Patents by Inventor Tomohisa Kakuda
Tomohisa Kakuda 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: 11046043Abstract: Provided is a linerless thermosensitive recording body package, a roll of a linerless thermosensitive recording sheet being packaged in the linerless thermosensitive recording body package, the linerless thermosensitive recording sheet including a support, a thermosensitive color developing layer over one surface of the support, a release layer over the thermosensitive color developing layer, and an adhesive layer over an opposite surface of the support, the linerless thermosensitive recording sheet being wound in roll shape in a manner that the adhesive layer comes to an internal side of the support, wherein a peel force for peeling the linerless thermosensitive recording sheet from the roll is 50 mN/50 mm or greater but 250 mN/50 mm or less, wherein a water content of the linerless thermosensitive recording sheet is 4.5% or higher but 6.5% or lower, the roll of the linerless thermosensitive recording sheet being seal-packaged in the linerless thermosensitive recording body package.Type: GrantFiled: March 12, 2018Date of Patent: June 29, 2021Assignee: Ricoh Company, Ltd.Inventors: Tohru Kitano, Tomohisa Kakuda, Hiroaki Matsui
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Publication number: 20200023663Abstract: Provided is a linerless thermosensitive recording body package, a roll of a linerless thermosensitive recording sheet being packaged in the linerless thermosensitive recording body package, the linerless thermosensitive recording sheet including a support, a thermosensitive color developing layer over one surface of the support, a release layer over the thermosensitive color developing layer, and an adhesive layer over an opposite surface of the support, the linerless thermosensitive recording sheet being wound in roll shape in a manner that the adhesive layer comes to an internal side of the support, wherein a peel force for peeling the linerless thermosensitive recording sheet from the roll is 50 mN/50 mm or greater but 250 mN/50 mm or less, wherein a water content of the linerless thermosensitive recording sheet is 4.5% or higher but 6.5% or lower, the roll of the linerless thermosensitive recording sheet being seal-packaged in the linerless thermosensitive recording body package.Type: ApplicationFiled: March 12, 2018Publication date: January 23, 2020Inventors: Tohru KITANO, Tomohisa KAKUDA, Hiroaki MATSUI
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Patent number: 8268746Abstract: Provided is a thermosensitive recording material which can be produced through high-speed coating, which is excellent in head-matching property, and which can provide a printed image having good waterproofness, while maintaining high sensitivity and high storage stability, which material includes a support, an under layer laid over the support, the under layer containing a plastic hollow particle, a thermosensitive color-developing layer laid over the under layer, the thermosensitive color-developing layer containing a leuco dye and a developer, wherein two or more layers including the thermosensitive color-developing layer are formed through simultaneous coating by a curtain coating method.Type: GrantFiled: September 9, 2009Date of Patent: September 18, 2012Assignee: Ricoh Company, Ltd.Inventors: Motoi Orihara, Tomohisa Kakuda, Yoshiaki Matsunaga, Eiji Fukui
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Publication number: 20100062936Abstract: Provided is a thermosensitive recording material which can be produced through high-speed coating, which is excellent in head-matching property, and which can provide a printed image having good waterproofness, while maintaining high sensitivity and high storage stability, which material includes a support, an under layer laid over the support, the under layer containing a plastic hollow particle, a thermosensitive color-developing layer laid over the under layer, the thermosensitive color-developing layer containing a leuco dye and a developer, wherein two or more layers including the thermosensitive color-developing layer are formed through simultaneous coating by a curtain coating method.Type: ApplicationFiled: September 9, 2009Publication date: March 11, 2010Applicant: RICOH COMPANY, LTD.Inventors: Motoi Orihara, Tomohisa Kakuda, Yoshiaki Matsunaga, Eiji Fukui
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Patent number: 6660688Abstract: A thermosensitive recording medium including; a support; and a thermosensitive recording layer formed overlying the support and including a leuco dye, a color developer and a sensitizer, wherein the color developer includes a compound selected from the group consisting of compounds having one of the following formulae (1), (2) and (3): methylenebis(2-naphthol); and condensation products of a polyhydric alcohol component including a polyhydric alcohol having three or more hydroxyl groups with a carboxylic acid component including a 4-hydroxybenzoic acid compound having the following formula (4): wherein m is 0 or an integer of from 1 to 2, and wherein the sensitizer includes 4-acetylbiphenyl.Type: GrantFiled: May 30, 2001Date of Patent: December 9, 2003Assignee: Ricoh Company Ltd.Inventors: Hiroshi Yamada, Tomohisa Kakuda, Takeshi Kajikawa
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Patent number: 6593272Abstract: A thermosensitive recording composition includes a leuco dye, a color developer containing 4,4′-bisphenol S, and a sensitizer containing 4-acetylbiphenyl. A thermosensitive recording material has a support and a thermosensitive recording layer which is provided on the support and contains the above-mentioned thermosensitive recording composition.Type: GrantFiled: December 1, 2000Date of Patent: July 15, 2003Assignee: Ricoh Company, Ltd.Inventors: Tomohisa Kakuda, Takeshi Kajikawa, Hiroshi Yamada
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Publication number: 20020010095Abstract: A thermosensitive recording medium including; a support; and a thermosensitive recording layer formed overlying the support and including a leuco dye, a color developer and a sensitizer, wherein the color developer includes a compound selected from the group consisting of compounds having one of the following formulae (1), (2) and (3): 1Type: ApplicationFiled: May 30, 2001Publication date: January 24, 2002Applicant: RICOH COMPANY, LTDInventors: Hiroshi Yamada, Tomohisa Kakuda, Takeshi Kajikawa
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Publication number: 20010003729Abstract: A thermosensitive recording composition includes a leuco dye, a color developer containing 4,4′-bisphenol S, and a sensitizer containing 4-acetylbiphenyl. A thermosensitive recording material has a support and a thermosensitive recording layer which is provided on the support and contains the above-mentioned thermosensitive recording composition.Type: ApplicationFiled: December 1, 2000Publication date: June 14, 2001Inventors: Tomohisa Kakuda, Takeshi Kajikawa, Hiroshi Yamada
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Patent number: 5827590Abstract: A thermosensitive recording adhesive label sheet has a support, a thermosensitive recording layer provided on the front side of the support, containing a leuco dye serving as a coloring agent and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, a protective layer provided on the thermosensitive recording layer, containing a binder agent, a pigment and a lubricant, an adhesive layer provided on the back side of the support, opposite to the side of the thermosensitive recording layer with respect to the support, and a disposable backing sheet which is made from a neutral paper and attached to the adhesive layer; with the lubricant for use in the protective layer including an aliphatic acid metallic salt in an amount of 2 wt. % or less of the total solid content of the protective layer.Type: GrantFiled: September 20, 1996Date of Patent: October 27, 1998Assignee: Ricoh Company, Ltd.Inventors: Mitsunobu Morita, Tomohisa Kakuda, Norihiko Inaba, Shinobu Miyauchi, Mitsuru Naruse
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Patent number: 5158925Abstract: A thermosensitive recording material comprising a substrate and a thermosensitive coloring layer, formed thereon, which comprises a leuco dye; at least one color developer selected from the group consisting of 1,5-bis(4-hydroxyphenylthio)-3-oxapentane and 1,7-bis(4-hydroxyphenylthio)-3,5-dioxapentane; and an isocyanuric acid derivative of the formula (I): ##STR1## wherein R.sup.1, R.sup.3, R.sup.4 and R.sup.5 independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms, provided that at least either R.sup.1 or R.sup.3 represents an alkyl group having 1 to 4 carbon atoms; and R.sup.2 represents --C.sub.n H.sub.2n OH in which n is an integer of 0 to 4.Type: GrantFiled: October 9, 1990Date of Patent: October 27, 1992Assignee: Ricoh Company, Ltd.Inventor: Tomohisa Kakuda
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Patent number: 5116804Abstract: A thermosensitive recording material with a highly improved dynamic coloring sensitivity, comprising a support, and a coloring layer formed thereon, which comprises (a) a leuco dye, (b) at least one of 1,7-bis(4-hydroxphenylthio)-3,5-dioxahepetane and 1,5-bis(4-hydroxyphenylthio)-3-oxapentane as a color developer, and (c) a dibenzyl oxalate derivative having formula (I) as a sensitizer: ##STR1## wherein R.sup.1 and R.sup.2 each independently represent hydrogen, an alkyl group having 1 to 4 carbon atoms, a halogen or a hydroxyl group.Type: GrantFiled: May 30, 1990Date of Patent: May 26, 1992Assignee: Ricoh Company, Ltd.Inventors: Tomohisa Kakuda, Norio Kurisu
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Patent number: 4912079Abstract: A thermosensitive recording material is disclosed, which comprises a support, an intermediate layer having a voidage ranging from 50% to 95% and a thickness of 3 .mu.m to 100 .mu.m, and a thermosensitive coloring layer, which layers are successively formed on the intermediate layer.Type: GrantFiled: May 27, 1988Date of Patent: March 27, 1990Assignee: Ricoh Company, Ltd.Inventors: Kanjirou Kawasaki, Hiroaki Inoue, Tomohisa Kakuda, Yasutomo Mori