Abstract: A fixing device includes a fixing belt, a pressuring member, a driving member and a slide contact member. The fixing belt is arranged rotatably. The pressuring member comes into pressure contact with the fixing belt to form a fixing nip and is arranged rotatably. The driving member is arranged so as to sandwich the fixing belt with the pressuring member and rotates the fixing belt. The slide contact member is arranged so as to sandwich the fixing belt with the pressuring member and comes into slide contact with the fixing belt. The fixing belt is engaged around the driving member and slide contact member with a state having looseness at least partially.

Abstract: A fixing device according to one aspect of the present disclosure includes a fixing belt, a pressure member, a heating member, a pressing member, and a heat source. The fixing belt is rotational. The pressure member is rotational and is brought into press-contact with the fixing belt to form a fixing nip. The heating member is rotational and is disposed to interpose the fixing belt between the heating member and the pressure member. The pressing member is disposed to interpose the fixing belt between the pressing member and the pressure member and presses the fixing belt toward the pressure member side. The heat source is disposed radially inside the fixing belt and radially outside the heating member. Radiant heat radiated from the heat source directly reaches the fixing belt, the heating member, and the pressing member.

Abstract: A fixing device includes a fixing member, a pressure member, and a separation roller. The fixing member is configured to rotate in a first direction. The pressure member is configured to rotate in a second direction so as to allow fixing target to pass between the fixing member and the pressure member. The separation roller is configured to rotate only in the same direction as the first direction to separate the fixing target from the fixing member or to rotate only in the same direction as the second direction to separate the fixing target from the pressure member.

Abstract: A fixing device includes a fixing belt, a pressuring member, a pressing member and a sheet member. The fixing belt is arranged rotatably and configured to extend along an axis direction. The pressuring member is arranged rotatably and configured to come into pressure contact with the fixing belt so as to form a fixing nip. The pressing member is configured to press the fixing belt to a side of the pressuring member and configured such that the fixing belt is interposed between the pressing member and the pressuring member. The sheet member is formed in a tubular shape and provided around the pressing member and configured to rotate with rotation of the fixing belt.

Abstract: A fixing device includes a fixing belt, a pressuring member, a heating member, a pressing member and a supporting member. The heating member is arranged rotatably around a rotation axis and configured such that the fixing belt is sandwiched between the heating member and the pressuring member. The pressing member is configured to press the fixing belt to a side of the pressuring member and configured such that the fixing belt is sandwiched between the pressing member and the pressuring member. The supporting member has a supporting face configured to come into contact with the inner circumference face of the fixing belt. The supporting face is inclined toward inside in a radial direction of the fixing belt from both end sides to a center side of the fixing belt in the rotation axis direction.

Abstract: A fixing device according to one aspect of the present disclosure includes a fixing belt, a pressure member, a heating member, a pressing member, and a heat source. The fixing belt is rotational. The pressure member is rotational and is brought into press-contact with the fixing belt to form a fixing nip. The heating member is rotational and is disposed to interpose the fixing belt between the heating member and the pressure member. The pressing member is disposed to interpose the fixing belt between the pressing member and the pressure member and presses the fixing belt toward the pressure member side. The heat source is disposed radially inside the fixing belt and radially outside the heating member. Radiant heat radiated from the heat source directly reaches the fixing belt, the heating member, and the pressing member.

Abstract: A fixing device includes a fixing belt, a pressuring member, a driving member and a slide contact member. The fixing belt is arranged rotatably. The pressuring member comes into pressure contact with the fixing belt to form a fixing nip and is arranged rotatably. The driving member is arranged so as to sandwich the fixing belt with the pressuring member and rotates the fixing belt. The slide contact member is arranged so as to sandwich the fixing belt with the pressuring member and comes into slide contact with the fixing belt. The fixing belt is engaged around the driving member and slide contact member with a state having looseness at least partially.

Abstract: A fixing device includes a fixing member, a pressure member, and a separation roller. The fixing member is configured to rotate in a first direction. The pressure member is configured to rotate in a second direction so as to allow fixing target to pass between the fixing member and the pressure member. The separation roller is configured to rotate only in the same direction as the first direction to separate the fixing target from the fixing member or to rotate only in the same direction as the second direction to separate the fixing target from the pressure member.

Abstract: An image forming apparatus includes an image transfer portion for transferring a toner image to a printing sheet. A fixing portion includes a fixing member and a pressure member pressed against the fixing member for fixing the toner image to the printing sheet. A guide is between the image transfer portion and the fixing portion for guiding the printing sheet carrying the toner image toward a nip between the fixing member and the pressure member. The guide includes a rigid first guide plate and a flexible second guide plate joined to the first guide plate at a downstream portion thereof along a sheet feeding direction. The second guide plate has a free downstream end that is closer to the fixing member than a tangent line drawn to pass through the nip between the fixing member and the pressure member.

Abstract: A fixing device includes a fixing roller for fixing a toner image transferred onto a sheet and conveying the sheet along a conveyance path, and a separating mechanism for separating the sheet from the fixing roller. The separating mechanism includes a claw member having a tip portion in contact with the outer circumferential surface of the fixing roller to separate the sheet from the fixing roller, a holder member for holding the claw member, and a rotary member rotatably held in the holder member downstream of the tip portion relative to the conveyance path and adapted to guide the sheet separated from the fixing roller to a downstream side along the conveyance path while being rotated. The holder member has a guiding portion for guiding the sheet to the rotary member on the conveyance path between the tip portion of the claw member and the rotary member.

Abstract: A fixing device is provided with a fixing roller for fixing a toner image transferred on a sheet to the sheet, and a separating mechanism for separating the sheet from the fixing roller. The separating mechanism includes a claw member having a tip portion held in contact with the outer circumferential surface of the fixing roller for separating the sheet from the fixing roller, a supporting member pivotably supporting the claw member, and a biasing member for biasing the claw member toward the outer circumferential surface of the fixing roller so that the tip portion of the claw member presses the fixing roller.

Abstract: A fixing device is provided with a fixing roller for fixing a toner image transferred on a sheet to the sheet, and a separating mechanism for separating the sheet from the fixing roller. The separating mechanism includes a claw member having a tip portion held in contact with the outer circumferential surface of the fixing roller for separating the sheet from the fixing roller, a supporting member pivotably supporting the claw member, and a biasing member for biasing the claw member toward the outer circumferential surface of the fixing roller so that the tip portion of the claw member presses the fixing roller.

Abstract: A sheet nipping mechanism is applied to an image forming apparatus and has a transfer belt for transporting a sheet having a toner image through a photosensitive drum. A fixing roller and a pressure roller are downstream of the transfer belt and are vertically aligned in a paired manner to define a nip zone therebetween for nipping the sheet. A guide is disposed between the nip zone and the downstream end of the transfer belt. The fixing roller has a reverse-crown shape whose diameter is gradually reduced in a direction extending from each of the opposite transverse ends to the central region of the fixing roller. The guide has an edge opposed to the nip zone and is formed in a crown shape conformable to the reverse-crown shape. The sheet nipping mechanism prevents crimples and bouncing of sheet in the nip zone.

Abstract: A fixing device includes a fixing roller for fixing a toner image transferred onto a sheet and conveying the sheet along a conveyance path, and a separating mechanism for separating the sheet from the fixing roller. The separating mechanism includes a claw member having a tip portion in contact with the outer circumferential surface of the fixing roller to separate the sheet from the fixing roller, a holder member for holding the claw member, and a rotary member rotatably held in the holder member downstream of the tip portion relative to the conveyance path and adapted to guide the sheet separated from the fixing roller to a downstream side along the conveyance path while being rotated. The holder member has a guiding portion for guiding the sheet to the rotary member on the conveyance path between the tip portion of the claw member and the rotary member.

Abstract: An image forming apparatus for forming a color image with a plurality of color toners includes: a photosensitive body, a rotary developing device for developing a latent image on the photosensitive body by selectively allowing developing units corresponding to their respective color toners to rotationally move to a developing position opposite the photosensitive body; and a cleaning blade for removing the residual toner on the photosensitive body. At least one color toner in the plurality of color toners is an irregular toner, and other color toners are spherical toners. The volume mean particle size of the irregular toner is not more than the volume mean particle size of the spherical toner. With this construction, high cleaning capability can be attained without impairing the merit of the spherical toner that enables a densely high-fine image to be obtained.

Abstract: A sheet nipping mechanism is applied to an image forming apparatus and has a transfer belt for transporting a sheet having a toner image through a photosensitive drum. A fixing roller and a pressure roller are downstream of the transfer belt and are vertically aligned in a paired manner to define a nip zone therebetween for nipping the sheet. A guide is disposed between the nip zone and the downstream end of the transfer belt. The fixing roller has a reverse-crown shape whose diameter is gradually reduced in a direction extending from each of the opposite transverse ends to the central region of the fixing roller. The guide has an edge opposed to the nip zone and is formed in a crown shape conformable to the reverse-crown shape. The sheet nipping mechanism prevents crimples and bouncing of sheet in the nip zone.