Ricoh Company, Ltd.

Takashi Rokutanzono

Narihito Kojima

Hiroshi Nagame

Shinji Nousho

Tatsuya Niimi

Eiji Kurimoto

Yukio Ide

Takaaki Ikegami

Mitsuru Seto

Masaomi Sasaki

Yasuo Suzuki

Tamotsu Aruga

Naohiro Toda

Masayuki Koyano

Yoshiaki Kawasaki

Katsuichi Ohta

Kohichi Ohshima

Kaoru Tadokoro

Megumi Kawahara

Junichiro Hashimoto

Kouichi Ohshima

Shinji Nousyo

Shinji Nosho

A server computer searches for at least one printing-service providing store based on printing-condition information sent form an information terminal, and sends information representing the searched printing-service providing store to the information terminal. After a user selects one printer device based on the information representing the at least one printing-service providing store, the information terminal sends document data to be printed to the server computer. The server computer sends printing data to be printed to the user-selected printer device.

Server computer, information terminal, printing system, remote printing method, recording medium, and computer data signal embeded in a carrier wave

A photoreceptor including an electroconductive substrate and a photosensitive layer which is formed on the electroconductive substrate and which includes a charge generation material, wherein the charge generation material comprises an organic pigment and wherein the photosensitive layer further includes at least one ion selected from the group consisting of K , Na , NO , HCOO , NO , Cl , Br , and NH or one or more water-soluble inorganic salts.

Electrophotographic photoreceptor, electrophotographic image forming method and apparatus using the photoreceptor

An electrophotographic image forming process includes the steps of charging, light exposure, reversal development, and image transfer, using a photoconductor having an electroconductive support, and a photo-conductive layer formed thereon, with a residual solvent being contained in the photoconductor, and the electrophotographic photoconductor showing a residual potential change ratio of 200% or less, a sensitivity change ratio of 30% or less, and an electrostatic capacity change ratio of 30% or less. The photoconductor for use with the above-mentioned image forming process is also disclosed.

Electrophotographic image forming process and electrophotographic photoconductor

An electrophotographic photoconductor has an electroconductive support, and a single-layered photoconductive layer formed thereon containing a charge generation material, a charge transport material, a binder resin and a mixture of a phenol compound and an organic sulfur-containing compound.

Electrophotographic photoconductor containing a mixture of a phenol

An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and a simultaneously pulverized mixture including at least one disazo pigment of formula (1) and at least one trisazo pigment of formula (2), which is obtained by simultaneously pulverizing those azo pigments: ##STR1## wherein R.sup.1 and R.sup.2 each is hydrogen, a halogen atom, trifluoromethyl group, nitro group or cyano group; R.sup.3 is hydrogen, chlorine, fluorine, iodine, bromine, nitro group or cyano group; and Ar.sup.1, Ar.sup.2 and Ar.sup.3 each is a coupler radical, which may be the same or different.

Electrophotographic photoconductor containing disazo and trisazo pigments

An electrophotographic photoconductor is composed of an electroconductive support, a photoconductive layer formed on the electroconductive support, and a protective layer formed on the photoconductive layer which is composed of a polyol curing-type urethane resin, and satisfies the condition of b/a.ltoreq.0.2, wherein a is the absorbance at 2920 cm.sup.- and b is the absorbance at 2260 cm.sup.-1 in an IR spectrum of the protective layer.

Electrophotographic photoconductor with overlayer of polyol-curing

An electrophotographic photoconductor comprises (a) an electroconductive support, (b) a photoconductive layer formed thereon comprising a selenium alloy, and (c) a protective layer which is formed on the photoconductive layer, contains a binder resin component and an anti-oxidizing agent. In an electrophotographic copying process and an electrophographic copying apparatus using this photoconductor, the protective layer is abraded at a predetermined rate during the copying process in such a fashion that the anti-oxidizing agent contained in the protective layer is always present at the surface of the protective layer, thereby protecting the photoconductor from ozone and ions which are generated during corona charging of the photoconductor.

Electrophotographic photoconductor and electrophotographic copying

An electrophotographic photoconductor is disclosed, which comprises an electroconductive substrate, a photoconductive layer formed on the electroconductive substrate, and a protective layer formed on the photoconductive layer, the protective layer comprising a binder resin and finely-divided particles of at least one metal oxide with the surface thereof being coated with a coupling agent selected from the group consisting of a titanate-type coupling agent, a fluorine-containing silane coupling agent, and an acetoalkoxyaluminum diisopropylate, dispersed in the binder resin.

Electrophotographic photoconductor

An electrophotographic photoconductor is disclosed, which comprises an electroconductive layer, on which are formed in order, a photoconductive layer, a charge retention layer and a protective layer, optionally an adhesive layer between the charge retention layer and the protective layer, the charge retention layer comprising a silicone resin which comprises: (a) 50 wt. % to 80 wt. % of silicone and oxygen, (b) 10 wt. % to 30 wt. % of carbon, (c) 1 wt. % to 10 wt. % of hydrogen, and (d) 1 wt. % to 10 wt. % of nitrogen. The photoconductive layer may comprise an As-Se alloy, in which case, it is preferable that the amount of As be in the range of 33 wt. % to 38 wt. % and the balance thereof be Se in the As-Se alloy. Preferably the adhesive layer comprises a hardened material containing a metal alkoxide.

Growing community of inventors

Numazu, Japan

Takashi Rokutanzono