摘要:
In a developing system containing a combination of forward-rotating and a backward-rotating developing rollers, a steady quantity of developing agent should be supplied to the developing rollers for high-quality printed images. This requirement can be satisfied by placing a doctor blade between an intersection point, where a line connecting the central axis of one of the developing rollers and its polarity reversing position meets a line connecting the central axis of the other of the developing rollers and its polarity reversing position, and the developing roller pair. Further, the doctor blade should be located on the upstream side of the developing agent flow relative to the central axes of the backward-rotating developing roller and the forward rotating developing roller with its rightmost side (upstream side) in parallel with the line connecting the central axes of the developing rollers, and the doctor gap (on the side of the developing roller to which the developing agent is supplied) should be greater than a minimum gap (doctor gap) between one end of the doctor blade and the surface of the developing roller to which the developing agent is first supplied.
摘要:
A uniform image is obtained by matching the sliding friction force, the moving speed and the developing agent in a developing region of two developing rollers and an electric characteristic of a photosensitive body used for image development. Two developing rollers rotating in directions opposite to each other are used, the moving direction of the first developing roller being opposite to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the first developing roller to a circumferential speed of the photosensitive body is within a rage of 0.5 to 2.5; and the moving direction of the second developing roller is equal to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the second developing roller to a circumferential speed of the photosensitive body is within a range of 1.5 to 3.5. A ratio of the sliding friction force between a magnetic brush for developing agent and the photosensitive body formed in the first developing roller and the sliding friction force between a magnetic brush for developing agent and the photosensitive body formed in the second developing roller is within a range of 0.9 to 2.1.
摘要:
An image forming apparatus includes: a first image forming unit having a first printing section for forming a first image on the paper; a second image forming unit having a second printing section for forming a second image on the paper; and a paper conveying unit for conveying the paper from the first image forming unit to the second image forming unit. Accordingly, two kinds of image can be formed employing one image forming apparatus. The first image and the second image may be formed using the same recording material (toner) or different recording materials (toners).
摘要:
In an image forming apparatus, the absolute value (.vertline.VBH-VM.vertline.) of the potential difference between a first development bias electric potential (VBH) and an intermediate electric potential (VM) is set to be smaller (.vertline.VBH-VM.vertline.
摘要:
An electrostatic recording apparatus including: an image carrier including an organic photoconductive photoreceptor having an abrasion-resisting outermost periphery; an exposing unit which exposes the image carrier to form an electrostatic latent image thereon; a developing unit which contains a toner and develops the electrostatic latent image with the toner to form a toner image; a transferring unit which transfers the toner image thus formed onto a recording medium; and a fixing unit which fixes the transferred toner image on said recording medium, wherein the toner contained in said developing unit includes an electrically conductive fine powder attached to the surface thereof.
摘要:
A vacuum fluorescent display apparatus comprising a filament cathode (10) and an anode (7); the filament cathode being arranged in a vacuum container, and used for releasing low-energy electrons; the anode having a phosphor (8) adhering thereto, and being struck by the low-energy electrons and thereby caused to emit light; wherein a structural body (9) is provided to a region in which the low-energy electrons released by the cathode can be controlled; the structural body having an electrically conductive or semi-conductive metal oxide formed at a portion that is bombarded by low-energy electrons.
摘要:
An image forming apparatus includes a detachably replaceable image forming unit for forming an image on a medium, the image forming unit including a component for forming the image on the medium and a first storage section for storing life information, use amount information, and use purpose information of the component; a read-write section for reading and writing information in the first storage section; a life management section for managing life of the image forming unit; and a second storage section for storing the life information and the use amount information read from the first storage section by the read-write section; the life management section rewriting the life information stored in the first storage section by the first storage section in accordance with the use purpose information stored in the first storage section and the use amount information stored in the second storage section.
摘要:
A cooling structure of a rotary electric machine (10) that includes a rotating shaft (16), a rotor (18), and a stator (20) that includes a coil end (22), includes a coolant passage (38) that is included in the rotating shaft (16) and through which coolant flows, and a squirt hole (42) that is included in the coolant passage (38). The squirt hole (42) is included in the coolant passage (38). An opening portion of the squirt hole (42) is positioned on an outer peripheral surface of the rotating shaft (16) and to an outside of the coil end (22) in the axial direction. The squirt hole (42) squirts the coolant such that the coolant is distributed to an inner peripheral surface (C1, C2) of the coil end (22) and an end surface (A1, A2) of the coil end (22) in the axial direction.
摘要:
An image forming apparatus includes: a medium transport path which a medium is transported through; an image forming unit configured to form a developer image on the medium transported through the medium transport path; a fusing unit configured to fix the developer image formed on the medium to the medium; a temperature detecting unit configured to detect temperature in the image forming apparatus; and a controller operable to temporarily stop the transport of the medium in the medium transport path when the temperature detected by the temperature detecting unit is equal to or higher than a predetermined temperature.
摘要:
Ladies' pants has an inside belt portion that is provided with an eyelet buttonhole as a second buttonhole. A moving cloth is provided inside the inside belt portion. A button is sewn on the moving cloth and is taken out from the eyelet buttonhole so as to be movable inside the eyelet buttonhole. If the button is engaged with the second buttonhole, the eyelet buttonhole is hidden under an outside belt portion. Then, the ladies' pants allows a waist size to continuously change, thereby giving a wearer a relaxed and comfortable wearing feeling. A round part of the eyelet buttonhole is located at a position corresponding to nearly a center of the moving cloth when the moving cloth returns to its original position. Then, even if the button is detached, the button can be stitched by scoop sewing through the round part of the eyelet buttonhole. Thus, the button can be surely reattached to the moving cloth.