Patent application number | Description | Published |
20100028025 | IMAGE FORMING APPARATUS - An image forming apparatus includes a process cartridge. In the case where the process cartridge is a fresh cartridge, after toner (developer) is sufficiently fed to a developer carrying member in the entire longitudinal area of the developer carrying member, an initializing operation for depositing the toner on a contact portion between an image bearing member and a cleaning blade. | 02-04-2010 |
20100028026 | IMAGE FORMING APPARATUS - A image forming apparatus includes a photosensitive drum having a high-lubricity state layer. In an initial rotation operation performed after mounting a process cartridge, in a main assembly of the image forming apparatus, a process cartridge in which lubricating particles are not applied in a contact area between a fresh cleaning blade and the photosensitive drum, toner is supplied only by application of a developing bias after the photosensitive drum and a developing sleeve are driven to supply and stagnate the toner in the contact area between the cleaning blade and the photosensitive drum. | 02-04-2010 |
20110058834 | IMAGE FORMING APPARATUS - An image forming apparatus comprising a rotatable image bearing member for carrying a toner image; a charging member for contacting a surface of the image bearing member to discharge the surface; a cleaning blade for contacting the surface of the image bearing member to remove toner remaining on the surface of the image bearing member after a toner image is transferred from said image bearing member onto a transfer material; and a control device for controlling a voltage applied to said charging member; wherein the control device applies to the charging member a first charged potential which includes a peak-to-peak voltage larger than a discharge starting voltage in image forming operation, and applies to the charging member a second voltage which includes a peak-to-peak voltage is smaller than the discharge starting voltage, for at least one full rotation of said image bearing member, after completion of the image forming operation and before an AC voltage component applied to the charging member is shut off. | 03-10-2011 |
20110243580 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image forming apparatus detects the presence or absence of a toner seal and whether a cartridge is loaded on a main body of the image forming apparatus without use of an additional redundant detection means, due to the provision of an electrically-conductive layer at the toner seal for sealing and closing an opening in a process cartridge including a developer container. | 10-06-2011 |
20130022376 | DEVELOPING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A developing device for use with an image forming apparatus, includes a developing roller for carrying a developer and for forming a developer image on an image bearing member; a supplying roller for supplying the developer to the developing roller, wherein the supplying roller has a foam layer at its surface and forms a nip between itself and the developing roller; an accommodating portion, provided below the supplying roller, for accommodating the developer; and a feeding member for feeding the developer from the accommodating portion onto the nip by being rotated in a direction opposite to a rotational direction of the supplying roller. The supplying roller is rotated in a direction which is from a lower end of the nip to an upper end of the nip. The supplying roller is provided so that its top is higher than a top of the developing roller. | 01-24-2013 |
20130108329 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPRATUS | 05-02-2013 |
20130287450 | DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A developing device including a containing unit configured to be arranged below a supply member and contain a developer and a developer bearing member configured to bear the developer and develop an electrostatic latent image, further includes a supply member which is configured to supply the developer to the developer bearing member, to be arranged to form a nip portion between the supply member and the developer bearing member, and to rotate in a direction in which its surface moves from an upper end to a lower end of the nip portion, and a conveyance member which is configured to convey the developer contained in the containing unit onto the supply member. | 10-31-2013 |
20130287451 | IMAGE FORMING APPARATUS, DEVELOPING APPARATUS, AND PROCESS CARTRIDGE - A developing roller configured to develop an electrostatic latent image on a photosensitive drum, a supply roller configured to supply developer to the developing roller are provided, and the surface of the developing roller moves in the same direction as the surface of the photosensitive drum and at a speed higher than the photosensitive drum at a nip portion between the photosensitive drum and the developing roller, the surface of the supply roller moves in the same direction as the surface of the developing roller and at a speed higher than the developing roller at a nip portion between the developing roller and the supply roller. | 10-31-2013 |
20130287452 | DEVELOPMENT DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - In a development device in which a developer containing unit underlies a development chamber, a supplying member in the development chamber forms a nip portion with a developer carrier and the developer carrier and the supplying member rotate in the direction in which their respective surfaces move from an upper end to a lower end of the nip portion. | 10-31-2013 |
20130287453 | DEVELOPING APPARATUS AND PROCESS CARTRIDGE - A developing apparatus, including: a developer carrying member; a developer feeding member configured to feed the developer to the developer carrying member in abutment with the developer carrying member; and a developer regulating member having a distal end portion directed toward an upstream side in a rotation direction of the developer carrying member, and configured to regulate a layer thickness of the developer on the developer carrying member in abutment with a surface thereof. Surfaces of the developer carrying member and the developer feeding member move in the same direction in an abutment portion. The distal end portion of the developer regulating member has a developer taking-in portion away from the surface of the developer carrying member toward the upstream side in the rotation direction. The developer taking-in portion is positioned upstream of an abutment position between the developer regulating member and the developer carrying member. | 10-31-2013 |
20140119757 | IMAGE FORMING APPARATUS - An image forming apparatus includes a control unit controlling first and second voltage application mechanisms and shifting a difference Vdif (=Vrs−Vdr) between Vrs and Vdr toward polarity opposite to normal charge polarity of a developer as S decreases, where S is an absolute value of a speed difference between a circumferential speed of an image bearing member, which rotates while bearing an electrostatic latent image and a circumferential speed of a developer bearing member, which rotates at a constant circumferential speed ratio with respect to the image bearing member to develop the electrostatic latent image while bearing the developer, Vdr is a voltage that the first voltage application mechanism applies to the developer bearing member, and Vrs is a voltage that the second voltage application mechanism applies to the developer supply member. | 05-01-2014 |
20140153990 | CLEANING DEVICE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - A cleaning device includes: a fixing portion provided on a frame; a cleaning member; and an accommodating portion. The cleaning member includes: a blade portion contacted to an image bearing member (drum); and a supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the another end portion in a side remote from a surface of the drum toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the drum. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the drum. Between the frame and the another end portion, a gap for permitting elastic deformation of the another end portion is provided. | 06-05-2014 |