge director, or wherein the developer contains substantially no charge director. Preferably the liquid developer of the present invention is clear in color and is compr
Pan David H.
Zhao Weizhong
Chapman Mark
Palazzo E. O.
Xerox Corporation
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