Patents by Inventor Naofumi Murata
Naofumi Murata 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: 11543764Abstract: An image forming apparatus is provided, which includes an image forming unit that forms a toner image on a recording material, a fixing unit that heats the recording material and fixes the toner image onto the recording material, and a heating-temperature control unit that controls a temperature of the fixing unit, and which performs an image forming operation of forming the toner image and fixing the toner image onto the recording material. In a case of performing the image forming operation a plurality of times, the heating-temperature control unit performs control such that the temperature of the fixing unit is a first temperature when performing the image forming operation a first number of times and that the temperature of the fixing unit is a second temperature when performing the image forming operation a second number of times.Type: GrantFiled: July 28, 2021Date of Patent: January 3, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Naofumi Murata
-
Publication number: 20220043378Abstract: An image forming apparatus is provided, which includes an image forming unit that forms a toner image on a recording material, a fixing unit that heats the recording material and fixes the toner image onto the recording material, and a heating-temperature control unit that controls a temperature of the fixing unit, and which performs an image forming operation of forming the toner image and fixing the toner image onto the recording material. In a case of performing the image forming operation a plurality of times, the heating-temperature control unit performs control such that the temperature of the fixing unit is a first temperature when performing the image forming operation a first number of times and that the temperature of the fixing unit is a second temperature when performing the image forming operation a second number of times.Type: ApplicationFiled: July 28, 2021Publication date: February 10, 2022Inventor: Naofumi Murata
-
Patent number: 11185397Abstract: A workpiece unit containing a workpiece body is provided. A method for producing the workpiece unit is also provided. The workpiece body contains a plurality of sections. The sections divide the processing surface of the workpiece body. The size of each section of the workpiece body can be adjusted or selected according to the demand so that it is possible to increase utilization efficiency of the workpiece body.Type: GrantFiled: March 18, 2016Date of Patent: November 30, 2021Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Yoshihisa Ito, Yoshihisa Yamada, Naofumi Murata
-
Publication number: 20210338400Abstract: A dental treatment assistance device includes a display, an input part into which input information on at least one of a use purpose and a use product is input, a memory that stores product information and process procedure information for a purpose of each product, a product information acquiring part that acquires the product information and the process procedure information corresponding to the input information input from the input part; and a display image control part that displays a predetermined process procedure selected from the process procedure information on the display.Type: ApplicationFiled: October 10, 2019Publication date: November 4, 2021Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Naofumi MURATA, Satoshi YAMAGUCHI
-
Patent number: 11029632Abstract: A fixing apparatus includes a thermal conductive member that is in contact with a heater and has a thermal conductivity higher than the thermal conductivity of a base material of the heater, and a thermal-resistant member that is disposed between the thermal conductive member and a support member configured to support the heater, a thermal resistance in a thickness direction of the thermal-resistant member being higher than the thermal resistance in the thickness direction of the thermal conductive member.Type: GrantFiled: April 29, 2019Date of Patent: June 8, 2021Assignee: Canon Kabushiki KaishaInventors: Tatsuya Kinukawa, Masashi Tanaka, Sho Taguchi, Naofumi Murata
-
Patent number: 10809654Abstract: A pressure roller, and the pressure roller to be used in a fixing apparatus of in an image forming apparatus, the fixing apparatus configured to heat a toner image formed on a recording material and fix the toner image on the recording material, the pressure roller including a first elastic layer, and a second elastic layer provided on an outside of the first elastic layer, wherein a thermal conductivity of the first elastic layer is higher than a thermal conductivity of the second elastic layer, and wherein the first elastic layer contains a plurality of void portions, hole pathway portions joining the plurality of void portions to each other, and a needle-shaped high thermal conductive filler.Type: GrantFiled: August 13, 2019Date of Patent: October 20, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Sho Taguchi, Naofumi Murata, Katsuhisa Matsunaka, Yutaka Arai
-
Publication number: 20200073295Abstract: A pressure roller, and the pressure roller to be used in a fixing apparatus of in an image forming apparatus, the fixing apparatus configured to heat a toner image formed on a recording material and fix the toner image on the recording material, the pressure roller including a first elastic layer, and a second elastic layer provided on an outside of the first elastic layer, wherein a thermal conductivity of the first elastic layer is higher than a thermal conductivity of the second elastic layer, and wherein the first elastic layer contains a plurality of void portions, hole pathway portions joining the plurality of void portions to each other, and a needle-shaped high thermal conductive filler.Type: ApplicationFiled: August 13, 2019Publication date: March 5, 2020Inventors: Sho Taguchi, Naofumi Murata, Katsuhisa Matsunaka, Yutaka Arai
-
Patent number: 10545440Abstract: Provided is a pressure roller for an image heating device that forms a nip part together with a heating member, the pressure roller including at least a mandrel, a first elastic layer, and a second elastic layer provided between the mandrel and the first elastic layer, wherein the first elastic layer has open-cell voids, is made of rubber, and has a thickness of at least 50 ?m and less than 500 ?m, and the second elastic layer is made of solid rubber.Type: GrantFiled: July 18, 2018Date of Patent: January 28, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shoichiro Ikegami, Naofumi Murata, Yutaka Arai, Jun Miura
-
Patent number: 10520864Abstract: An image forming apparatus includes an image forming portion that forms an image on a recording material, and a fixing portion including a cylindrical heat transfer member, and a heating member contacting an inner surface of the heat transfer member. The fixing portion fixes the image on the recording material by heating the recording material, on which the image has been formed, by heat from the heating member through the heat transfer member. A control unit controls a target temperature of the heating member, and analyzes whether or not a plurality of pixels, of image data corresponding to the image to be formed on the recording material, in each interval corresponding to a circumferential length of the heat transfer member, with respect to a recording material feeding direction, are pixels for forming an image with a predetermined density or more, and sets the target temperature depending on an analyzation result.Type: GrantFiled: October 3, 2018Date of Patent: December 31, 2019Assignee: Canon Kabushiki KaishaInventors: Sho Taguchi, Masashi Tanaka, Tatsuya Kinukawa, Naofumi Murata
-
Publication number: 20190339638Abstract: A fixing apparatus includes a thermal conductive member that is in contact with a heater and has a thermal conductivity higher than the thermal conductivity of a base material of the heater, and a thermal-resistant member that is disposed between the thermal conductive member and a support member configured to support the heater, a thermal resistance in a thickness direction of the thermal-resistant member being higher than the thermal resistance in the thickness direction of the thermal conductive member.Type: ApplicationFiled: April 29, 2019Publication date: November 7, 2019Inventors: Tatsuya Kinukawa, Masashi Tanaka, Sho Taguchi, Naofumi Murata
-
Patent number: 10281858Abstract: A roller usable in an image fixing device for an electrophotographic image forming apparatus includes a first elastic layer; a second elastic layer provided closer to a center of the roller than the first elastic layer, the second elastic layer having a thermal conductivity in a thickness direction higher than that of the first elastic layer; a third elastic layer provided between the first elastic layer and the second elastic layer, wherein an indentation elastic modulus EIT1 of the first elastic layer, an indentation elastic modulus EIT2 of the second elastic layer, and an indentation elastic modulus of the third elastic layer satisfy E1T1<E1T3<E1T2.Type: GrantFiled: June 21, 2018Date of Patent: May 7, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Naofumi Murata, Shoichiro Ikegami, Yutaka Arai, Jun Miura
-
Publication number: 20190101854Abstract: An image forming apparatus includes an image forming portion configured to form an image on a recording material; a fixing portion including a cylindrical heat transfer member and a heating member contacting an inner surface of the heat transfer member and configured to fix the image on the recording material by heating the image-formed recording material by heat from the heating member through the heat transfer member; and a control unit configured to control a target temperature of the heating member. The control unit analyzes whether or not a plurality of pixels, of image data corresponding to the image to be formed on the recording material, in each interval corresponding to a circumferential length of the heat transfer member with respect to a recording material feeding direction are pixels for forming an image with a predetermined density or more, and sets the target temperature depending on an analyzation result.Type: ApplicationFiled: October 3, 2018Publication date: April 4, 2019Inventors: Sho Taguchi, Masashi Tanaka, Tatsuya Kinukawa, Naofumi Murata
-
Publication number: 20190033762Abstract: Provided is a pressure roller for an image heating device that forms a nip part together with a heating member, the pressure roller including at least a mandrel, a first elastic layer, and a second elastic layer provided between the mandrel and the first elastic layer, wherein the first elastic layer has open-cell voids, is made of rubber, and has a thickness of at least 50 ?m and less than 500 ?m, and the second elastic layer is made of solid rubber.Type: ApplicationFiled: July 18, 2018Publication date: January 31, 2019Inventors: Shoichiro Ikegami, Naofumi Murata, Yutaka Arai, Jun Miura
-
Publication number: 20180373183Abstract: A roller usable in an image fixing device for an electrophotographic image forming apparatus includes a first elastic layer; a second elastic layer provided closer to a center of the roller than the first elastic layer, the second elastic layer having a thermal conductivity in a thickness direction higher than that of the first elastic layer; a third elastic layer provided between the first elastic layer and the second elastic layer, wherein an indentation elastic modulus EIT1 of the first elastic layer, an indentation elastic modulus EIT2 of the second elastic layer, and an indentation elastic modulus of the third elastic layer satisfy EIT1<EIT3<IIT2.Type: ApplicationFiled: June 21, 2018Publication date: December 27, 2018Inventors: Naofumi Murata, Shoichiro Ikegami, Yutaka Arai, Jun Miura
-
Publication number: 20180243054Abstract: A workpiece unit containing a workpiece body is provided. A method for producing the workpiece unit is also provided. The workpiece body contains a plurality of sections. The sections divide the processing surface of the workpiece body. The size of each section of the workpiece body can be adjusted or selected according to the demand so that it is possible to increase utilization efficiency of the workpiece body.Type: ApplicationFiled: March 18, 2016Publication date: August 30, 2018Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Yoshihisa ITO, Yoshihisa YAMADA, Naofumi MURATA
-
Patent number: 9817348Abstract: The roller for use in a fixing device, includes a metal core, a first elastic layer formed on an outer side of the metal core, the first elastic layer having voids, and a second elastic layer formed on an outer side of the first elastic layer, the second elastic layer having a microhardness higher than a microhardness of the first elastic layer, in which an outer diameter of an end portion of the roller is larger than an outer diameter of a middle portion of the roller in a longitudinal direction of the roller, and in which the microhardness of the second elastic layer is 25 degrees or more and 50 degrees or less.Type: GrantFiled: June 3, 2016Date of Patent: November 14, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Naofumi Murata, Tomoo Akizuki, Shoichiro Ikegami
-
Publication number: 20160370739Abstract: The roller for use in a fixing device, includes a metal core, a first elastic layer formed on an outer side of the metal core, the first elastic layer having voids, and a second elastic layer formed on an outer side of the first elastic layer, the second elastic layer having a microhardness higher than a microhardness of the first elastic layer, in which an outer diameter of an end portion of the roller is larger than an outer diameter of a middle portion of the roller in a longitudinal direction of the roller, and in which the microhardness of the second elastic layer is 25 degrees or more and 50 degrees or less.Type: ApplicationFiled: June 3, 2016Publication date: December 22, 2016Inventors: Naofumi Murata, Tomoo Akizuki, Shoichiro Ikegami
-
Patent number: 9271901Abstract: The present invention provides a one-part dental adhesive composition that exhibits excellent adhesive property and bond durability to a tooth structure (particularly dentin) and has high stability to ambient light, in which respective components have been mixed uniformly. The present invention is a one-part dental adhesive composition including a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the general formula (1), water (C), and a polymerization initiator (D). A content of the polymerizable monomer (A) having an acidic group is 5.5 to 35 parts by weight in 100 parts by weight of the total amount of polymerizable monomers. (In the formula, R1 denotes a hydrogen atom or a methyl group, and Rf denotes a fluoroalkyl group having 1 to 20 carbon atoms.Type: GrantFiled: March 25, 2011Date of Patent: March 1, 2016Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Ai Hinamoto, Naoki Nishigaki, Naofumi Murata
-
Patent number: 9014584Abstract: An image forming apparatus includes a first image bearing member (drum); a second drum; a belt; a first transfer unit; a second transfer unit; a first voltage applying unit; a second voltage applying unit; a detecting unit, connected to the first transfer unit, for detecting a value of a current passing through the first voltage applying unit; and a controller for controlling the first voltage applying unit and the second voltage applying unit. The controller controls the first voltage applying unit during image formation on the basis of a detection result of the value of the current detected by the detecting unit at timing before and after the voltage applied to the second voltage applying unit is changed plural times before the image formation.Type: GrantFiled: October 4, 2012Date of Patent: April 21, 2015Assignee: Canon Kabushiki KaishaInventors: Naofumi Murata, Masahiro Suzuki
-
Patent number: 8839808Abstract: In an assembling structure of an actuator part of a chemical liquid valve, a cover is formed with a protrusion extending in a radial direction of a valve element, and a cylinder is formed with an engagement part engageable with the protrusion. A cover is placed to hold a spring in a compressed state in the cylinder and make a cap part cover an opening of the cylinder. The protrusion and the engagement part are engaged with each other to integrally connect the cylinder and the cover without separating from each other.Type: GrantFiled: October 28, 2010Date of Patent: September 23, 2014Assignee: CKD CorporationInventors: Naofumi Murata, Hiroyuki Murase, Kazuhiro Sugata, Shinji Ikenoya