Abstract: 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.

Abstract: A liquid crystal display device includes a color filter including a filter portion and a black mask which is arranged around the filter portion and shields light, a liquid crystal panel including a liquid crystal portion including a display region corresponding to the filter portion, and a protection cover which is arranged on a display side of the liquid crystal panel and is made of a translucent material. The protection cover includes an intermediate layer having a pattern in which a partial light shielding region and a partial light transmitting region are mixed corresponding to a part of the black mask arranged outside the filter portion, and a light shielding layer arranged outside the intermediate layer and having the same material and color as the partial light shielding region.

Abstract: A liquid crystal display device includes a color filter including a filter portion and a black mask which is arranged around the filter portion and shields light, a liquid crystal panel including a liquid crystal portion including a display region corresponding to the filter portion, and a protection cover which is arranged on a display side of the liquid crystal panel and is made of a translucent material. The protection cover includes an intermediate layer having a pattern in which a partial light shielding region and a partial light transmitting region are mixed corresponding to a part of the black mask arranged outside the filter portion, and a light shielding layer arranged outside the intermediate layer and having the same material and color as the partial light shielding region.

Abstract: 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.

Abstract: A developing device includes a rotatable developer carrying member configured to carry a developer, and a regulating unit, formed of a resin material, configured to regulate an amount of the developer carried on the developer carrying member. The regulating unit includes a regulating portion configured to regulate the amount of the developer carried on the developer carrying member and a guiding portion, connected with an upstream end of the regulating portion with respect to a rotational direction of the developer carrying member, configured to guide the developer toward the regulating portion.

Abstract: In an image forming apparatus that includes a collection container for collected toner, the collection container is not easily pushed back by a reaction force against a closing force of a shutter provided in a feeding portion for the collected toner. A spiral rib guides a contact rib to move the sealing shutter in a direction of opening a transfer opening against an urging force of a twisted coil spring in the process of connecting a collected toner box to a feeding pipe. A low reaction force area guides the contact rib after the spiral rib in the process of connecting the collected toner box to the feeding pipe. An inclination angle of the low reaction force area relative to the direction of connecting the collected toner box is less than an inclination angle of the spiral rib relative to the direction of connection of the collected toner box.

Abstract: A developing device includes a rotatable developer carrying member configured to carry a developer, and a regulating unit, formed of a resin material, configured to regulate an amount of the developer carried on the developer carrying member. The regulating unit includes a regulating portion configured to regulate the amount of the developer carried on the developer carrying member and a guiding portion, connected with an upstream end of the regulating portion with respect to a rotational direction of the developer carrying member, configured to guide the developer toward the regulating portion.

Abstract: 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.

Abstract: To provide an image forming apparatus in which a collection container for collected toner is not easily pushed back by a reaction force against a closing force of said shutter provided in a feeding portion for the collected toner. A spiral rib 52b guides a contact rib 37e to move a sealing shutter 52 in a direction of opening a transfer opening 51a against an urging force of a twisted coil spring 53 in the process of connecting the collected toner box 30 to a feeding pipe. A low reaction force area 52c guides the contact rib 37e after the spiral rib 52b in the process of connecting the collected toner box 30 to the feeding pipe. An inclination angle of the low reaction force area 52c relative to the direction of connecting the collected toner box 30 is smaller than an inclination angle of the spiral rib 52b relative to the direction of connection of the collected toner box 30.

Abstract: A developing device includes a developer 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 a 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 monotonically decreases toward the downstream side of the developer feeding direction.

Abstract: A layer thickness regulating member regulates an amount of developer carried on a surface of a developer carrying member and includes a base portion and a layer thickness regulating portion. The base portion includes an upstream base portion and a downstream base portion. A reinforcing rib portion projects from a rear side of the base portion and includes a first reinforcing rib and a second reinforcing rib disposed in a direction crossing the first reinforcing rib. The base portion, the layer thickness regulating portion, and the reinforcing rib portion are integrally molded. The layer thickness regulating portion and the first reinforcing rib are provided at positions spaced from each other with respect to a tangential direction of the developer carrying member.

Abstract: An image forming apparatus that can prevent a protection cover from being detached from an apparatus main body when the attaching of a process cartridge is completed, with a simple structure includes a biasing portion that can bias the process cartridge. The biasing portion applies biasing force in such a manner that a distal end portion of the protection cover is sandwiched between the apparatus main body and the process cartridge when the process cartridge is attached to the apparatus main body. This structure can prevent the protection cover from being detached from the apparatus main body at a time when the attaching of the process cartridge is completed.

Abstract: 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. No substantial rib portion dividing the space with respect to a longitudinal direction of said layer thickness regulating member is provided.

Abstract: A belt feeding device for an image forming apparatus includes a movable endless belt, and a steering unit configured to be tilted for moving the endless belt in a widthwise direction crossing with a moving direction of the endless belt. The steering unit includes a rotatable roller configured to stretch the endless belt and to be rotatable with a movement of the endless belt, a shaft configured to rotatably support the rotatable roller, and a pair of supporting members configured to support the shaft at end portions with respect to the widthwise direction. The supporting members having sliding surfaces respectively for applying frictional forces by sliding relative to an inner surface of the endless belt. In addition, a frame is configured to tiltably support the steering unit.

Abstract: An image forming apparatus that can prevent a protection cover from being detached from an apparatus main body when the attaching of a process cartridge is completed, with a simple structure includes a biasing portion that can bias the process cartridge. The biasing portion applies biasing force in such a manner that a distal end portion of the protection cover is sandwiched between the apparatus main body and the process cartridge when the process cartridge is attached to the apparatus main body. This structure can prevent the protection cover from being detached from the apparatus main body at a time when the attaching of the process cartridge is completed.

Abstract: An image forming apparatus includes first and second image bearing drums; first and second developing devices for forming a toner image on the drums; an intermediary transfer member for carrying images transferred front the drums and secondary transferring the toner image onto a recording material; a heater for heating the recording material; an executing portion for executing a first mode for forming a toner image on the intermediary transfer member from both drums and a second mode for forming a toner image on the intermediary transfer member only from the second drum; a temperature detecting portion; a fan; a controller for controlling the fan based on a detected temperature; a setting portion for setting a temperature at which an air feed amount of the fan is increased in the second mode is lower than a temperature at which the all feed amount is increased in the first mode.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A belt feeding apparatus has a rotatable belt, first and second belt stretching members, and a steering unit which has a rotatable portion rotatable with rotation of the belt, a frictional portion, and a supporting portion for supporting the rotatable portion. The frictional portion is provided with an inclined surface so that the distance between the rotational axis of the rotatable portion and the surface of the frictional portion increases toward an outside with respect to the direction of a rotational axis of the rotatable portion, and a length of the belt member with respect to the rotational axis direction of the rotatable portion is longer than a length of the rotatable portion and is shorter than a sum of the lengths of the rotatable portion and the frictional portions provided at respective ends, and the belt member contacts both of the frictional portions simultaneously.