Patent•
Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus
01 Jun 2006-
TL;DR: An electrophotographic photosensitive member capable of persistently exerting an effect of mitigating contact stress with contact members and excellent also in potential stability during repeated use is provided in this article.
Abstract: An electrophotographic photosensitive member capable of persistently exerting an effect of mitigating contact stress with contact members and excellent also in potential stability during repeated use is provided, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member are provided. The charge transport layer serving as a surface layer of the electrophotographic photosensitive member contains a charge transporting material, polyester resin A containing a siloxane moiety and at least one of polyester resin C and polycarbonate resin D. The content of a siloxane moiety in polyester resin A is not less than 10% by mass and not more than 40% by mass relative to the total mass of polyester resin A. The charge transport layer has a matrix-domain structure having a matrix formed of the charge transporting material and at least one of polyester resin C and polycarbonate resin D and a domain formed of polyester resin A in the matrix.
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28 Jun 2013TL;DR: An electrophotographic photosensitive member that can not easily cause charging lines was revealed in this paper, where a process cartridge and an electrophotonographic apparatus with such a member were shown.
Abstract: An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.
437 citations
Patent•
20 Oct 2010TL;DR: In this paper, an electronic device comprising anode, cathode, and at least one organic layer which comprises a compound of the formula (I to (IV) is described.
Abstract: The present invention relates to an electronic device comprising anode, cathode and at least one organic layer which comprises a compound of the formula (I) to (IV). The invention furthermore encompasses the use of compounds of the formula (I) to (IV) in an electronic device and to a compound of the formula (Ic) to (IVc).
432 citations
Patent•
20 Jan 2000TL;DR: In this article, a toner suitable for use in an image forming method including a contact charging step is provided, which includes: toner particles comprising at least a binder resin and a colorant, and fine particles.
Abstract: A toner suitable for use in an image forming method including a contact charging step is provided. The toner includes: toner particles comprising at least a binder resin and a colorant, and fine particles. The fine particles comprise: (i) a tungsten-containing tin oxide, or (ii) base particles, and a tungsten-containing tin compound coating the base particles, the fine particles contain tin (Sn) in a weight ratio (Sn/b) of 0.01 to 2.0 with respect to the base particles (B). In the fine particles, tungsten (W) is contained in a mol ratio (W/Sn) of 0.001 to 0.3 with respect to the tin (Sn).
278 citations
Patent•
24 Apr 2012TL;DR: In this article, the authors proposed a charging member comprising a support, a conductive elastic layer formed on the support, and a surface layer consisting of polysiloxane having a fluoroalkyl group and an oxyalkylene group.
Abstract: An object of the present invention is to provide a charging member in which a toner, an additive for use in the toner, or the like is hard to adhere to the surface even under repeated use for a long time, and hence the charging and image output are made stable for a long time even if the charging member is used in the DC contact charging method, and a process cartridge and an electrophotographic apparatus having the charging member. The present invention provides a charging member comprising a support, a conductive elastic layer formed on the support, and a surface layer formed on the conductive elastic layer, characterized in that the surface layer contains a polysiloxane having a fluoroalkyl group and an oxyalkylene group, and a process cartridge and an electrophotographic apparatus having the charging member.
175 citations
Patent•
04 Mar 2009TL;DR: In this paper, a demanded printing job is accepted at a printing job accepting unit, and a printing executing unit executes printing according to the accepted printing job so as to produce an output sheet onto a discharge tray, warning information is produced by a warning voice producing unit.
Abstract: The present invention is characterized in that: a demanded printing-job is accepted at a printing-job accepting unit, and a printing executing unit executes printing according to the accepted printing-job so as to produce an output sheet onto a discharge tray; an output-sheet detecting unit detects the presence of a printed output-sheet on the discharge tray; if the removal of discharged sheets from the discharge tray is detected, a printed-sheet mixture determining unit determines the possibility that sheets printed corresponding to a plurality of demands are mixed among the removed output-sheets; and if it is determined the possibility that sheets printed corresponding to a plurality of the demands are mixed among the output-sheets, warning information is produced by a warning voice producing unit.
169 citations
References
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Patent•
30 Oct 1987
TL;DR: In this article, a single layer type photosensitive body was obtained by combining a specified perylene derivative, a diamine derivative, and a binder resin resin to obtain high sensitivity and high positive chargeability.
Abstract: PURPOSE:To obtain a single layer type photosensitive body superior in positive chargeability, high in sensitivity and small in residual potential by forming a photosensitive layer composed of a specified perylene derivative, a diamine derivative, and a binder resin. CONSTITUTION:The single layer type photosensitive layer comprises as an electric charge generating material, the perylene derivative represented by formula I, each of R -R being lower alkyl, as a charge transfer material, the diamine derivative represented by formula II, each of R -R being H, lower alkyl, or the like; Y being H, lower alkoxy, or the like; and n being an integer of 1-3, and the binder resin, thus permitting the obtained single layer type photosensitive body to be superior in positive chargeability, high in sensitivity, and small in residual potential.
581 citations
Patent•
28 Jun 2013TL;DR: An electrophotographic photosensitive member that can not easily cause charging lines was revealed in this paper, where a process cartridge and an electrophotonographic apparatus with such a member were shown.
Abstract: An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.
437 citations
Patent•
19 Feb 2003TL;DR: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of polytetrafluoroethylene (PFLE) and metal oxide particles.
Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of a charge transport component or components, a polymer binder and metal oxide particles, wherein said metal oxide particles contain or are attached with or to a silane or a siloxane, or alternatively a polytetrafluoroethylene.
419 citations
Patent•
20 Jan 2000TL;DR: In this article, a toner suitable for use in an image forming method including a contact charging step is provided, which includes: toner particles comprising at least a binder resin and a colorant, and fine particles.
Abstract: A toner suitable for use in an image forming method including a contact charging step is provided. The toner includes: toner particles comprising at least a binder resin and a colorant, and fine particles. The fine particles comprise: (i) a tungsten-containing tin oxide, or (ii) base particles, and a tungsten-containing tin compound coating the base particles, the fine particles contain tin (Sn) in a weight ratio (Sn/b) of 0.01 to 2.0 with respect to the base particles (B). In the fine particles, tungsten (W) is contained in a mol ratio (W/Sn) of 0.001 to 0.3 with respect to the tin (Sn).
278 citations
Patent•
16 Jan 1990
TL;DR: In this paper, a photo-sensitive body is constituted by successively laminating a charge generating layer 2, the charge transfer layer 3 and the charge transferred layer 4 on a conductive base body and specifying the ionization potentials of the respective layers so as to satisfy the relation expressed by formula I.
Abstract: PURPOSE:To obtain the electrophotographic sensitive body which has a high sensitivity and good repetitive stability by forming a charge transfer layer of two layers which respectively contain different charge transfer materials and specifying the ionization potentials of the respective layers to satisfy a specific relation. CONSTITUTION:This photosensitive body is constituted by successively laminating a charge generating layer 2, the charge transfer layer 3 and the charge transfer layer 4 on a conductive base body 1 and specifying the ionization potentials of the respective layers so as to satisfy the relation expressed by formula I. In the formula, Ig(G) denotes the ionization potential of the charge generating layer 2; Ip(T1) denotes the ionization potential of the charge transfer layer 3 in contact with the charge generating layer 2; Ip(T2) denotes the ionization potential of the charge transfer layer 4 in contact with the charge transfer layer 3. The higher sensitivity and better repetitive stability than the sensitivity and repetitive stability of the separated function type electrophotographic sensitive body formed by using one layer of the charge transfer layer are obtd. by laminating two layers of these charge transfer layers in such a manner.
237 citations