Patents by Inventor Masako Yoshii

Masako Yoshii 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).

  • Publication number: 20220388724
    Abstract: Provided is a container including a container body, and an image on the container body. The image includes a plurality of dented portions and non-dented portions. Each of the dented portions is formed of a plurality of processed portions. The plurality of processed portions are disposed linearly, contacting or overlapping each other along a first scanning direction. A width of each of the dented portions in a second scanning direction orthogonal to the first scanning direction changes cyclically along the first scanning direction. Each of the dented portions has bossed portions along the first scanning direction between adjoining ones of the processed portions.
    Type: Application
    Filed: May 20, 2022
    Publication date: December 8, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Keiichi SERIZAWA, Kazuhiro FUJITA, Masako YOSHII, Makoto HINO, Kazuhiro AKATSU
  • Publication number: 20220388324
    Abstract: Provided is a container including a container body and an image on the container body. The image includes a plurality of dented portions and non-dented portions. A visibility value of the image represented by Mathematical formula (1) below is greater than or equal to a predetermined value. Visibility value=b0·L*0·(1?exp(b1·?L*))??Mathematical formula (1) In Mathematical formula (1), L*0 represents a luminosity of the image. ?L* represents a difference between the luminosity of the image and a luminosity of any other portion than the image, b0 represents a positive real number, and b1 represents a negative real number.
    Type: Application
    Filed: May 16, 2022
    Publication date: December 8, 2022
    Inventors: Masako YOSHII, Keiichi SERIZAWA, Makoto HINO, Kazuhiro AKATSU, Takeshi UEDA, Takayuki NAKAMURA, Yumiko KISHI
  • Patent number: 8699096
    Abstract: A deflector deflects a light beam from a light source. A scanning optical system focuses the light beam deflected by the deflector. An image carrying member is located at a focal position of the light beam and includes a surface that is scanned in a main scanning direction with the light beam focused by the scanning optical system. One pixel of an image is formed by a plurality of light spots having different focal positions in at least a sub-scanning direction. At least one light spot from among the light spots is formed on the surface of the image carrying member at a scan timing different from those of rest of the light spots.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: April 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuyuki Arai, Yoshinori Hayashi, Masako Yoshii
  • Patent number: 8275275
    Abstract: An image forming apparatus including a latent image carrier, a charger to evenly charge a surface of the latent image carrier, a writing device to irradiate a charged surface of the latent image carrier to form an electrostatic latent image, a writing device control unit to control the writing device, a developing device to develop the electrostatic latent image to form a toner image, a transfer device to transfer the toner image onto a transferred member, and a pre-transfer irradiating device to irradiate the charged surface of the latent image carrier during a period after development and before transfer. The writing device control unit controls the writing device based on a target image signal A and an image signal B output a single rotation of the latent image carrier after output of the target image signal A in a sub-scanning direction.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: September 25, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Emiko Ishikawa, Hiromi Ogiyama, Yasunobu Shimizu, Akio Kosuge, Ken Yoshida, Jun Yura, Naoyuki Ozaki, Masako Yoshii, Ichiro Maeda, Shinji Aoki
  • Patent number: 8115794
    Abstract: In an optical scanning device, when pixel density is taken to be n, number of the light beams is taken to be b, and number of the deflection surfaces of a deflecting unit is taken to be p, a spatial frequency S denoted by S=1/(1/(25.4/n×b×p) is within a range of a spatial frequency characteristic for a visual perception system of a high relative luminous efficiency. When spacing between ends in a sub-scanning direction of a scanning line formed by one scan by the deflection unit is taken to be L1, and spacing between all progressive scanning lines at the surface to be scanned is taken to be L2, then L1>(k?1)×L2 is satisfied, where k is a total number of light emitting points of a light source.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: February 14, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Masako Yoshii, Seizo Suzuki, Yoshinori Hayashi, Daisuke Ichii
  • Publication number: 20100098446
    Abstract: An image forming apparatus including a latent image carrier, a charger to evenly charge a surface of the latent image carrier, a writing device to irradiate a charged surface of the latent image carrier to form an electrostatic latent image, a writing device control unit to control the writing device, a developing device to develop the electrostatic latent image to form a toner image, a transfer device to transfer the toner image onto a transferred member, and a pre-transfer irradiating device to irradiate the charged surface of the latent image carrier during a period after development and before transfer. The writing device control unit controls the writing device based on a target image signal A and an image signal B output a single rotation of the latent image carrier after output of the target image signal A in a sub-scanning direction.
    Type: Application
    Filed: October 21, 2009
    Publication date: April 22, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Emiko Ishikawa, Hiromi Ogiyama, Yasunobu Shimizu, Akio Kosuge, Ken Yoshida, Jun Yura, Naoyuki Ozaki, Masako Yoshii, Ichiro Maeda, Shinji Aoki
  • Patent number: 7578896
    Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: August 25, 2009
    Assignee: TDK Corporation
    Inventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii
  • Publication number: 20090175657
    Abstract: In an optical scanning device, when pixel density is taken to be n, number of the light beams is taken to be b, and number of the deflection surfaces of a deflecting unit is taken to be p, a spatial frequency S denoted by S=1/(1/(25.4/n×b×p) is within a range of a spatial frequency characteristic for a visual perception system of a high relative luminous efficiency. When spacing between ends in a sub-scanning direction of a scanning line formed by one scan by the deflection unit is taken to be L1, and spacing between all progressive scanning lines at the surface to be scanned is taken to be L2, then L1>(k?1)×L2 is satisfied, where k is a total number of light emitting points of a light source.
    Type: Application
    Filed: January 2, 2009
    Publication date: July 9, 2009
    Inventors: Masako Yoshii, Seizo Suzuki, Yoshinori Hayashi, Daisuke Ichii
  • Publication number: 20090141316
    Abstract: A deflector deflects a light beam from a light source. A scanning optical system focuses the light beam deflected by the deflector. An image carrying member is located at a focal position of the light beam and includes a surface that is scanned in a main scanning direction with the light beam focused by the scanning optical system. One pixel of an image is formed by a plurality of light spots having different focal positions in at least a sub-scanning direction. At least one light spot from among the light spots is formed on the surface of the image carrying member at a scan timing different from those of rest of the light spots.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 4, 2009
    Inventors: Nobuyuki Arai, Yoshinori Hayashi, Masako Yoshii
  • Publication number: 20080006365
    Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.
    Type: Application
    Filed: August 29, 2007
    Publication date: January 10, 2008
    Applicant: TDK
    Inventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii
  • Patent number: 7276130
    Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: October 2, 2007
    Assignee: TDK Corporation
    Inventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii
  • Patent number: 6947682
    Abstract: An image forming apparatus of the present invention includes an image carrier on which a toner image is to be formed, and a sheet support member for conveying a sheet, carrying the toner image thereon, in cooperation with the image carrier. The image carrier and sheet support member are driven such that their surfaces move in the same direction, as seen at a contact position where the two surfaces face each other via the sheet. An electric field, forcing the toner image toward the image carrier, and an electric field, forcing it toward the sheet, are formed between the surface of the image carrier and that of the sheet at positions upstream and downstream, respectively, of the contact position in the direction of movement of the sheet.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: September 20, 2005
    Assignee: Ricoh Company Ltd.
    Inventors: Hideki Kosugi, Sadayuki Iwai, Tomoko Takahashi, Masako Yoshii, Ayako Iino
  • Publication number: 20040218940
    Abstract: An image forming apparatus of the present invention includes an image carrier on which a toner image is to be formed, and a sheet support member for conveying a sheet, carrying the toner image thereon, in cooperation with the image carrier. The image carrier and sheet support member are driven such that their surfaces move in the same direction, as seen at a contact position where the two surfaces face each other via the sheet. An electric field, forcing the toner image toward the image carrier, and an electric field, forcing it toward the sheet, are formed between the surface of the image carrier and that of the sheet at positions upstream and downstream, respectively, of the contact position in the direction of movement of the sheet.
    Type: Application
    Filed: July 24, 2003
    Publication date: November 4, 2004
    Inventors: Hideki Kosugi, Sadayuki Iwai, Tomoko Takahashi, Masako Yoshii, Ayako Iino
  • Publication number: 20030147194
    Abstract: A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the firing step has a temperature raising step for raising a temperature to a firing temperature, and hydrogen is continued to be introduced from a point in time of the temperature raising step. According to the method, it is possible to provide a method of producing a multilayer ceramic electronic device, such as a multilayer ceramic capacitor, wherein shape anisotropy and other structural defaults are hard to occur and electric characteristics are improved while suppressing deterioration thereof even if dielectric layers becomes thinner and stacked more.
    Type: Application
    Filed: December 2, 2002
    Publication date: August 7, 2003
    Inventors: Takako Hibi, Yukie Nakano, Shunichi Yuri, Takahiro Ushijima, Akira Sato, Wataru Takahara, Masako Yoshii
  • Patent number: 5999773
    Abstract: An image forming apparatus includes a rotatable image bearing member and a contact-charging member which contacts a surface of the image bearing member. The contact-charging member can charge the image bearing member by applying a predetermined voltage to the contact-charging member so that a potential of the contact-charging member is changed to a required potential for transferring a residual toner that is stuck on a surface of the contact-charging member facing the image bearing member onto the image bearing member while the image bearing member stops rotating. A method for removing residual toner sticking onto a contact-charging member that contacts a surface of the image bearing member changes a potential of the contact charging member to a required cleaning potential for transferring the residual toner sticking to a surface of the contact-charging member facing the image bearing member onto the contact-charging member while the image bearing member stops rotating.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: December 7, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Yasutomi, Hidetoshi Yano, Masako Yoshii, Nobuto Yokokawa
  • Patent number: 5765087
    Abstract: The color image forming method of the kind sequentially forming toner images of different colors on an image carrier with developers of corresponding colors stored in a plurality of developing devices, sequentially transferring the toner images to a single paper or similar recording medium one above the other, and returning the toner left on the image carrier after the image transfer to the developing devices color by color, and an image forming apparatus practicable therewith. After the transfer of a toner image of any particular color to the paper wrapped around a transfer drum, a cleaning roller assigned to the above color each collects the toner remaining on the drum and again deposits it on the drum. The drum conveys the redeposited toner to one of the developing devices storing a developer of the same color as the toner.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: June 9, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Yano, Yasushi Nakazato, Takayuki Kimura, Masako Yoshii, Hiroyasu Itou
  • Patent number: 5740494
    Abstract: An image forming apparatus includes a cleaning member for collecting toner left on an image carrier after image transfer, and then redepositing it on the carrier, so that a developing unit can collect the redeposited toner to reuse it. Even when the frictional charging ability of the cleaning member falls due to aging or varying environment, the charge of the toner left on the image carrier is regulated to preselected polarity before the toner reaches the cleaning member, thereby enhancing a toner collecting efficiency and a toner redepositing efficiency. The charge of the toner redeposited on the image carrier and moved away from the cleaning member is regulated to preselected polarity while being increased, thereby reducing a load to act on the developing unit. The toner is redeposited on the image carrier efficiently without regard to the polarity of the toner collected by the cleaning member.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: April 14, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Shoji, Osamu Endo, Kei Yasutomi, Masako Yoshii, Hidetoshi Yano, Yasushi Nakazato, Takayuki Kimura