Patents Assigned to Ricoh Company, Ltd.
  • Patent number: 10295797
    Abstract: An imaging device includes two imaging optical systems each of the imaging optical systems including a wide-angle lens having an angle of view wider than 180 degrees, and an imaging sensor configured to image an image by the wide-angle lens, so as to obtain an image in a solid angle of 4? radian by synthesizing the images by the respective imaging optical systems, wherein the wide-angle lens of each of the imaging optical systems includes, in order from an object side to an image side, a front group having a negative power, a reflection surface and a back group having a positive power, and is configured to bend an optical axis of the front group by the reflection surface at 90 degrees toward the back group.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kensuke Masuda, Noriyuki Terao, Yoshiaki Irino, Tomonori Tanaka, Nozomi Imae, Toru Harada, Hirokazu Takenaka, Hideaki Yamamoto, Satoshi Sawaguchi, Daisuke Bessho, Hiroyuki Satoh, Makoto Shohara
  • Patent number: 10292590
    Abstract: A method of performing an optical examination on a test object and an optical examination device. The method includes obtaining a first detection light quantity distribution that is a detection light quantity distribution obtained for each of a plurality of optical models that simulate the test object, obtaining, using the optical sensor, a second detection light quantity distribution that is a distribution of an amount of light detected on the test object, and selecting based on the first light quantity distribution and the second detection light quantity distribution, an optical model suited to the test object from the plurality of optical models. The optical examination device includes an optical sensor, and a control system to control the irradiation system to obtain an amount of light detected by the detection system.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: May 21, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Ishii, Yoichiro Takahashi, Toshihide Sasaki, Masayuki Fujiwara
  • Patent number: 10293555
    Abstract: Provided is a liquid material for forming a three-dimensional object. The liquid material is adapted to harden a powder material for forming a three-dimensional object containing an organic material. The liquid material contains a solvent and a cross-linking agent. A dynamic contact angle of the liquid material over a film made of the organic material is from 20° to 80°.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Mariko Kojima, Yoshihiro Norikane, Keiko Osaka, Hiroshi Iwata, Mitsuru Naruse, Nozomu Tamoto
  • Patent number: 10293595
    Abstract: An apparatus for fabricating a three-dimensional object includes a flattening unit, a fabrication liquid discharger, and circuitry. The flattening unit transfers and flattens powder deposited on the stage. The fabrication liquid discharger discharges droplets of fabrication liquid on a surface of the powder on the stage to bind the powder together to fabricate a layered fabrication object. The circuitry repeats an operation of transferring and flattening the powder by the flattening unit and an operation of discharging droplets of the fabrication liquid on the surface of the powder on the stage by the fabrication liquid discharger to fabricate the three-dimensional object by a process of lamination. The circuitry discharges a plurality of first droplets of the fabrication liquid on the surface of the powder on the stage such that at least two adjacent first droplets partially overlap.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 21, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Daichi Yamaguchi
  • Patent number: 10295919
    Abstract: A toner is provided. The toner includes toner particles each including a mother particle and external additive particles covering the mother particle. In a SEM image of the toner, toner particles having a ratio Sd/St of from 5% to 50% are present at a frequency of 15% or more, where Sd representing an area of a largest recessed portion D of each toner particle and St representing whole area of the toner particle, Sd and St determined from the SEM image magnified and binarized to discriminate recessed portions and projected portions of the toner particle from each other. An external additive coverage rate Ca at the largest recessed portion D is from 30% to 100%.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiji Makabe, Tsuneyasu Nagatomo, Kohsuke Satoh, Kenji Yoneda
  • Patent number: 10293689
    Abstract: A display device is for displaying a virtual image in front of a driver of a vehicle. The display device includes a detecting unit that receives light surrounding the vehicle, and detects a brightness of the received light; a restricting unit that restricts an angle of the received light; a correcting unit that adjusts a luminance of a display image, according to the detected brightness of the light; and a displaying unit that superimposes and displays the display image on a field of vision of the driver as the virtual image, based on the adjusted luminance. The restricting unit includes two opening restricting elements arranged on a front side of the detecting unit, such that an angle ?2 at which the detecting unit receives the light is restricted according to an angle ?1 formed by light beams directed from the virtual image toward eyes of the driver.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Tetsuya Ogata
  • Patent number: 10295805
    Abstract: A zooming optical system includes a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a fourth lens group having positive refractive power, in that order from an object side. The first lens group has at least one cemented lens having positive refractive power. Each of the first lens group, the second lens group, the third lens group, and the fourth lens group are configured to move along a direction of an optical axis in zooming. Conditional expression (1) below is satisfied: ?10.0<f2/f1<?2.0??(1), where f1 is a focal length of the first lens group, and f2 is a focal length of the second lens group.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Takahiko Ohishi
  • Patent number: 10296401
    Abstract: An image forming apparatus including an application is disclosed. The image forming apparatus includes a determining unit that, when the application starts in the image forming apparatus, checks first information indicating a function to be used by the application against second information indicating a function supported by the image forming apparatus so as to determine whether the function to be used by the application is executable, and changes operations of the application according to a determination result. The determining unit is automatically updated if the determining unit does not support a structure of the first information or a structure of the second information.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: May 21, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Tsutomu Ohishi
  • Patent number: 10296731
    Abstract: An apparatus includes a determination unit, an authentication unit, and a using unit. The determination unit determines, from among application programs enabling user authentication using user identification information stored in a storage medium, an application program having application information containing information representing that the user authentication can be performed, as an application program to be used for the user authentication. Using the application program determined by the determination unit, the authentication unit determines whether input information that is input by a user matches the user identification information stored in the storage medium so as to perform the user authentication. When the input information and the user identification information match, the using unit uses the information stored in the storage medium.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: May 21, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Jongsook Eun
  • Patent number: 10295931
    Abstract: A developing device includes a casing to contain developer and define a developer circulation passage, a developing roller to bear the developer, and at least one developer conveyor to convey the developer. The developer conveyor is disposed in the developer circulation passage and lower than the developing roller. The developing device satisfies M1/L2>0.56 g/cm and M1/M2>0.50, where M1 represents an amount of developer borne on the developing roller, L1 represents a width in which the developing roller bears the developer in a longitudinal direction of the developing roller; and M2 represents an amount of developer stored in the casing and excluding the amount of developer borne.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Tamaki, Ichiro Kadota, Keiichi Yoshida, Hiroshi Hosokawa
  • Patent number: 10295937
    Abstract: A fixing device includes a heat generator being disposed inside a loop formed by a rotator and including a heat generating portion to radiate radiant heat. A reflector is disposed inside the loop formed by the rotator and includes a reflection face to reflect the radiant heat radiated from the heat generator toward the rotator. A support supports the reflector. A holder holds each lateral end of the support in a longitudinal direction of the support, which is perpendicular to the rotation direction of the rotator. A fastener attaches the reflector to the support at an attachment position disposed at each lateral end of the reflector in a longitudinal direction of the reflector. The attachment position is disposed outboard from a lateral edge of the heat generating portion of the heat generator and disposed inboard from the holder in the longitudinal direction of the reflector.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazunari Sawada, Ippei Fujimoto, Kenji Ishii, Hiroyuki Shimada, Takashi Seto, Hiroshi Yoshinaga, Takayuki Seki
  • Patent number: 10295933
    Abstract: A removable device is to be detachably attached to an apparatus main body. The removable device includes a conveying drive gear attached to a first rotational shaft, an agitating drive gear attached to a second rotational shaft, and a torque transmission gear attached to a third rotational shaft. When an addendum circle diameter of the conveying drive gear is A, and an addendum circle diameter of the agitating drive gear is B, B>A is satisfied. The torque transmission gear moves around the conveying drive gear to access the agitating drive gear.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Kubota, Naoki Nakatake, Yoshiyuki Shimizu, Shoh Tsuritani, Manabu Hamada, Masato Tsuji, Masanari Fujita
  • Patent number: 10295938
    Abstract: A separator includes a base and a sheet. The base includes a first face to face a medium, a second face being opposite to the first face, and a third face being an end face in a longitudinal direction of the base. The sheet is disposed on a portion of each of the first and second faces that contacts or is adjacent to a rotator. The sheet has a length in a longitudinal direction thereof substantially equal to a length of the base in the longitudinal direction thereof. The sheet includes a projecting portion outboard from the length of the sheet in the longitudinal direction thereof. A combined length of the sheet and the projecting portion in the longitudinal direction of the sheet is greater than the length of the base in the longitudinal direction thereof. The projecting portion is attached to the second and third faces of the base.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichi Kato, Kenji Maeda, Hirochika Ohnishi
  • Patent number: 10295939
    Abstract: A fixing device includes an endless belt and a pressure rotator disposed opposite an outer circumferential surface of the endless belt. The pressure rotator has a first span in an axial direction of the endless belt. A nip formation pad, which is disposed opposite an inner circumferential surface of the endless belt, forms a fixing nip between the endless belt and the pressure rotator. The nip formation pad includes a belt-side face disposed opposite the endless belt. A radiant heater, which is disposed opposite the inner circumferential surface of the endless belt, heats the endless belt. A thermal conduction aid, which contacts the belt-side face of the nip formation pad, conducts heat in the axial direction of the endless belt. The thermal conduction aid has a second span within which the first span of the pressure rotator is provided at the fixing nip.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Yoshinaga, Kenji Ishii, Ippei Fujimoto, Takashi Seto, Takayuki Seki, Kazunari Sawada, Ryohei Matsuda
  • Patent number: 10295948
    Abstract: An image forming apparatus including an image bearer, a transfer-bias power source, an environment sensor, and a controller. The controller controls the transfer-bias power source to change the DC component and the AC component, according to the at least one of temperature and humidity detected by the environment sensor and a duty of the transfer bias. The duty is A/(A+B)×100[%] where A denotes an area on a return-directional side to move toner from the recording sheet back to the image bearer, relative to a center value (Voff) of a maximum value and a minimum value of the transfer bias in one cycle of a waveform of the transfer bias, and B denotes an area on a transfer-directional side to move the toner from the image bearer to the recording sheet, relative to the center value (Voff) in the one cycle.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Keigo Nakamura, Hirokazu Ishii, Kenji Sugiura, Takehide Mizutani, Atsushi Nagata, Naoto Kochi, Yuuji Wada, Shinya Tanaka
  • Patent number: 10296142
    Abstract: The information display device includes a display unit configured to display information; an irradiating unit configured to irradiate the display unit with light; at least one imaging unit configured to capture an image on the display unit; a controller configured to cause the irradiating unit to alternately switch irradiation and non-irradiation; a medium identifying unit configured to identify a first input medium that emits light and a second input medium that does not emit the light, used for inputting additional information to be added to the information, in accordance with images successively captured by the at least one imaging unit, by the controller causing the irradiating unit to alternately switch the irradiation and the non-irradiation; and a position detector configured to detect positions of the first input medium and the second input medium on the display unit in accordance with the images successively captured.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuichi Yoshimura, Shun Yokota
  • Patent number: 10296514
    Abstract: There is provided an information processing system including an information processing apparatus and a plurality of terminal devices, wherein each terminal device among the plurality of terminal devices is able to display information in a format supported in the terminal device, the terminal devices acquiring information in formats supported in the respective terminal devices from the information processing apparatus, the information processing apparatus comprising: a memory and one or more processors to execute the program and perform a process including: performing conversion operations for converting newly registered information in a given format into information in a plurality of formats; and distributing a completion report indicating completion of a conversion operation into any one of the plurality of formats upon the conversion operation into the one of the plurality of formats being completed.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Yosuke Oka
  • Patent number: 10293627
    Abstract: A printed matter is provided. The printed matter includes a porous printing medium and a printed layer. The printed layer contains silver and has a printed surface having an image clarity (2 mm), defined in Japanese Industrial Standards H8686-2, of 5.0 or more and a b* value in the range of from ?7.0 to +4.0.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Tomura, Yoshimasa Miyazawa, Takuya Fujita
  • Patent number: 10295930
    Abstract: An applied voltage control device includes a potential difference determiner and an applied voltage controller. The potential difference determiner determines a potential difference between a maximum alternating current development voltage and a minimum alternating current development voltage, depending on a developing potential that is an absolute value of a difference between an average electric potential of an alternating current development and an electric potential of a latent image, so as to maintain a constant maximum voltage of a developing bias in the alternating current development. The applied voltage controller controls an alternating current development voltage, applied to move developer from a developer bearer to the latent image, so as to obtain the potential difference determined by the potential difference determiner.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Emiko Shiraishi, Hiroaki Kuwabara
  • Patent number: 10297058
    Abstract: A display control apparatus obtains coordinate information indicating a specific coordinate on a display surface that a user activity is detected, determines whether a first image to be drawn at a position indicated by the coordinate information, at least partly overlaps a second image to be displayed together with the first image, and changes order information stored in a memory so as to cause the first image layer to be superimposed on the second image layer based on a determination indicating that the first image at least partly overlaps the second image.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Tatsuyuki Oikawa