公开(公告)号：DE60032700D1

公开(公告)日：2007-02-15

申请号：DE60032700

申请日：2000-10-05

Applicant: SHARP KK

Inventor： SHINKAWA KOUJI ,  SAKAI TAKASHI ,  YAMANAKA TAKAYUKI ,  INOUE ATSUSHI ,  MASUDA JITSUO

IPC: G03G21/10

Abstract: In image forming apparatuses producing recycled toner from residual toner and recycling the recycled toner, the toner composition changes, and the toner properties worsen, because the external additive contained in the collected residual toner that is collected with a cleaning portion (6) decreases during the image formation. The residual toner that has been collected with the cleaning portion (6) is conveyed through a conveyance path (51) to a collected residual toner storage (62), and external additive is supplemented from an external additive cartridge (64), and mixed with being stirred to produce recycled toner. In a fresh toner storage (63), fresh toner end recycled toner are stirred, and when the amount of toner in a developing portion (4) drops below a predetermined amount, toner is conveyed from the fresh toner storage (63) through a conveyance path (68) to the developing portion (4). The toner that has been conveyed to the developing portion (4) is supplied to a photosensitive drum (1).

公开(公告)号：DE69332214T2

公开(公告)日：2003-04-24

申请号：DE69332214

申请日：1993-06-29

Applicant: SHARP KK

Inventor： TOYOSHIMA TETSURO ,  UEDA TETSUYUKI ,  INOUE ATSUSHI ,  KAMIMURA TAISUKE ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/06 ,  G03G15/08

Abstract: The present invention relates to a developing device for developing, by using a developer (13, 16; 27, 107), a latent image formed on a surface of an image data forming member (7; 21; 101), comprising: a developer accommodating section (14; 26; 103) for accommodating the developer; a developer retaining member (2; 23; 102) for receiving the developer from the developer accommodating section (14; 26; 103) and transporting the developer to the latent image formed on the image data forming member (7; 21; 101); an electrode (4; 24; 104) provided at a position which is downstream from the developer accommodating section (14; 26; 103) and upstream from the image data forming member (7; 21; 101) in a direction in which the developer is transported, the electrode (4; 24; 104) being opposed to the developer retaining member (2; 23; 102); and voltage applying means (10; 25; 105, 106) for applying a DC voltage between the electrode (4; 24; 104) and the developer retaining member (2; 23; 102) so that the electric sign of the electrode (4; 24; 104) be identical to that of the toner charge.

公开(公告)号：DE69332214D1

公开(公告)日：2002-09-19

申请号：DE69332214

申请日：1993-06-29

Applicant: SHARP KK

Inventor： TOYOSHIMA TETSURO ,  UEDA TETSUYUKI ,  INOUE ATSUSHI ,  KAMIMURA TAISUKE ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/06 ,  G03G15/08

Abstract: The present invention relates to a developing device for developing, by using a developer (13, 16; 27, 107), a latent image formed on a surface of an image data forming member (7; 21; 101), comprising: a developer accommodating section (14; 26; 103) for accommodating the developer; a developer retaining member (2; 23; 102) for receiving the developer from the developer accommodating section (14; 26; 103) and transporting the developer to the latent image formed on the image data forming member (7; 21; 101); an electrode (4; 24; 104) provided at a position which is downstream from the developer accommodating section (14; 26; 103) and upstream from the image data forming member (7; 21; 101) in a direction in which the developer is transported, the electrode (4; 24; 104) being opposed to the developer retaining member (2; 23; 102); and voltage applying means (10; 25; 105, 106) for applying a DC voltage between the electrode (4; 24; 104) and the developer retaining member (2; 23; 102) so that the electric sign of the electrode (4; 24; 104) be identical to that of the toner charge.

公开(公告)号：DE60029552D1

公开(公告)日：2006-09-07

申请号：DE60029552

申请日：2000-12-28

Applicant: SHARP KK

Inventor： YAMANAKA TAKAYUKI ,  INOUE ATSUSHI ,  KIDO EIICHI ,  KOBAYASHI MIKIE ,  WAKADA SHIGEYUKI ,  MASUDA JITSUO ,  OHGOSHI TOSHIHIDE ,  TATSUMI HIROSHI ,  SAKAI MASAHIRO

IPC: G03G15/00 ,  G03G15/08

Abstract: A cleaning element is arranged on the backside of the toner layer metering blade, i.e., the side opposite to the surface in contact with the developer support, in order to prevent the cleaning element from damaging the blade surface and the abutment surface of the metering blade against the developer support. This cleaning element is frictionally moved across the backside of the toner layer metering blade to remove stuck toner from the toner layer metering blade or prevent occurrence of buildups.

公开(公告)号：DE69826220T2

公开(公告)日：2005-11-24

申请号：DE69826220

申请日：1998-12-04

Applicant: SHARP KK

Inventor： YAMADA MASANORI ,  YAMANAKA TAKAYUKI ,  TAKAYA TOSHIHIKO ,  IWAMATSU TADASHI ,  INOUE ATSUSHI ,  AZUMA NOBUYUKI ,  YASUDA KEIJI ,  MATSUYAMA KAZUHIRO ,  TATSUMI HIROSHI

IPC: G03G15/08

公开(公告)号：DE69718602T2

公开(公告)日：2003-11-13

申请号：DE69718602

申请日：1997-10-29

Applicant: SHARP KK

Inventor： TOYOSHIMA TETSURO ,  AZUMA NOBUYUKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/08

Abstract: A developing device has a development roller for carrying toner on a surface thereof, a toner supply roller for supplying the toner to the development roller, a flat spring which comes into contact with the development roller, charges the toner to be supplied to the development roller and applies the toner to the development roller while regulating the thickness of a layer of the toner. The flat spring has a plurality of flat-plate parts including a contact flat-plate part which comes into contact with the development roller, and a curved part which connects the flat-plate parts to each other. In this structure, by arbitrarily selecting dimensional parameters of the flat spring, it is possible to easily obtain various flat springs having different properties. Therefore, for example, the stress to the toner and the stress to the members can be easily reduced simultaneously with a design of the flat spring. Moreover, it is possible to improve the uniformity of the toner layer thickness in the axis direction of the development roller and the uniformity of charging of the toner.

公开(公告)号：DE69320882T2

公开(公告)日：1999-05-12

申请号：DE69320882

申请日：1993-06-29

Applicant: SHARP KK

Inventor： TOYOSHIMA TETSURO ,  UEDA TETSUYUKI ,  INOUE ATSUSHI ,  KAMIMURA TAISUKE ,  FUJITA HIDEAKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/06 ,  G03G15/08

Abstract: The present invention relates to a developing device for developing, by using a developer (13, 16; 27, 107), a latent image formed on a surface of an image data forming member (7; 21; 101), comprising: a developer accommodating section (14; 26; 103) for accommodating the developer; a developer retaining member (2; 23; 102) for receiving the developer from the developer accommodating section (14; 26; 103) and transporting the developer to the latent image formed on the image data forming member (7; 21; 101); an electrode (4; 24; 104) provided at a position which is downstream from the developer accommodating section (14; 26; 103) and upstream from the image data forming member (7; 21; 101) in a direction in which the developer is transported, the electrode (4; 24; 104) being opposed to the developer retaining member (2; 23; 102); and voltage applying means (10; 25; 105, 106) for applying a DC voltage between the electrode (4; 24; 104) and the developer retaining member (2; 23; 102) so that the electric sign of the electrode (4; 24; 104) be identical to that of the toner charge.

公开(公告)号：DE60032700T2

公开(公告)日：2007-11-08

申请号：DE60032700

申请日：2000-10-05

Applicant: SHARP KK

Inventor： SHINKAWA KOUJI ,  SAKAI TAKASHI ,  YAMANAKA TAKAYUKI ,  INOUE ATSUSHI ,  MASUDA JITSUO

IPC: G03G21/10

Abstract: In image forming apparatuses producing recycled toner from residual toner and recycling the recycled toner, the toner composition changes, and the toner properties worsen, because the external additive contained in the collected residual toner that is collected with a cleaning portion (6) decreases during the image formation. The residual toner that has been collected with the cleaning portion (6) is conveyed through a conveyance path (51) to a collected residual toner storage (62), and external additive is supplemented from an external additive cartridge (64), and mixed with being stirred to produce recycled toner. In a fresh toner storage (63), fresh toner end recycled toner are stirred, and when the amount of toner in a developing portion (4) drops below a predetermined amount, toner is conveyed from the fresh toner storage (63) through a conveyance path (68) to the developing portion (4). The toner that has been conveyed to the developing portion (4) is supplied to a photosensitive drum (1).

公开(公告)号：DE69917954T2

公开(公告)日：2005-06-30

申请号：DE69917954

申请日：1999-02-24

Applicant: SHARP KK

Inventor： IWAMATSU TADASHI ,  MATSUYAMA KAZUHIRO ,  TAKAYA TOSHIHIKO ,  INOUE ATSUSHI ,  YAMADA MASANORI ,  AZUMA NOBUYUKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/08

Abstract: An object of the present invention is to prevent an electrical breakdown of a toner layer and an occurrence of overcurrent, thereby preventing quality of image from being degraded at the time of development, when development with one-component toner is conducted using a developing roller of low resistance. The resistance value Rd of a developing roller (41) which carries and conveys one-component toner (10) in a manner of coming into contact with a photoconductor (1) which bears an electrostatic latent image, is defined as Rd = rho d . (Dd1/S1), wherein S1 (cm ) is an area in which the developing roller (41) comes into contact with the static image bearing member via a toner layer (45), Dd1 (cm) is a layer thickness of a semiconductive layer which composes the developing roller, and rho d ( OMEGA . cm) is a volume resistivity thereof. The range of the resistance Rd is set as 10 and the resistance Rt ( OMEGA ) of the toner layer is set as Rt > 5 x 10 . By using the developing roller (41) of low resistance, excellent development is realized and an electrical breakdown and an overcurrent can be avoided by the resistance value of the toner layer.

公开(公告)号：DE69917954D1

公开(公告)日：2004-07-22

申请号：DE69917954

申请日：1999-02-24

Applicant: SHARP KK

Inventor： IWAMATSU TADASHI ,  MATSUYAMA KAZUHIRO ,  TAKAYA TOSHIHIKO ,  INOUE ATSUSHI ,  YAMADA MASANORI ,  AZUMA NOBUYUKI ,  YAMANAKA TAKAYUKI

IPC: G03G15/08

Abstract: An object of the present invention is to prevent an electrical breakdown of a toner layer and an occurrence of overcurrent, thereby preventing quality of image from being degraded at the time of development, when development with one-component toner is conducted using a developing roller of low resistance. The resistance value Rd of a developing roller (41) which carries and conveys one-component toner (10) in a manner of coming into contact with a photoconductor (1) which bears an electrostatic latent image, is defined as Rd = rho d . (Dd1/S1), wherein S1 (cm ) is an area in which the developing roller (41) comes into contact with the static image bearing member via a toner layer (45), Dd1 (cm) is a layer thickness of a semiconductive layer which composes the developing roller, and rho d ( OMEGA . cm) is a volume resistivity thereof. The range of the resistance Rd is set as 10 and the resistance Rt ( OMEGA ) of the toner layer is set as Rt > 5 x 10 . By using the developing roller (41) of low resistance, excellent development is realized and an electrical breakdown and an overcurrent can be avoided by the resistance value of the toner layer.