Abstract: A sheet stacking apparatus includes a sheet stacking portion to be mounted into and drawn out of a mounting portion and provided with a side plate including a grip portion by which the sheet stacking portion can be drawn out in the draw-out direction. The sheet stacking portion is supported to be slidable in a draw-out direction by a rail, and the rail is supported to be slidable in the draw-out direction by a rail supporting portion provided in the mounting portion. A rotator is provided on either the rail supporting portion or the rail and disposed in contact with the other of the rail supporting portion and the rail. The rail, the rail supporting portion and the rotator are disposed on one side in the width direction of the sheet stacking portion, and the grip portion is disposed on the other side in the width direction.

Abstract: A sheet stacking apparatus includes a sheet stacking portion to be mounted into and drawn out of a mounting portion and provided with a side plate including a grip portion by which the sheet stacking portion can be drawn out in the draw-out direction. The sheet stacking portion is supported to be slidable in a draw-out direction by a rail, and the rail is supported to be slidable in the draw-out direction by a rail supporting portion provided in the mounting portion. A rotator is provided on either the rail supporting portion or the rail and disposed in contact with the other of the rail supporting portion and the rail. The rail, the rail supporting portion and the rotator are disposed on one side in the width direction of the sheet stacking portion, and the grip portion is disposed on the other side in the width direction.

Abstract: Provided is a driving force transmission device including: an actuator (22) that, in a case where one of a first annular gear (11), a second annular gear (14), and a carrier (16) is an input member, another one is an output member, and the remaining one is a rotational member, causes one of the input member and the output member to rotate integrally with the rotational member. When driving force is inputted from the drive source to the input member and input member is rotated unidirectionally, the rotation direction of the output member in the case where one of the input member and the output member rotates integrally with the rotational member is reversed with respect to that in a case where one of the input member and the output member does not rotate integrally with the rotational member.

Abstract: Provided is a driving force transmission device including: an actuator (22) that, in a case where one of a first annular gear (11), a second annular gear (14), and a carrier (16) is an input member, another one is an output member, and the remaining one is a rotational member, causes one of the input member and the output member to rotate integrally with the rotational member. When driving force is inputted from the drive source to the input member and input member is rotated unidirectionally, the rotation direction of the output member in the case where one of the input member and the output member rotates integrally with the rotational member is reversed with respect to that in a case where one of the input member and the output member does not rotate integrally with the rotational member.

Abstract: Provided is a driving force transmission device including: an actuator (22) that, in a case where one of a first annular gear (11), a second annular gear (14), and a carrier (16) is an input member, another one is an output member, and the remaining one is a rotational member, causes one of the input member and the output member to rotate integrally with the rotational member. When driving force is inputted from the drive source to the input member and input member is rotated unidirectionally, the rotation direction of the output member in the case where one of the input member and the output member rotates integrally with the rotational member is reversed with respect to that in a case where one of the input member and the output member does not rotate integrally with the rotational member.

Abstract: Provided is a driving force transmission device including: an actuator (22) that, in a case where one of a first annular gear (11), a second annular gear (14), and a carrier (16) is an input member, another one is an output member, and the remaining one is a rotational member, causes one of the input member and the output member to rotate integrally with the rotational member. When driving force is inputted from the drive source to the input member and input member is rotated unidirectionally, the rotation direction of the output member in the case where one of the input member and the output member rotates integrally with the rotational member is reversed with respect to that in a case where one of the input member and the output member does not rotate integrally with the rotational member.

Abstract: An electrophotographic image forming apparatus for forming an image on a recording medium includes: a light emitting member having multiple light emitting elements provided side-by-side along a direction of an axis of an electrophotographic photosensitive drum of a process cartridge removably mounted to a mounting portion to subject the drum to exposure according to image information; a light emitting member support which supports the light emitting member, and is movable between an exposure position, at which the drum is subjected to exposure, and a retracted position, at which the light emitting member is retracted from the exposure position; and a moving member configured to move the light emitting member support between the exposure position and the retracted position in a state in which the light emitting member keeps parallel to the axis of the drum.

Abstract: An electrophotographic image forming apparatus for forming an image on a recording medium includes: a light emitting member having multiple light emitting elements provided side-by-side along a direction of an axis of an electrophotographic photosensitive drum of a process cartridge removably mounted to a mounting portion to subject the drum to exposure according to image information; a light emitting member support which supports the light emitting member, and is movable between an exposure position, at which the drum is subjected to exposure, and a retracted position, at which the light emitting member is retracted from the exposure position; and a moving member configured to move the light emitting member support between the exposure position and the retracted position in a state in which the light emitting member keeps parallel to the axis of the drum.

Abstract: The image heating apparatus includes a rotary member that comes into contact with a toner image borne on a recording material, a backup member that forms a nip portion to pinch and convey the recording material with said rotary member, wherein said rotary member heats the toner image on the recording material in the nip portion, a cover member that covers a surface of said rotary member with a gap between the surface of said rotary member and the cover member and a frame that accommodates said rotary member, said backup member and said cover, wherein said cover is not in contact with said frame. This structure can suppress heat dissipation to the exterior of the image heating apparatus, thus suppressing the energy consumption.

Abstract: An image forming apparatus includes a substantially horizontally arranged image bearing member; a developing unit, including a plurality of developing devices and supporting the developing devices rotatably relative to the image bearing member; a movable intermediate transfer belt supported by first and second rotation members and facing the developing unit; a primary transfer member forming, together with the image bearing member, a primary transfer portion located near the first rotation member in a moving direction of the intermediate transfer belt, through the intermediate transfer belt; and a secondary transfer member forming, together with the second rotation member, a secondary transfer portion through the intermediate transfer belt. A toner image formed on the image bearing member by the developing unit is transferred on the intermediate transfer belt at the primary transfer portion, and is transferred on a recording material at the secondary transfer portion.

Abstract: An image forming apparatus includes a substantially horizontally arranged image bearing member; a developing unit, including a plurality of developing devices and supporting the developing devices rotatably relative to the image bearing member; a movable intermediate transfer belt supported by first and second rotation members and facing the developing unit; a primary transfer member forming, together with the image bearing member, a primary transfer portion located near the first rotation member in a moving direction of the intermediate transfer belt, through the intermediate transfer belt; and a secondary transfer member forming, together with the second rotation member, a secondary transfer portion through the intermediate transfer belt. A toner image formed on the image bearing member by the developing unit is transferred on the intermediate transfer belt at the primary transfer portion, and is transferred on a recording material at the secondary transfer portion.

Abstract: The image heating apparatus includes a rotary member that comes into contact with a toner image borne on a recording material, a backup member that forms a nip portion to pinch and convey the recording material with said rotary member, wherein said rotary member heats the toner image on the recording material in the nip portion, a cover member that covers a surface of said rotary member with a gap between the surface of said rotary member and the cover member and a frame that accommodates said rotary member, said backup member and said cover, wherein said cover is not in contact with said frame. This structure can suppress heat dissipation to the exterior of the image heating apparatus, thus suppressing the energy consumption.

Abstract: Disclosed is a fixing apparatus which includes a first rotatable member having an endless configuration, and a second rotatable member in pressure contact with the first rotatable member which causes a recording material bearing an image to be nipped and conveyed at a pressure contact portion between the first and second rotatable members. A temperature raising unit is provided for raising temperature of a local portion of the first rotatable member by reception of electric power supply, and a temperature detecting unit detects a temperature of a location different from the pressure contact portion with respect to a rotational direction of the first rotatable member. A first control unit is provided for feedback-controlling electric power to be supplied to the temperature raising unit, and a second control unit is provided for temporally supplying electric power corresponding to a set value set by a setting unit to the temperature raising unit.

Abstract: An image heating apparatus includes a rotation made of a metal, a heater to which a current is applied, whereby heat dissipates from the heater and the heater contacts an internal surface of the rotation member, and a pressure roller for pressurizing the rotation member together with the heater to form a nip, wherein the rotation member is electrically grounded via a fuse. By the virtue of the invention, it is rendered possible to suppress charging of the metal rotation member and to suppress a current leak to a main frame of an image forming apparatus.

Abstract: In a fixing apparatus using a fixing belt having an elastic layer as a fixing member and an image forming apparatus mounting such a fixing apparatus thereto, before a temperature detecting unit detects temperature change caused upon recording material conveying into a nip region, an electric power required to be applied to a heating element to heat the heating element is corrected to a predetermined electric power, and, when the fixing apparatus is started-up upon starting of print, at a predetermined timing, the electric power required to be applied to the heating element to heat the heating element is corrected to the predetermined electric power and a value of the predetermined electric power is substantially the same as an electric power value required for reaching the fixing apparatus to the predetermined power. The value of the predetermined power is determined in accordance with heat capacity of the recording material or a heat accumulating degree of the fixing apparatus on demand.

Abstract: The heating apparatus includes a first temperature detecting element disposed at least in proximity to a moving member, a second temperature detecting element for detecting the temperature of the heating member or the atmospheric temperature of the apparatus, a controlling portion for controlling electric power supply to the heating member, and a judging portion for judging on the basis of the result of the detection by the second temperature detecting element whether the electrical energization of the heating member should be effected before the start of the movement driving of the moving member, whereby temperature control is effected accurately and at the same time, the slip of the moving member, any increase in driving torque, etc. are prevented.

Abstract: Disclosed is a fixing apparatus which includes a first rotatable member having an endless configuration, a second rotatable member in pressure contact with the first rotatable member which causes a recording material bearing an image to be nipped and conveyed at a pressure contact portion between the first and second rotatable members, a temperature raising unit for raising temperature of a local portion of the first rotatable member by reception of electric power supply, a temperature detecting unit for detecting temperature of a location different from the pressure contact portion with respect to a rotational direction of the first rotatable member, a first control unit for feedback-controlling electric power to be supplied to the temperature raising unit based on the temperature detected by the temperature detecting unit, a setting unit for variably setting a set value corresponding to electric power to be supplied to the temperature raising unit, based on a temperature rise speed detected by the temperatu

Abstract: Disclosed is a fixing apparatus which includes a first rotatable member having an endless configuration, a second rotatable member in pressure contact with the first rotatable member which causes a recording material bearing an image to be nipped and conveyed at a pressure contact portion between the first and second rotatable members, a temperature raising unit for raising temperature of a local portion of the first rotatable member by reception of electric power supply, a temperature detecting unit for detecting temperature of a location different from the pressure contact portion with respect to a rotational direction of the first rotatable member, a first control unit for feedback-controlling electric power to be supplied to the temperature raising unit based on the temperature detected by the temperature detecting unit, a setting unit for variably setting a set value corresponding to electric power to be supplied to the temperature raising unit, based on a temperature rise speed detected by the temperatu

Abstract: An image heating apparatus for heating an image formed on a recording material, including a heater, a holder for holding the heater, a rotating member rotating around the holder and being flexible and having a metal layer, and a pressure roller forming a nip with the heater across the rotating member, wherein the rotating member moves detaching from the pressure roller just after passing through a downstream end portion of a surface of the heater opposed to the pressure roller. Thus, an uneven heating of a toner image can be prevented even in a case where the recording material becomes undulated after passing the nip portion.

Abstract: An image heating apparatus includes a rotation made of a metal, a heater to which a current is applied, whereby heat dissipates from the heater and the heater contacts an internal surface of the rotation member, and a pressure roller for pressurizing the rotation member together with the heater to form a nip, wherein the rotation member is electrically grounded via a fuse. By the virtue of the invention, it is rendered possible to suppress charging of the metal rotation member and to suppress a current leak to a main frame of an image forming apparatus.