Patents by Inventor Akimichi Takeda
Akimichi Takeda 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: 6635843Abstract: To provide a strip connecting apparatus and a method therefor which are less costly, short in welding time and high in welding quality. A strip connecting apparatus is provided with: a surface coating removing device for removing insulative surface coating of end portions, to be welded, of a leading strip and a trailing strip before cutting the strips; a cutting device for cutting the end portions, to be welded, of the leading strip and the trailing strip; and a welding device for overlapping the cut end portions of the leading strip and the trailing strip and seam welding the cut end portions with each other.Type: GrantFiled: May 25, 2000Date of Patent: October 21, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Keiji Sodeno, Masaru Yoshida
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Patent number: 6612477Abstract: A strip joining apparatus is provided wherein a time which a line is stopped is shortened, a number of installation spaces is decreased and precise notching may be performed.Type: GrantFiled: February 7, 2002Date of Patent: September 2, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Shigeru Adachi, Masaru Yoshida
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Publication number: 20030015568Abstract: A strip joining apparatus is provided wherein a time which a line is stopped is shortened, a number of installation spaces is decreased and precise notching may be performed.Type: ApplicationFiled: February 7, 2002Publication date: January 23, 2003Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Akimichi Takeda, Shigeru Adachi, Masaru Yoshida
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Patent number: 6462299Abstract: An abutting end portions of the strips are heated from below to a temperature range where annealing effects are obtained by means of a movable heating apparatus which performs high-frequency induction heating and a laser beam (or arc or electron beam) is irradiated from above, at the same speed as that of the movable heating apparatus, to laser beam weld (or arc or electron beam weld) the abutting end portions.Type: GrantFiled: November 27, 2000Date of Patent: October 8, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Masaru Yoshida, Akio Inoue
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Patent number: 5883353Abstract: In a welding electrode protecting machine, welding electrodes are protected against a surface treating agent on strips to be welded by applying a proper amount of electrode protecting agent onto surfaces of welding electrodes prior to or during welding operation.Type: GrantFiled: July 25, 1996Date of Patent: March 16, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaru Yoshida, Akimichi Takeda, Junji Miyata
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Patent number: 5698118Abstract: A flash welding machine is capable of cutting ends of a pair of preceding and following weld members 1, 2 by means of a shear device 26, 27 and then flash welding them with each other. The flash welding machine can coat an appropriate amount of combustible fluid on the cut end surfaces of the weld members 1, 2. When a first end sensor 31 and a second end sensor 31 sense widthwise leading ends of the weld members 1, 2, a first and a second nozzle 35, 36 start coating the combustible fluid on the cut end surfaces of the weld members 1, 2 from the widthwise leading ends of the weld meets 1, 2. The nozzles 35, 36 stop coating when either one of the sensors 31, 33 senses a widthwise trailing end of one of the weld members 1, 2. Thus, it becomes possible to coat the combustible fluid on the cut ends of the weld members 1, 2 over an area extending from the widthwise leading end to the widthwise trailing end thereof.Type: GrantFiled: November 13, 1996Date of Patent: December 16, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Junji Miyata, Masaru Yoshida
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Patent number: 5030313Abstract: An apparatus for connecting strips, in which a rear end portion of a preceding strip and a front end portion of a succeeding strip are cut and brought into contact to each other so that a butt welding of the contacted portions may be carried out to connect both the strips. A carriage is provided for carrying a cutting device for cutting the end portions of both the strips. A finish-machining device is provided for finish-machining the cut end faces of both the strips and a welding device for butt welding both the strips along a contacting line of both the strips is installed so as to be movable in a line substantially parallel with the contacting line of both the strips. Die wears and burrs incidental to cut faces can be prevented from forming and the highly accurate contacted state of strips can be achieved, thereby improving the quality of the welded portion.Type: GrantFiled: June 14, 1990Date of Patent: July 9, 1991Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Katsumi Morikawa, Seizo Koide
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Patent number: 4626647Abstract: A flash welding machine for butt welding the trailing edge of a preceding metal strip to the leading edge of a following metal strip in a rolling mill or the like. A preceding carriage and a following carriage are provided, movably mounted on a common set of rails. Each carriage is provided with electrodes capable of clamping respective ones of the preceding strip and the following strip when the two strips are in abutment with on another. Welding cylinders are provided for selectively joining the two carriers when the two strips are in abutment and the welding operation is to be performed, and then releasing the carriers from one another.Type: GrantFiled: July 18, 1985Date of Patent: December 2, 1986Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akimichi Takeda, Akiyoshi Uomori
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Patent number: 4205214Abstract: A flash and upset material formed in a flash welding operation can be removed by a machining of the flash and upset material for a short time after the welding operation by providing a workpiece clamping function by a main clamp and providing a welding current feeding function by an electrode table. The main clamp is heavy whereas the electrode table is light so as to be easily movable, whereby the electrode table in the light weight can be backwardly shifted for a short time after the welding operation and a space for inserting a tool holder equipping with a tool for machining a flash and upset material, is formed near the welded line. Since the flash and upset material can be machined during the time maintaining the softness of the flash and upset material at relatively high temperature for a short time, the machining can be attained by only pair of tools.Type: GrantFiled: July 10, 1978Date of Patent: May 27, 1980Assignees: Mitsubishi Denki Kabushiki Kaisha, Nippon Steel CorporationInventors: Takao Suzuki, Yoshimasa Komatsu, Akimichi Takeda, Toshihiko Baba