Patents by Inventor Yasuhiko Tokimasa
Yasuhiko Tokimasa 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: 8178166Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: GrantFiled: October 10, 2006Date of Patent: May 15, 2012Assignee: Fujifilm CorporationInventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Patent number: 7238237Abstract: The mounting is formed by grinding an integrally molded material with accuracy of the ?m order. An upper portion of the mounting is an L-shaped holding portion on which a slot die is positioned. An upper face of the holding portion contacts a lower face of the slot die, and a side face of the holding portion contacts a rear face of the slot die. The lower and rear faces of the slot die and the upper and side faces of the holding portion are formed to have such a straightness for the total length that the unevenness thereof may be in 5 ?m. Thus the slot die can be held with high accuracy, and the clearance accuracy between the lips and a web can be increased.Type: GrantFiled: March 23, 2005Date of Patent: July 3, 2007Assignee: Fujifilm CorporationInventors: Yasuhiko Tokimasa, Akio Tsuji, Yoshinobu Katagiri
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Publication number: 20070092655Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: ApplicationFiled: October 10, 2006Publication date: April 26, 2007Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Patent number: 7033644Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: GrantFiled: April 19, 2004Date of Patent: April 25, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Publication number: 20050211164Abstract: The mounting is formed by grinding an integrally molded material with accuracy of the ?m order. An upper portion of the mounting is an L-shaped holding portion on which a slot die is positioned. An upper face of the holding portion contacts a lower facer of the slot die, and a side face of the holding portion contacts a rear face of the slot die. The lower and rear races of the slot die and the upper and side faces of the holding portion are formed to have such a straightness for the total length that the unevenness thereof may be in 5 ?m. Thus the slot die can be held with high accuracy, and the clearance accuracy between the lips and a web can be increased.Type: ApplicationFiled: March 23, 2005Publication date: September 29, 2005Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yasuhiko Tokimasa, Akio Tsuji, Yoshinobu Katagiri
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Publication number: 20040247794Abstract: A coater to coat web includes an extrusion die, which has a die slot, for ejecting coating solution. A valve is disposed downstream from first and second conduits, for selectively feeding coating solution and bubble removing liquid to the extrusion die. A shifting mechanism moves the extrusion die between an offset position and a coating position. A controller causes the shifting mechanism to set the extrusion die in the offset position, feeds the bubble removing liquid to the extrusion die by setting the valve at the first conduit, feeds the coating solution by setting the valve at the second conduit, and causes the shifting mechanism to move the extrusion die to the coating position, to eject the coating solution from the extrusion die in the coating position. A bead of the coating solution is formed, for applying the coated layer to the web.Type: ApplicationFiled: June 2, 2004Publication date: December 9, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yasuhiko Tokimasa, Akio Tsuji
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Publication number: 20040197466Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: ApplicationFiled: April 19, 2004Publication date: October 7, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Publication number: 20040197480Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: ApplicationFiled: April 19, 2004Publication date: October 7, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Patent number: 6630208Abstract: A method to obtain and keep, at the time of actual coating, a uniform charge distribution on a web that is to be subsequently coated in order to establish stable high-speed coating provides a higher resistivity in a web edge area than that in a web central area by applying a subbing layer to the web central area while leaving the edge area free of the subbing layer.Type: GrantFiled: January 18, 2002Date of Patent: October 7, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri
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Publication number: 20030157252Abstract: A die of a coating apparatus for applying a coating solution includes down- and upstream blocks in a feeding direction of a web, which respectively have a first lip and a second lip. A lip land of the first lip is shorter than a lip land of the second lip in the feeding direction so as to satisfy a predetermined condition. In assembling the coating apparatus, bottoms of down- and upstream blocks are fixed to a fixer with bolts. Between the fixer and the downstream block, a plate member is provided such that the first lip land protrudes from the second lip land.Type: ApplicationFiled: January 6, 2003Publication date: August 21, 2003Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri, Akio Tsuji
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Patent number: 6607786Abstract: In curtain coating for multiple layers consisting of lower most layer, uppermost layer and intermediate layer, using coating liquid having viscosity more than 300 mPas for one layer or more of multiple layers improves amazingly the curtain coating stability against disturbance such as passing spliced portion of running web. The one layer or more layers for which coating liquid having viscosity more than 300 mPas is to be used is selected from intermediate layer. The curtain coating stability is further improved by combining the high viscosity coating liquid for intermediate layer with other technologies such as electrifying web, heating web upstream of coating point and/or keeping web tension higher than some specified value.Type: GrantFiled: February 26, 2002Date of Patent: August 19, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshinobu Katagiri, Yasuhiko Tokimasa, Yasushi Suga, Yoshihisa Noguchi
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Patent number: 6479107Abstract: In a simultaneous coating of multiple layers on a web using a slide hopper type coating apparatus, the gelatin concentration of the coating liquid for the bottom layer is set to be lower than the gelatin concentration of the coating liquid for the middle layer by at least 2 points in percentage, the ratio A/B, which is the flow amount ratio of the coating liquid for the bottom layer with respect to the entire multi-layered coating liquid, is set to be between 0.05 and 0.2, and the ratio C/D, which is the viscosity ratio between the coating liquid for the bottom layer and the coating liquid of the middle layer, is set to be between 0.2 and 0.67. Thereby, the flow of the multi-layered coating liquid flowing down on the slide surface can be stabilized.Type: GrantFiled: January 9, 2001Date of Patent: November 12, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshinobu Katagiri, Kazuhiro Oki, Yasuhiko Tokimasa
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Publication number: 20020160121Abstract: In curtain coating for multiple layers consisting of lower most layer, uppermost layer and intermediate layer, using coating liquid having viscosity more than 300 mPas for one layer or more of multiple layers improves amazingly the curtain coating stability against disturbance such as passing spliced portion of running web. The one layer or more layers for which coating liquid having viscosity more than 300 mPas is to be used is selected from intermediate layer. The curtain coating stability is further improved by combining the high viscosity coating liquid for intermediate layer with other technologies such as electrifying web, heating web upstream of coating point and/or keeping web tension higher than some specified value.Type: ApplicationFiled: February 26, 2002Publication date: October 31, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Yoshinobu Katagiri, Yasuhiko Tokimasa, Yasushi Suga, Yoshihisa Noguchi
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Publication number: 20020132058Abstract: An object of the invention is to provide a method to obtain and keep a uniform charge distribution on a web to be coated at the time of coating to establish stable high-speed coating. It was identified after some research that non-uniform charging is caused by not only non-uniformity at electrifying the web but also leakage of charge to transporting rollers from lateral edge area of the web while the web is transported contacting the rollers. An electrostatic charge on the electrified web leaks from one side surface when the one side contacts the roller and the amount of the leakage depends on a surface resistivity of the surface portion of web. If the leakage happens from a back surface (surface usually not to be coated), which causes leakage from a front surface area (surface to be coated) corresponding to the back surface area where the leakage happened.Type: ApplicationFiled: January 18, 2002Publication date: September 19, 2002Applicant: FUJI PHOTO FILM CO. LTD.Inventors: Yasuhiko Tokimasa, Yoshinobu Katagiri
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Publication number: 20010008653Abstract: In a simultaneous coating of multiple layers on a web using a slide hopper type coating apparatus, the gelatin concentration of the coating liquid for the bottom layer is set to be lower than the gelatin concentration of the coating liquid for the middle layer by at least 2 points in percentage, the ratio A/B, which is the flow amount ratio of the coating liquid for the bottom layer with respect to the entire multi-layered coating liquid, is set to be between 0.05 and 0.2, and the ratio C/D, which is the viscosity ratio between the coating liquid for the bottom layer and the coating liquid of the middle layer, is set to be between 0.2 and 0.67. Thereby, the flow of the multi-layered coating liquid flowing down on the slide surface can be stabilized.Type: ApplicationFiled: January 9, 2001Publication date: July 19, 2001Inventors: Yoshinobu Katagiri, Kazuhiro Oki, Yasuhiko Tokimasa