Abstract: A sheet conveying apparatus is provided which includes a first rotary member; a second rotary member configured to convey a sheet with the first rotary member and which is separable from and in contact with the first rotary member; a sheet detecting member which is movable by being pressed by the sheet; and a detecting sensor configured to detect a presence or absence of the sheet based on a position of the member. The sheet detecting member is movable between a detecting position for detecting a presence or absence of the sheet by the detecting sensor in which the sheet detecting member can be pressed by the sheet and a retreat position in which the sheet detecting member is retreated from a sheet conveyed, and the sheet detecting member is moved to the detecting position from the retract position in association with a movement of the second rotary member away from the first rotary member.

Abstract: An air heating mechanism for heating the air which is blown from a loosening/separating nozzle toward the top sheet attracted to an attracting and conveying unit is provided. A control unit controls the air heating mechanism based on moisture content information from a sensor for detecting a moisture content of a sheet supported by the tray.

Abstract: An image heating apparatus includes a heating rotatable member for heating an image on a recording material at a nip; an endless belt cooperative with the heating rotatable member to form the nip; a pressing pad for pressing the belt at the nip; and a lubricant application member for applying a lubricant on an inner surface of the belt, wherein the lubricant application member is away from the belt when the belt is at a position retracted from a position where an image heating operation of the apparatus is capable.

Abstract: An image heating apparatus includes a rotatable heating member configured to heat an image on a recording medium at a nip, driving means configured to drive the heating member, an endless belt configured to form the nip with the heating member, and a driving roller configured to drive the endless belt. In the image heating apparatus, the following expressions are satisfied: ?2<?1 0.005<?2<0.3 V1<V2 where ?2 is a friction coefficient between the endless belt and the driving roller, ?1 is a friction coefficient between the heating member and the endless belt, V1 is a peripheral speed of the heating member, and V2 is a peripheral speed of the driving roller.

Abstract: An image forming apparatus comprises a fixing unit for fixing toner image onto a sheet on which the toner image is formed, and a redelivery path for delivering the fixed sheet ejected from the fixing unit to the image forming unit again. A curved path receives the fixed sheet ejected from the fixing unit, reverses the sheet, and delivers the sheet to the redelivery path again. The redelivery path includes a horizontal-registration detection sensor for detecting the edge of the sheet in the width direction and a color density sensor for detecting the color density and color of an image formed on the sheet. A curl-corrector is disposed downstream of the curved path to straighten the curled sheet and then send the sheet to the horizontal-registration detection sensor and the density sensor.

Abstract: There is provided an image forming apparatus capable of image forming on both surfaces of a sheet, having a first transfer portion which transfers an image formed at an image forming unit to a first surface of the sheet, and a second transfer portion which transfers an image formed at the image forming unit to a second surface of the sheet, wherein the sheet on the first surface of which the image is formed at the first transfer portion is conveyed to the second transfer portion while keeping a front of the image to a front in a conveying direction, and the sheet is conveyed while keeping an end portion in a width direction of the sheet conveyed through the first transfer portion and the end portion in the width direction of the sheet conveyed through the second transfer portion on same end portion side relative to the sheet conveying direction.

Abstract: A sheet feeding apparatus according to an aspect of the invention includes conveying suction belts which have a function of rotating an adsorbed sheet and a function of conveying the sheet; a suction fan 112 which adsorbs the sheet to the belts; CCDs which detect a position and an skew in a direction orthogonal to a sheet conveying direction while the sheet is adsorbed to the belts; and a control device for driving the belts to rotate the sheet according to signals of CCDs in order to correct an attitude of the sheet adsorbed to the belts.

Abstract: The present invention relates to a sheet processor apparatus comprising: a sheet stack portion on which a sheet is stacked; a sheet conveyance path for conveying a sheet stacked on the sheet stack portion; a sheet conveyor for conveying to the sheet conveyance path the sheet stacked on the sheet stack portion; and a sheet folding device for folding a sheet in the sheet-set conveyance path. The sheet folding device is provided in the sheet conveyance path, and at least a portion of the sheet conveyance path at which the sheet folding device is positioned is formed into a curved shape.

Abstract: A sheet treating apparatus for treating a sheet having an image formed thereon is provided, which includes a pair of transport rollers for transporting the sheet upward, a sheet post-treating portion having an intermediate treatment tray, provided to execute post-treatment such as sheet stitching or punching while holding the sheet in a substantially vertical state, and a sheet delivery portion arranged above the sheet post-treating portion. Also, an image forming apparatus is provided, which includes an image reading portion for reading an image, an image forming portion arranged below the image reading portion to form an image on a sheet, a delivery space portion provided in an apparatus housing between the image reading portion and the image forming portion to deliver the sheet, sheet treating portion for treating the sheet while holding it in a substantially vertical state, and an in-body transportation path for transporting the sheet treated by the sheet treating means to the delivery space portion.

Abstract: A registration unit includes a skew correction roller pair configured to rotate a sheet conveyed from a conveyance roller pair and to correct skew of the sheet. The registration unit sheet further includes a projectable swinging guide arranged between the conveyance roller pair and the skew correction roller pair to deflect the sheet. The skew correction roller pair corrects the skew of the sheet deflected by the swinging guide.

Abstract: An air heating mechanism for heating the air which is blown from a loosening/separating nozzle toward the top sheet attracted to an attracting and conveying unit is provided. A control unit controls the air heating mechanism based on moisture content information from a sensor for detecting a moisture content of a sheet supported by the tray.

Abstract: A sheet conveying apparatus is provided which includes a first rotary member; a second rotary member configured to convey a sheet with the first rotary member and which is separable from and in contact with the first rotary member; a sheet detecting member which is movable by being pressed by the sheet; and a detecting sensor configured to detect a presence or absence of the sheet based on a position of the member. The sheet detecting member is movable between a detecting position for detecting a presence or absence of the sheet by the detecting sensor in which the sheet detecting member can be pressed by the sheet and a retreat position in which the sheet detecting member is retreated from a sheet conveyed, and the sheet detecting member is moved to the detecting position from the retract position in association with a movement of the second rotary member away from the first rotary member.

Abstract: An image forming apparatus, such as a printer, having a frame member, wherein there is provided, inside the frame member and on the upstream side of a sheet discharging portion with respect to the sheet conveying direction, a buffering device equipped with a rotary member capable of forward and reverse rotation, and wherein there are formed, along the peripheral surface of the rotary member, a buffering path for causing sheets to stay temporarily, a part of a sheet processing path for conveying sheets to a sheet processing apparatus, and a part of a re-conveying path for re-conveying sheets to an image forming portion.

Abstract: An image heating apparatus includes a rotatable heating member configured to heat an image on a recording medium at a nip, driving means configured to drive the heating member, an endless belt configured to form the nip with the heating member, and a driving roller configured to drive the endless belt. In the image heating apparatus, the following expressions are satisfied: ?2<?1 0.005<?2<0.3 V1<V2 where ?2 is a friction coefficient between the endless belt and the driving roller, ?1 is a friction coefficient between the heating member and the endless belt, V1 is a peripheral speed of the heating member, and V2 is a peripheral speed of the driving roller.

Abstract: A sheet processing apparatus comprising a stack means for stacking sheets to be fed; a feeding path comprising guide members for feeding the sheets to the stack means, disposed facing with each other; a discharging means for discharging the sheets to the stack means; and a sheet processing means capable of moving in the sheet width direction for processing the sheets stacked on the stack means at a predetermined position. One of the guide members disposed facing with each other is divided into a plurality of parts in the sheet width direction such that the feeding path can be selectively opened per each part in a space for moving the sheet processing means in a space where the sheet processing means moves.

Abstract: An image heating apparatus includes a heating rotatable member for heating an image on a recording material at a nip; an endless belt cooperative with the heating rotatable member to form the nip; a pressing pad for pressing the belt at the nip; and a lubricant application member for applying a lubricant on an inner surface of the belt, wherein the lubricant application member is away from the belt when the belt is at a position retracted from a position where an image heating operation of the apparatus is capable.

Abstract: The present invention relates to a sheet processor apparatus comprising: a sheet stack portion on which a sheet is stacked; a sheet conveyance path for conveying a sheet stacked on the sheet stack portion; a sheet conveyor for conveying to the sheet conveyance path the sheet stacked on the sheet stack portion; and a sheet folding device for folding a sheet in the sheet-set conveyance path. The sheet folding device is provided in the sheet conveyance path, and at least a portion of the sheet conveyance path at which the sheet folding device is positioned is formed into a curved shape.

Abstract: The present invention relates to a sheet processor apparatus comprising: a sheet stack portion on which a sheet is stacked; a sheet conveyance path for conveying a sheet stacked on the sheet stack portion; a sheet conveyor for conveying to the sheet conveyance path the sheet stacked on the sheet stack portion; and a sheet folding device for folding a sheet in the sheet-set conveyance path. The sheet folding device is provided in the sheet conveyance path, and at least a portion of the sheet conveyance path at which the sheet folding device is positioned is formed into a curved shape.

Abstract: A sheet processing apparatus comprising a stack means for stacking sheets to be fed; a feeding path comprising guide members for feeding the sheets to the stack means, disposed facing with each other; a discharging means for discharging the sheets to the stack means; and a sheet processing means capable of moving in the sheet width direction for processing the sheets stacked on the stack means at a predetermined position. One of the guide members disposed facing with each other is divided into a plurality of parts in the sheet width direction such that the feeding path can be selectively opened per each part in a space for moving the sheet processing means in a space where the sheet processing means moves.

Abstract: A feeding path with opposing guide members. One of the guide members is divided into a plurality of parts in a sheet width direction. The parts selectively open and close portions of the feeding path. The parts move in a space where a sheet processing device moves.