And Specified Charge Generator Layer Patents (Class 430/59.1)
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Patent number: 7662528Abstract: A charge generating composition including at least one charge generating material, at least one polymer binder, and at least one styrene-containing copolymer is disclosed.Type: GrantFiled: February 17, 2006Date of Patent: February 16, 2010Assignee: Xerox CorporationInventors: Jin Wu, Lanhui Zhang, Cindy C. Chen, Liang-bih Lin
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Patent number: 7662526Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, and wherein the charge transport layer contains a charge blocking agent, such as a benzoimidazole.Type: GrantFiled: May 4, 2007Date of Patent: February 16, 2010Assignee: Xerox CorporationInventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Marc J. Livecchi
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Publication number: 20100028791Abstract: An electrophotographic photoconductor that stabilizes electrical performances and prevents generation of image faults such as memories, irrespective of types of organic materials of resin binder and charge transport material, and variation of temperature and humidity of the operation environment. An electrophotographic photoconductor includes at least a photosensitive layer formed over a conductive substrate, wherein the photosensitive layer contains a cyclohexane dimethanol-diaryl ester compound represented by the formula (I): in formula (I), each of R1 through R10 represents independently, a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group of carbon number of from 1 to 5, a substituted or unsubstituted aryl group, or a substituted or unsubstituted alkoxy group of carbon number of from 1 to 5.Type: ApplicationFiled: April 5, 2007Publication date: February 4, 2010Applicant: Fuji Electric Device Technology Co.,Ltd.Inventors: Ikou Takaki, Yoichi Nakamura, Kazuki Nebashi
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Publication number: 20090325090Abstract: A photoconductor that includes, for example, a substrate, a first layer like a ground plane layer, an undercoat layer thereover wherein the undercoat layer contains an aminosilane and a phenolic resin, a photogenerating layer, and at least one charge transport layer.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Applicant: XEROX CORPORATIONInventors: Jin Wu, Dennis J. Prosser, Kathleen M. Carmichael, Sherri A. Toates, Kent J. Evans, Edward F. Grabowski
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Publication number: 20090325091Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a suitable phosphonate.Type: ApplicationFiled: June 30, 2008Publication date: December 31, 2009Applicant: XEROX CORPORATIONInventors: Jin Wu, Markus R. Silvestri, J. Robinson Cowdery-Corvan, David M. Skinner, Jean D. Van Epps, JR.
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Patent number: 7635548Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a self-assembled carbon nanotube material having pendant charge transport materials.Type: GrantFiled: August 8, 2006Date of Patent: December 22, 2009Assignee: Xerox CorporationInventor: Timothy P. Bender
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Patent number: 7629095Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, and a charge transport layer, where the charge generating layer includes a photogenerating material and a hydroxyl group-containing polymeric compound.Type: GrantFiled: July 19, 2006Date of Patent: December 8, 2009Assignee: Xerox CorporationInventors: Cuong Vong, Ah-Mee Hor
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Publication number: 20090297961Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a phenol polysulfide.Type: ApplicationFiled: May 30, 2008Publication date: December 3, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090297218Abstract: An electrophotographic photosensitive member having a charge generation layer containing a phenanthrene compound, a phenanthroline compound or an acenaphthene compound. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member.Type: ApplicationFiled: August 10, 2009Publication date: December 3, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Hideaki Nagasaka, Kunihiko Sekido, Michiyo Sekiya, Nobumichi Miki, Yosuke Morikawa
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Patent number: 7618758Abstract: A photoconductor containing an optional supporting substrate, a perylene silanol photogenerating layer, and at least one charge transport layer.Type: GrantFiled: August 30, 2006Date of Patent: November 17, 2009Assignee: Xerox CorporationInventors: Jin Wu, Nancy L. Belknap, Liang-Bih Lin
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Patent number: 7618756Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent.Type: GrantFiled: March 6, 2007Date of Patent: November 17, 2009Assignee: Xerox CorporationInventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
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Publication number: 20090280419Abstract: An electrophotographic photoreceptor is disclosed, comprising on or over an electrically conductive support a photosensitive layer containing a charge generation material and a charge transfer material, wherein the charge generation material is comprised of two or more compounds represented by the following formula wherein X and Y are each an alkyl group or a halogen atom, n is an integer of 1 to 6 and m is an integer of 0 to 6, and wherein the compounds differ in at least one of m and n of the formula.Type: ApplicationFiled: April 28, 2009Publication date: November 12, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tomoko SAKIMURA, Toyoko SHIBATA, Fumitaka MOCHIZUKI, Shinichi HAMAGUCHI, Masanori YUMITA
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Publication number: 20090239166Abstract: Imaging members useful in electrostatographic apparatuses, including printers, copiers, other reproductive devices, and digital apparatuses. More particularly, imaging members having nano polymeric gel particles embedded into one or more layers of the imaging member that provide for increased mechanical strength and improved wear.Type: ApplicationFiled: June 22, 2006Publication date: September 24, 2009Applicant: Xerox CorporationInventors: Satchidanand Mishra, Yuhua Tong, Kathleen Carmichael, Markus Silvestri, Susan Vandusen, Chieh-Min Cheng, Huoy-Jen Yuh, Cindy Chen, Lanhui Zhang
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Patent number: 7592113Abstract: An electrophotographic photosensitive member includes a support, a charge generation layer containing a charge generating material, and a binder resin, on the support, and a hole transport layer containing a hole transporting material, on the charge generation layer. The charge generation layer contains an acenaphthene compound represented by the following formula: Z401 and Z402 each independently represent an oxygen atom, a ?C(CN)2 group or a ?N Ph group; and R401 and R402 each independently represented a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group. The acenaphthene compound has the structure represented by the above formula (4) is contained in the charge generation layer in an amount of from 51% by weight to 80% by weight based on the weight of the binder resin in the charge generation layer.Type: GrantFiled: May 30, 2008Date of Patent: September 22, 2009Assignee: Canon Kabushiki KaishaInventors: Hideaki Nagasaka, Kunihiko Sekido, Michiyo Sekiya, Nobumichi Miki, Yosuke Morikawa
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Patent number: 7592112Abstract: A multilayer electrophotographic photoreceptor, comprising an electroconductive substrate, and at least an interlayer and a charge-generating layer formed on the substrate, wherein the interlayer comprises fine metal oxide particles and the interlayer and the charge-generating layer comprise anthraquinone derivative(s), and wherein the interlayer has a volume resistivity in a range of 1.0×108 ?·cm to 1.0×1013 ?·cm when an electric field of 106 V/m is applied thereto at 28° C. and 85% relative humidity. A process cartridge and an image forming apparatus using the multilayer electrophotographic photoreceptor are also provided.Type: GrantFiled: March 18, 2005Date of Patent: September 22, 2009Assignees: Fuji Xerox Co., Ltd., Xerox CorporationInventors: Shigeaki Shiino, Makoto Takemoto, Makoto Kusayanagi, Koichi Yasaku, Hirokazu Sakashita, Makoto Nishimura, Yu Qi, Nan-Xing Hu, Ah-Mee Hor
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Patent number: 7588872Abstract: An electrophotographic imaging member includes a substrate, an optional intermediate (undercoat) layer, a photogenerating layer, which can be a single layer of include separate charge generating and charge transport layers, and an optional overcoating layer, wherein the photogenerating layer or a sub-layer thereof include a carbon nanotube material.Type: GrantFiled: August 8, 2006Date of Patent: September 15, 2009Assignee: Xerox CorporationInventors: Liang-Bih Lin, Jin Wu, Daniel V. Levy, Cindy C. Chen, Richard H. Nealey, Kenny-Tuan Dinh
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Patent number: 7585604Abstract: An object of the present invention is to provide an electrophotographic photosensitive member having high durability and hardly causing sensitivity decrease even if short wavelength light, particularly light having a wavelength of 380 to 450 nm is used as exposure light, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member. The present invention includes an electrophotographic photosensitive member comprising a support and a photosensitive layer which is provided on the support and contains a charge generation material and a charge transport material, characterized in that the surface layer of the electrophotographic photosensitive member contains an aliphatic dicarboxylic acid polyester resin with a weight average molecular weight of 80,000 or more having a specific repeating structural unit, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member.Type: GrantFiled: September 5, 2005Date of Patent: September 8, 2009Assignee: Canon Kabushiki KaishaInventors: Harunobu Ogaki, Takakazu Tanaka, Kenichi Kaku, Akira Yoshida
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Publication number: 20090214260Abstract: An objective is to provide an organic photoreceptor exhibiting high sensitivity, suitable for exposure to a semiconductor laser having an emission wavelength of 350-500 nm or a light emitting diode, with which generation of memory images as well as image defects caused by very small charge leakage is inhibited, and also to provide an image forming apparatus fitted with the organic photoreceptor. Also disclosed is an organic photoreceptor possessing a charge generation layer and a charge transport layer provided on a conductive substrate, wherein the charge generation layer contains particles made of a condensed polycyclic pigment, having an average major axis length of 500 nm or less, an average aspect ratio of 2.5-5.0, and an aspect ratio variation coefficient of 16% or less.Type: ApplicationFiled: February 23, 2009Publication date: August 27, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tomoo SAKIMURA, Takeshi ISHIDA
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Patent number: 7560206Abstract: A photoconductor containing an optional supporting substrate, a silanol containing photogenerating layer, and at least one charge transport layer.Type: GrantFiled: July 12, 2006Date of Patent: July 14, 2009Assignee: Xerox CorporationInventors: Jin Wu, John S. Chambers, Satchidanand Mishra, Michael A. Morgan, Liang-Bih Lin
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Patent number: 7560207Abstract: An organic photoreceptor and an electrophotographic image forming apparatus including the organic photoreceptor are provided. The organic photoreceptor has the same advantage as a conventional laminated photoreceptor but improved electric properties such as higher photosensitivity and lower exposure potential.Type: GrantFiled: November 30, 2006Date of Patent: July 14, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Ji-young Lee, Beom-jun Kim
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Patent number: 7553592Abstract: An electrophotographic imaging member includes at least one layer including a hole transport material and a strong electron acceptor material, such as an electrophotographic imaging member including a substrate, a charge generating layer, a hole transport layer, and an optional overcoating layer, wherein at least one layer of the electrophotographic imaging member comprises a strong electron acceptor material.Type: GrantFiled: June 5, 2006Date of Patent: June 30, 2009Assignee: Xerox CorporationInventors: Hany Aziz, Gregory McGuire, Johann Junginger
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Patent number: 7527904Abstract: An imaging device including a substrate, a charge generating layer, and a charge transport layer is disclosed. A particular charge generating layer is disclosed that includes porphine, or its derivatives, to facilitate charge generation while suppressing ghosting and improving photoreceptor performance.Type: GrantFiled: December 19, 2005Date of Patent: May 5, 2009Assignee: Xerox CorporationInventors: Jin Wu, Liang-Bih Lin
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Patent number: 7514192Abstract: A photoconductive member component comprising a supporting substrate and thereover a photogenerating layer comprising a tetrahalobenzamidazolebenzene or a bis(tetrahalophenyl)biphenylbisimidazole of the alternative following formulas or dimers thereof wherein each of R1, R2, R3, R4, and R5 are the same or different and are independently selected from the group comprising hydrogen, alkyl, aryl, and halogen, and a charge transport layer component.Type: GrantFiled: December 12, 2005Date of Patent: April 7, 2009Assignee: Xerox CorporationInventors: James McConnell Duff, Timothy P. Bender, Cuong Vong, John F. Graham
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Publication number: 20090061338Abstract: A photoconductor comprising a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the photogenerating layer contains a boron containing compound.Type: ApplicationFiled: August 31, 2007Publication date: March 5, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090061340Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a photogenerating pigment or pigments, and a hydroxyalkoxy benzophenone.Type: ApplicationFiled: August 31, 2007Publication date: March 5, 2009Applicant: XEROX CORPORATIONInventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Dennis J. Prosser
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Publication number: 20090061336Abstract: A photoconductor comprising a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein said photogenerating layer contains a light stabilizer.Type: ApplicationFiled: August 31, 2007Publication date: March 5, 2009Applicant: XEROX CORPORATIONInventor: Jin Wu
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Publication number: 20090061337Abstract: A photoconductor comprising a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and where the photogenerating layer contains a triazine.Type: ApplicationFiled: August 31, 2007Publication date: March 5, 2009Applicant: XEROX CORPORATIONInventors: Jin Wu, Liang-Bih Lin, Daniel V. Levy, Marko D. Saban
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Patent number: 7498108Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer, and wherein said photogenerating layer contains at least one thiophosphate.Type: GrantFiled: June 15, 2006Date of Patent: March 3, 2009Assignee: Xerox CorporationInventors: Jin Wu, Satchidanand Mishra, Kent J. Evans, J. Robinson Cowdery-Corvan, Anthony M. Horgan, Geoffrey M T. Foley, Kathleen M. Carmichael, Liang-Bih Lin
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Patent number: 7491480Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the at least one charge transport layer contains at least one thiophosphate.Type: GrantFiled: June 15, 2006Date of Patent: February 17, 2009Assignee: Xerox CorporationInventors: Jin Wu, Satchidanand Mishra, Kent J. Evans, J. Robinson Cowdery-Corvan, Anthony M. Horgan, Geoffrey M T. Foley, Kathleen M. Carmichael, Liang-Bih Lin
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Patent number: 7476477Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer, and wherein the at least one charge transport layer contains at least one thiophosphate, and wherein the thiophosphate is present in an amount of from about 0.005 to about 0.09 weight percent.Type: GrantFiled: June 15, 2006Date of Patent: January 13, 2009Assignee: Xerox CorporationInventors: Jin Wu, Geoffrey M T. Foley, Edward C. Savage, Liang-Bih Lin
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Publication number: 20090004586Abstract: The present disclosure relates to an electrophotoconductive element comprising a conductive substrate, a charge generation layer including a charge generating compound and a charge transport layer. The charge generation layer includes a first polymer resin and second polymer resin to provide a blend including the charge generating compound. The first polymer resin may therefore indicate an energy at a half charge potential E0.5(POLYMER) upon exposure to light at a wavelength of about 350-500 nm. The blend then also indicates an energy at half charge potential E0.5(BLEND) upon exposure to light at a wavelength of about 350-500 nm. The second polymer resin of the blend is therefore selected to provide that E0.5(BLEND)<E0.5(POLYMER).Type: ApplicationFiled: June 29, 2007Publication date: January 1, 2009Inventors: Mark Thomas Bellino, David Glenn Black, Dat Quoc Nguyen, Weimei Luo, Scott Daniel Reeves
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Patent number: 7468229Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl thioether of the formula wherein R1, R2, and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and n is a number of from about 1 to about 10; and wherein a thiophosphate is contained in the photogenerating layer.Type: GrantFiled: June 15, 2006Date of Patent: December 23, 2008Assignee: Xerox CorporationInventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Michael S. Roetker, Kent J. Evans, Geoffrey M T. Foley, Anthony M. Horgan, Yonn K. Rasmussen, Satchidanand Mishra, Edward F. Grabowski, Liang-Bih Lin, Markus R. Silvestri
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Patent number: 7462431Abstract: Photogenerating layers of photoreceptors are provided utilizing a photogenerating component/resin dispersion formed in a low boiling point solvent.Type: GrantFiled: May 12, 2005Date of Patent: December 9, 2008Assignee: Xerox CorporationInventors: Cindy C. Chen, Lanhui Zhang, Nancy Lynn Belknap, Ed J. Radigan
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Publication number: 20080292982Abstract: A photoconductor comprising an optional supporting substrate, a fluorogallium phthalocyanine containing photogenerating layer, and at least one charge transport layer.Type: ApplicationFiled: May 24, 2007Publication date: November 27, 2008Inventors: Daniel V. Levy, Liang-Bih Lin, Jin Wu
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Patent number: 7452643Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and n is a number of from about 1 to about 10; and wherein a thiophosphate is contained in the photogenerating layer.Type: GrantFiled: June 15, 2006Date of Patent: November 18, 2008Assignee: Xerox CorporationInventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Michael S. Roetker, Kent J. Evans, Geoffrey M T. Foley, Anthony M. Horgan, Yonn K. Rasmussen, Satchidanand Mishra, Edward F. Grabowski, Liang-Bih Lin, Markus R. Silvestri
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Patent number: 7449270Abstract: A two-layered electrophotographic photoreceptor is formed. The two-layered electrophotographic photoreceptor includes an electrically conductive substrate and a charge generating layer and a charge transporting layer form on the electrically conductive substrate, wherein the charge generating layer is a naphthalenetetracarboxylic acid diimide derivative represented by: The two-layered electrophotographic photoreceptor has high photosensitivity and low residual potential.Type: GrantFiled: June 12, 2006Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Beom-jun Kim, Seung-ju Kim, Saburo Yokota, Kyung-yol Yon, Moto Makino, Hwan-koo Lee, Ji-uk Kim, Ji-Young Lee
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Publication number: 20080274419Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the photogenerating layer contains a photogenerating pigment or pigments, and a bis(pyridyl)alkylene.Type: ApplicationFiled: May 4, 2007Publication date: November 6, 2008Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Sherri A. Colon
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Publication number: 20080274418Abstract: A photoconductor containing a supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, and wherein the charge transport layer contains a charge blocking agent, such as a benzoimidazole.Type: ApplicationFiled: May 4, 2007Publication date: November 6, 2008Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Marc J. Livecchi
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Patent number: 7445876Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer of at least one charge transport component, at least one C-ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and the sum of n plus m (n+m) is from about 1 to about 10, and an optional antioxidant; and wherein a thiophosphate is contained in the photogenerating layer.Type: GrantFiled: June 15, 2006Date of Patent: November 4, 2008Assignee: Xerox CorporationInventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Michael S. Roetker, Kent J. Evans, Geoffrey M T. Foley, Anthony M. Horgan, Yonn K. Rasmussen, Satchidanand Mishra, Edward F. Grabowski, Liang-Bih Lin, Markus R. Silvestri
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Patent number: 7442479Abstract: A photoreceptor including at least an electroconductive substrate, and a charge blocking layer, a moiré preventing layer, and a photosensitive layer, which are located overlying the electroconductive substrate in this order, wherein the photosensitive layer includes an azo pigment having a fluorenone skeleton. The photosensitive layer is preferably prepared by coating a coating liquid including a dispersion which is prepared by dispersing the azo pigment in a solvent to an extent such that the average particle diameter of the azo pigment is not greater than 0.3 ?m and the standard deviation of the particle diameter is not greater than 0.2 ?m, followed by filtering with a filter having an effective pore diameter not greater than 5 ?m. An image forming apparatus and a process cartridge including the photoreceptor.Type: GrantFiled: June 27, 2005Date of Patent: October 28, 2008Assignee: Ricoh Company, LimitedInventor: Tatsuya Niimi
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Publication number: 20080241721Abstract: A photoconductor containing a first layer, a supporting substrate thereover, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the first layer is in contact with the supporting substrate on the reverse side thereof, and which layer contains a semi-penetrating polymer network formed from crosslinking a suitable fluoropolymer, and within which network structure is penetrated with a polycarbonate.Type: ApplicationFiled: March 29, 2007Publication date: October 2, 2008Inventors: Huoy-Jen Yuh, Robert C U Yu, Yuhua Tong, David M. Skinner
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Publication number: 20080220351Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent of, for example, a ?-diketone, a ketoester, a hydroxyl carboxylic acid, a hydroxyl carboxylic acid ester, a keto alcohol, or an amino alcohol.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Inventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
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Publication number: 20080220352Abstract: A photoconductor containing a supporting substrate, a photogenerating layer; and at least one charge transport layer where the photogenerating layer contains a photogenerating pigment and a chelating additive or agent.Type: ApplicationFiled: March 6, 2007Publication date: September 11, 2008Inventors: Jin Wu, Kent J. Evans, Dennis J. Prosser, Liang-Bih Lin, Raymond K. Crandall
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Patent number: 7419752Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to a photoreceptor additive to improve impermeability to gases and moisture so as to minimize environment variation of photoreceptor performance.Type: GrantFiled: October 24, 2005Date of Patent: September 2, 2008Assignee: Xerox CorporationInventors: Jin Wu, Linda L. Ferrarese, James R. Beckus, Liang-bih Lin
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Patent number: 7419750Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to the incorporation of esters of phosphoric acid in the anticurl back coating to reduce or eliminate static charge buildup in the imaging member and to improve image quality.Type: GrantFiled: July 24, 2006Date of Patent: September 2, 2008Assignee: Xerox CorporationInventors: Jin Wu, Kathleen M. Carmichael, Edward F. Grabowski, Liang-bih Lin
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Patent number: 7413836Abstract: An electrophotographic photoreceptor including: an electrically conductive substrate; a charge generating layer disposed on the electrically conductive substrate and includes a charge generating material dispersed or dissolved in a binder resin and an asymmetric naphthalenetetracarboxylic acid diimide derivative having a nitro group dispersed or dissolved in the binder resin. The photoreceptor also has a charge transporting layer that is disposed on the charge generating layer and includes a charge transporting material that is dispersed or dissolved in the binder resin. An electrophotographic image forming apparatus including the electrophotographic photoreceptor. The two-layered type electrophotographic photoreceptor has good interlayer adhesive force and good electrical properties such as good photosensitivity and low residual potential after exposure.Type: GrantFiled: September 7, 2006Date of Patent: August 19, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Seung-ju Kim, Beom-jun Kim, Saburo Yokota, Kyung-yol Yon, Moto Makino, Hwan-koo Lee, Ji-young Lee
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Publication number: 20080176154Abstract: In the aim of providing a photoreceptor which is highly sensitive, highly abrasion-resistant, and reduced in cost, a production method for the photoreceptor, and an electrophotographic apparatus using the photoreceptor, the photoreceptor has a structure wherein an organic film (or an amorphous silicon film) used as a charge generation layer 2 and formed on an electroconductive support 1 and an inorganic metal oxide having optical transparency and used as a charge transport layer 3 are stacked. Further, a buffer layer 4 is formed between the charge generation layer 2 and the charge transport layer 3 when so required. Also, the metal oxide used as the charge transport layer 3 and having optical transparency is formed by employing an aerosol deposition method.Type: ApplicationFiled: December 10, 2007Publication date: July 24, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Akira GYOUTOKU
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Patent number: 7396622Abstract: An electrophotographic photosensitive member having a support and a charge generation layer containing a charge-generating material and a binder resin, provided on the support, and a hole transport layer containing a hole-transporting material, provided on the charge generation layer. The charge generation lays contains a phenanthroline compound according to formula (3) discussed in the specification or an acenaphthene compound according to formula (4) discussed in the specification. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member.Type: GrantFiled: June 23, 2005Date of Patent: July 8, 2008Assignee: Canon Kabushiki KaishaInventors: Hideaki Nagasaka, Kunihiko Sekido, Michiyo Sekiya, Nobumichi Miki, Yosuke Morikawa
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Patent number: 7390601Abstract: A photoconductive imaging member is provided comprising a substrate, an optional hole blocking layer, a charge generation layer, and a charge transport layer. The charge generation layer includes a charge generating material and a binder, wherein the binder comprises an electron transport material chemically attached to a polymeric binder material.Type: GrantFiled: June 16, 2005Date of Patent: June 24, 2008Assignee: Xerox CorporationInventors: Jin Wu, Yuhua Tong, Linda L. Ferrarese, John J. Wilbert, Edward C. Savage, Liang-Bih Lin
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Patent number: 7384716Abstract: A coating composition for an electrophotographic photoreceptor that forms a charge-generating layer by being ejected from ejection nozzles in a form of droplets, comprises a charge-generating substance, a binding resin, and a solvent, has a viscosity of 1 mPa·s to 10 mPa·s, and the solvent contains at least one kind of high-boiling point solvent having a boiling point of 120° C. to 260° C., and the high-boiling point solvent is contained at a ratio of 5 parts by weight to 40 parts by weight with respect to 100 parts by weight of the coating composition for an electrophotographic photoreceptor.Type: GrantFiled: March 2, 2005Date of Patent: June 10, 2008Assignee: Sharp Kabushiki KaishaInventor: Masanori Kinomoto