Abstract: An abutting portion that abuts on an operation lever for moving a pressure roller is provided on an inner side of an exterior cover provided so as to be openable and closable with respect to a housing that accommodates a fixing unit. The pressure roller is movable to a first pressing position where the pressure roller presses a heating roller with a first pressing force and to a second pressing position where the pressure roller presses the heating roller with a second pressing force smaller than the first pressing force. In addition, the operation lever is moved to a first position for positioning the pressure roller at the first pressing position and to a second position for positioning the pressure roller at the second pressing position. When the exterior cover is closed while the operation lever is located at the second position, the abutting portion abuts on the operation lever.

Abstract: An abutting portion that abuts on an operation lever for moving a pressure roller is provided on an inner side of an exterior cover provided so as to be openable and closable with respect to a housing that accommodates a fixing unit. The pressure roller is movable to a first pressing position where the pressure roller presses a heating roller with a first pressing force and to a second pressing position where the pressure roller presses the heating roller with a second pressing force smaller than the first pressing force. In addition, the operation lever is moved to a first position for positioning the pressure roller at the first pressing position and to a second position for positioning the pressure roller at the second pressing position. When the exterior cover is closed while the operation lever is located at the second position, the abutting portion abuts on the operation lever.

Abstract: An image reading apparatus includes a sheet supporting portion configured to support a sheet, a sheet feeding portion configured to feed the sheet, a reading unit configured to read an image on the sheet, a body portion including a conveyance path configured to guide the sheet fed by the sheet feeding portion to the reading unit, a first detection unit including a first moving portion configured to be in contact with the sheet and move, and a first detection portion configured to detect the first moving portion, a second detection unit including a second moving portion configured to be in contact with the sheet and move, and a second detection portion configured to detect the second moving portion, and a support member supported detachably on the body portion, and configured to support the first and second detection portions.

Abstract: Provided is a sheet-conveying apparatus including: a skew-feeding correction member having an abutting portion which is brought into contact with a conveyed sheet; and a positioning portion positioning the skew-feeding correction member and having a biasing member for biasing the skew-feeding correction member to a direction opposite to a direction to which the skew-feeding correction member rotates by the sheet. The sheet-conveying apparatus is set so that a formula M+M<MA is established when the sheet is pulled out, wherein a moment generated in the skew-feeding correction member due to a resultant force of tensions to upstream and downstream sides is assumed to be MA, a moment generated in the skew-feeding correction member due to a frictional force between the skew-feeding correction member and the sheet is assumed to be M, and a moment generated in the skew-feeding correction member due to the biasing member is assumed to be MS.

Abstract: An image reading apparatus and an image forming apparatus having an original base plate, a conveying unit which separates and conveys a bundle of original sheets sheet by sheet, a first image reading unit which reads image information from the one side of the original sheet, a second image reading unit which reads image information from the other side of the original sheet, and a detecting unit which detects image existence/non-existence information of each original sheet in a state that the bundle of original sheets is mounted on the original base plate, wherein the detecting unit includes an oscillating unit which oscillates an electromagnetic wave of 30 GHz to 100 THz and a receiving unit which receives a reflected wave of the electromagnetic wave reflected on each side of the sheet, thereby detecting the image existence/non-existence information of each original sheet based on the received electromagnetic wave information.

Abstract: Provided is a sheet-conveying apparatus including: a skew-feeding correction member having an abutting portion which is brought into contact with a conveyed sheet; and a positioning portion positioning the skew-feeding correction member and having a biasing member for biasing the skew-feeding correction member to a direction opposite to a direction to which the skew-feeding correction member rotates by the sheet. The sheet-conveying apparatus is set so that a formula M+MS<MA is established when the sheet is pulled out, wherein a moment generated in the skew-feeding correction member due to a resultant force of tensions to upstream and downstream sides is assumed to be MA, a moment generated in the skew-feeding correction member due to a frictional force between the skew-feeding correction member and the sheet is assumed to be M, and a moment generated in the skew-feeding correction member due to the biasing member is assumed to be MS.

Abstract: Provided is a sheet-conveying apparatus including: a skew-feeding correction member having an abutting portion which is brought into contact with a conveyed sheet; and a positioning portion positioning the skew-feeding correction member and having a biasing member for biasing the skew-feeding correction member to a direction opposite to a direction to which the skew-feeding correction member rotates by the sheet. The sheet-conveying apparatus is set so that a formula M+MS<MA is established when the sheet is pulled out, wherein a moment generated in the skew-feeding correction member due to a resultant force of tensions to upstream and downstream sides is assumed to be MA, a moment generated in the skew-feeding correction member due to a frictional force between the skew-feeding correction member and the sheet is assumed to be M, and a moment generated in the skew-feeding correction member due to the biasing member is assumed to be MS.

Abstract: An image reading apparatus and an image forming apparatus having an original base plate, a conveying unit which separates and conveys a bundle of original sheets sheet by sheet, a first image reading unit which reads image information from the one side of the original sheet, a second image reading unit which reads image information from the other side of the original sheet, and a detecting unit which detects image existence/non-existence information of each original sheet in a state that the bundle of original sheets is mounted on the original base plate, wherein the detecting unit includes an oscillating unit which oscillates an electromagnetic wave of 30 GHz to 100 THz and a receiving unit which receives a reflected wave of the electromagnetic wave reflected on each side of the sheet, thereby detecting the image existence/non-existence information of each original sheet based on the received electromagnetic wave information.

Abstract: An image forming member has a first sheet conveying member arranged at upstream side of a sheet conveying path of a sheet material, a second sheet conveying member arranged at downstream side of said sheet conveying path, a guide member which is provided between the first and the second sheet conveying members and guides the sheet material and a movable portion which is provided in the guide member and executes front-and-far-side adjustment of the sheet material by moving a portion against which the tip of sheet material is abutted in parallel to a sheet width direction perpendicular to a conveying direction.

Abstract: Conveyance speed of recording materials by a fixing roller pair can be set to conveyance speed based on detected results of a recording material detector and a loop detecting sensor, and information on the recording material that has been stored in a memory in advance, and the conveyance speed of the fixing roller pair is set so that loop length of the recording material will be a lower limit length, after the loop detecting sensor detects a loop of the recording material, and before the rear end of the recording material passes through the transfer roller pair.

Abstract: A sheet feed device has a door for supporting one of the rollers of a feed roller pair for feeding a sheet, mounted on the apparatus main body so as to be opened or closed on the one end part side in the roller pair axis direction such that the one roller is pressured against the other roller of the feed roller pair provided in the apparatus main body at the time the door is closed. An outer door is supported rotatably on the apparatus main body on the one side end part side in the feed roller pair axis direction; an inner door for supporting one of the rollers of the feed roller pair, supported rotatably with respect to the outer door on the one side end part side in the one roller axis direction. The one roller of the feed roller pair is separated with respect to the other roller at the time of opening the outer door, and thereafter the inner door is rotated while maintaining the angle with respect to the outer door according to the rotation of the outer door.

Abstract: An image forming apparatus includes an electrode member to prevent the generation of an image defect in the image forming apparatus, in which the electrode member is provided in the downstream side of a transfer device, the transfer device and a fixing device are arranged while brought close to each other, and the sheet is sandwiched by the fixing device while sandwiched and conveyed by an image bearing device and the transfer device.

Abstract: The present invention relates to a image forming member comprising a first sheet conveying member arranged at upstream side of a sheet conveying path of a sheet material, a second sheet conveying member arranged at downstream side of said sheet conveying path, a guide member which is provided between said first and said second sheet conveying members and guides said sheet material and a movable portion which is provided in said guide member and executes front-and-far-side adjustment of said sheet material by moving a portion against which the tip of said sheet material is abutted in parallel to a sheet width direction perpendicular to a conveying direction.

Abstract: Conveyance speed of recording materials by a fixing roller pair can be set to conveyance speed based on detected results of a recording material detection means and a loop detecting sensor, and information on the recording material that has been stored in a memory in advance, wherein the conveyance speed of the fixing roller pair is set so that loop length of the recording material will be a lower limit length, after the loop detecting sensor detects a loop of the recording material, and before the rear end of the recording material passes through the transfer roller pair.

Abstract: An image forming apparatus includes an image bearing member which bears a toner image; transfer means which forms a transfer nip portion while being in contact with the image bearing member, the transfer means which sandwiches and conveys a recording material with the image bearing member in the transfer nip portion, which transfers the toner image to the recording material; fixing means in which the recording material is sandwiched in a fixing nip portion where a first fixing member and a second fixing member are in contact with each other, the fixing means fixes the toner image to the recording material; and an electrode member which is provided between the transfer means and the fixing means, wherein the recording material is sandwiched and conveyed by the fixing means while sandwiched and conveyed by the transfer means, a length d (mm) of a shortest straight line connecting a center of the transfer nip portion and a center of the fixing nip portion in a direction in which the recording material is conveye

Abstract: The present invention relates to a sheet feed device comprising a door for supporting one of the rollers of a feed roller pair for feeding a sheet, mounted on the apparatus main body so as to be opened or closed on the one end part side in the roller pair axis direction such that the one roller is pressured against the other roller of the feed roller pair provided in the apparatus main body at the time the door is closed, comprising: an outer door supported rotatably on the apparatus main body on the one side end part side in the feed roller pair axis direction; an inner door for supporting one of the rollers of the feed roller pair, supported rotatably with respect to the outer door on the one side end part side in the one roller axis direction.

Abstract: The present invention relates to a sheet feed device comprising a door for supporting one of the rollers of a feed roller pair for feeding a sheet, mounted on the apparatus main body so as to be opened or closed on the one end part side in the roller pair axis direction such that the one roller is pressured against the other roller of the feed roller pair provided in the apparatus main body at the time the door is closed, comprising: an outer door supported rotatably on the apparatus main body on the one side end part side in the feed roller pair axis direction; an inner door for supporting one of the rollers of the feed roller pair, supported rotatably with respect to the outer door on the one side end part side in the one roller axis direction.

Abstract: The present invention relates to a sheet feed device comprising a door for supporting one of the rollers of a feed roller pair for feeding a sheet, mounted on the apparatus main body so as to be opened or closed on the one end part side in the roller pair axis direction such that the one roller is pressured against the other roller of the feed roller pair provided in the apparatus main body at the time the door is closed, comprising: an outer door supported rotatably on the apparatus main body on the one side end part side in the feed roller pair axis direction; an inner door for supporting one of the rollers of the feed roller pair, supported rotatably with respect to the outer door on the one side end part side in the one roller axis direction.