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    PHOTORECEPTOR FOR ELECTROPHOTOGRAPHY
    1.
    发明专利
    PHOTORECEPTOR FOR ELECTROPHOTOGRAPHY 失效

    公开(公告)号：JPS57132151A

    公开(公告)日：1982-08-16

    申请号：JP1752481

    申请日：1981-02-10

    Applicant: TORAY INDUSTRIES

    Inventor： NAKASHIMA KIICHI ,  OONO MAMORU ,  KASHIWAGI RIKUO

    IPC: G03G5/02 ,  G03G5/08 ,  G03G5/087

    Abstract: PURPOSE:To suppress dark attenuation and to decrease the drop in contrast potential by setting the density of the dopants in the surface layer part of the CdS powder in a photosensitive layer at the specific value. CONSTITUTION:A conductive substrate 1, a photosensitive layer 2 formed thereon, and an insulation layer 3 formed on the layer 2 are provided, and the layer 2 binds the CdS powder contg. dopants with a binder, thereby forming a photoreceptor 4 for electrophotography. With this photoreceptor 4, the density of the dopants in the surface layer part of the CdS powder of the layer 2 is 10 - 10 (pieces/cm ) or the CdS powder is coated with an insulation characteristic film and the relation between the thickness (t)(mu) of said film, resistivity rho(OMEGA. cm) and the average radius (r)(mu) of the CdS powder is set at 10 . Dark attenuation is suppressed, the drop in contrast potential is decreased, contrast potential is taken large, and the degradation in image quality owing to ground strains, etc. is prevented.

    OPTICAL INFORMATION REPRODUCTION DISK AND ITS MANUFACTURE
    2.
    发明专利
    OPTICAL INFORMATION REPRODUCTION DISK AND ITS MANUFACTURE 失效

    公开(公告)号：JPS5545121A

    公开(公告)日：1980-03-29

    申请号：JP11747678

    申请日：1978-09-26

    Applicant: TORAY INDUSTRIES

    Inventor： NAKASHIMA KIICHI ,  AKATSUKA TAKEAKI ,  WATANABE SHIGENOBU

    IPC: G11B7/26 ,  G11B7/24 ,  G11B7/258

    Abstract: PURPOSE:To improve uniformity, weather resistance and solidness of a light beam reflective layer by forming the light beam reflective layer of a metallic electroless layer constituting principally of nickel, etc. CONSTITUTION:On one side of resin substrate 2, uneven surface 3 expressing reproduced information is provided and on this uneven surface 3, a reflective layer of a metallic electroless plating layer is bonded which consists principally of at least one kind of nickel, cobalt, tin and silver. In manufacture of this, an original plate where reproduced information is curved in an uneven shape is used to copy the unevenness on substrate 2 of vinyl-chloride-based resin. Next, uneven surface 3 is activated by hydrophilic processing and further, curving processing of palladium is performed at need. Then a light beam reflective layer of nickel containing several percents of phosphorus is formed by electroless metal plating and an urethane-based protective layer is formed on the reflection layer.

    DRY TONER
    4.
    发明专利
    DRY TONER 失效

    公开(公告)号：JPS56140356A

    公开(公告)日：1981-11-02

    申请号：JP4386080

    申请日：1980-04-03

    Applicant: TORAY INDUSTRIES

    Inventor： KASHIWAGI RIKUO ,  NAKASHIMA KIICHI

    IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09 ,  G03G9/097 ,  G03G9/10

    Abstract: PURPOSE:To obtain a stable toner with low hygroscopicity by adding a fluidizing agent prepared by coating fine powder of an inorg. substance such as oxide, sulfide, metal or alloy or an org. substance such as higher alcohol with a nonhydrophilic polymer thin film together with resin powder having a specified particle size range. CONSTITUTION:The surface of

    DIRECT ENGRAVING METHOD OF LITHOGRAPHIC PRINTING PLATE WHICH DOES NOT REQUIRE WATER
    6.
    发明专利
    DIRECT ENGRAVING METHOD OF LITHOGRAPHIC PRINTING PLATE WHICH DOES NOT REQUIRE WATER 失效

    公开(公告)号：JPS5683750A

    公开(公告)日：1981-07-08

    申请号：JP16194079

    申请日：1979-12-12

    Applicant: TORAY INDUSTRIES

    Inventor： NAKASHIMA KIICHI ,  KASHIWAGI RIKUO ,  KAMAISHI TADAMI

    IPC: G03G13/28 ,  B41N1/14 ,  G03G5/05

    Abstract: PURPOSE:To form a printing plate of high print-resisting power with less printing stains by using the printing plate formed with a dielectric layer by means of specific resin composition in an engraving method practised by fixing an ink receptive toner imagewise on the printing plate by the use of an electrophotographic method. CONSTITUTION:Org. polysiloxane (A) and the epoxy-contg. alkoxy silane (B) expreseed by formula I [R is org. groups of C3-18 contg. epoxy groups; X is alkoxy of C1-8, (a) is 2, 3] are dissolved in an org. solvent, and the tetraalkoxy titanate (zirconate) (C) expressed by formula II (R1-R4 are hydrocarbon groups of C1-12; M is titanium, zirconium) is added to the thus resulted soln. The resulting reaction mixture is coated on a conductive substrate 21 and is then dried to form a dielectric layer 22, whereby the printing plate is prepd. Next, the latent images of an orlginal obtd. by an electrophotographic method are transferred onto said printing plate and this is developed with an ink receptive toner 23 and is fixed, whereby the printing plate is formed.

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