公开(公告)号：JPH0627778A

公开(公告)日：1994-02-04

申请号：JP19626892

申请日：1992-06-30

Applicant: CANON KK

Inventor： SUZUKI HIROYUKI ,  NAGASE YUKIO ,  WAKI KENICHIRO ,  HIBINO MASARU ,  NAKANO MASAO

IPC: B41J2/525 ,  G03G15/00 ,  G03G15/01 ,  G03G15/04 ,  G03G15/043 ,  G03G15/06 ,  G03G15/09 ,  G03G21/00 ,  G03G21/10 ,  H04N1/29

Abstract: PURPOSE:To provide an image of high picture quality with a favourable color reproduction property and without causing any problems of blur and other of letters and lines even in a multiple color mode to transfer a developed image to a transcribing material in the lump by way of forming the multiple color developed image on an image holding body. CONSTITUTION:To a development roller 11, bias voltage which direct current voltage of +340V is superimposed on alternating voltage of 200Hz, 1300Vpp is applied, additionally, direct current voltage of +260V is applied between the development roller 11 and a supply roller 13, and bias is set so that electric potential of the supply roller 13 always becomes higher than electric potential of the development roller 11 by 200V. Consequently, toner on the supply roller 13 is transferred to the development roller 11, and on the surface of the development roller 11, a toner layer of specified layer thickness is formed. Toner of the development roller 11 develops a latent image on a photoreceptor 1 at a development position facing the photoreceptor 1.

公开(公告)号：JPH0562993B2

公开(公告)日：1993-09-09

申请号：JP19141385

申请日：1985-08-30

Applicant: CANON KK

Inventor： SATOMURA HIROSHI ,  TAKEUCHI TATSUO ,  NAGASE YUKIO ,  EGAMI HIDEMI ,  HOSONO NAGAO

IPC: G03G15/00 ,  G03G15/16 ,  G03G15/22

公开(公告)号：JPH05188767A

公开(公告)日：1993-07-30

申请号：JP1825692

申请日：1992-01-07

Applicant: CANON KK

Inventor： WAKI KENICHIRO ,  HIBINO MASARU ,  NAGASE YUKIO ,  KENMOCHI KAZUHISA ,  SUZUKI HIROYUKI

IPC: G03G9/087 ,  G03G9/08 ,  G03G15/08

Abstract: PURPOSE:To provide the developing device where deterioration of developer due to residue developer in the vicinity of a developer layer thickness restriction means is prevented when a two components developer is utilized and where an image of the same good quality as an initial image can be formed over a long period of time. CONSTITUTION:In the developing device 30 provided with a developer carrier 31 carrying the two components developer T consisting of toner and magnetic carrier and a developer thickness restriction means 33 restricting the developer T on the developer carrier 31 to be a thin layer, the quantity of the residue developer TD at the upstream of the carrying direction of the developer carrier 31 at the side of the developer layer thickness restriction means 33 is made less than 1/3 of the whole quantity of developer T. Therefore, the toner inside the developer T carried by the developer carrier 31 does not receive a great pressurizing force due to the residue developer TD and is not easily deteriorated.

公开(公告)号：JPH0545035B2

公开(公告)日：1993-07-08

申请号：JP27096584

申请日：1984-12-24

Applicant: CANON KK

Inventor： FUJII HARUO ,  KANEKO SHUZO ,  TANIOKA HIROSHI ,  KUBOTA YOICHI ,  NAGASE YUKIO ,  SHIMADA KAZUTOSHI ,  SAITO KATSUO

IPC: G09F9/30 ,  G09F9/00

公开(公告)号：JPH032773A

公开(公告)日：1991-01-09

申请号：JP13637589

申请日：1989-05-30

Applicant: CANON KK

Inventor： NAGASE YUKIO

IPC: B41J2/44 ,  G03G15/04

Abstract: PURPOSE:To obtain high resolution and high gradation by making the spot diameter of a beam spot in a scanning direction smaller than 0.7 times of a recording picture element size. CONSTITUTION:In response to the recording picture element size in the scanning direction, the spot diameter(1/e ) of the beam spot in the scanning direction is set as follows: the spot size(1/e )

公开(公告)号：JPH032763A

公开(公告)日：1991-01-09

申请号：JP13573489

申请日：1989-05-31

Applicant: CANON KK

Inventor： OKADO KENJI ,  NAGASE YUKIO

IPC: G03G9/09 ,  B41J2/44 ,  G03G9/08 ,  G03G9/087 ,  G03G15/01 ,  G03G15/04

Abstract: PURPOSE:To increase image density and to improve fine line reproducibility and highlight gradation characteristic by specifying the spot size in the scanning direction of a beam spot and the grain size distribution of toner particles. CONSTITUTION:The spot size is specified to (1/e ) =16mum grain size at

公开(公告)号：JPS6480974A

公开(公告)日：1989-03-27

申请号：JP23948587

申请日：1987-09-24

Applicant: CANON KK

Inventor： NAGASE YUKIO ,  WATANABE AKIRA

IPC: G03G15/02 ,  H01T19/00

Abstract: PURPOSE:To charge an object member uniformly and electrostatically by providing a means which corrects electrostatic charging ability uniformly corresponding to the film thickness distribution of a 2nd dielectric. CONSTITUTION:A discharging member 1 consists of 1st and 2nd electrodes 4 and 5 embedded in 1st and 2nd dielectrics 2 and 3 and a bare electrode 6 as a 3rd electrode, and a discharge-resisting film as the 2nd dielectric 3 has an irregular film thickness distribution. Here, the 3rd electrodes 6 applied with a bias voltage is so formed that a part having larger film thickness is closer to the center of an AC discharging area 10 between the 1st and 2nd electrodes according to the film thickness distribution of the 2nd dielectric 3. Namely, the intensity of an electric field is larger and larger toward to the center of the discharging area, so the 3rd electrode 6 is put closer to the center of the discharging area to improve the electrostatic charging ability for increasing the attracting-out quantity of ions. Consequently, a charging current has uniform distribution characteristics and an irregular electrostatic charging current distribution due to the irregular film thickness distribution can be eliminated.

公开(公告)号：JPS63153162A

公开(公告)日：1988-06-25

申请号：JP29882786

申请日：1986-12-17

Applicant: CANON KK

Inventor： EGAMI HIDEMI ,  SATOMURA HIROSHI ,  NAGASE YUKIO ,  TAKEUCHI TATSUO ,  HOSAKA AKIHITO ,  ANDO YUJIRO ,  HOSONO NAGAO

IPC: B41J2/415 ,  G03G15/05 ,  H01T19/00

Abstract: PURPOSE:To obtain an electrostatic recording head which can extract ions stably and uniformly, by applying an alternating voltage first and second electrodes and forming an electric field extending through covering dielectric and space regions between said electrodes then producing ions in the air regions and providing said ions selectively onto a recording face. CONSTITUTION:When an alternating voltage is applied first and second electrodes 1, 2 of a pair of electrodes, creeping discharge occurs near the surface of dielectric existing between said electrodes. In other word, application of alternating voltage causes formation of an electric field extending through a covering dielectric 3, an air region 5 and a dielectric 4 between said electrodes so as to produce discharge in the air region 5. On the other hand, a D.C. bias voltage is applied by a bias power source 10 across a selected third electrode 14 and a backface electrode or a conductive layer 8 of a recording material 6 to form an electric field which causes discharging and produces positive and negative ions each of which are transferred to the side of the recording material 6. The polarity of ion is determined by the polarity of the bias voltage and the surface of an insulation layer 7 in the recording member 6 is charged with that polarity thus forming a static dot image.

公开(公告)号：JPS63136061A

公开(公告)日：1988-06-08

申请号：JP28346886

申请日：1986-11-28

Applicant: CANON KK

Inventor： NAGASE YUKIO

IPC: G03G15/02 ,  H01T19/00

Abstract: PURPOSE:To enable uniform and stable electrification by providing a control means which controls the frequency of an alternating voltage from an alternating voltage applying means according to a detected electrifying current and controls the electrifying current to a preset value. CONSTITUTION:When an AC voltage higher than a specific electrostatic discharging start voltage is applied to between embedded electrodes 11 and 12 from the AC power source 14, electrification is caused in a single area 15 around a part facing the periphery of the interval between the electrodes on the bottom surface of an electrifying device to generate a positive and a negative ion alternately. The electrostatic discharging start voltage varies according to the interval between the embedded electrodes 11 and 12, the thickness and dielectric constant of a dielectric below the embedded electrodes, etc., so it can be determined properly by the trader. A bare electrode 13 is fixed to the bottom surface of the electrifying device 1 which causes electrostatic discharging with the AC voltage. Consequently, the constant quantity of electrification is obtained in any environment and the electrifying current is held at the specific value.

公开(公告)号：JPS6364258A

公开(公告)日：1988-03-22

申请号：JP20909486

申请日：1986-09-05

Applicant: CANON KK

Inventor： SATOMURA HIROSHI ,  NAGASE YUKIO ,  TAKEUCHI TATSUO

IPC: H01J61/76

Abstract: PURPOSE:To obtaine an uniform surface luminous intensity of a light source device and also to make possible to enlarge the surface easily and to miniaturize the device by constructing the device with a dielectric plate, two electrodes, a voltage applying means, gas and a sealing member of gas. CONSTITUTION:A discharge device 1 is constructed with a dielectric plate 11, the 1st. electrode 12 produced on one side surface of the dielectric plate 11, the 2nd. electrode 13 produced in film on the other side surface of the dielectric plate 11, and an insulator film 14 coated on the electrode 13. The said discharge device 1 is enclosed in a plane package 2 (sealing member) so as a required gap is formed between the front plate 2a of the package 2 and the electrode 12. And the electrodes 12 and 13 are connected to an AC source 3 outside of the package 2 though terminals 15 respectively. In the space of the package 2 a gas emitting visible light during the discharge of the said device 1 is sealed. Thereby the uniform surface luminescence can be realized and also the enlarging of the surface and the miniaturization of the device can be enabled easily.