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    • 2. 发明授权
    • Corona discharge device
    • 电晕放电装置
    • US06208499B1
    • 2001-03-27
    • US08272700
    • 1994-07-08
    • Noboru YonekawaYasuhiro NakagamiKouji Matsushita
    • Noboru YonekawaYasuhiro NakagamiKouji Matsushita
    • G03G1500
    • H01T19/04G03G15/0291G03G2215/028
    • A corona discharge device used in an electrophotographic image forming apparatus includes a discharge member such as a saw-toothed discharge member having sharp discharge ends, and a power supply which applies to the discharge member a discharge voltage containing at least an AC voltage component, wherein at least each discharge end portion of the discharge member is made of an electrically conductive material, which contains nickel and chromium, and/or is coated with a material having a high electric resistance. In the case where the saw-toothed discharge member is employed, a distance D between the discharge end and a member to be charged, and a discharge end pitch P are determined to satisfy a relationship of 2≦D/P≦8.
    • 在电子照相图像形成装置中使用的电晕放电装置包括具有尖锐放电端的诸如锯齿状放电部件的放电部件和向放电部件施加至少包含AC电压成分的放电电压的电源,其中, 排出构件的至少每个排出端部由包含镍和铬的导电材料制成,和/或由具有高电阻的材料涂覆。 在采用锯齿状排出构件的情况下,排出端和被充电构件之间的距离D和排出端间距P被确定为满足2 <= D / P <= 8的关系。
    • 4. 发明授权
    • Image forming apparatus having transfer constant current source
adjustable in response to the thickness of dielectric layer
    • 具有传递恒定电流源的图像形成装置可响应于介电层的厚度而调节
    • US5596391A
    • 1997-01-21
    • US529098
    • 1995-09-15
    • Kouji MatsushitaYasuhiro NakagamiNoboru Yonekawa
    • Kouji MatsushitaYasuhiro NakagamiNoboru Yonekawa
    • G03G15/16G03G21/00
    • G03G15/1675G03G2215/1614
    • An image forming apparatus, including a laminate image-bearing member having a dielectric layer or photoconductive layer, superimposed on an electrically conductive substrate, a transfer member for making pressure contact with said image-bearing member, and a cleaning member for cleaning the surface of said image-bearing member through contact therewith, forms an electrostatic latent image on said image-bearing member, develops said latent image into a visible toner image, and transfers said toner image from said image-bearing member to a transfer sheet passing through a contact-pressure nip portion between said image-bearing member and a transfer member by applying a controlled constant-current regulated transfer bias voltage to said transfer member. Where the transfer member is narrower than the dielectric layer, or photoconductive layer, of the image-bearing member and the width of the cleaning member so as to be arranged within said widths, a controller changes the transfer current of constant-current regulated transfer bias in accordance with the thickness of the dielectric layer or photoconductive layer of the image-bearing member.
    • 一种图像形成装置,包括叠层在导电基底上的具有电介质层或光电导层的叠层图像承载构件,用于与所述图像承载构件压力接触的转印构件,以及用于清洁表面的清洁构件 所述图像承载部件通过与其接触而在所述图像承载部件上形成静电潜像,将所述潜像显影成可见的调色剂图像,并将所述调色剂图像从所述图像承载部件传送到经过接触的转印纸 通过向所述转印构件施加受控的恒流调节转印偏压,所述图像承载部件和转印部件之间的压印辊隙部分。 如果转印部件比图像承载部件的电介质层或光电导层窄,并且清洁部件的宽度被布置在所述宽度内,则控制器改变恒定电流调节转印偏压的转印电流 根据图像承载部件的电介质层或光电导层的厚度。
    • 7. 发明授权
    • Charging device for image forming apparatus
    • 成像装置用充电装置
    • US5842087A
    • 1998-11-24
    • US879329
    • 1997-06-20
    • Kouji MatsushitaYasuhiro NakagamiFutoshi Okazaki
    • Kouji MatsushitaYasuhiro NakagamiFutoshi Okazaki
    • G03G15/02
    • G03G15/0216G03G15/025
    • A charging device K is provided with a flexible electrode 12 and a flexible intermediate member M disposed between the flexible electrode 12 and a charge-receiving member 10, with the flexible intermediate member M being in contact with the charge-receiving member 10. The flexible intermediate member M includes a flexible insulated member 11 and semiconductive member 14 so as to charge the charge-receiving member 10 via a discharge from electrode 12. The absolute value of the difference between the potential of the flexible electrode 12 during discharge and the potential in the vicinity of at least the area of discharge of the flexible electrode 12 among areas in which the flexible intermediate member is in contact with the charge-receiving member 10, is less than the absolute value of the difference between the potential of the charge-receiving member and the potential of the flexible electrode during discharge.
    • 充电装置K设置有柔性电极12和设置在柔性电极12和电荷接收构件10之间的柔性中间构件M,柔性中间构件M与电荷接收构件10接触。柔性 中间构件M包括柔性绝缘构件11和半导体构件14,以便经由电极12的放电来对电荷接收构件10充电。放电期间柔性电极12的电位与电位之间的差异的绝对值 柔性中间构件与电荷接收构件10接触的区域中的至少柔性电极12的排出面积的附近小于电荷接收构件10的电位差的绝对值 成员和放电期间柔性电极的电位。
    • 8. 发明授权
    • Charging device for image forming apparatus
    • 成像装置用充电装置
    • US5787327A
    • 1998-07-28
    • US671879
    • 1996-06-28
    • Kouji MatsushitaYasuhiro Nakagami
    • Kouji MatsushitaYasuhiro Nakagami
    • B41J2/39B41J2/395G03G15/02G03G15/22
    • B41J2/395G03G15/0216G03G15/0233G03G15/025
    • This invention relates to the charging member portion of an image forming apparatus. A plurality of charging members are disclosed that maintain a uniform spacing between a charge-receiving member and the discharging portion of the charging members' electrodes despite surface irregularities and surface waviness on the charge-receiving member. One charging member is in the form of a flexible sheet provided with ventilation holes in a non-contacting portion thereof, permitting the air produced by the rotation of the charge-receiving member to escape through the holes to suppress the lifting of the charging member. Pressure fins can be added to the charging member on the downstream of the ventilation holes for further suppressing any lifting. Another charging member includes a semiconductive member or a electret member on at least the surface of the charging member on the side opposite the charge-receiving member. This permits the charging member to be electrostatically attracted to the charge-receiving member.
    • 本发明涉及图像形成装置的充电部件部分。 公开了多个充电构件,尽管电荷接收构件上的表面凹凸和表面波纹,电荷接收构件和充电构件的电极的放电部分之间保持均匀的间隔。 一个充电构件是在其非接触部分中设置有通气孔的柔性片的形式,允许由电荷接收构件的旋转产生的空气通过孔逸出,以抑制充电构件的提升。 可以在通风孔的下游的充电部件上添加压力翅片,以进一步抑制任何提升。 另一个充电构件在充电构件的与电荷接收构件相对的一侧的至少表面上包括半导体构件或驻极体构件。 这允许充电构件被静电吸引到电荷接收构件。
    • 10. 发明授权
    • Image forming apparatus and method using charge control means
    • 使用充电控制装置的图像形成装置和方法
    • US5911097A
    • 1999-06-08
    • US42670
    • 1998-03-17
    • Masayasu HagaTsugihito YoshiyamaYasuhiro NakagamiMasami MatsuuraAkira Hirota
    • Masayasu HagaTsugihito YoshiyamaYasuhiro NakagamiMasami MatsuuraAkira Hirota
    • G03G15/02G03G21/00
    • G03G15/0266G03G15/0291G03G2215/021Y10S430/102
    • Applied voltage to the contact charging sheet 71 has been controlled in the following various ways: a) the voltage at the photosensitive layer 10 at a point of time whereat it has passed the contact charging sheet 71 is caused to interlock with grid voltage so as not to exceed predetermined voltage to be electrified by the Scorotron charger 2; b) the applied voltage is caused to interlock with the output from the transfer unit 5 so that there is no portion which reaches the Scorotron charger 2 while the potential polarity has been reversed at the transfer unit 5; c) reduction in the film thickness of the photosensitive layer 10 is corrected in consideration of the cumulative number of sheets for image formation; d) the size of printing sheet is added; e) at the time of termination, a portion of the photosensitive layer 10, into which current has flowed at the transfer unit 5, is caused to stop always after passing the contact charging sheet 71; f) the contact charging sheet 71 is cleaned by means of AC component; and g) the applied voltage is switched while formation of an electrostatic latent image and the like are not performed. Thereby, the surface potential at the photosensitive drum 1 is prevented from becoming ununiform.
    • 接触充电片71的施加电压已经以下列各种方式进行了控制:a)使感光层10在已经通过接触充电片71的时间点处的电压与电网电压互锁,使得不 超过预定电压由Scorotron充电器2带电; b)使施加的电压与转印单元5的输出互锁,使得在转印单元5处的电位极性已经反转的情况下,没有到达Scorotron充电器2的部分; c)考虑到用于图像形成的片材的累积数量来校正感光层10的膜厚度的减小; d)添加打印纸的尺寸; e)在终止时,使电流在转印单元5处流动的感光层10的一部分在通过接触充电片71之后始终停止; f)接触充电片71通过AC部件清洁; 并且g)在不形成静电潜像等的情况下切换所施加的电压。 由此,能够防止感光鼓1的表面电位变得不均匀。