Patents by Inventor Yasuo Iwasa

Yasuo Iwasa 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).

  • Patent number: 7101826
    Abstract: An object of the present invention is to provide recording paper and label paper with excellent waterproof properties, reduced curling from heat when used as recording paper in a heat-fixing type electrophotographic printer, a heat-fixing type electrophotographic copier or a direct heat-sensitive printer, excellent paper delivery properties, and capable of providing continuous printing of multiple sheets. A further object of the invention is to provide recording paper and label paper with excellent waterproof properties as the base materials of masking seals and re-covering-preventing labels, and requiring no special process to start peeling. The present invention provides recording paper comprising resin film (A) containing a thermoplastic resin, and at least one of inorganic fine powder and an organic filler, wherein the heat of crystallization is 60 J/cm3 or lower, and label paper using the same.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: September 5, 2006
    Assignee: Yupo Corporation
    Inventors: Yasuo Iwasa, Masaaki Yamanaka
  • Publication number: 20060084014
    Abstract: A colour photographic material is disclosed comprising a black image forming coupler substituted in the 2, 4 and/or 6 position shown by formula (I) or formula (II), where in LINK represents a divalent linking group, BALL represents a group that prevents the coupler from diffusing away from the layer containing it. X and Y each represent a hydrogen atom or a coupling-off group capable of being released upon an oxidative coupling reaction with a developing agent. The material has a good colour reproduction and excellent light stability.
    Type: Application
    Filed: October 11, 2005
    Publication date: April 20, 2006
    Applicant: Fuji Photo Film B.V.
    Inventors: Huibert van Boxtel, Akira Kase, Yasuo Iwasa, Yuzo Toda
  • Publication number: 20060068338
    Abstract: The present invention relates to a silver halide color photographic light-sensitive material, in particular to a multilayer material which comprises a support provided with blue, green and red sensitive silver halide emulsion layers containing a yellow, a magenta and a cyan dye forming coupler, respectively. According to the present invention, a paper having characteristic curves of gamma as a function of the density is obtained by a color development of a light-sensitive material after digital exposure.
    Type: Application
    Filed: September 13, 2005
    Publication date: March 30, 2006
    Applicant: Fuji Photo Film B.V.
    Inventors: Meindert Slagt, Akira Kase, Peter Franciscus Van Asten, Yasuo Iwasa
  • Publication number: 20060014004
    Abstract: An electrophotographic film with excellent water resistance, which is more reduced in heat curling than before when used as a recording paper for thermal fixing-type electrophotographic printers or a copying machines and prevents stains of the toner-fixing unit if it jams in the printer or copying machine and which can provide continuous printing of a large number of sheets, is provided by an electrophotographic film comprising a resin film (A) formed of a resin composition containing an inorganic fine powder and/or an organic filler, the resin composition having a melt tension of 5 g or more at 210° C., a crystallization temperature of 120° C. or more and a crystallization heat of 60 J/cm3 or less.
    Type: Application
    Filed: June 27, 2005
    Publication date: January 19, 2006
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Masaaki Yamanaka
  • Patent number: 6984423
    Abstract: The present invention provides less expensive ink jet recording papers having high glossiness and high durability and being capable of quickly absorbing inks without causing bleeding. Accordingly, the present invention provides an ink jet recording paper having an ink-receiving layer provided on a porous resin film, wherein the porous resin film has a liquid absorption capacity measured in accordance with “Japan TAPPI No.51-87” of 0.5 ml/m2 or above and the ink-receiving layer has a surface glossiness (JIS-Z8741: measuring method at 60°) of 40% or above. It is preferable that the ink jet recording paper contains at least one member selected from among alumina, alumina hydrate and amorphous silica in the ink-receiving layer.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: January 10, 2006
    Assignee: Yupo Corporation
    Inventors: Seiichiro Iida, Yasuo Iwasa
  • Publication number: 20050276943
    Abstract: Disclosed is an in-mold labeled thermoplastic resin container specifically so designed that the ratio of the product A of the Gurley stiffness (m·kgf) and the 3% elongation load (kgf) of the label-edge part of the labeled area thereof to the product B of the Gurley stiffness and the 3% elongation load of the label-surrounding part of the non-labeled area thereof, A/B, is at most 0.6. The container has good drop impact fracture resistance and has good producibility, and it is lightweight.
    Type: Application
    Filed: December 30, 2004
    Publication date: December 15, 2005
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Takatoshi Nishizawa
  • Patent number: 6911253
    Abstract: A porous resin film which comprises 30 to 90 wt % of a thermoplastic resin containing a hydrophilic thermoplastic resin component; and 70 to 10 wt % of an inorganic or organic fine powder was disclosed. The porous resin film of the present invention is valuable as an ink-jet recording medium since the film shows excellent ink absorbing and drying properties even when a large amount of ink is discharged thereon, and thus can produce thereon a high-definition image.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: June 28, 2005
    Assignee: Yupo Corporation
    Inventors: Yasuo Iwasa, Akihiko Ohno, Nobuhiro Shibuya
  • Publication number: 20050048271
    Abstract: An object of the present invention is to provide recording paper and label paper with excellent waterproof properties, reduced curling from heat when used as recording paper in a heat-fixing type electrophotographic printer, a heat-fixing type electrophotographic copier or a direct heat-sensitive printer, excellent paper delivery properties, and capable of providing continuous printing of multiple sheets. A further object of the invention is to provide recording paper and label paper with excellent waterproof properties as the base materials of masking seals and re-covering-preventing labels, and requiring no special process to start peeling. The present invention provides recording paper comprising resin film (A) containing a thermoplastic resin, and at least one of inorganic fine powder and an organic filler, wherein the heat of crystallization is 60 J/cm3 or lower, and label paper using the same.
    Type: Application
    Filed: September 16, 2004
    Publication date: March 3, 2005
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Masaaki Yamanaka
  • Patent number: 6811837
    Abstract: The invention provides a porous resin film having a good absorption of water content as a solvent for aqueous ink or aqueous paste and a recording medium comprising the porous resin film. The recording medium is characterized by the capability of absorbing an ink without density unevenness even during ink jet recording if the ejected amount of ink is great. The invention lies in a porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and an inorganic and/or organic finely divided powder in an amount of 10 to 70% by weight, wherein the inorganic and/or organic finely divided powder is surface-treated with a surface treating agent (A) made of a copolymer of diallylamine salt or alkyl diallylamine salt (a1) with a nonionic hydrophilic vinyl monomer (a2) and an anionic surface treating agent (B), and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m2 as measured by “Japan TAPPI No. 51-87”.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: November 2, 2004
    Assignee: Yupo Corporation
    Inventors: Yasuo Iwasa, Seiichiro Iida, Nobuhiro Shibuya
  • Publication number: 20030118790
    Abstract: The present invention provides less expensive ink jet recording papers having high glossiness and high durability and being capable of quickly absorbing inks without causing bleeding.
    Type: Application
    Filed: September 16, 2002
    Publication date: June 26, 2003
    Applicant: YUPO CORPORATION
    Inventors: Seiichiro IIda, Yasuo Iwasa
  • Publication number: 20030071884
    Abstract: The invention provides a porous resin film having a good absorption of water content as a solvent for aqueous ink or aqueous paste and a recording medium comprising the porous resin film. The recording medium is characterized by the capability of absorbing an ink without density unevenness even during ink jet recording if the ejected amount of ink is great. The invention lies in a porous resin film comprising: a thermoplastic resin in an amount of 30 to 90% by weight; and an inorganic and/or organic finely divided powder in an amount of 10 to 70% by weight, wherein the inorganic and/or organic finely divided powder is surface-treated with a surface treating agent (A) made of a copolymer of diallylamine salt or alkyl diallylamine salt (a1) with a nonionic hydrophilic vinyl monomer (a2) and an anionic surface treating agent (B), and the porous resin film has a liquid absorption capacity of not smaller than 0.5 ml/m2 as measured by “Japan TAPPI No. 51-87”.
    Type: Application
    Filed: June 10, 2002
    Publication date: April 17, 2003
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Seiichiro Iida, Nobuhiro Shibuya
  • Publication number: 20030072935
    Abstract: A porous resin film containing a thermoplastic resin, an inorganic and/or organic finely divided powder and a hydrophilicizer, and having a liquid absorption capacity of not smaller than 0.5 ml/m2 may be incorporated in a recording medium to provide good absorption of water present as a solvent for aqueous ink or aqueous paste and ink absorption without density unevenness during solid printing of large amounts of ink during ink jet recording.
    Type: Application
    Filed: June 3, 2002
    Publication date: April 17, 2003
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Seiichiro Iida, Nobuhiro Shibuya
  • Publication number: 20030017321
    Abstract: The present invention provides (1) a porous resin film having good water absorption from aqueous inks or aqueous pastes, (2) a recording medium which can absorb an ink without density unevenness even during solid printing or the like if the ejected amount of ink is great in ink jet recording, and (3) a porous resin film constituting such a recording medium having excellent properties. In other words, the present invention lies in a porous resin film comprising a thermoplastic resin and an inorganic and/or organic finely divided powder surface-treated with a specific surface treating agent and having a liquid absorption capacity of not smaller than 0.5 ml/m2 as measured by “Japan TAPPI No. 51-87” and a recording medium comprising the porous resin film.
    Type: Application
    Filed: June 7, 2002
    Publication date: January 23, 2003
    Applicant: YUPO CORPORATION
    Inventors: Yasuo Iwasa, Seiichiro Iida, Nobuhiro Shibuya
  • Publication number: 20020028320
    Abstract: A porous resin film which is obtained from a compound prepared by kneading a composition comprising 30 to 100% by weight of a thermoplastic resin comprising a hydrophilic thermoplastic resin and 0 to 70% by weight of an inorganic and/or an organic powder in an intermeshing twin-screw extruder at a screw shear rate of 300 sec−1 or higher and which has a liquid absorbing capacity of 0.5 ml/m2 or more as measured in accordance with the method specified in Japan TAPPI Standard No. 51-87.
    Type: Application
    Filed: April 25, 2001
    Publication date: March 7, 2002
    Inventors: Yasuo Iwasa, Shigekazu Oi
  • Publication number: 20020012786
    Abstract: A porous resin film which comprises 30 to 90 wt % of a thermoplastic resin containing a hydrophilic thermoplastic resin component; and 70 to 10 wt % of an inorganic or organic fine powder was disclosed. The porous resin film of the present invention is valuable as an ink-jet recording medium since the film shows excellent ink absorbing and drying properties even when a large amount of ink is discharged thereon, and thus can produce thereon a high-definition image.
    Type: Application
    Filed: April 12, 2001
    Publication date: January 31, 2002
    Applicant: Yupo corporation
    Inventors: Yasuo Iwasa, Akihiko Ohno, Nobuhiro Shibuya
  • Patent number: 5871829
    Abstract: The present invention provides a novel pressure-sensitive adhesive label which curls little even under the coldest conditions and which has as a surface material a microporous stretched resin film obtained by stretching a crystalline polyolefin resin film containing an inorganic fine powder, a pressure-sensitive adhesive layer provided on one side of the surface material and a release paper provided on the pressure-sensitive adhesive layer, where the microporous stretched resin film satisfies the following physical properties (1) and (2):(1) the linear thermal expansion coefficient in a machine direction at -10.degree. C. (JIS K-7197) is from 10 to 70 .mu.m/m.multidot..degree.C.; and(2) the linear thermal expansion coefficient in the machine direction at 0.degree. C. is from 10 to 75 .mu.m/m.multidot..degree.C.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: February 16, 1999
    Assignee: Oji-Yuka Synthetic Paper Co., Ltd.
    Inventors: Takatoshi Nishizawa, Yasuo Iwasa, Akihiko Ohno
  • Patent number: 4755455
    Abstract: Siliver halide color photographic materials are disclosed which have high color-reproducibility and high color image-fastness and which are substantially free from variation with respect to sensitivity, gradation or color density as caused by variation of various factors in the development of the materials such as variation of the composition of the treating solution, the treating time or the treating temperature.The present silver halide color photographic materials have at least one silver halide emulsion layer on a support and are characterized in that silver halide grains contained in the emulsion layer comprise silver bromide or silver bromochloride, about 50% or more of the total projected area of said silver halide grains are composed of tabular grains having an average aspect ratio of about 5 or more particularly 5 to 8, and the emulsion layer further contains at least one pyrazoloazole-type magenta coupler represented by general formula (I): ##STR1## wherein R.sup.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: July 5, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasuo Iwasa
  • Patent number: 4554246
    Abstract: A photographic silver halide light-sensitive material is described. The material includes at least one of the compounds represented by general formula (I) as described below, their salts, and their precursors releasing the compounds of general formula (I) on cleavage under alkali conditions. ##STR1## (the symbols are as defined in the appended claims). This light-sensitive material is less subject to a variation in photographic performance during the storage, in particular, the formation of fog is prevented.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: November 19, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyohiko Yamamuro, Yasuo Iwasa, Isamu Itoh
  • Patent number: 4524130
    Abstract: A silver halide color photographic light-sensitive material is disclosed. The material is comprised of a support base having a plurality of silver halide emulsion layers positioned thereon. The material includes at least one silver halide emulsion layer having a particular sensitivity and color sensitivity, and a second silver halide emulsion layer having the same color sensitivity but having a greater sensitivity with respect to light, the second layer including a silver halide having a silver iodide content in the range of 9% by mol to 15% by mol. The material includes a DIR compound in a layer other than the second silver halide emulsion layer. The DIR compound releases a diffusible development inhibitor or precursor thereof by a coupling reaction. The resulting material has greatly improved granularity and sharpness.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: June 18, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuo Iwasa, Shingo Ishimaru
  • Patent number: 4508816
    Abstract: An improved method for bleaching color photosensitive materials with a persulfate is provided. This method is free of offensive odors, can bleach efficiently color photosensitive materials containing a large amount of silver by using a persulfate, and can effectively bleach color photosensitive materials having colloidal silver layers by using a persulfate. The color photosensitive material used in the present invention contains at least one of the compounds represented by the formula I, salts thereof and precursors thereof: ##STR1## where R.sup.1 and R.sup.2 each independently represents a hydrogen atom, or an aliphatic residue and R.sup.1 and R.sup.2 may form a ring together with the N atom; R.sup.3 represents --R.sup.4 -- or --R.sup.4 --S, said --R.sup.4 -- being a divalent aliphatic residue; and X represents a divalent heterocyclic ring residue containing at least one atom selected from the group consisting of a nitrogen atom, an oxygen atom, and a sulfur atom.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: April 2, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyohiko Yamamuro, Shigeo Hirano, Isamu Itoh, Yasuo Iwasa