专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2003076063A Nonmagnetic single component developer and method for forming image 审中-公开
标题翻译：非单一组件开发者和形成图像的方法
公开(公告)号：JP2003076063A
公开(公告)日：2003-03-14
申请号：JP2001265264
申请日：2001-09-03
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： NOSHIRO TOSHIHIKO , OCHIAI MASAHISA
IPC分类号： G03G9/08 , G03G9/087 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a nonmagnetic single component developer which has a high mechanical strength and is hardly broken, which generates an enough charge even at a high temperature and high humidity and which hardly produce a residual toner. SOLUTION: The nonmagnetic single component developer essentially comprises a binder resin containing a polyolefin resin having a cyclic structure, a coloring agent and a charge controlling agent and is composed of irregular particles which are approximately spheric.
摘要翻译：要解决的问题：提供具有高机械强度且几乎不破裂的非磁性单组分显影剂，即使在高温高湿下也能产生足够的电荷，并且几乎不产生残留的调色剂。解决方案：非磁性单组分显影剂基本上包括含有具有环状结构的聚烯烃树脂，着色剂和电荷控制剂的粘合剂树脂，并且由近似球形的不规则颗粒组成。

2. 发明专利

JP2000181135A MANUFACTURE OF COLOR POLYMERIZED TONER 失效
公开(公告)号：JP2000181135A
公开(公告)日：2000-06-30
申请号：JP36039898
申请日：1998-12-18
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA , ASANAE MASUMI
IPC分类号： G03G9/09 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide the manufacturing method of the color polymerized toner narrow in a grain size distribution. SOLUTION: The manufacturing method of the color polymerized toner comprises at least a process for suspension granulating a polymerizable monomer mixed solution containing a colorant and a process for polymerizing in the presence of a polymerization initiator, and in the suspension granulation process the polymerizable monomer mixed solution is stirred and stepwise increased in stirring speed, thus the obtained toner to be made narrow in the grain size distribution by suspension polymerization is obtained and the toner of a high-quality image is provided.

3. 发明专利

JPH09292740A PRODUCTION OF FERRITE CARRIER 失效
公开(公告)号：JPH09292740A
公开(公告)日：1997-11-11
申请号：JP3682397
申请日：1997-02-21
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA , ASANAE MASUMI , SAITO TSUTOMU
IPC分类号： G03G9/107 , C01G49/00
摘要： PROBLEM TO BE SOLVED: To provide a production method of a Li-Mn ferrite carrier which does not contain harmful elements and can form a high quality image. SOLUTION: After source materials are mixed to obtain a basic composition of 2 to 15mol% Li2 O, 5 to 30mol% MnO and 60 to 90mol% Fe2 O3 , the mixture is calcined, pulverized, granulated and sintered in a N2 gas atmosphere having 0 to 15vol.% O2 concn. Or, after the source materials are mixed to obtain a basic composition of 2 to 15mol% LiO2 , 5 to 30mol% MnO and 60 to 90mol% Fe2 O3 , the mixture is calcined, pulverized, granulated and sintered in air, and then heat treated in a N2 gas atmosphere having 0 to 15vol.% O2 concn.

4. 发明专利

JPH09258489A MAGNETIC CARRIER FOR DEVELOPER 失效
公开(公告)号：JPH09258489A
公开(公告)日：1997-10-03
申请号：JP341697
申请日：1997-01-13
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA , SAITO TSUTOMU , ASANAE MASUMI
IPC分类号： G03G9/10 , G03G9/107
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic carrier for a two-component developer having high ability to impart electric charges to a toner, hardly causing sticking and capable of forming an image having high image quality. SOLUTION: This magnetic carrier forming a magnetic developer by mixing with a toner and used for developing an electrostatic charge image formed on an image carrier has 20-130μm average particle diameter (d), (0.178 to 7.7×10 d) to (0.314 to 12×10 d)m /g specific surface area and has a basic compsn. represented by the formula (M.O)100-x .(Fe2 O3 )x [where M is Cu+Zn or Li+Mn and (x) is 55-80mol%].

5. 发明专利

JPH09236948A FERRITE CARRIER 失效
公开(公告)号：JPH09236948A
公开(公告)日：1997-09-09
申请号：JP4460596
申请日：1996-03-01
申请人： HITACHI METALS LTD
发明人： SAITO TSUTOMU , ASANAE MASUMI , OCHIAI MASAHISA
IPC分类号： G03G9/10 , G03G9/107 , G03G9/113
摘要： PROBLEM TO BE SOLVED: To obtain an Li-Mn ferrite carrier contg. no harmful element and giving an image having high image quality by imparting a basic compsn. consisting of Li2 O, MnO and Fe2 O3 in a specified molar ratio and specifying magnetization in a magnetic field and average particle diameter. SOLUTION: This ferrite carrier has a basic compsn. consisting of, by mol, 5-15% Li2 O, 8-30% MnO and 60-90% Fe2 O3 . and has 15-60emu/g magnetization σ1 ,000 in a magnetic field of 1,000Oe and 10-150μm average particle diameter. In the case of 60emu/g, halftone reproducibility is deteriorated. In the case of 150μm, an image itself is made rough.

6. 发明专利

JPH09197829A DEVELOPING METHOD 失效
公开(公告)号：JPH09197829A
公开(公告)日：1997-07-31
申请号：JP539296
申请日：1996-01-17
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA , NOSHIRO TOSHIHIKO , ASANAE MASUMI
IPC分类号： G03G15/09 , G03G15/06 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To miniaturize an image forming device and to form an image of high quality by applying a specific alternating electric field between a photoreceptor drum and a magnetic developer, so as to develope an electrostatic charge image on a photoreceptor drum, in a developing region. SOLUTION: A developer supporting means is composed of a permanent magnet member 4 which is provided with plural magnetic poles on the surface and integrally formed to a cylindrical shape and the electrostatic charge image on the photoreceptor drum 7 is developed with the magnetic developer 2 consisting of insulating toner and magnetic carriers. At this time, in the developing region to which the magnetic developer 2 is carried by attraction, an alternating electric field where an AC bias having a frequency (f)=Vm/(0.2-1.3)P and a peak-to-peak voltage VP- P=(1-3) VDC is superimposed on a DC bias is applied between the drum 7 and the magnetic developer 2, to develope the electrostatic charge image. At this time, the circumferential speed (mm/sec) of the permanent magnetic member 4 is defined as Vm, the pitch (mm) in a circumferential direction between the magnetic poles having polarities different from each other is defined as P and a DC bias voltage (V) is defined as VDC.

7. 发明专利

JPH09112539A CONDUCTIVE ROLLER 失效
公开(公告)号：JPH09112539A
公开(公告)日：1997-05-02
申请号：JP26433895
申请日：1995-10-12
申请人： HITACHI CABLE , HITACHI METALS LTD
发明人： NAKABASHI MASANOBU , SUZUKI MASAHIRO , SATO HISASHI , OCHIAI MASAHISA , YAMASHITA KEITARO
IPC分类号： G03G15/02 , F16C13/00 , G03G15/08 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a conductive roller used as a development roller and the like, which generates no fog in the picture image, and can improve the formability. SOLUTION: When a conductive roller is obtained by providing a rubber layer 2 on the surface of a core body 1, the rubber layer 2 is composed of a structure including an ethylene-propylene-diene ternary copolymer, a carbon black, a magnetic powder, and a sulfur-based crosslinking agent. Consequently, the purposes to secure the conductibility, to suppress the heating in a kneading time, to secure a specific magnetizing force, to secure the formability, to secure a necessary bridging degree, to prevent the generation of foam in a mold forming time, and the like can be accomplished.

8. 发明专利

JPH0996922A DEVELOPING METHOD 失效
公开(公告)号：JPH0996922A
公开(公告)日：1997-04-08
申请号：JP25237395
申请日：1995-09-29
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA , NOSHIRO TOSHIHIKO
IPC分类号： G03G9/083 , G03G9/087 , G03G9/107 , G03G15/08 , G03G15/09
摘要： PROBLEM TO BE SOLVED: To obtain a high quality image in toner density over a wide range by setting the magnetic toner concn. within a specified range in magnetic developer constituted of magnetic toner including binding resin and magnetic powder and magnetic carrier. SOLUTION: As to this developing method, an electrostatic charge image is developed by rotatably providing a developing roll 3 having a cylindrical permanent magnetic member on the surface of which a magnetic field having different polarity is arranged at a regular interval in a peripheral direction to face oppositely to an image carrier 4 moving while carrying the electrostatic charge image, and supplying the magnetic developer 2 on the surface of the roll 3. In the magnetic developer 2 constituted of the magnetic toner including the binding resin and the magnetic powder and the magnetic carrier, the magnetic toner concn. is set within the range expressed by an expression 10 =4emu/g, and

9. 发明专利

JPH0990758A DEVELOPING DEVICE 失效
公开(公告)号：JPH0990758A
公开(公告)日：1997-04-04
申请号：JP24120595
申请日：1995-09-20
申请人： HITACHI METALS LTD , HITACHI KINZOKU KIKO KK
发明人： OCHIAI MASAHISA , YAMASHITA KEITARO
IPC分类号： G03G15/09 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device in which a high picture quality image having no uneven photographic density can be obtained in the case in which magnetic brush development using a developing roller in a configuration of omitting a sleeve. SOLUTION: A developing device is equipped with a developing roller 3 which is arranged so as to face to an image carrier 4 moving as supporting an electrostatic charge image, and has a cylindrical permanent magnet member on the surface of which opposite polarity magnetic poles are arranged with equal spacings in the circumferential direction, and a doctor member 5 which regulates the thickness of a magnetic toner held on the surface of the developing roller 3. In the developing device the surface roughness of the developing roller 3 is set within the range of a formula R1=(0.5 to 3)×d1. Where R1 shows the ten points average roughness Rz (μm) of a developing roller surface, and d1 (μm) shows a volume average particle diameter.

10. 发明专利

JPH08314190A DEVELOPING METHOD 失效
公开(公告)号：JPH08314190A
公开(公告)日：1996-11-29
申请号：JP11947095
申请日：1995-05-18
申请人： HITACHI METALS LTD
发明人： OCHIAI MASAHISA
IPC分类号： G03G9/083 , G03G9/087 , G03G13/08 , G03G15/08 , G03G15/09
摘要： PURPOSE: To provide a developing method by which toner scattering and white stripe do not occur, and which can develop a high-quality image. CONSTITUTION: As to this developing method in which a developing roll 9 obtained by making at least the external peripheral surface formed to be a cylindrical surface by a non-magnetic elastic material is rotatably arranged to face oppositely to an image carrier 1 moving while carrying an electrostatic charge image, magnetic toner is supplied on the surface of the roll 9, and also a controlling member slidably abuts on the surface so as to form a toner layer, and the electrostatic charge image is visualized by bringing the image carrier 1 into contact with the roll 9 through the toner layer; the magnetic toner including welding resin whose molecular weight distribution is 10 to 70 and magnetic powder having 10 to 40 pts.wt. as main components is used.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式