Patents by Inventor Shoji Takeya
Shoji Takeya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7970311Abstract: According to an aspect of the present invention, there is provided a developing device including: a roller that develops an electric latent image formed on an image holding body; a chamber that stores a toner; a case that houses the roller and the chamber; a concave portion that is inwardly concaved from the case and that includes: a sidewall, a bottom, and a filling port formed in the bottom; and a first lid that closes the filling port.Type: GrantFiled: December 10, 2007Date of Patent: June 28, 2011Assignee: Ricoh Company, Ltd.Inventors: Kenji Nakamura, Yuichiro Suzuki, Katsumi Kumada, Shoji Takeya, Chikara Hiraoka
-
Publication number: 20080145094Abstract: According to an aspect of the present invention, there is provided a developing device including: a roller that develops an electric latent image formed on an image holding body; a chamber that stores a toner; a case that houses the roller and the chamber; a concave portion that is inwardly concaved from the case and that includes: a sidewall, a bottom, and a filling port formed in the bottom; and a first lid that closes the filling port.Type: ApplicationFiled: December 10, 2007Publication date: June 19, 2008Applicant: RICOH PRINTING SYSTEMS, LTD.Inventors: Kenji Nakamura, Yuichiro Suzuki, Katsumi Kumada, Shoji Takeya, Chikara Hiraoka
-
Patent number: 6701115Abstract: A color electrophotographic apparatus includes a photosensitive member, an exposing device for forming an image on the photosensitive member, developing devices for different colors, and a transfer member. The developing devices include a toner storing chamber, a toner carrying member for forming a toner layer, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner supply chamber having a supply member therein, a toner recovery chamber having an rotating member therein, and a separating member for separating the toner supply chamber from the toner recovery chamber so that the toner supply chamber is disposable above the toner recovery chamber.Type: GrantFiled: January 31, 2003Date of Patent: March 2, 2004Assignee: Hitachi, Ltd.Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Publication number: 20030113140Abstract: A color electrophotographic apparatus includes a photosensitive member, an exposing device for forming an image on the photosensitive member, developing devices for different colors, and a transfer member. The developing devices include a toner storing chamber, a toner carrying member for forming a toner layer, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner supply chamber having a supply member therein, a toner recovery chamber having an rotating member therein, and a separating member for separating the toner supply chamber from the toner recovery chamber so that the toner supply chamber is disposable above the toner recovery chamber.Type: ApplicationFiled: January 31, 2003Publication date: June 19, 2003Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Patent number: 6516171Abstract: A color electrophotographic apparatus having a photosensitive member, an exposing device for forming an electrostatic latent image on the photosensitive member, four developing devices which attach toner on the photosensitive member and form a toner image and a transfer member for transferring the toner image onto a printing medium. The four developing devices include respectively a developing device for a yellow image, a magenta image, cyan image, and a black image. Each developing device includes a toner storing chamber for storing toner of a nonmagnetic one-component developer, a toner carrying member for forming a toner layer of the toner, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner recovery chamber having an agitating member for agitating recovered toner, and a separating member for separating a toner supply chamber for the toner carrying member from the toner recovery chamber.Type: GrantFiled: November 14, 2001Date of Patent: February 4, 2003Assignee: Hitachi, Ltd.Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Publication number: 20020028095Abstract: A color electrophotographic apparatus having a photosensitive member, an exposing device for forming an electrostatic latent image on the photosensitive member, four developing devices which attach toner on the photosensitive member and form a toner image and a transfer member for transferring the toner image onto a printing medium. The four developing devices include respectively a developing device for a yellow image, a magenta image, cyan image, and a black image. Each developing device includes a toner storing chamber for storing toner of a nonmagnetic one-component developer, a toner carrying member for forming a toner layer of the toner, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner recovery chamber having an agitating member for agitating recovered toner, and a separating member for separating a toner supply chamber for the toner carrying member from the toner recovery chamber.Type: ApplicationFiled: November 14, 2001Publication date: March 7, 2002Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Patent number: 6321058Abstract: A developing device for an electrophotographic apparatus. The developing device includes a toner storing chamber for storing toner of a developer, a toner carrying member for forming a toner layer of the toner, and a regulating member for regulating an amount of toner attached to the toner carrying member, the insulating member being disposed to below the toner carrying member. A toner supply chamber is provided for supplying toner to the toner carrying member and a toner recovery chamber is provided for recovering a surplus of toner regulated by the regulating member. A separating member is provided for separating the toner supply chamber and the toner recovery chamber.Type: GrantFiled: September 12, 2000Date of Patent: November 20, 2001Assignee: Hitachi, Ltd.Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Patent number: 6144829Abstract: A developing device capable of high quality image recording by separating a toner supply chamber for supplying toner to a developing roll and a toner recovery chamber for recovering regulated toner by a regulating blade from each other by a sheet-shaped member thereby stabilizing the toner supply to the developing roll and the toner recovery.Type: GrantFiled: May 3, 1999Date of Patent: November 7, 2000Assignee: Hitachi, Ltd.Inventors: Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
-
Patent number: 6038416Abstract: A toner bearing body unit is constituted as one assembled unit including a toner bearing body for holding toners supplied from a toner supply roller of a housing main body at an outer peripheral surface thereof, a toner layer thickness regulating member for electrically charging the toners by applying pressure toward the outer peripheral surface of the toner bearing body and for forming a toner thin layer on the toner bearing body, and a holding member for holding the toner bearing body and the toner layer thickness regulating member. The toner bearing body unit is constituted to be directly attachable to and detachable from an outer side of the housing main body of a developing apparatus. Accordingly, an uniform toner thin layer having a predetermined thickness can be formed stably on the toner bearing body during a long period of use, and the developing apparatus reconstructed so that replacement of the components thereof can be carried out easily.Type: GrantFiled: August 3, 1998Date of Patent: March 14, 2000Assignee: Hitachi, Ltd.Inventors: Tadashi Okano, Masahiko Saito, Isamu Terashima, Shoji Takeya, Toru Miyasaka, Kazushige Oonishi
-
Patent number: 5797075Abstract: A developing apparatus includes toner powder in the form of fine colored powder, a toner carrier, and a frictional controlling member for contacting under a pressure with the toner carrier under pressure to frictionally charge the toner powder and form a thin toner layer on the toner carrier. The toner carrier on which the thin toner layer is formed is rotated so as to transport the thin toner layer to an opposing location on a toner image carrier on which an electrostatic latent image is formed to convert the electrostatic latent image into a visible image. The developing apparatus includes a toner supply roller disposed in rotating contact with the toner carrier at a side of the toner carrier, the frictional controlling member being provided at a position in contact with the toner carrier downstream of the toner supply roller; and a rotatable toner scraping member is provided in a neighboring relationship below the toner supply roller and the frictional controlling member.Type: GrantFiled: March 11, 1997Date of Patent: August 18, 1998Assignee: Hitachi, Ltd.Inventors: Masahiko Saito, Toru Miyasaka, Kazushige Oonishi, Shoji Takeya, Isamu Terashima, Tetsuro Akasaki, Tadashi Okano