Patents by Inventor Koji Mizunuma
Koji Mizunuma 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: 11759989Abstract: An extruding unit, a forming roll unit and a thick portion forming mechanism are provided. The extruding unit has an ejecting slit which ejects sheet-shaped molten resin. The ejecting slit includes a standard gap portion and an enlarged gap portion. The standard gap portion is formed as a gap having a constant size. The enlarged gap portion is formed as a gap larger than the standard gap portion in a position corresponding to a thick portion. The thick portion forming mechanism forms one or several thick portions which are thicker than other portion, in the sheet-shaped molten resin continuously in the extrusion direction.Type: GrantFiled: September 12, 2022Date of Patent: September 19, 2023Assignee: Shibaura Machine Co., Ltd.Inventors: Koji Mizunuma, Yuusuke Uno, Masahiro Tanada
-
Patent number: 11731340Abstract: An apparatus includes a first roll and a second roll on each of which a pattern is formed, a first motor and a second motor to rotate the respective rolls, a shaft direction supporting mechanism to support the second roll along a shaft direction and an axial position adjusting mechanism configured to move the shaft direction supporting mechanism along the shaft direction. The posture of the rotating shaft of the second motor is maintained constant at all times, and the second roll is moved in the shaft direction along the first roll, thereby adjusting the positions of both patterns on the first roll and the second roll along the shaft direction.Type: GrantFiled: March 17, 2022Date of Patent: August 22, 2023Assignee: SHIBAURA MACHINE CO., LTD.Inventors: Koji Mizunuma, Ryota Oke, Tomonori Yamaguchi, Akihiro Iwata
-
Publication number: 20230001620Abstract: An extruding unit, a forming roll unit and a thick portion forming mechanism are provided. The extruding unit has an ejecting slit which ejects sheet-shaped molten resin. The ejecting slit includes a standard gap portion and an enlarged gap portion. The standard gap portion is formed as a gap having a constant size. The enlarged gap portion is formed as a gap larger than the standard gap portion in a position corresponding to a thick portion. The thick portion forming mechanism forms one or several thick portions which are thicker than other portion, in the sheet-shaped molten resin continuously in the extrusion direction.Type: ApplicationFiled: September 12, 2022Publication date: January 5, 2023Applicant: Shibaura Machine Co., Ltd.Inventors: Koji Mizunuma, Yuusuke Uno, Masahiro Tanada
-
Patent number: 11472086Abstract: An extruding unit, a forming roll unit and a thick portion forming mechanism are provided. The extruding unit has an ejecting slit which ejects sheet-shaped molten resin. The ejecting slit includes a standard gap portion and an enlarged gap portion. The standard gap portion is formed as a gap having a constant size. The enlarged gap portion is formed as a gap larger than the standard gap portion in a position corresponding to a thick portion. The thick portion forming mechanism forms one or several thick portions which are thicker than other portion, in the sheet-shaped molten resin continuously in the extrusion direction.Type: GrantFiled: November 21, 2017Date of Patent: October 18, 2022Assignee: SHIBAURA MACHINE CO., LTD.Inventors: Koji Mizunuma, Yuusuke Uno, Masahiro Tanada
-
Publication number: 20220203601Abstract: An apparatus includes a first roll and a second roll on each of which a pattern is formed, a first motor and a second motor to rotate the respective rolls, a shaft direction supporting mechanism to support the second roll along a shaft direction and an axial position adjusting mechanism configured to move the shaft direction supporting mechanism along the shaft direction. The posture of the rotating shaft of the second motor is maintained constant at all times, and the second roll is moved in the shaft direction along the first roll, thereby adjusting the positions of both patterns on the first roll and the second roll along the shaft direction.Type: ApplicationFiled: March 17, 2022Publication date: June 30, 2022Applicant: SHIBAURA MACHINE CO., LTD.Inventors: KOJI MIZUNUMA, Ryota Oke, Tomonori Yamaguchi, Akihiro Iwata
-
Patent number: 11312063Abstract: An apparatus includes a first roll and a second roll on each of which a pattern is formed, a first motor and a second motor to rotate the respective rolls, a shaft direction supporting mechanism to support the second roll along a shaft direction and an axial position adjusting mechanism configured to move the shaft direction supporting mechanism along the shaft direction. The posture of the rotating shaft of the second motor is maintained constant at all times, and the second roll is moved in the shaft direction along the first roll, thereby adjusting the positions of both patterns on the first roll and the second roll along the shaft direction.Type: GrantFiled: July 19, 2018Date of Patent: April 26, 2022Assignee: SHIBAURA MACHINE CO., LTD.Inventors: Koji Mizunuma, Ryota Oke, Tomonori Yamaguchi, Akihiro Iwata
-
Patent number: 10836081Abstract: A thin film member forming device includes a reference roll fixedly disposed while being rotatably supported by a first bearing member, a movable roll disposed movably with respect to the reference roll while being rotatably supported by a second bearing member, a roll gap adjusting mechanism which adjusts a gap between the reference roll and the movable roll and a roll opening mechanism which expands the gap. The roll gap adjusting mechanism adds a load in a direction to narrow the gap to the second bearing member, and the roll opening mechanism adds a load in a direction to expand the gap to the second bearing member.Type: GrantFiled: May 31, 2018Date of Patent: November 17, 2020Assignee: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: Koji Mizunuma, Tadamasa Furuya, Tomonori Yamaguchi
-
Publication number: 20190047186Abstract: An optical sheet forming technique includes an extrusion unit having a discharge slit, a forming roll unit having rolls rotatable about rotation axes, a thick portion forming groove provided in the forming roll unit, and a position adjustment mechanism which adjusts a position of a discharge slit with respect to the thick portion forming groove. In a discharged molten resin, a neck-in portion caused by a neck-in phenomenon is continuously formed in an extrusion direction. The neck-in portion is positioned to be opposed to the thick portion forming groove by the position adjustment mechanism.Type: ApplicationFiled: October 17, 2018Publication date: February 14, 2019Applicant: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: Koji MIZUNUMA, Daichi YUKAWA, Yuta YAMAMURO
-
Publication number: 20190022920Abstract: An apparatus includes a first roll and a second roll on each of which a pattern is formed, a first motor and a second motor to rotate the respective rolls, a shaft direction supporting mechanism to support the second roll along a shaft direction and an axial position adjusting mechanism configured to move the shaft direction supporting mechanism along the shaft direction. The posture of the rotating shaft of the second motor is maintained constant at all times, and the second roll is moved in the shaft direction along the first roll, thereby adjusting the positions of both patterns on the first roll and the second roll along the shaft direction.Type: ApplicationFiled: July 19, 2018Publication date: January 24, 2019Applicant: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: KOJI MIZUNUMA, RYOTA OKE, TOMONORI YAMAGUCHI, AKIHIRO IWATA
-
Publication number: 20180345543Abstract: A thin film member forming device includes a reference roll fixedly disposed while being rotatably supported by a first bearing member, a movable roll disposed movably with respect to the reference roll while being rotatably supported by a second bearing member, a roll gap adjusting mechanism which adjusts a gap between the reference roll and the movable roll and a roll opening mechanism which expands the gap. The roll gap adjusting mechanism adds a load in a direction to narrow the gap to the second bearing member, and the roll opening mechanism adds a load in a direction to expand the gap to the second bearing member.Type: ApplicationFiled: May 31, 2018Publication date: December 6, 2018Applicant: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: Koji Mizunuma, Tadamasa Furuya, Tomonori Yamaguchi
-
Publication number: 20180111307Abstract: An extruding unit, a forming roll unit and a thick portion forming mechanism are provided. The extruding unit has an ejecting slit which ejects sheet-shaped molten resin. The ejecting slit includes a standard gap portion and an enlarged gap portion. The standard gap portion is formed as a gap having a constant size. The enlarged gap portion is formed as a gap larger than the standard gap portion in a position corresponding to a thick portion. The thick portion forming mechanism forms one or several thick portions which are thicker than other portion, in the sheet-shaped molten resin continuously in the extrusion direction.Type: ApplicationFiled: November 21, 2017Publication date: April 26, 2018Applicant: Toshiba Kikai Kabushiki KaishaInventors: Koji Mizunuma, Yuusuke Uno, Mashiro Tanada
-
Publication number: 20170282418Abstract: According to one embodiment, a rotating state of a second motor is transmitted to a second roll as it is. A posture of a rotation central axis of the second motor is maintained constant. A changed state of the second roll is not transmitted to the second motor. Thereby, the second roll is rotated with timing identical to the rotating state of the second motor.Type: ApplicationFiled: March 30, 2017Publication date: October 5, 2017Applicant: Toshiba Kikai Kabushiki KaishaInventors: Koji MIZUNUMA, Ryota OKE, Tomonori YAMAGUCHI, Akihiro IWATA
-
Patent number: 8241192Abstract: A sheet or film-forming roll 10 includes an inner cylinder member 20 having axial parts 21, 22 provided on both sides thereof and rotatably supported by bearing parts 26, 27 through the axial parts 21, 22, a rubber roll 40 fitted to an outer circumferential surface of the inner cylinder member 20, eccentric side plates 53, 54 rotatably fitted to the axial parts 21, 22 of the inner cylinder member 20 respectively, and an elastic outer cylinder member 50 rotatably supported by the eccentric side plates 53, 54. The elastic outer cylinder member 50, which is provided with a thin-walled structure and made from metal, has an inner diameter larger than an outer diameter of the rubber roll 40 to accommodate the rubber roll 40 in an interior 68 thereof, and has inner circumferential surface 50A coming into contact with an outer circumferential surface 40A of the rubber roll 40.Type: GrantFiled: September 8, 2010Date of Patent: August 14, 2012Assignee: Toshiba Kikai Kabushiki KaishaInventors: Takayoshi Sano, Tadamasa Furuya, Takehiro Yamamoto, Satoru Nitta, Koji Mizunuma, Takashi Hirose
-
Patent number: 8105064Abstract: For the purpose of molding a multilayered film/sheet having a highly precise thickness of each layer, movable choker bars (31, 32) are movably arranged in the middle of molten resin channels (111, 112), and a plurality of choker adjustment bolts (35, 36) are arranged at a predetermined pitch in the die width direction. The choker bars with the choker adjustment bolts are moved so as to adjust the gap in a choker portion. Thermal conductors (37, 38) are provided with the respective choker adjustment bolts.Type: GrantFiled: March 20, 2006Date of Patent: January 31, 2012Assignee: Toshiba Kikai Kabushiki KaishaInventors: Kenji Nozawa, Koji Mizunuma
-
Publication number: 20110003672Abstract: A sheet or film-forming roll 10 includes an inner cylinder member 20 having axial parts 21, 22 provided on both sides thereof and rotatably supported by bearing parts 26, 27 through the axial parts 21, 22, a rubber roll 40 fitted to an outer circumferential surface of the inner cylinder member 20, eccentric side plates 53, 54 rotatably fitted to the axial parts 21, 22 of the inner cylinder member 20 respectively, and an elastic outer cylinder member 50 rotatably supported by the eccentric side plates 53, 54. The elastic outer cylinder member 50, which is provided with a thin-walled structure and made from metal, has an inner diameter larger than an outer diameter of the rubber roll 40 to accommodate the rubber roll 40 in an interior 68 thereof, and has inner circumferential surface 50A coming into contact with an outer circumferential surface 40A of the rubber roll 40.Type: ApplicationFiled: September 8, 2010Publication date: January 6, 2011Applicant: TOSHIBA KIKAI KABUSHIKI KAISHAInventors: Takayoshi Sano, Tadamasa Furuya, Takehiro Yamamoto, Satoru Nitta, Koji Mizunuma, Takashi Hirose
-
Patent number: 7811218Abstract: A sheet or film-forming roll 10 includes an inner cylinder member 20 having axial parts 21, 22 provided on both sides thereof and rotatably supported by bearing parts 26, 27 through the axial parts 21, 22, a rubber roll 40 fitted to an outer circumferential surface of the inner cylinder member 20, eccentric side plates 53, 54 rotatably fitted to the axial parts 21, 22 of the inner cylinder member 20 respectively, and an elastic outer cylinder member 50 rotatably supported by the eccentric side plates 53, 54. The elastic outer cylinder member 50, which is provided with a thin-walled structure and made from metal, has an inner diameter larger than an outer diameter of the rubber roll 40 to accommodate the rubber roll 40 in an interior 68 thereof, and has inner circumferential surface 50A coming into contact with an outer circumferential surface 40A of the rubber roll 40.Type: GrantFiled: September 22, 2006Date of Patent: October 12, 2010Assignee: Toshiba Kikai Kabushiki KaishaInventors: Takayoshi Sano, Tadamasa Furuya, Takehiro Yamamoto, Satoru Nitta, Koji Mizunuma, Takashi Hirose
-
Patent number: 7754117Abstract: The present invention enables an automatic roll gap adjustment, thereby facilitating operations at a set-up or when changing forming conditions. Specifically, one embodiment of the present invention controls a sheet take-off speed (a roll rotation speed) in accordance with a deviation of a measurement value from a set value of a roll gap under a constant pressing load control.Type: GrantFiled: August 17, 2006Date of Patent: July 13, 2010Assignee: Toshiba Kikai Kabushiki KaishaInventors: Koji Mizunuma, Yasutaka Matsumura
-
Patent number: 7754116Abstract: An sheet forming apparatus selectively uses two control modes: a constant roller gap control mode where a roller gap is controlled by a roller gap adjustment means so that the roller gap converges a predetermined control target value; and a constant pressing load control mode where the roller gap is controlled by the roller adjustment means so that a pressing load converges a predetermined control target value.Type: GrantFiled: May 22, 2006Date of Patent: July 13, 2010Assignee: Toshiba Kikai Kabushiki KaishaInventors: Koji Mizunuma, Tomonori Yamaguchi, Takehiro Yamamoto, Tomokazu Abe
-
Publication number: 20090035410Abstract: For the purpose of molding a multilayered film/sheet having a highly precise thickness of each layer, movable choker bars (31, 32) are movably arranged in the middle of molten resin channels (111, 112), and a plurality of choker adjustment bolts (35, 36) are arranged at a predetermined pitch in the die width direction. The choker bars with the choker adjustment bolts are moved so as to adjust the gap in a choker portion. Thermal conductors (37, 38) are provided with the respective choker adjustment bolts.Type: ApplicationFiled: March 20, 2006Publication date: February 5, 2009Applicant: TOSHIBA KIKAI KAUBUSHIKI KAISHAInventors: Koji Mizunuma, Kenji Nozawa
-
Patent number: 7484950Abstract: A first forming roll and a second forming roll are provided parallel and opposite to each other, and a double-surface formed sheet is formed by the first forming roll and the second forming roll.Type: GrantFiled: December 30, 2005Date of Patent: February 3, 2009Assignee: Toshiba Kikai Kabushiki KaishaInventors: Koji Mizunuma, Toshihiko Kusago