摘要:
Deteriorating developer including toner and carrier in a developer container is replaced by supplying carrier developer including carrier from a developer supply unit and discharging an amount of the deteriorated developer corresponding to the amount of the supplied carrier developer through a discharge opening formed in the developer container by opening a cover. The cover is driven by a solenoid for discharging. With this structure, even when the amount of developer in the developer container is changed and the surface level of the developer is changed, a predetermined amount of deteriorated developer is accurately discharged according to the driving of the cover. It is thus possible to control in a desired manner the replacement ratio of deteriorated developer in the developer container to new developer to be supplied. With this configuration, it is possible to maintain the charge of developer substantially uniform and good image quality of copies.
摘要:
In an electrophotographic apparatus according to the present invention, carrier is gradually supplied to a developing device and a developer is gradually discharged from the developing device through a developer discharge opening. The upper body of a copying machine is free to move upward round a supporting point. The developer discharge opening is formed in a portion of the developing device remotest from the supporting point. This arrangement prevents the developer from spilling from the developer discharge opening when the upper body of the copying machine is opened. Moreover, the developer discharge opening is provided with a shutter device which closes the developer discharge opening (1) when opening the upper body of the copying machine, (2) when removing the developing device from the copying machine, (3) when removing a waste container from the developing device, or (4) for a predetermined period during a copying operation. Consequently, there is no need to concern about spilling the developer from the developer discharge opening, and the developer is easily maintained and handled.
摘要:
A waste toner collecting system in an image forming apparatus which forms on the surface of an image carrier an electrostatic latent image corresponding to an original image, develops the latent image with toner and transferrs the toner image onto a copy material. The waste toner collecting system comprises a cleaning unit for removing residual toner from the image carrier after the toner image has been transferred, a container, independent of the cleaning unit, for storing the removed waste toner, and a transport device for conveying the waste toner removed by the cleaning unit to the container, with an outlet formed in the toner transport device so as to discharge the waste toner, a waste toner inlet formed in the container at a position corresponding to the outlet in the toner transport device, and shutter members provided for the outlet and the inlet, respectively, the shutter members being opened or closed according to as the waste toner container is mounted or dismounted.
摘要:
Bidirectional communication is carried out between a toner bottle end communication device disposed in a toner bottle and a main body end communication device disposed in a device main body while the toner bottle is moved from a first position where the toner bottle starts being attached to the device main body to a second position where the toner bottle is completely attached. The CPU provided in the main body end communication device decides whether or not the information on the toner bottle received from the toner bottle end communication device matches the device main body, and notifies prior to toner refilling. If the toner bottle is not suitable, the CPU specifies a lower quality image forming condition under which operation conditions for the main charging device, exposure device, and fixing device are changed so as to produce an image of relatively low quality in comparison to normal quality. The user can single out a bogus product among unsuitable toner bottles by identifying a degradation in the quality of the image produced by that condition.
摘要:
A document feeder includes: a document detecting device arranged on the top of the copier body, for detecting a document inserted from the outside; a feed roller arranged adjacent to the document detecting device, on the top of the copier body, for feeding an inserted document into a space between the original table and the original cover, in response to the detection of a document by the document detecting device; and an original cover lifting device arranged on the top of the copier body, for lifting the original cover to create a gap between the original table and the original cover, in response to the detection of a document by the document detecting device. Alternatively, the feed roller further has a rotary cam on its shaft, so that the cam rotates to lift the original cover up as the feed roller rotates in the document feeding direction. Then, after the document is fed in place, the feed roller is reversely rotated in a constant time, whereby the document cover is sunk to press the document onto the original table.
摘要:
A box-shaped container (10) has an opening (12) and the opening is sealed tightly and doubly by a sealing material (13). The sealing material is hot-glued to a peripheral portion of the opening of the cartridge body to such an extent that the sealing material can be peeled from the peripheral part. The end portion (13a) of the sealing material is bonded at an adequate length from the free end to the face 11a of a side of the peripheral portion, and the free end portion is turned down for 180 degree angle to the outer side of the opening. Furthermore, the sealing material is bonded to the face (11b) of a opposite side of the peripheral portion side at which the free end portion (13a) is adhered and turned down to cover the opening in double covering. The sealing material also covers the turned-down end portion. The other end portion (13b) of the sealing material is attached to a roller (16), and as the user turns a handle (18) of the roller, the sealing material can be peeled off easily.
摘要:
A developer material supply arrangement which includes a developer hopper mounting portion for detachably mounting a developer hopper on the mounting provided portion at an opening at the upper portion of a developing tank of an electrophotographic copying apparatus, a hopper-shaped container for a developer material, a supply port provided at a lower portion of the hopper-shaped container and formed into a configuration which can be detachably mounted with respect to the developer hopper mounting portion, and a valve member provided within the supply port for selective opening or closing of the supply port.
摘要:
To meet a main unit downsized and provided with a lot of functions and an interchangeable part made to be versatile by simplification of manufacturing work, thereby preventing increase of the manufacturing cost and decrease of practical utility. When a toner cartridge is mounted to a developing section, a detecting electrode contacts the surface of a first dielectric layer at a position opposed to a pattern electrode of a recognizing portion, and a return electrode of a detecting section contacts the surface of the first dielectric layer at a position opposed to an entire electrode of the recognizing portion. The first dielectric layer is interposed between the detecting electrode and the pattern electrode, and the first dielectric layer and a second dielectric layer are interposed between the return electrode and the entire electrode. When an AC voltage is applied from an AC power source to the detecting electrode, an AC current passes from the detecting electrode to the pattern electrode through the first dielectric layer. The AC current having passed to the pattern electrode passes to the entire electrode through the second dielectric layer, and returns to the return electrode after passing through the second dielectric layer and the first dielectric layer in this order.
摘要:
A feed roller for feeding a document is disposed between a control panel and an original table on the top of a copier body. A document stocker provided rotatably relative to an original cover on the original table is rotated so as to cover the control panel, whereby the original cover is raised from the original table to create some clearance. In this situation, a document is inserted through the document stocker from a document inserting port. The document thus inserted is detected by the operation of a detecting lever, which activates the feed roller to convey the inserted document to the original table. As the rear part of the document thus conveyed is detected by the operation of the detecting lever, the feed roller is deactivated. In this condition, copying operation is carried out so that an image of the document conveyed onto the original table is formed.
摘要:
A developing apparatus which includes a developing section disposed to confront a recording medium for effecting development, and a device for supplying developing material to the developing section. The developing device is characterized in that there is mounted a stirring device rotatably provided in a supply passage for supplying the developing material to the developing section, and shutter plates are provided on an outer periphery of the stirring device so as to be controlled for rotation, thereby selectively closing or opening the supply passage.