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    31.
    发明专利
    未知

    公开(公告)号：DE2364967C3

    公开(公告)日：1978-04-27

    申请号：DE2364967

    申请日：1973-12-28

    Applicant: MITA INDUSTRIAL CO. LTD., OSAKA (JAPAN)

    Inventor： GOTODA, KATSUHIKO, OSAKA (JAPAN)

    IPC: G03G5/02 ,  G03G5/043 ,  G03G5/14

    Abstract: A novel photosensitive plate which has a sensitivity regardless of the polarity of the applied charge is disclosed. Said photosensitive plate comprises (a) an electroconductive substrate, (b) a first inorganic photoconductive layer formed on said substrate, (c) a substantially transparent, organic insulating layer formed on said first inorganic photoconductive layer and (d) a second inorganic photoconductive layer formed on said organic insulating layer. Said photosensitive plate is characterized in that the first inorganic photoconductive layer is identical with the second photoconductive layer with respect to the type of the photoconductive material used, namely the N-type or P-type, and when the inorganic photoconductive layers are of the N-type, the organic insulating layer is composed of an organic insulating material having a long range for electrons and when the inorganic photoconductive layers are of the P-type, the organic insulating layer is composed an organic insulating material having a long range for positive holes.

    32.
    发明专利
    未知

    公开(公告)号：DE2338837B2

    公开(公告)日：1980-11-27

    申请号：DE2338837

    申请日：1973-07-31

    Applicant: MITA INDUSTRIAL CO. LTD., OSAKA (JAPAN)

    Inventor： MATSUMOTO, SHOJI, NEYAGAWA ,  NISHIHAMA, HITOSHI, HIRAKATA ,  AIZAWA, TATSUO, OSAKA

    IPC: G03G15/05 ,  G03G5/00 ,  G03G5/02 ,  G03G15/01 ,  G03G15/18 ,  G03G15/22 ,  G03G13/056

    Abstract: 1433350 Transferring latent images MITA INDUSTRIAL CO Ltd 30 July 1973 [31 July 1972] 36165/73 Heading G2H In a method of charge image transfer electrophotography employing a sensitive member having a conductive base 1, a photo-conductive layer 2 and a transparent insulating layer 3, the surface of the member is first charged primarily overall (using a direct current corona 5), the surface is then exposed to an image having light areas L and dark areas D and simultaneously or subsequently is subjected to a secondary charging (using an alternating current corona 9). The photoconductive layer is then treated (e.g. by overall light exposure) to eliminate the charge at the interface between the photo-conductive layer and the insulating layer, the resulting electrostatic image is transferred by contact to a transfer sheet which is then developed and fixed in the conventional manner. The characteristics of the alternating current used for secondary charging and/or the secondary charging time are chosen so that the electrostatic image formed on the surface of the member after dissipation of the interface charge has the same polarity as the polarity of the primary charging and so that the potential of the light areas L of said image is substantially equal to the "untransferable upper limit potential" and the potential of the dark areas D are higher than the said limit potential. The "untransferable upper limit potential" is defined as the upper limit of the potential which does not permit the electrostatic image to be transferred for a copy sheet by mere contact. A multi-colour electrophotographic apparatus employing this method comprises a sensitive surface A mounted on a drum 1 for circulation past primary charging station 4, a secondary charging and colour exposure station 28, an overall exposure station 39 and an electrostatic image transfer station M. Image-receiving material 10 is fed from a roll by a series of rollers, cut to a length corresponding to the length of the original by cutters 50, 51, and taken up by a suction drum 49 which advances it past the transfer station M, a developing zone and a fixing zone 71. To effect multi-colour reproduction the receiving sheet is circulated a plurality of times past the transfer station M, each time picking up one colour separation image of the original and being developed with the corresponding colour developer from one of a series of liquid developer troughs 57, 58, 59 and 60 which are brought selectively into a position above cams 69 and 70 by a transport device 56. Operation of the cams raises the selected trough into a developing position with a development electrode 65, 66, 67 or 68 adjacent the surface of drum 49. The images are fixed by heat from heaters 72 and the finished sheet is stripped from the drum by a device 73. The colour separation images are formed by positioning one of a series of coloured mirrors 34, 35, 36 and 37 in the path of light from an original a.

    35.
    发明专利
    未知

    公开(公告)号：DE2618757B2

    公开(公告)日：1979-10-04

    申请号：DE2618757

    申请日：1976-04-28

    Applicant: MITA INDUSTRIAL CO. LTD., OSAKA (JAPAN)

    Inventor： MIYAKAWA, NOBUHIRO, KOBE, HYOGO ,  INOUE, EIICHI ,  KOKADO, HIROSHI

    IPC: B41M5/20 ,  B44F1/12 ,  G03G5/10 ,  G03G5/14

    Abstract: An electroconductive substrate for an electrically responsive recording material comprising a porous substrate and a layer of at least one cationic or anionic electric conductor, the conductor layer being formed in the porous substrate along the entire thickness direction thereof extending from one surface of the porous substrate to the other surface of the porous substrate, wherein the conductor layer has a multilayer distribution structure comprising (a) a layer of a cationic electroconductive resin distributed predominantly in the one surface portion of the porous substrate, (b) a layer of an anionic electroconductive resin distributed predominantly in the other surface portion of the porous substrate and (c) a layer of a polysalt of the cationic electroconductive resin and the anionic electroconductive resin interposed between both the electroconductive resin layers (a) and (b) in such a positional relationship that the polysalt layer (c) is adjacent to the electroconductive resin layers (a) and (b).

    39.
    发明专利
    未知

    公开(公告)号：DE1940295B2

    公开(公告)日：1975-02-06

    申请号：DE1940295

    申请日：1969-08-07

    Applicant: MITA INDUSTRIAL CO. LTD., OSAKA (JAPAN)

    Inventor： YOKOYAMA, TAIZO, OSAKA (JAPAN)

    IPC: C07D209/88 ,  C09B1/20 ,  G03C1/58

    Abstract: A wet type developer for use in diazo-type copying consisting essentially of A. 0.2 TO 5.0 PERCENT BY WEIGHT OF AN AZO COUPLING COMPONENT; B. 0.5 TO 10.0 PERCENT BY WEIGHT OF AN ALKALI AGENT; C. 0 TO 20.0 PERCENT BY WEIGHT OF A REDUCING AGENT; D. 0 TO 0.5% BY WEIGHT OF SURFACE ACTIVE AGENT; AND E. THE BALANCE BEING WATER, THE AZO COUPLING COMPONENT BEING A COMPOUND OF THE FORMULA WHEREIN Z2 is I. A HYDROXY ARYL GROUP, II. A HYDROXY ARYL GROUP SUBSTITUTED BY A SO3H, COOH, SO3M, COOM, alkoxy, halogen, sulphonamide, or an alkoxycarbonyl group, wherein M is an alkali metal or ammonium, or III. A GROUP REPRESENTED BY THE FORMULA WHEREIN Z4 is (a) an arylene group, (b) an arylene group substituted by SO3H, COOH, SO3M, COOM, alkoxy, halogen or an alkyl group, or (c) WHEREIN Y is -O-, -SO2-, or -NH-, and M is as defined above; each of Z1 and Z5 is I' A HYDROXY ARYL GROUP, OR II'. A HYDROXY ARYL GROUP SUBSTITUTED BY SO3H, COOH, SO3M, COOM, alkoxy, halogen, sulphonamide, or an alkoxy-carbonyl group, wherein M is as defined above; and Z3 is a hydroxy alkyl group, a hydroxy aryl group, or a hydroxy aryl group substituted by SO3H, COOH, SO3M, COOM, alkoxy, halogen, sulphonamide, or an alkoxycarbonyl group, wherein M is as defined above, with the proviso that when (i), (ii), (b), (i') or (ii') is a naphthalene group, all substituents are located on the ring of the naphthalene group not adjacent the guanyl residue.

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