Patent application number | Description | Published |
20090245871 | ROTARY MEMBER DRIVING APPARATUS - A rotary member apparatus includes a main drive unit configured to apply a driving torque to a photosensitive drum through a drive transfer unit, a torque limiter configured to limit the driving torque transmitted from the main drive unit to the photosensitive drum, a compensation drive unit configured to apply a torque for adjusting an angular velocity of the photosensitive drum, an encoder configured to detect the angular velocity of the photosensitive drum, and a compensation drive controller configured to control the torque applied by the compensation drive unit on the basis of a detection result obtained by the encoder. | 10-01-2009 |
20100158551 | IMAGE-FORMING APPARATUS - An image-forming apparatus includes an image-bearing member configured to bear an image, a transfer belt to which the image on the image-bearing member is transferred and configured to transfer the image onto a sheet, a first drive unit configured to drive the image-bearing member to rotate, a second drive unit configured to drive the transfer belt to rotate via a speed reduction member interposed therebetween, a detection unit configured to detect a circumferential speed of the transfer belt, and a control unit configured to control the first drive unit in accordance with the circumferential speed of the transfer belt detected by the detection unit. | 06-24-2010 |
20100303513 | IMAGE FORMING APPARATUS - An image forming apparatus includes a rotatable belt member; a stretching roller for stretching the belt member; a plurality of line-like marks which are arranged in a rotational direction of the belt member and are formed stepwisely on a surface of the belt member; the marks being tilted from a rotational axis direction of the belt member at least at end portions thereof on sides close to an end surface of the belt member; and control means for controlling rotation of the belt member on the basis of a result of detection of the marks. | 12-02-2010 |
20130243463 | IMAGE HEATING APPARATUS - An image heating apparatus includes: an endless belt including a heat generating layer configured to generate heat by electric energy and a conductive layer configured to be electrically connected to the heat generating layer; a rotatable driving member configured to drive the belt and form a nip with the belt; an electric contact portion provided to be in contact with the conductive layer and configured to supply the electric energy to be conductive layer; an electric insulation portion contactable to the electric contact portion with rotation of the belt; a detecting portion configured to detect whether an electric conduction state between the electric contact portion and the conductive layer is in a predetermined state or not when the belt is rotated; and a control portion configured to control a peripheral speed of the rotatable driving member using an output of the detecting portion. | 09-19-2013 |
20140255061 | DEVELOPING DEVICE - A developing device includes: a developer carrying member (sleeve); a regulating portion including an edge portion at a closest position to a surface of the sleeve or a flat portion tilted, at the closest position, by an angle of 2 degrees or less relative to a contact flat plane contacting the surface of the sleeve; and a rectifying portion connected with the edge or flat portion. The rectifying portion has a concavely curved surface such that a rate of a decrease in gap between the rectifying portion and the contact flat plane increases toward a downstream side of the developer feeding direction and is formed by smoothly connecting rectilinear or curved lines each of 0.2 mm or less except for the edge portion so that the gap between the rectifying portion and the contact flat plane is monotonically decreases toward the downstream side of the developer feeding direction. | 09-11-2014 |
20150043948 | LAYER THICKNESS REGULATING MEMBER, DEVELOPING DEVICE AND PROCESS CARTRIDGE - A layer thickness regulating member includes: an opposing portion opposing a peripheral surface of a developer carrying member; a layer thickness regulating portion, projecting from the opposing portion toward the developer carrying member, for regulating a layer thickness of a developer carried on the developer carrying member; and a rib portion provided in a side, of the opposing portion, opposite from the layer thickness regulating portion. The opposing portion, the layer thickness regulating portion and the rib portion are integrally molded. The rib portion is disposed at a non-overlapping position with a region, at least in an image forming region, corresponding to a region where the layer thickness regulating portion is formed at the opposing portion. | 02-12-2015 |
20150043950 | DEVELOPING DEVICE AND LAYER THICKNESS REGULATING MEMBER - A developing device includes: a developer carrying member and a layer thickness regulating member. The layer thickness regulating member includes: an opposing portion, a regulating portion, side wall portions, and a plurality of rib portions each extending from the side wall portion in one end side to the side wall portion in the other end side with respect to the rotational axis direction of the developer carrying member. A space is formed by being defined by the side wall portions and the rib portions. Substantial no rib portion dividing the space with respect to a longitudinal direction of said layer thickness regulating member is provided. | 02-12-2015 |
20150063867 | IMAGE CARRIER UNIT AND IMAGE FORMING APPARATUS - An image carrier unit includes an engage mechanism configured to attach a protection cover slidably to a unit casing in a rotational axis direction of an image carrier. The engage mechanism includes first and second engage mechanisms. The first engage mechanism includes a first engage portion provided at a first end portion in a width direction orthogonal to the rotational axis direction of the protection cover and a first engaged portion provided in the unit casing and engaged with the first engage portion, and is configured such that the first engage portion engages with the first engaged portion in orientation to one side in the width direction. The second engage mechanism is also configured such that a second engage portion engages with a second engaged portion in orientation to the one side in the width direction. | 03-05-2015 |