1
Hiroshi Ikuno, Hiroshi Nagame, Tetsuro Suzuki, Hidetoshi Kami, Jun Aoto, Hiroshi Tamura, Narihito Kojima, Tatsuya Niimi: Electrophotographic photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, February 16, 1999: US05871876 (66 worldwide citation)

An electrophotographic photoconductor has an electroconductive support and a photoconductive layer formed thereon, which contains a charge transport material with a polycarbonate structure having a triarylamino group at least on the main chain or side chain thereof, and a charge generation material ...


2
Yasuo Suzuki, Jun Aoto, Takehiko Kinoshita: Electrophotographic photoconductor and electrophotographic image forming apparatus using the photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, October 24, 2000: US06136483 (28 worldwide citation)

An electrophotographic photoconductor including an electroconductive substrate, and a charge generating layer including a charge generating material and a charge transporting layer including a charge transporting material, which are overlaid and which are formed overlying one side of the electrocond ...


3
Mitsuru Seto, Shigeru Fukuda, Yasuo Hirano, Jun Aoto, Masahide Yamashita, Takashi Bisaiji, Makoto Ohsaki, Takeshi Shintani: Image forming apparatus. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, June 2, 1998: US05761594 (28 worldwide citation)

In an image forming apparatus of the type transferring a plurality of toner images of different colors sequentially formed on an image carrier sequentially to an endless intermediate transfer body one above the other by primary transfer, and then transferring the resulting composite color image to a ...


4
Jun Aoto, Yasuo Hirano: Unit for developing electrostatic latent images including member having overcoat layer. Ricoh Company, Cooper & Dunham, December 1, 1992: US05168312 (24 worldwide citation)

A development unit including (i) a latent-electrostatic-image-bearable member, (ii) a development member for supporting a toner thereon and developing latent electrostatic images formed on the latent-electrostatic-image-bearable member into visible toner images with the toner, and (iii) a toner laye ...


5
Yasuo Hirano, Jun Aoto, Kazuo Nojima, Koji Suzuki, Hiroshi Takashima, Shigekazu Enoki, Yuichi Ueno, Naoki Iwata: Method of developing latent electrostatic images and developer-bearing member. Ricoh Company, Cooper & Dunham, April 21, 1998: US05741616 (19 worldwide citation)

A method of developing latent electrostatic images and a developer-bearing member for use in the method are disclosed, which method includes the steps of (a) forming numerous micro closed electric fields near the surface of a rotatable developer-bearing member which comprises an electroconductive su ...


6
Jun Aoto, Yasuo Hirano, Masahide Yamashita, Mitsuru Seto, Shigeru Fukuda: Image forming apparatus having an intermediate transfer unit with a surface having reduced coefficient of friction. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, February 16, 1999: US05873018 (15 worldwide citation)

An image forming apparatus comprises an intermediate transfer unit associated with a photoconductive medium. A first unit transfers a developed image on the photoconductive medium to the intermediate transfer unit such that an intermediate image on the intermediate transfer unit is formed. A second ...


7
Masahide Yamashita, Yasuo Hirano, Jun Aoto, Mitsuru Seto, Shigeru Fukuda: Intermediate transfer type image forming apparatus and an intermediate transfer medium therefor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, August 5, 1997: US05655199 (13 worldwide citation)

An intermediate transfer type image forming apparatus for sequentially performing primary and secondary image transfer with the intermediary of an intermediate transfer medium implemented as, e.g., a belt, and the intermediate transfer member are disclosed. The image transfer medium has a lower surf ...


8
Yasuo Hirano, Jun Aoto: Development unit having a toner layer thickness regulation member. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt, August 25, 1992: US05142330 (13 worldwide citation)

A development unit comprising a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component type toner thereto, and a toner layer thickness regulation member for forming a toner layer ...


9
Yasuo Hirano, Jun Aoto: Development roller with surface layer of fluorosilicon polymer. Ricoh Company, Cooper & Dunham, March 24, 1992: US05099285 (12 worldwide citation)

A development apparatus including a development roller for developing a latent electrostatic image formed on an electrophotographic photoconductor to a visible toner image by applying a non-magnetic one-component toner thereto, in which a surface layer of the development roller includes a fluorosilc ...


10
Jun Aoto, Yasuo Hirano, Masahide Yamashita, Mitsuru Seto, Shigeru Fukuda: Electrophotograhic image forming method using an intermediate image transfer element. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, June 30, 1998: US05774775 (10 worldwide citation)

An image forming method wherein a toner image on an image carrier is transferred in a first transfer step to an intermediate image transfer element, the transferred toner image on said intermediate image transfer element being subsequently transferred in a second transfer step to a transfer medium. ...