摘要:
A development apparatus for developing a latent image formed on an image forming body with a developer so as to obtain a toner image. A developer conveyance unit conveys the developer, including a toner, to a development zone, between the developer conveyance unit and the image forming body, from an upstream side of the development zone in a conveyance direction to a downstream side thereof. A plate member having an electrode portion is positioned at the upstream side of the development zone, wherein a downstream end portion of the plate member is positioned in contact with the development zone. A power supply unit applies a first voltage, including a DC component and an AC component, to the developer conveyance unit so that an electric field is generated at the development zone. The power supply unit applies a second voltage, including a DC component, to the electrode portion of the plate member, and the plate member controls the electric field with the second voltage. The development apparatus satisfies: V.sub.AC >.vertline.V.sub.DEN .vertline.-.vertline.V.sub.DC .vertline. when an amplitude of the AC component of the first voltage is defined as V.sub.AC (volts), the DC component of the first voltage is defined as V.sub.DC (volts), and the DC component of the second voltage is defined as V.sub.DEN (volts). The development apparatus satisfies: 10.multidot..vertline.Qt.vertline..multidot.d.sub.t .multidot.D.sub.1 >V.sub.AC >5.multidot..vertline.Qt.vertline..multidot.d.sub.t .multidot.D.sub.2 when a closest distance from the developer conveyance unit to the image forming body is defined as D.sub.1 (mm), a closest distance from the developer conveyance unit to the electrode portion is defined as D.sub.2 (mm), an average charge-to-mass of the toner is defined as Qt (.mu.C/g), and an average particle size of the toner is defined as dt (.mu.m).
摘要:
A non-contact type of developing device for use in an image forming apparatus having an image forming body, includes a developer conveying body facing the image forming body in which a magnet body having a plurality of magnet poles are attached therein, to convey two-component developer in the form of a developer layer onto a developing area and a control electrode provided at the developing area or upstream of the developing area. The control electrode has an electrically insulating member which is in contact with or close to the developing layer, and an electrode to which a voltage is applicable is attached to the insulating member. The following condition is satisfied: ##EQU1## where D.sub.T represents a number of toner layers on the assumption that the toner particles passing through the developing area are filled most densely, D.sub.WS represents a conveying amount (mg/cm.sup.2) of the developer layer at the developing area on the developer conveying body, T.sub.c represents a toner concentration (%) in the developer, dt represents an average sphere equivalent diameter (.mu.m) of toner in the developer, .rho.t represents a toner density (g/cm.sup.3) in the developer, vs represents a circumferential speed (mm/s) of the developer conveying body at the developing area, and vp represents a circumferential speed (mm/s) of the image forming body at the developing area.
摘要翻译:一种用于具有图像形成主体的图像形成装置中的非接触型显影装置,包括:面向图像形成主体的显影剂输送主体,其中附接有多个磁极的磁体, 显影剂层形式的显影剂组分显影剂和设置在显影区域的显影区域或显影区域上游的控制电极。 控制电极具有与显影层接触或靠近显影层的电绝缘构件,并且能够施加电压的电极附着到绝缘构件。 满足以下条件:其中DT代表通过显影区域的调色剂颗粒最密集地填充的调色剂层数,DWS表示显影剂层的输送量(mg / cm 2) 显影剂输送体上的显影区域,Tc表示显影剂中的调色剂浓度(%),dt表示显影剂中调色剂的平均球当量直径(μm),rho表示显影剂输送体中调色剂浓度(g / cm 3) 显影剂vs表示显影剂输送体在显影区域的圆周速度(mm / s),vp表示图像形成体在显影区域的圆周速度(mm / s)。
摘要:
A developing apparatus for developing an electrostatic latent image on an image retainer with two-component developer has a rotatable sleeve having a closest position on which the sleeve comes closest to the image retainer, a first magnet fixed in the sleeve in close proximity to the closest position, a second magnet disposed upstream of the first magnet in relation to a rotation direction of the sleeve and a control electrode member. The control electrode member includes an insulating plate member arranged either to be brought into contact with or to be positioned adjacent to the sleeve and a line-shaped electrode member fixed to the plate member.
摘要:
A biaxial hinge device includes: a first rotation axis mechanism configured to form a first rotation axis by using a substantially cylindrically shaped first shaft member; a first arm portion configured to include a fixing portion fixed to a first case, and provided to the first shaft member of the first rotation axis mechanism; a second rotation axis mechanism configured to include a fixing portion fixed to a second case, and to form a second rotation axis substantially perpendicular to the first rotation axis by using a substantially cylindrically shaped second shaft member; and a second arm portion configured to connect the first rotation axis mechanism to the second rotation axis mechanism such that the first rotation axis mechanism is rotatable around the second rotation axis of the second rotation axis mechanism.
摘要:
A toner cleaning device for removing toner which remains on an organic photoreceptor is provided. The toner cleaning device can include a cleaning blade, a support member of the cleaning blade and a damping material. An image forming method is also provided. The method includes removing toner which remains on an organic photoreceptor by using the toner cleaning device.
摘要:
The invention improves the thermal conductivity of the material powder to be fired and also makes it possible to produce an amorphous magnetically soft body within a shortened period of time. The amorphous magnetically soft body is produced by preforming the material powder into a body first, and heating the preformed body without pressing. Stated more specifically, an amorphous magnetically soft body is produced from a material powder comprising a powder of an amorphous magnetically soft alloy, a glass having a softening point lower than the crystallization starting temperature of the alloy and a binding resin, by pressing the material powder in a preforming die to prepare a preformed body by the binding property of the resin, and firing the preformed body without pressing at a temperature higher than the softening point of the glass and lower than the crystallization starting temperature of the alloy to join the particles of the alloy with the glass.
摘要:
The invention provides a thermoelectric element produced by placing a powder of thermoelectric material over an electrode plate first and then an electrode plate over the power to form superposed layers, and thereafter sintering the powder with a pressure applied thereto perpendicular to the superposed layers. The electrode plates and the thermoelectric material are joined into an integral assembly before fabricating a thermoelectric module. The invention provides a thermoelectric module which is produced by arranging p-type thermoelectric elements and n-type thermoelectric elements alternately in a row at a predetermined interval, each of the elements comprising a thermoelectric material provided between and joined to a pair of opposed electrode plates, and interconnecting pairs of spaced adjacent upper electrode plates and pairs of spaced adjacent lower electrode plates alternately by brazing to electrically connect the p-type and n-type thermoelectric elements in series. Another thermoelectric module of the invention is fabricated by preparing a plurality of submodules each comprising p-type thermoelectric elements and n-type thermoelectric elements arranged alternately in an elongated row and electrically connected in series through electrode plates, arranging the submodules side by side suitably, and brazing the electrode plate of the p-type thermoelectric element at an end position of each submodule to the electrode plate of the n-type thermoelectric element at a corresponding end position of another submodule adjacent to the submodule so as to electrically connect the plurality of submodules in series.
摘要:
A detecting apparatus is disclosed, that comprises plural measurement devices with respective sensors and a support for holding the measurement devices in such a manner that the individual sensors contact a culture broth, the turbidity, dissolved oxygen, dissolved carbon dioxide the temperature, pH, and so forth of the culture broth being obtained by the measurement devices.
摘要:
An object of the present invention is to provide a sensor system which can effect local communications suitable for exchanging information to avoid collisions between mobile robots. The sensor system also prevents collisions between the mobile robots and obstacles. The system is well-suited for a multi-robot environment where multiple mobile robots operate. The system includes infrared signal transmitters installed in each of the multiple mobile robots for sending transmission data via infrared signals. The system further includes infrared signal receivers installed in each of the multiple mobile robots for receiving the transmission data sent by the infrared signal transmitters. Each mobile robot includes a control unit. The control unit prepares transmission information which includes mobile robot identification information unique to the mobile robot. The transmission information is included in the transmission data sent from the infrared signal transmitter. The control unit also extracts transmission information which is received by the infrared signal receiver.
摘要:
A satellite radio wave capturing method of a GPS receiver, in which an offset value of an oscillator of the GPS receiver is calculated by subtracting a Doppler frequency deviation of the first captured satellite radio wave from an actual received frequency of the first captured satellite radio wave, and with respect to the second and subsequent satellite radio waves to be captured, the search center frequencies are reset by using the calculated offset value, and an oscillating frequency of the oscillator is changed by using the set search center frequency as a reference, thereby capturing the radio wave of the target satellite. The elapsed time which is required from the power-OFF at the preceding position measurement by the GPS receiver to the power-ON at the present position measurement is measured. In accordance with the duration of the measured elapsed time, a determination is made to see whether or not the offset value of the oscillator which has been obtained at the preceding position measurement and stored in a memory in the GPS receiver is used as an offset value of the oscillator at the present position measurement. The mean value of a plurality of offset values obtained within a predetermined time just after the power-ON of the GPS receiver is calculated and stored. At the next power-ON of the receiver, the stored mean value of the offset values is used as an initial offset value at the start of the position measurement.