| Autor/in / Beteiligte Person: |
Fujiwara, Yukio ; Kami, Hidetoshi ; Egawa, Kazuhiro ; Nohsho, Shinji ; Yoshihara, Mayumi ; Matsumoto, Mihoko ; Yamamoto, Kohsuke |
| Sonstiges: |
- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 8,293,439
- Publication Date: October 23, 2012
- Appl. No: 12/723058
- Application Filed: March 12, 2010
- Assignees: Ricoh Company, Ltd. (Tokyo, JP)
- Claim:
- Claim: 2. The electrophotographic photoreceptor according to claim 1 , wherein the cross-linked resin surface layer comprises a cross-linked body of a cross-linkable charge transport material having a triarylamine structure.
- Claim: 3. The electrophotographic photoreceptor according to claim 1 , wherein the cross-linked resin surface layer comprises a cross-linked body of a cross-linkable charge transport material having the following formula (A) in an amount of 5% by weight or more and 60% by weight or less: [chemical expression included] wherein each of d, e, and f independently represents an integer of 0 or 1; each of g and h independently represents an integer of from 0 to 3; R 13 represents a hydrogen atom or a methyl group; each of R 14 and R 15 independently represents an alkyl group having 1 to 6 carbon atoms, wherein multiple R 14 and R 15 may be, but need not necessarily be, the same; and Z represents a single bond, a methylene group, an ethylene group, —CH 2 CH 2 O—, [chemical expression included]
- Claim: 4. The electrophotographic photoreceptor according to claim 1 , wherein the cross-linked resin surface layer comprises a cross-linked body of a trimethylolpropane triacrylate in an amount of 10% by weight or more and 50% by weight or less.
- Claim: 5. The electrophotographic photoreceptor according to claim 1 , wherein the cross-linked resin surface layer coating liquid comprises the cross-linkable silicone material in an amount of from 1 to 5% by weight and the non-cross-linkable silicone material in an amount of from 1 to 5% by weight based on solid contents.
- Claim: 6. The electrophotographic photoreceptor according to claim 1 , wherein the surface layer is a thermoplastic resin surface layer.
- Claim: 7. The electrophotographic photoreceptor according to claim 6 , wherein the thermoplastic resin surface layer is formed by coating and curing a thermoplastic resin surface layer coating liquid on the photosensitive layer, the thermoplastic resin surface layer coating liquid comprising a charge transport material, a thermoplastic resin, a cross-linkable silicone material, and a non-cross-linkable silicone material.
- Claim: 8. The electrophotographic photoreceptor according to claim 7 , wherein the thermoplastic resin surface layer coating liquid comprises the cross-linkable silicone material in an amount of from 1 to 5% by weight and the non-cross-linkable silicone material in an amount of from 1 to 5% by weight based on solid contents.
- Claim: 9. An image forming apparatus, comprising: the electrophotographic photoreceptor according to claim 1 configured to bear an electrostatic latent image; a brush roller configured to apply a solid lubricant to a surface of the electrophotographic photoreceptor; a blade configured to extend the solid lubricant on the surface of the electrophotographic photoreceptor; and a developing device configured to develop the electrostatic latent image with a toner to form a toner image.
- Claim: 10. The image forming apparatus according to claim 9 , wherein the toner is a polymerization toner.
- Claim: 11. The image forming apparatus according to claim 9 , wherein the developing device is a tandem developing device which includes 2 or more developing stations each configured to form different-color toner images with different-color polymerization toners.
- Claim: 12. A process cartridge detachably mountable on image forming apparatus, comprising: the electrophotographic photoreceptor according to claim 1 configured to bear an electrostatic latent image; a brush roller configured to apply a solid lubricant to a surface of the electrophotographic photoreceptor; and a blade configured to extend the solid lubricant on the surface of the electrophotographic photoreceptor.
- Current U.S. Class: 430/66
- Patent References Cited: 6861188 March 2005 Ikegami et al. ; 6936388 August 2005 Suzuki et al. ; 7018755 March 2006 Ikegami et al. ; 7160658 January 2007 Suzuki et al. ; 7177570 February 2007 Nagame et al. ; 7267916 September 2007 Sugino et al. ; 7314693 January 2008 Ikegami et al. ; 7381511 June 2008 Ikegami et al. ; 2007/0031746 February 2007 Toshine et al. ; 2007/0196749 August 2007 Inaba et al. ; 2007/0196750 August 2007 Fujiwara et al. ; 2007/0212626 September 2007 Toshine et al. ; 2008/0085459 April 2008 Kami et al. ; 2008/0138725 June 2008 Fujiwara et al. ; 2008/0153021 June 2008 Ikuno et al. ; 2008/0199217 August 2008 Iwamoto et al. ; 2008/0227008 September 2008 Kami et al. ; 2008/0311499 December 2008 Kami et al. ; 2009/0067891 March 2009 Kami et al. ; 2009/0148180 June 2009 Fujiwara et al. ; 2009/0208246 August 2009 Kami ; 57-78402 May 1982 ; 5-88392 April 1993 ; 7-104497 April 1995 ; 7-292095 November 1995 ; 2509292 April 1996 ; 8-248663 September 1996 ; 3040540 March 2000 ; 2000-162881 June 2000 ; 2000-171990 June 2000 ; 2001-265014 September 2001 ; 2001-289630 October 2001 ; 2001-343771 December 2001 ; 2002-82468 March 2002 ; 2002-196645 July 2002 ; 2002-251029 September 2002 ; 2002-296994 October 2002 ; 2002-311613 October 2002 ; 2002-341572 November 2002 ; 2003-131537 May 2003 ; 2003-241408 August 2003 ; 2003-270840 September 2003 ; 2004-54001 February 2004 ; 2004-61359 February 2004 ; 2004-258588 September 2004 ; 2006-53576 February 2006 ; 2006-53577 February 2006 ; 2006-79102 March 2006 ; 3782680 March 2006 ; 3789081 April 2006 ; 2006-163302 June 2006 ; 2006-308743 November 2006 ; 3878425 November 2006 ; 3878427 November 2006 ; 3878428 November 2006 ; 2007-79230 March 2007 ; 2007-79244 March 2007 ; 2007-86319 April 2007 ; 3943476 April 2007 ; 3938209 June 2007 ; 3938210 June 2007 ; 4003914 August 2007 ; 4011790 September 2007 ; 2007-292772 November 2007 ; 2008-70540 March 2008 ; 4110116 April 2008 ; 2008-122869 May 2008 ; 4136567 June 2008 ; 4194973 October 2008 ; 4400704 November 2009
- Other References: “Blade cleaning system for polymerized and small size toner”, Hyakutake et al., Japan Hardcopy Fall Meeting, 2001, pp. 24-27. cited by other ; “Measuring Non-Electrostatic Adhesive Force between Solid Surfaces and Particles by Means of Atomic Force Microscopy”, Mizuguchi et al., Konica Minolta Technology Report vol. 1 (2004) pp. 19-22. cited by other
- Primary Examiner: Vajda, Peter
- Attorney, Agent or Firm: Cooper & Dunham LLP
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