Patents by Inventor Kunio Hayakawa
Kunio Hayakawa 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: 6180560Abstract: A thermosensitive recording material has a support and a thermosensitive coloring layer formed thereon containing a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer including at least one compound (A) having in a molecule thereof at least two aromatic ring moieties with specific structures, selected from the group consisting of an aromatic ring moiety having at least one carboxyl group and electron-attracting functional group, an aromatic ring moiety having at least one carboxyl group and electron-donating functional group, and an aromatic ring moiety having at least one carboxyl group, free of the electron-attracting and electron-donating functional groups. An aromatic carboxylic acid compound serving as the above-mentioned compound (A) and the producing method thereof are also disclosed.Type: GrantFiled: August 14, 1998Date of Patent: January 30, 2001Assignee: Ricoh Company, Ltd.Inventors: Kunio Hayakawa, Mitsunobu Morita
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Patent number: 6123313Abstract: A seismic isolation apparatus is structured such that a pair of seismic isolation mechanisms are formed each having a pair of upper and lower clamping members formed in the shape of a rectangular frame, wherein upper and lower roller guide surfaces, in each of which a longitudinal central portion is formed as a concavely arcuate curved surface and portions respectively extending therefrom are formed as convexly arcuate curved surfaces, are formed on the four sides of the upper and lower clamping members, and wherein rollers each having a circular cross section are respectively interposed between the upper and lower roller guide surfaces. The pair of seismic isolation mechanisms are installed by being superposed on top of each other such that the rolling directions of the rollers in the two seismic isolation mechanisms are perpendicular to each other.Type: GrantFiled: June 22, 1998Date of Patent: September 26, 2000Assignees: Okumura Corporation, Oiles CorporationInventors: Susumu Otsuka, Kunio Hayakawa, Ikuo Shimoda, Kiyoharu Suzuki, Masami Mochimaru, Mitsuru Miyazaki
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Patent number: 5945517Abstract: Proposed is a positive- or negative-working chemical-sensitization photoresist composition having advantages in respect of the contrast and resolution of patterning, photo-sensitivity and cross sectional profile of the patterned resist layer as well as in respect of stability of the latent image formed by pattern-wise exposure to light before post-exposure baking treatment. The composition comprises: (A) 100 parts by weight of a film-forming resinous ingredient which causes a change, i.e. increase or decrease, of solubility in an aqueous alkaline solution by the interaction with an acid; and (B) from 0.5 to 20 parts by weight of a radiation-sensitive acid-generating agent which is a diazomethane compound represented by the general formulaR.sup.1 --SO.sub.2 --C(=N.sub.2)--SO.sub.2 --R.sup.2,in which R.sup.1 and R.sup.2 are each, independently from the other, a monovalent cyclic group substituted on the cyclic nucleus by an acid-dissociable group such as a tert-butoxycarbonyl and acetal groups.Type: GrantFiled: July 21, 1998Date of Patent: August 31, 1999Assignees: Tokyo Ohka Kogyo Co., Ltd., Daito Chemix CorporationInventors: Kazuyuki Nitta, Kazufumi Sato, Toshiharu Shimamaki, Kunio Hayakawa, Shin-ya Kuramoto
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Patent number: 5913503Abstract: An aseismatic mount for exhibition of articles comprising a lower mount frame, a middle mount frame, an upper mount frame for mounting exhibition articles thereon, aseismatic mount having rollers integrally on an axis each of which is shifted eccentrically to each other in up and down directions, said aseismatic mounts being interposed between the lower mount frame and the middle mount frame at plural positions, and further aseismatic mounts having the same construction as the aseismatic mounts, and interposed between the middle mount frame and the upper mount frame.Type: GrantFiled: May 16, 1997Date of Patent: June 22, 1999Assignees: Kabushiki Kaisha Okumuragumi, Oiresu Kogyo Kabushiki KaishaInventors: Yukio Satoh, Susumu Otsuka, Kunihiko Andoh, Kunio Hayakawa
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Patent number: 5722029Abstract: In an image forming apparatus, the size of sheets (ordinary sheets) set on any tray not set as a tab tray by tab tray setting member is determined by ordinary sheet size sensing member on the basis of the dimension in the sheet feed direction and the dimension in the direction (widthwise) perpendicular to the above direction. On the other hand, the size of sheets (sheets with tabs) set on a tray set as a tab tray is determined by tab sheet size sensing member on the basis only of the dimension in the widthwise direction. If the size of the sheets of the tab tray cannot be determined on the basis only of the above dimension, the size set beforehand is selected. With this configuration, the apparatus is capable of detecting the sizes of various kinds of tab sheets with accuracy.Type: GrantFiled: October 23, 1996Date of Patent: February 24, 1998Assignee: Ricoh Company, Ltd.Inventors: Nobuaki Tomidokoro, Masami Higuchi, Kunio Hayakawa, Youko Fukui, You Masuyama, Ryoichi Suzuki
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Patent number: 5515171Abstract: A remote-controlled copying apparatus includes a main copying part, a storage unit for storing image signals from the main copying part, a facsimile part connected to a first telephone line for receiving image signals from an external facsimile unit and for transmitting the image signals of the storage unit to an external facsimile unit, a facsimile control part connected to a second telephone line for receiving a first tone signal from an external telephone unit after a ringing signal is received from the external telephone unit, and for repeatedly transmitting a set of control signals to the external telephone unit in response to the first tone signal, a first conversion part for converting a tone signal into a control signal so that the control signal is transmitted to the external telephone unit, a second conversion part for converting a control signal into a tone signal, and a control part for carrying out a remote control operation of the copying apparatus by controlling the facsimile control part in acType: GrantFiled: February 25, 1993Date of Patent: May 7, 1996Assignee: Ricoh Company, Ltd.Inventors: Wataru Nara, Midori Aida, Hajime Hojo, Kunio Hayakawa, Yutaka Hasegawa
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Patent number: 5489501Abstract: A recording material contains at least two coordination compounds which react to produce at least one newly produced coordination compound with the occurrence of visual changes in the recording material, which visual changes are utilized for recording.Type: GrantFiled: October 18, 1994Date of Patent: February 6, 1996Assignee: Ricoh Company, Ltd.Inventors: Masafumi Torii, Kunio Hayakawa
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Patent number: 5478600Abstract: An Al-Zn-Si base alloy coat including an Al-Zn-Si-Fe alloy layer which has remarkable high corrosion resistance is formed on an article. A ferrous base material is used as the article to provide Fe to the alloy layer. The alloy layer of the present invention consists of 55 to 65 wt % of Al, 25 to 35 wt % of Zn, 5 to 10 wt % of Fe, and 2 to 4 wt % of Si, and also has a cross sectional area of 15 to 90% of the entire cross sectional area of the alloy coat. A process for forming the alloy coat of the present invention comprises the step of dipping the article into a molten bath of Zn to form, on the article, an undercoat which results from a reaction between Fe of the article and Zn in the molten bath, and then dipping the undercoat into an alloy molten bath of Al, Zn and Si to form the alloy coat of the present invention on the undercoat.Type: GrantFiled: February 23, 1995Date of Patent: December 26, 1995Assignees: Daido Steel Sheet Corporation, S-TEM Ltd.Inventors: Masanori Takeda, Youichiro Suzuki, Kunio Hayakawa
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Patent number: 5447900Abstract: A thermosensitive recording material having a support and a thermosensitive coloring layer which is formed on the support and contains a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer including one compound with an acid dissociation constant (pKa) of 7.0 or less in a mixed solvent of water and methanol with a volume ratio of 1:1.Type: GrantFiled: September 15, 1994Date of Patent: September 5, 1995Assignee: Ricoh Company, Ltd.Inventors: Hideo Suzaki, Keishi Taniguchi, Kunio Hayakawa, Hiromi Furuya
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Patent number: 5446011Abstract: A thermosensitive recording material capable of being imagewise colored when heated, having a support, and a thermosensitive recording layer formed thereon which contains an N-substituted indole or an aromatic polyhydroxy compound, a carbonyl compound, and an acid material.Type: GrantFiled: April 29, 1994Date of Patent: August 29, 1995Assignee: Ricoh Company, Ltd.Inventors: Kunio Hayakawa, Masafumi Torii
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Patent number: 5308710Abstract: An Al-Zn-Si base alloy coat including an Al-Zn-Si-Fe alloy layer which has remarkable high corrosion resistance is formed on an article. A ferrous base material is used as the article to provide Fe to the alloy layer. The alloy layer of the present invention consists of 55 to 65 wt % of Al, 25 to 35 wt % of Zn, 5 to 10 wt % of Fe, and 2 to 4 wt % of Si, and also has a cross sectional area of 15 to 90% of the entire cross sectional area of the alloy coat. A process for forming the alloy coat of the present invention comprises the step of dipping the article into a molten bath of Zn to form, on the article, an undercoat which results from a reaction between Fe of the article and Zn in the molten bath, and then dipping the undercoat into an alloy molten bath of Al, Zn and Si to form the alloy coat of the present invention on the undercoat.Type: GrantFiled: October 8, 1992Date of Patent: May 3, 1994Assignees: Daido Steel Sheet Corp., S-Tem Ltd.Inventors: Masanori Takeda, Youichiro Suzuki, Kunio Hayakawa
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Patent number: 5306687Abstract: A thermosensitive recording material composed of a support, and a thermosensitive recording layer formed on the support, containing a leuco dye, a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, and a thermofusible material including p'-methylphenyl p-chlorobenzoate serving as a thermosensitivity-improving agent.Type: GrantFiled: April 16, 1993Date of Patent: April 26, 1994Assignee: Ricoh Company, Ltd.Inventors: Hiromi Furuya, Keishi Taniguchi, Kunio Hayakawa, Masafumi Torii, Shoji Maruyama, Keishi Kubo
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Patent number: 5126486Abstract: A phenolic compound having formula (I): ##STR1## wherein X represents a chlorine atom or a methyl group, and a recording material comprising a coloress or light-colored leuco dye and the above phenolic compound serving as a color developer for the leuco dye are disclosed.Type: GrantFiled: October 17, 1990Date of Patent: June 30, 1992Assignee: Ricoh Company, Ltd.Inventors: Hiromi Furuya, Kunio Hayakawa
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Patent number: 5024699Abstract: A leuco dye having the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a lower alkyl group; R.sup.5 represents an .alpha.-naphthyl group, .beta.-naphthyl group or ##STR2## wherein R.sup.6 represents --NHCOR.sup.9, a halogen or an amino group which is unsubstituted or substituted by one or two C.sub.1 -C.sub.4 alkyl groups which are the same or different; and R.sup.7, R.sup.8 and R.sup.9 each represent hydrogen or a lower alkyl group, provided that when both R.sup.7 and R.sup.8 are hydrogen, R.sup.6 represents --NHCOR.sup.9 or bromine.These dyes absorb in the near-infrared region and yield colored images with a color developer therefor with excellent preservability.Type: GrantFiled: March 2, 1990Date of Patent: June 18, 1991Assignee: Ricoh Company, Ltd.Inventors: Kiyotaka Iiyama, Kunio Hayakawa, Masahiro Nakata, Kaoru Kodera, Osamu Miyazaki
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Patent number: 4985345Abstract: A recording material employing at least one leuco dye having formula (I), which is colored when brought into contact with a color developer capable of inducing color formation in the leuco dye: ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, an unsubstituted or substituted aralkyl group, or an unsubstituted or substituted aryl group, which R.sup.1 and R.sup.2 may form a ring in combination or a morpholine ring through an oxygen atom; R.sup.3 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or an aralkyloxy group; R.sup.4 and R.sup.5 each represent an alkyl group having 1 to 4 carbon atoms; and R.sup.6 represents hydrogen, an alkyl group having 1 to 4 carbon atoms or a halogen.Type: GrantFiled: January 22, 1990Date of Patent: January 15, 1991Assignee: Ricoh Company, Ltd.Inventors: Kunio Hayakawa, Hiromi Furuya, Hisanori Shimada, Masahiro Nakata, Kaoru Kodera, Kouji Oohara, Nobuo Akagi
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Patent number: 4981970Abstract: Coloring phthalide compounds having general formula [I], a method of producing the phthalide compounds and a recording material comprising as a coloring component any of the coloring phthalide compounds, are disclosed, ##STR1## wherein R.sup.1 and R.sup.2 each represent a straight chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, or a benzyl group, and R.sup.1 and R.sup.2 in combination may form a ring; R.sup.3 represents and alkyl group having 1 to 4 carbon atoms; R.sup.4 represents a dialkylamino group having 1 to 6 carbon atoms, a cyclic amino group or halogen; l is an integer of 0 to 4; A represents ##STR2## wherein R.sup.5 and R.sup.6 each represent a straight chain or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, or a benzyl group, R.sup.5 and R.sup.6 in combination may form a ring; and B is the same as A, or represents a phenyl group which may have a substituent.Type: GrantFiled: August 16, 1989Date of Patent: January 1, 1991Assignee: Ricoh Company, Ltd.Inventors: Kiyotaka Iiyama, Kunio Hayakawa
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Patent number: 4978651Abstract: A phenolic compound having formula (I): ##STR1## wherein X represents a chlorine atom or a methyl group, and a recording material comprising a coloress or light-colored leuco dye and the above phenolic compound serving as a color developer for the leuco dye are disclosed.Type: GrantFiled: June 21, 1989Date of Patent: December 18, 1990Assignee: Ricoh Company, Ltd.Inventors: Hiromi Furuya, Kunio Hayakawa
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Patent number: 4940691Abstract: Coloring phthalide compounds having general formula [I] ##STR1## R.sup.1 represents hydrogen, an alkyl group, or halogen, m is an integer of 1 to 4, when m is 1, R.sup.2 represents hydrogen, an amino group, an alkylamino group, a dialkylamino group, a cyclic amino group, an alkyl group, or halogen, when m is 2 to 4, R.sup.2 represents halogen, R.sup.3 and R.sup.4 each represent a straight chain or branched alkyl group having 1 to 8 carbon atoms, a cyclic alkyl group, or a benzyl group, and R.sup.5 represents hydrogen, an alkyl group or an alkoxyl group; and a thermosensitive recording material including a thermosensitive recording layer comprising any of the above coloring phthalides and a color developer capable of inducing color formation in the phthalide compound are disclosed.Type: GrantFiled: May 19, 1989Date of Patent: July 10, 1990Assignee: Ricoh Company, Ltd.Inventors: Kiyotaka Iiyama, Kunio Hayakawa
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Patent number: 4925828Abstract: A leuco dye having the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a lower alkyl group; R.sup.5 represents an .alpha.-naphthyl group, .beta.-naphthyl group or ##STR2## wherein R.sup.6 represents --NHCOR.sup.9, a halogen or an amino group which is unsubstituted or substituted by one or two C.sub.1 -C.sub.4 alkyl groups which are the same or different; and R.sup.7, R.sup.8 and R.sup.9 each represent hydrogen or a lower alkyl group, provided that when both R.sup.7 and R.sup.8 are hydrogen, R.sup.6 represents --NHCOR.sup.9 or bromine.These dyes absorb in the near-infrared region and yield colored images with a color developer therefor with excellent preservability.Type: GrantFiled: May 31, 1988Date of Patent: May 15, 1990Assignee: Ricoh Company, Ltd.Inventors: Kiyotaka Iiyama, Kunio Hayakawa, Masahiro Nakata, Kaoru Kodera, Osamu Miyazaki
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Patent number: 4880762Abstract: Coloring phthalide compounds having general formula [I], a method of producing the phthalide compounds and a recording material comprising as a coloring component any of the coloring phthalide compounds are disclosed, ##STR1## wherein R.sup.1 and R.sup.2 each represent a straight chain or branched alkyl group having 1 to 6 carbon atoms, a cycloalkyl group, or a benzyl group, and R.sup.1 and R.sup.2 in combination may form a ring; R.sup.3 represents an alkyl group having 1 to 4 carbon atoms; R.sup.4 represents a dialkylamino group having 1 to 6 carbon atoms, a cyclic amino group or halogen, l is an integer of 0 to 4; A represents ##STR2## wherein R.sup.5 and R.sup.6 each represent a straight chain or branched alkyl group having 1 to 8 carbon atoms, a cycloalkyl group, or a benzyl group, R.sup.5 and R.sup.6 in combination may form a ring; and B is the same as A, or represents a phenyl group which may have a substituent.Type: GrantFiled: November 20, 1987Date of Patent: November 14, 1989Assignee: Ricoh Company, Ltd.Inventors: Kiyotaka Iiyama, Kunio Hayakawa