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41. 发明专利

JPH0841447A RAW MATERIAL IRON POWDER FOR MILDLY PYROGENIC COMPOSITION AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0841447A
公开(公告)日：1996-02-13
申请号：JP17679294
申请日：1994-07-28
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI , OMURA TAKEO , TAKAHASHI YOSHINORI
IPC分类号： C09K5/16 , C09K5/00
摘要： PURPOSE:To obtain the raw material iron powder containing small amount of calcium sulfide powder, free from production of a toxic material during the production, excellent in heat developing characteristics, having no uneasiness in health control when used as a disposable body warmer, etc., and resistant to the production of hydrogen gas during the storage. CONSTITUTION:This is a raw material iron powder for the composition which mildly develops heat in the atmosphere by mixing with a reaction assistant, water and a humectant. The raw material iron powder contains calcium sulfide powder in an amount of 0.003-1wt.%, preferably 0.01-0.3wt.% based on the iron powder. The calcium sulfide powder having particle size not exceeding 100 mesh is preferable because it can exhibit superior effect. Further, the raw, i.e., material iron powder is obtained by adding and mixing iron power with the calcium sulfide.

42. 发明专利

JPH05205960A MANUFACTURE OF FERRITE MAGNET 失效
公开(公告)号：JPH05205960A
公开(公告)日：1993-08-13
申请号：JP1480092
申请日：1992-01-30
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI , ARAYA MATAO , OKUYA KATSUNOBU
IPC分类号： C01G49/00 , H01F1/11 , H01F41/02
摘要： PURPOSE:To provide an electrical discharge heating method where abnormal particles are prevented from growing and a sintered ferrite magnet is set uniform in sintering structure so as to obtain a sintered ferrite magnet excellent in magnetic properties. CONSTITUTION:Ferrite magnetic powder 6-12m /g in specific surface area is formed by pressure in a magnetic field and sintered in an atmosphere of oxygen over 20% in concentration under pressure of over 1Torr through electrical discharge by a direct current voltage where an alternating voltage overlaps.

43. 发明专利

JPH0442904A MAGNETIZATION OF RARE EARTH ALLOY MAGNET 失效
公开(公告)号：JPH0442904A
公开(公告)日：1992-02-13
申请号：JP14629390
申请日：1990-06-06
申请人： KAWASAKI STEEL CO
发明人： ABE MASAHARU , KIJIMA SHINICHI , NUSHISHIRO KOICHI , FUJINAGA MASASHI
IPC分类号： H01F1/053 , H01F13/00
摘要： PURPOSE:To achieve collective magnetization to provide a high surface magnetic field in a short time and enable durability of a magnetizer to be improved by performing electromagnetic induction heating of a rare earth alloy magnet and then magnetizing it while a coercive force (iHc) is in a specific state. CONSTITUTION:After mixing an Nd-Fe-B rapid-cooling thin-band ground magnetic powder, epoxy resin which is in liquid at room temperature, and a curing agent, they are subjected to compression molding and are heated, and the epoxy resin is cured, thus obtaining plastic magnetic ring. A 6-turn ring-shaped coil is used for high-frequency induction heating, heating is made for a specified amount of time, and then immediately magnetization is made below 9kOe using a commercial magnetizer. The commercial magnetizer is in general an outer- periphery collective magnetizer which is produced by manufactures of electromagnetic equipment and consists of an air core 3 at a part where a magnetization yoke 1, a coil 2, and a body to be magnetized are set. The iHc of the body to be magnetized is small, namely below 9kOe, thus achieving full magnetization even if magnetizing magnetic field is small.

44. 发明专利

JPH03283415A DIFFERENTIAL TRANSFORMER 失效
公开(公告)号：JPH03283415A
公开(公告)日：1991-12-13
申请号：JP8093190
申请日：1990-03-30
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI
IPC分类号： H01F30/00
摘要： PURPOSE:To have sufficient sensitivity against microscopic displacement by a small number of winding, and to reduce the inductance of a winding by a method wherein a thin soft magnetic film is formed on the surface of a movable part, two sets of coils are wound on both surfaces of a substrate respectively, a set of coils are wound in the same direction and connected in series, and the other set of coil are wound in different direction and connected in series. CONSTITUTION:A U-shaped notch part and through holes 6a, 6b, 6c and 6d are provided on the surface of a substrate 1. Primary windings 2a and 2b, and secondary windings 3a and 3b are formed respectively on both sides of the substrate 1 by etching the adhered copper foil. The primary windings 2a and 2b on both surfaces are connected in such a manner that they are wound in the same direction through the intermediary of through holes 6a and 6b. the secondary windings 3a and 3b are connected in such a manner that they are wound in reverse direction through the intermediary of through holes 6c and 6d. Besides, a thin soft magnetic film 4 is formed on the inside of a notched part 5 using a sputtering method.

45. 发明专利

JPH03157905A OXIDE SOFT MAGNETIC FILM 失效
公开(公告)号：JPH03157905A
公开(公告)日：1991-07-05
申请号：JP29618889
申请日：1989-11-16
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI
IPC分类号： H01F10/26 , H01F41/32
摘要： PURPOSE:To electrically easily vary permeability by forming a structure in which a conductor layer, an oxide soft magnetic layer, a solid electrolyte layer having conductivity due to oxygen ions and a porous conductor layer are sequentially laminated. CONSTITUTION:A conductor layer, an oxide magnetic layer, a solid electrolyte layer having conductivity due to oxygen ions and a porous conductor layer are sequentially laminated. A current is conducted between the conductor layer and the porous layer to inject or discharge the ions from the solid layer to the soft layer. The ion concentration of the soft layer is varied by the integrated value of the current to control its permeability. The electrolyte having the conductivity by the ions desirably includes, for example, zirconia compound, etc., represented by AxZr1-xOz-x (A: one or two types of Ca, Y, Yb, Gd, Nd, and Sc). The soft magnetic material desirably includes ferrite, etc., represented by MFezO4 (M: one or more types of Mg, Mn, Fe, Co, Ni, Cu and Zn).

46. 发明专利

JPH02210807A THIN FILM INDUCTANCE ELEMENT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH02210807A
公开(公告)日：1990-08-22
申请号：JP2999889
申请日：1989-02-10
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI
IPC分类号： H01F41/04 , H01F17/00
摘要： PURPOSE:To obtain a large inductance with high efficiency by a method wherein a magnetic layer sandwiched by insulating layers and a conductor layer constituting a coil which reciprocates on the upper side and the lower side of the insulating layers and goes round the magnetic layer are provided, and the upper surface of the insulating layer in contact with the lower surface of the magnetic layer is made flat, which magnetic layer is formed in a flat plate type. CONSTITUTION:A closed magnetic path, which has an aperture at the center of the surface of a substrate 1 composed of insulating material and circulates in a plane parallel to the substrate surface, is constituted. A first insulating layer 3 and a second insulating layer 5 sandwich the lower surface and the upper surface of a magnetic layer 4. A conducting layer is formed so as to alternately pass the upper side and the lower side of the insulating layers from one end of the magnetic layer 4 to the other end thereof through the central aperture part. That is, a first conducting layer 2 and a second conducting layer 6 are arranged. In particular, the upper surface of the first insulating layer 3 is flattened, and the magnetic layer 4 thereon is formed in a plane type. Thereby, the magnetic layer 4 is not bent, so that effective permeability is increased and large inductance can be obtained with high efficiency.

47. 发明专利

JPH01245266A CARRIER FOR ELECTROSTATIC LATENT IMAGE DEVELOPER 失效
公开(公告)号：JPH01245266A
公开(公告)日：1989-09-29
申请号：JP7193488
申请日：1988-03-28
申请人： KAWASAKI STEEL CO
发明人： NAKAMURA NAOMICHI , FUJINAGA MASASHI , OKUNO KEIZOU
IPC分类号： G03G9/113
摘要： PURPOSE:To prolong the life of the developer by coating the surface of carrier nucleus particles with a diamond layer. CONSTITUTION:Since diamond is a material having the hardness much higher than the hardness of the nucleus particles and resin, the mechanical strength of the carrier particles is extremely enhanced by the diamond file and the breakage of the particles even by the long-period time mechanical impact by agitation in a developing machine is substantially obviated. Since diamond has extremely high thermal conductivity, the heat generation by friction can be rapidly dissipated and the generation of the toner sticking to the carrier surface, i.e., so-called spent toner, is decreased. The life of the toner is thereby improved.

48. 发明专利

JPH01147477A FERRITE CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER HAVING SUPERIOR MOISTURE RESISTANCE 失效
公开(公告)号：JPH01147477A
公开(公告)日：1989-06-09
申请号：JP30450487
申请日：1987-12-03
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI , OKUNO KEIZOU
IPC分类号： G03G9/107
摘要： PURPOSE:To obtain a Cu-Zn ferrite carrier having superior moisture resistance in spite of the uncoated state by allowing specified conditions to be satisfied in a specified compsn. of ferrite. CONSTITUTION:Ferrite having a compsn. represented by a formula [(Cu1-XMgX)1-YZnYO]2-Z[Fe2O3]2 (where each of X, Y and Z is mol number, 0.1

49. 发明专利

JPH10280083A IRON-BASE POWDER MIXTURE FOR POWDER METALLURGY USE 失效
公开(公告)号：JPH10280083A
公开(公告)日：1998-10-20
申请号：JP8925797
申请日：1997-04-08
申请人： KAWASAKI STEEL CO , MITSUBISHI MATERIALS CORP
发明人： UENOSONO SATOSHI , OGURA KUNIAKI , FUJINAGA MASASHI
IPC分类号： B22F9/08 , B22F1/00 , B22F5/00 , C22C33/02
摘要： PROBLEM TO BE SOLVED: To obtain an iron-base powder mixture for powder metallugy use, capable of producing a sintered compact excellent in machinability and sliding characteristic by mixing, with an atomized iron powder containing specific amounts of Mn, a powder of compound containing specific amounts of B and a powder of S-containing compound or further a graphite powder, a copper powder, a lubricant, etc. SOLUTION: The iron-base powder mixture for powder metallurgy use is obtained by mixing a B-containing compound powder and an S-containing compound powder or further a graphite powder, a copper powder, and a lubricant with an iron powder. It is preferable to use, as the above iron powder, an atomized iron powder containing 0.05-0.40 wt.% Mn and further containing, if necessary, as an alloy component for improving strength, 0.5-7.0% Ni or 0.05-6.0% Mo in partially alloyed state. As to the B-containing compound, its mixing amount is 0.001-0.3% expressed in terms of B, and H3 BO3 , B2 O3 , BN, etc., are used. As to the S-containing compound, its mixing amount is 0.03-0.3% expressed in terms of S, and S, FeS, MnS, etc., are properly used. Further, preferred mixing amounts of the graphite powder and the copper powder are 0.05-3.0% and

50. 发明专利

JPH08183951A RAW MATERIAL IRON POWDER FOR SLOW HEAT-GENERATING COMPOSITION AND PRODUCTION THEREOF 失效
公开(公告)号：JPH08183951A
公开(公告)日：1996-07-16
申请号：JP32751194
申请日：1994-12-28
申请人： KAWASAKI STEEL CO
发明人： FUJINAGA MASASHI
IPC分类号： C09K5/16 , C09K5/00
摘要： PURPOSE: To obtain the raw material iron powder good in the heat-generating characteristic, capable of reducing the amount of hydrogen gas produced during storage, and useful for disposable body warmers, etc., without by-producing an injurious substance, by mixing specific iron powder with thiosulfate salt powder in a specific ratio. CONSTITUTION: (A) Iron powder giving a pH of 8-10, when 1g of the iron powder is charged in 100ml of water and mixed with stirring and further when the pH of the supernatant of the mixture is measured, is mixed with (B) the powder of a thiosulfate salt, preferably the powder of one or more kinds of alkali(ne earth) metal thiosulfates to obtain the raw material iron powder. The raw material iron powder is mixed with a reaction auxiliary, water and a water- holding agent to obtain the composition slowly generating the heat in the atmosphere. The component B has preferably particle sizes of 100-500 meshes. The component A is preferably produced by treating solid phase-reduced iron powder with an alkali aqueous solution.

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