Patents by Inventor Mutsuo Akao

Mutsuo Akao 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: 4915229
    Abstract: A sheet film package comprises a casing, a stack of sheet films stored in said casing, and a protective board disposed in said for protecting said sheet films. The protective board has a holder portion integrally joined to one side edge of an upper panel and/or a lower panel thereof for preventing the sheet films from being displaced in a direction transverse to the direction in which the sheet films wil be fed out. The sheet film package also includes a buffer sheet member disposed on the lower panel of the protective board for placing the sheet films on the buffer sheet member. The buffer sheet member has at least one opening such as a hole or a slit for leaking suction air in each of two symmetrical areas of the buffer sheet member, one of which will be contacted by a suction cup of a film delivery mechanism disposed in a device in which the sheet film package can be loaded. The buffer sheet member has a foamed sheet layer made of thermoplastic resin.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: April 10, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Sadami Yamada, Mutsuo Akao
  • Patent number: 4906517
    Abstract: The packaging materials for photosensitive materials having particular coextruded multilayers and a flexible sheet.According to the composition, the packaging material is excellent in curl resistance, in physical strength particularly tear strength or in tearability by hand. These packaging materials have various properties necessary for packaging photosensitive materials, are excellent in bag-making ability for automatic bag-making machine.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: March 6, 1990
    Assignee: Fuji Photo Film Co.
    Inventors: Mutsuo Akao, Takuichi Komatsu
  • Patent number: 4903834
    Abstract: A package for diazo thermosensitive recording materials coiled round a core, which comprises a packaging paper being a water vapor permeability of more than 50 g/m.sup.2.24 hours and comprising a light-reflecting paper layer located as outer layer and a light-shielding paper layer located as inner layer.In the package of the invention, the packaging paper shields the recording material from the external heat and light. When internal humidity is increased such as by heating of the package such as higher than 50.degree. C., moisture passes through the packaging paper to the outside. Accordingly, fogging by precoupling of the packaged diazo thermosensitive recording materials, irrespective of the fixation type or not, is remarkably decreased, and the quality of the recording material can be maintained for a long period during storage.
    Type: Grant
    Filed: March 5, 1987
    Date of Patent: February 27, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Kotaro Nakamura, Takao Hayashi
  • Patent number: 4894264
    Abstract: A single-sheet gusset bag for photographic photosensitive materials formed of a laminated sheet comprising a metal foil layer or metallized flexible sheet layer, a water-absorptive, and heat-resistant flexible sheet layer which resists dust formation laminated on the outside of said metal foil layer or metallized flexible sheet layer, and a light-shielding polyolefin resin film layer containing at least linear low density polyethylene resin, carbon black and an antioxidant and having a thickness of more than 50 .mu.m laminated on the inside of said metal foil layer or metallized flexible sheet layer, and the bottom seal portion is turned or rolled and fixed by an adhesive or adhesive tape.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: January 16, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Koji Inoue, Hiroyuki Osanai
  • Patent number: 4876125
    Abstract: A single-sheet gusset bag for photographic photosensitive materials comprising a laminated sheet of which the inner surface layer is a light-shielding polyolefin resin film layer and the outer surface layer is a heat-resistant flexible sheet layer, and having a botom seal portion fixed by a hot-melt adhesive having a softening point by ring and ball method of 75 to 115 C of which the coating amount in the center portion is less than the coating amount of the side portion.In the gusset bag of the invention, the bottom seal portion can be effectively sealed without incidence of fogging and uneven gloss caused by the heat of the hot-melt adhesive. Since the gusset bag is formed of a single sheet, packaging is readily achieved. The cost of the packaging material is also inexpensive.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: October 24, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Hiroyuki Osanai, Koji Inoue
  • Patent number: 4876129
    Abstract: A packaging material for photographic photosensitive materials which comprises a simultaneously coextruded multiple layer light-shielding film comprising the inner layer being a heat-sealing layer containing 30 to 99.49 wt. % of linear low density polyethylene resin, 0.5 to 10 wt. % of carbon black and 0.01 to 1 wt. % of a lubricant, having 0.12 to 0.37 of a statical friction coefficient and the outer layer formed of a thermoplastic resin having 0.19 or more of a statical friction coefficient which is greater than the above inner layer by 0.05 or more, and having 10 g/15 mm width or more of the binding strength between each layer of the coextruded multiple layer film. This coextruded multiple layer film may contain an intermediate layer formed of a thermoplastic resin.In the packaging material of the invention, the inner layer is excellent in light-shielding, insertion of products, antiblocking, antistatic property for frictional electrification, moisture proofness and gas barrier.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: October 24, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4871613
    Abstract: A packaging material which comprises a simultaneously coextruded film comprising a conductive ethylene-ethyl acrylate copolymer resin layer containing more than 50 wt.% of ethylene-ethyl acrylate copolymer resin of which content of ethyl acrylate is more than 6 wt.%, 7 to 20 wt.% of carbon black and 0.01 to 1 wt.% of a lubricant, and a polyolefin resin layer.The packaging material of the invention is superior in antistatic property, moistureproofness, light-shielding, tear strength, impact puncture strength, slipping character and heat sealing properties. Its production is easy because of superior moldability, and generations of blocking, fish eye and pin hole are rare. The packaging material of the invention can be made thinner than the conventional packaging material, and expensive metal foil is not necessary. Accordingly, this packaging material is inexpensive.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: October 3, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4844961
    Abstract: In a container for a photographic film cartridge having a body and a cap made of a high-pressure branched low-density polyethylene resin and fitted to said body, the improvement comprising that said polyethylene resin has a melt index of 10 to 50 g/10 minutes, a density of 0.920 to 0.935 g/cm.sup.3 and a molecular weight distribution of 3.3 to 8.5 and contains 0.01 to 0.9 wt. % of a lubricant.This resin for the cap is excellent in fluidity, mold shrinkage, moldability, etc., and molding troubles and coloring troubles at molding remarkably decrease. The molding cycle is also shortened. The resin is particularly suitable for molding using a mold for many pieces at once.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: July 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4844787
    Abstract: A packaging bag for a sheet for electrophoresis comprising a polyethylene resin layer containing more than 50 wt. % of polyethylene resin having a density of 0.935 to 0.970 g/cm.sup.3 and a melt index of 0.1 to 1.5 g/10 minutes, the thickness of said polyethylene resin layer is 70 to 200 .mu.m, and haze of said bag is 15 to 95%.This packaging bag is excellent is moistureproofness capable of preserving the sheets for electrophoresis without deterioration of quality, and the sheets for electrophoresis can be inspected from the outside. This packaging bag has not the problem as the packaging material for the sheet for electrophoresis such as curling, insertion nor blocking, and it is inexpensive.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: July 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Takeshi Kato
  • Patent number: 4828106
    Abstract: In a packaging case for photosensitive sheet film comprising a light-shielding tray which receives a stack of said photosensitive sheet films and a light-shielding flexible cover sheet which is stuck in peelable state to seal the opening for taking out said stack, the improvement comprising that said tray is made of resin comprising 50 to 90 wt. % of a propylene-.alpha.-olefin copolymer resin having a melt index of higher than 18 g/10 minutes, a bending elastic modulus of more than 9,000 kg/cm.sup.2 and a notched Izod impact strength of more than 2.0 kg cm/cm at 23.degree. C., 0.2 to 5.0 wt. % of carbon black and 9.8 to 49.8 wt. % of linear low density polyethylene resin.In the light-shielding tray of the invention, rigidity is secured by the propylene-.alpha.-olefin copolymer resin, and troubles caused by this copolymer resin such as mold shrinkage, warp and twist of the product are overcome and remarkable lowering of physical strength by blending carbon black are attained by incorporating the L-LDPE resin.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: May 9, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Kenji Tajima
  • Patent number: 4796823
    Abstract: A spool for a photographic film comprising 50 to 99.8 wt. % of polystyrene resin, 0.05 to 2.2 wt. % of dimethylpolysiloxane and/or modified dimethylpolysiloxane of which a part of methyl groups are substituted by carboxyalkyl groups, 0.5 to 6 wt. % of rubber and 0.05 to 3 wt. % of carbon black having a pH of 5 to 9 and a mean particle size of 10 to 120 m.mu., and the outer surface of the flange of the spool is made rough so that the reflectance of the incident light at an incident angle of 75 degrees is less than 40% in the direction of regular reflection at an angle of 75 degrees.Static frictional coefficient of this spool against metal is small, and thereby photographic film can be drawn out of a photographic film cartridge smoothly to the last. Breakage of the perforations of photographic film does not occur. The outer surface of the flange of the spool is not glossy and its reflectance is low.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: January 10, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Hisao Endo, Toshio Sata, Masanori Ishiguro
  • Patent number: 4787506
    Abstract: A magazine for a roll of a photosensitive strip material which comprises a core rotatably supporting the roll and a light-shielding container body admitting the core and having an opening for drawing out the photosensitive strip material and light-shielding teremp cloth piece(s) provided at the above opening, and which is characterized in that the wall of the container body is formed by paper board and a multilayer film superposed thereon containing a metal foil layer or a metallized flexible sheet layer being visible from the outside and that the ground fabric structure of the above teremp cloth is knit structure.This magazine is superior in moistureproofness, gas barrier, dustproofness, thermal-shielding, water proofness and antistatic property. Deformation of the opening for drawing out hardly occurs, and leakage of light and moisture do not occur. Even though this magazine is left in the sunlight for a long time, inner temperature of the magazine is not so raised.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: November 29, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4784906
    Abstract: A packaging material for photographic photosensitive materials which comprises a simultaneously coextruded multilayer film layer comprising a light-absorptive light-shielding thermoplastic resin layer containing low-pressure linear low-density polyethylene resin, 0.1 to 15 wt. % of carbon black and 0.01 to 1 wt. % of a lubricant and being located as the inner layer and a light-reflective light-shielding thermoplastic resin layer being located as the outer layer.This packaging material is superior in tear strength, impact puncture strength, Gelbo test strength, tensile strength, light-shielding, prevention of temperature elevation at the inside of package under sunlight, moistureproofness, heat resistance, discrimination of right side - reverse side under a safe light, slipping character, heat sealing properties and printability.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: November 15, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4780357
    Abstract: A packaging material for photographic photosensitive materials which comprises a coextruded double layer film comprising a low-pressure linear low-density polyethylene resin layer located on heat sealing side and a polypropylene resin layer or a layer of a polyethylene resin of which density is 0.93 to 0.970 g/cm.sup.3 located on the other side, either of the above layers contains 0.5 to 30 g/m.sup.2 of metal powder or carbon black, and the above low-pressure linear low-density polyethylene resin layer contains 0.05 to 1% by weight of a lubricant.This packaging material is superior in tear strength, impact puncture strength, tensile strength, light-shielding, moisture proofing, slipping character and heat sealing ability. It is also suitable, for example, for packaging a small piece of photographic materials such as X-ray films for dental use.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: October 25, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4778712
    Abstract: A packaging film for photosensitive materials, which is a laminated film comprising at least three layers of an aluminum foil and two L-LDPE polyethylenic polymer layers laminated onto both sides of said aluminum foil, and in which:(a) said L-LDPE polyethylenic polymer layers contain 50% by weight or more of a low-pressure-processed, linear low-density polyethylene resin (L-LDPE),(b) at least one of said L-LDPE polyethylenic polymer layers contain at least 0.5% by weight of a light-shielding substance,(c) said two L-LDPE polyethylenic polymer layers, formed on both sides of said aluminum foil, have a thickness ratio of no higher than 50%, and(d) said laminated film has a moisture permeability of no higher than 10 g/m.sup.2 24 hr (40.degree. C. 90% RH). The light shielding substance is preferably carbon black.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: October 18, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4778713
    Abstract: A wrapping paper thermosensitive recording materials comprising a light-reflecting paper layer which is located as the outer surface layer and a light-shielding paper layer which is located on the inside therefrom and which is integrally combined with said light-reflecting paper layer.The wrapping paper of the invention shields from the external heat and light. When internal humidity is increased such as by heating of the package such as at higher than 50.degree. C., moisture passes through the wrapping paper to the outside. Accordingly, fogging by precoupling of the wrapped thermosensitive recording materials remarkably decreased, and quality of the recording material could be maintained for a long period during storage.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: October 18, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4730778
    Abstract: A container for a roll of a light-sensitive strip material having an opening for drawing out the light-sensitive strip material where teremp cloth is provided, which is characterized in that ground fabric structure of the teremp cloth is a knit structure and more than 20% of the pile yarns are looped.In the teremp cloth used for the container of the invention, each pile yarn winds around the warp or the weft of the ground fabric and fraying or falling out of pile yarn does not occur. Generation of pile yarn dust during manufacturing process is minor, and trouble with exposure and development caused by adhesion of pile yarn dust is solved even under high temperature and high humidity conditions.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: March 15, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mutsuo Akao, Yoshihiro Nishiyama
  • Patent number: 4708896
    Abstract: An easily openable packaging material for photographic photosensitive materials which comprises, a light-shielding heat-sealable film layer containing a lubricant, a light-shielding material and more than 50 wt. % of a high-pressure low-density polyethylene resin and being located as the inner layer, an aluminum foil layer which is laminated on the above heat-sealable film layer with a delamination resistance of greater than 400 g/15 mm width and on the heat-sealable film layer side of which an anchor coat layer is formed and, a heat-resistant flexible sheet layer which is laminated on the above aluminum foil layer and of which heat resistance is higher than the above heat-sealable film layer by 5.degree. C. or more.This packaging material can easily be torn by hand without a notch.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: November 24, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4701359
    Abstract: A packaging material for photosensitive materials for photographic purpose being light-shielding and having the following polyethylene polymer layer;(a) containing 40 to 99% by weight of a low-pressure linear low-density polythylene (L-LDPE) produced by copolymerization of ethylene and heptene-1 or octene-1 by a liquid phase method, the density of said polyethylene is in the range from 0.870 to 0.925 g/cm.sup.3, and the melt index of the above polyethylene is in the range from 1.2 to 10 g/10 minutes.(b) having a thickness of thicker than 20 .mu.m,(c) being formed by inflation process, and(d) having a tear strength in longitudinal direction/a tear strength in lateral direction ratio of more than 0.6.The packaging material of the invention is superior in the small difference in tear strength between longitudinal direction and lateral direction, in physical strength, in heat sealing properties and in light-shielding property.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: October 20, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao
  • Patent number: 4687692
    Abstract: A packaging material for photosensitive materials for photographic purposes which is a laminated film having light-shielding property and comprising,(a) a perforated film layer of a thermoplastic resin having a thickness of 7 to 150 .mu.m,(b) a spunbonded nonwoven fabric layer laminated on an adhesive layer which penetrates holes of said perforated film, and(c) a low-pressure linear low-density polyethylene film layer containing more than 50 weight % of a low-pressure linear low-density polyethylene resin and being located as the inner surface layer.The packaging material of the invention is superior in the small difference in tear strength between longitudinal direction and lateral direction, in physical strength, in heat sealing properties and in light-shielding property. As a result, its thickness can appreciably be made thinner than the conventional packaging material, and its cost is lowered. This packaging material is usable for a weight photosensitive material and for a roll having a sharp edge.
    Type: Grant
    Filed: April 11, 1986
    Date of Patent: August 18, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mutsuo Akao