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US 4,584,253 AGranted
Electrophotographic imaging system
AssigneeXerox Corporation
InventorsJohn W. Lin, Lesley P. Dudek
Life of this patent
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AssigneeXerox Corporation
InventorsJohn W. Lin, Lesley P. Dudek
Estimating the term…
An electrophotographic imaging member is disclosed comprising a charge generation layer, a contiguous charge transport layer comprising an aromatic amine or hydrazone charge transport molecule in a continuous polymeric binder phase, and a cellulosic hole trapping material located on the same side of the charge transport layer as the charge generation layer, the cellulosic hole trapping material being free of electron withdrawing groups and having the structural formula ##STR1## wherein R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000. A process for using this electrophotographic imaging member is also disclosed.
An electrophotographic imaging member comprising a hole transport layer comprising an aromatic amine or hydrazone hole transport molecule in a continuous polymeric binder phase, a contiguous charge generation layer, and a cellulosic hole trapping material located in said charge generation layer or in a separate continuous layer having a thickness less than about 1 micrometer on the side of said charge generation layer opposite said hole transport layer, said charge generation layer comprising from about 0.01 percent by weight to about 15 percent by weight of said cellulosic hole trapping material based on the total weight of said charge generation layer, said separate layer comprising from about 0.01 percent by weight to about 100 percent by weight of said cellulosic hole trapping material based on the total weight of said separate layer, and said cellulosic hole trapping material being free of electron withdrawing groups and having the formula ##STR7## wherein each R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000.
An electrophotographic imaging member comprising a hole transport layer comprising an aromatic amine or hydrazone charge transport molecule in a continuous polymeric binder phase and a contiguous charge generation layer comprising a photoconductive charge generating material and from about 0.01 percent by weight to about 15 percent by weight of a cellulosic hole trapping material based on the total weight of said charge generation layer, said cellulosic hole trapping material being free of electron withdrawing groups and having the formula ##STR9## wherein each R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000.
An electrophotographic imaging member comprising a hole transport layer comprising an aromatic amine or hydrazone hole transport molecule in a continuous polymeric binder phase, a contiguous charge generation layer, and a separate continuous layer having a thickness less than about 1 micrometer on the side of said charge generation layer opposite said hole transport layer, said separate layer being free of electron withdrawing groups and consisting of cellulosic hole trapping material having the formula ##STR10## wherein each R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000.
An electrophotographic imaging process comprising providing an electrophotographic imaging member comprising a hole transport layer comprising an aromatic amine or hydrazone hole transport molecule in a continuous polymeric binder phase, a contiguous charge generation layer, and a cellulosic hole trapping material located in said charge generation layer or in a separate continuous layer having a thickness less than about 1 micrometer on the side of said charge generation layer opposite said hole transport layer, said charge generation layer comprising from about 0.01 percent by weight to about 15 percent by weight of said cellulosic hole trapping material based on the total weight of said charge generation layer, said separate layer comprising from about 0.01 percent by weight to about 100 percent by weight of said cellulosic hole trapping material based on the total weight of said separate layer, and said cellulosic hole trapping material being free of electron withdrawing groups and having the formula ##STR11## wherein each R is independently selected from the group consisting of hydrogen and a substituted or unsubstituted group selected from the group consisting of an alkyl group containing 1 to 20 carbon atoms, a hydroxyalkyl group containing 1 to 20 carbon atoms, a hydroxyether group containing 1 to 20 carbon atoms and an aminoalkyl group containing 1 to 20 carbon atoms, and n is the number of cellulose repeating units from 1 to 3,000, uniformly depositing an electrostatic charge on said imaging member, exposing said imaging member to activating radiation in image configuration to form an electrostatic latent image on said imaging member, contacting said electrostatic latent image with electrostatically attractable toner particles to form a deposited toner image in image configuration, transfering said toner image to a receiving member, erasing any residual electrostatic charge on said imaging member and repeating said depositing, exposing, contacting, transfering and erasing steps.
Dependencies are inferred from the claim text.