Patents by Inventor Michiaki Fujiwara
Michiaki Fujiwara 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).
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Patent number: 6237196Abstract: The shaft 13 of a top roller T of a drafting device D is segmented into sections. The bearing holding section 13e includes a large diameter section at the base end and small diameter section 13e′ on the far end. A first bearing 14c is fitted over the large diameter section, and a second bearing 14d having a total diameter equivalent to the first bearing 14c, is fitted over the small diameter section 13e′.Type: GrantFiled: February 9, 2000Date of Patent: May 29, 2001Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 6032336Abstract: When a roller cylinder of a top roller is installed, it may collide against an outer bearing and damage it. Since the roller cylinder is loosened, when drafting is executed at a high speed, the roller cylinder may vibrate, causing non-uniform drafting. A pre-loading spring 30 is installed between an inner bearing 20 and an outer bearing 21 and on the inner circumferential side. Due to the elastic force of the pressurizing spring 30, inner rings 20b and 21b of the bearings rotate integrally with a shaft 10. When the roller cylinder 12 is installed, if it collides against the outer bearing 21, the pre-loading spring 30 acts as a buffer to prevent damage to the bearings. O-rings 31 and 32 installed between outer rings 20a and 21a of the bearings 20 and 21 fill the gap to prevent the roller cylinder 12 from loosening. As a result, uniform drafting can be executed at a high speed.Type: GrantFiled: February 8, 1999Date of Patent: March 7, 2000Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 5052173Abstract: In a spinning device or a yarn splicing device, respective ends of first and second yarn portions are transferred toward respective first and second untwisting devices. An untwisting operation of the second untwisting device is started and continues for a first time period. An untwisting operation of the first untwisting device is started at the lapse of the first time period.Type: GrantFiled: March 13, 1990Date of Patent: October 1, 1991Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 5044148Abstract: In doubling two yarns to wind it on a package, a splicing part is displaced between a splicing part of one yarn and a splicing part of the other yarn so as to present a deviation in phase when the yarns are doubled, single yarns are used to make splicing, after which the yarn is wound on the package.Type: GrantFiled: January 24, 1990Date of Patent: September 3, 1991Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 4942731Abstract: A spinning apparatus which includes a drafting device, a twisting device and a take-up device is constituted such that the spinning apparatus further includes a guide device for guiding the fiber bundle in the separated condition in a plurality of rows and the twisting device includes a plurality of rows of twisting mechanism which can twist a plurality of rows of fiber bundle at a time.Type: GrantFiled: December 7, 1988Date of Patent: July 24, 1990Assignee: Murata Kikai Kabushiki KaishaInventors: Toshifumi Morihashi, Shoji Sakai, Teruo Nakayama, Koshi Noda, Michiaki Fujiwara
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Patent number: 4939893Abstract: A spinning apparatus of the type which includes a large number of spinning units provided in a juxtaposed relationship, and a yarn splicing bogie for traveling along the spinning units to effect a yarn splicing operation for the spinning units. Each of the spinning units includes a drafting device, an air jetting nozzle for applying a twist to a fiber bundle drafted at the drafting device, and a winding device for winding a yarn spun out from the air jetting nozzle, and a yarn splicing device on the yarn splicing bogie is formed as a pneumatic yarn splicing device.Type: GrantFiled: July 20, 1988Date of Patent: July 10, 1990Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 4676057Abstract: A spinning machine including a plurality of spinning units having a yarn detecting device, respectively, and a knotting truck disposed to be movable along the spinning units further provides detecting device for detecting the yarn joining operation of the knotting truck, an arithmetic part for counting the times of the yarn joining operation and device for indicating the percentage of successful joining.Type: GrantFiled: January 31, 1986Date of Patent: June 30, 1987Assignee: Murata Kikai Kabushiki KaishaInventor: Michiaki Fujiwara
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Patent number: 4550886Abstract: A yarn end sucking and holding device for a package mounted on a winder. The yarn end sucking and holding device has a suction mouth with a slit formed thereon in parallel with the direction of axis of a package facing to a layer of yarn on the package and a engagement member in the form of a blade is fixedly fitted to a side wall of the suction mouth.Type: GrantFiled: May 3, 1984Date of Patent: November 5, 1985Assignee: Murata Kikai Kabushiki KaishaInventors: Michiaki Fujiwara, Toshiharu Ikeda
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Patent number: 4538329Abstract: A draft device for a spinning machine comprises a plurality of pairs of a top roller and a bottom roller, a draft cradle for supporting shafts of the top roller and a belt tenser. Top roller shafts are supported by a top roller support which is rotatably supported on a frame at one end thereof and side plates for fitting the top roller shafts therein, and spring members for pressing the roller shafts are disposed within the top roller support. A tenser of the belt tenser has an engaging portion wherein the top roller shaft is loosely fitted.Type: GrantFiled: October 29, 1981Date of Patent: September 3, 1985Assignee: Murata Kikai Kabushiki KaishaInventors: Shoji Sakai, Michiaki Fujiwara, Nobunori Kubota, Koshi Noda
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Patent number: 4535944Abstract: A spinning machine wherein a yarn knotting truck having a knotter provided thereon travels in a truck travelling spacing provided along a number of spinning units further includes an apparatus for automatically doffing winding packages which have yarns fully wound thereon. A doffing truck which has provided thereon a doffing apparatus travels in the truck travelling spacing.Type: GrantFiled: July 15, 1983Date of Patent: August 20, 1985Assignee: Murata Kikai Kabushiki KaishaInventors: Teiji Nakahara, Shoji Sakai, Koshi Noda, Michiaki Fujiwara, Nobunori Kubota
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Patent number: 4517794Abstract: A device for the uniform retrieval of yarn ends in an air spinning device. A suction force gradient is created between the air jet nozzle and the waste suction pipe. Gravitational force and the suction gradient cause broken yarn ends to drop from the air jet nozzle orifice toward the waste suction pipe. When yarn piecing is desired, a piecing suction pipe retrieves the yarn end from the nozzle orifice.Type: GrantFiled: December 28, 1981Date of Patent: May 21, 1985Assignee: Murata Kikai Kabushiki KaishaInventors: Shoji Sakai, Michiaki Fujiwara, Nobunori Kubota, Koshi Noda
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Patent number: 4457130Abstract: An air nozzle for spinning yarn is positioned adjacent a pair of drafting rollers. The space between a cap covering the nozzle and the nozzle itself forms a tank for the air to be jetted through the nozzle. A tapered throttle located behind the nozzle reduces resistance to air exiting from the jetting ports.Type: GrantFiled: December 28, 1981Date of Patent: July 3, 1984Assignee: Murata Kikai Kabushiki KaishaInventors: Shoji Sakai, Michiaki Fujiwara, Nobunori Kubota, Koshi Noda, Toshifumi Morihashi
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Patent number: 4456188Abstract: A yarn slacking apparatus for slacking and retaining a fed yarn therein during the knotting operation in a winder. The sucking action is caused in the slack tube only when the knotting operation is carried out, while the sucking action of the slack tube is stopped by means of providing a shutter means for an opening of the slack tube, when the knotting operation is not conducted.Type: GrantFiled: December 3, 1981Date of Patent: June 26, 1984Assignee: Murata Kikai Kabushiki KaishaInventors: Shoji Sakai, Michiaki Fujiwara, Nobunori Kubota, Koshi Noda
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Patent number: 4445252Abstract: A drafting device in a spinning machine including a cylindrical sliver guide and an adjusting guide for reshaping and controlling the sliver, and a traverse mechanism for an apron supported on the middle roller. The sliver guide is disposed in front of the back rollers and the adjusting guide is arranged between the back rollers and the middle rollers.Type: GrantFiled: November 13, 1981Date of Patent: May 1, 1984Assignee: Murata Kikai Kabushiki KaishaInventors: Toshifumi Morihashi, Koshi Noda, Teruo Nakayama, Shinichi Nishimura, Michiaki Fujiwara
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Patent number: 4419861Abstract: A spinning apparatus provided with a knotting truck moving along many spinning units. The knotting truck includes a yarn breakage detecting mechanism detecting a yarn breakage indicating plate of a unit where slub yarn breakage occures and a detecting mechanism detecting an impediment signal display plate of a unit where natural yarn breakage occurs. The knotting truck is only stopped at the position of the unit where slub yarn breakage occurs.Type: GrantFiled: October 16, 1981Date of Patent: December 13, 1983Assignee: Murata Kikai Kabushiki KaishaInventors: Michiaki Fujiwara, Makoto Uramoto
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Patent number: 4412413Abstract: An air current rectifier plate surrounds the foremost air jet nozzle in an air spinning device. The rectifier plate produces a non-turbulent flow of air toward the waste suction pipe and prevents debris from back-flowing into the air jet nozzle.Type: GrantFiled: December 28, 1981Date of Patent: November 1, 1983Assignee: Murata Machinery, Ltd.Inventors: Shoji Sakai, Michiaki Fujiwara, Nobunori Kubota, Koshi Noda