摘要:
An image forming apparatus includes: a sheet conveyance section that conveys a sheet; an image forming section that forms an image on the sheet conveyed by the sheet conveyance section according to an image signal; a sheet heating section that heats the sheet on which the image is formed by the image forming section; and a curl straightening section that straightens curl of the sheet after the sheet is heated by the sheet heating section. The sheet heating section curls the sheet in a different direction according to a sheet thickness. The curl straightening section includes: a first curl straightening section that straightens the curl of the sheet curled in a first direction for curling thick sheet; and a second curl straightening section disposed on a downstream side in a sheet conveyance direction to straighten the curl of the sheet curled in a second direction opposite to the first direction.
摘要:
A curl correction device that corrects curl, including: a curl correction shaft that drives to carry a sheet; a first supporting member that supports the curl correction shaft; a curl correction roll that holds the sheet between the curl correction shaft and the curl correction roll and presses the sheet against the curl correction shaft; a second supporting member that supports the curl correction roll and rotates the curl correction roll around a first end in the longitudinal direction of the curl correction roll between closed state and open state; and a cam mechanism that provides, via a cam, the curl correction shaft with driving force for pressing the curl correction roll according to a position of the cam, the cam mechanism being provided with a cam shaft, a connecting member, a first cam receiving member, and a second cam receiving member.
摘要:
A curl correction device that corrects curl, including: a curl correction shaft that drives to carry a sheet; a first supporting member that supports the curl correction shaft; a curl correction roll that holds the sheet between the curl correction shaft and the curl correction roll and presses the sheet against the curl correction shaft; a second supporting member that supports the curl correction roll and rotates the curl correction roll around a first end in the longitudinal direction of the curl correction roll between closed state and open state; and a cam mechanism that provides, via a cam, the curl correction shaft with driving force for pressing the curl correction roll according to a position of the cam, the cam mechanism being provided with a cam shaft, a connecting member, a first cam receiving member, and a second cam receiving member.
摘要:
A fixing device includes: a first rotating member; a second rotating member that extends along the first rotating member, sandwiches a recording medium with a toner image formed thereon between the first and second rotating members, rotates together with the first rotating member, and heats the recording medium to fix the toner image on the recording medium; a heating device whose circumferential surface circularly moves while contacting an external circumferential surface of the second rotating member, and the heating device heats the second rotating member; a temperature detecting device disposed to face the external circumferential surface of the second rotating member without contacting the external circumferential surface to detect a temperature thereof; and a cleaning device cleaning the circumferential surface of the heating device and disposed between the heating device and the temperature detecting device along the surface of the second rotating member.
摘要:
A driving mechanism includes: a first contacting member that comes into contact with a contacted member; a supporting member that supports the first contacting member and is reciprocatably provided, the supporting member moving the first contacting member into contact with or retracts from the contacted member; a cam that reciprocates the supporting member; and a driving force transmission member that is provided to transmit a driving force to the cam, the driving force transmission member is engaged with the cam by transmit a first driving force, and is disengaged from the cam by a second driving force. In the driving mechanism, the second driving force is applied to the driving force transmission member after the cam is stopped in a state where the cam comes into contact with the supporting member on a small radius end of the cam.
摘要:
An image forming apparatus includes a recording material transporting path that extends in a direction from bottom to top of a body of the image forming apparatus and transports a recording material, a fixing device provided on the recording material transporting path, which includes a rotatable heating member that has an internal heat source and a rotatable pressure member that forms a nip area with the heating member by being located in contact with and pressed against the heating member, to nip the recording material for carrying out a fixing process, and an ejection guide member that guides a recording material ejected from the nip area to the outside of the image forming apparatus. The ejection guide member has a guide surface formed to intersect a tangent line of the heating member at the most downstream point of the nip area, and the guide surface intersects the tangent line at an obtuse angle.
摘要:
An image forming apparatus includes a recording material transporting path that extends in a direction from below upward and that transports a recording material, a fixing device provided on the way of the recording material transporting path, the fixing device having a rotatable heating member that has a heating source provided inside thereof and a rotatable pressure member that forms a fixing nip in pressure contact with the heating member, and a detaching member that contacts the heating member in the vicinity at a downstream side of the of the fixing nip in the rotation direction of the heating member and detaches the recording material from the heating member. The detachment member has a detachment guide surface extending from a contact point with the heating member, and a tilt of the detachment guide surface toward the pressure member side in relation with a vertical line including the contact point is not more than 2.5°.
摘要:
An image forming apparatus includes a recording material transporting path that extends in a direction from bottom to top of a body of the image forming apparatus and transports a recording material, a fixing device provided on the recording material transporting path, which includes a rotatable heating member that has an internal heat source and a rotatable pressure member that forms a nip area with the heating member by being located in contact with and pressed against the heating member, to nip the recording material for carrying out a fixing process, and an ejection guide member that guides a recording material ejected from the nip area to the outside of the image forming apparatus. The ejection guide member has a guide surface formed to intersect a tangent line of the heating member at the most downstream point of the nip area, and the guide surface intersects the tangent line at an obtuse angle.
摘要:
An image forming apparatus includes a recording material transporting path that extends in a direction from below upward and that transports a recording material, a fixing device provided on the way of the recording material transporting path, the fixing device having a rotatable heating member that has a heating source provided inside thereof and a rotatable pressure member that forms a fixing nip in pressure contact with the heating member, and a detaching member that contacts the heating member in the vicinity at a downstream side of the of the fixing nip in the rotation direction of the heating member and detaches the recording material from the heating member. The detachment member has a detachment guide surface extending from a contact point with the heating member, and a tilt of the detachment guide surface toward the pressure member side in relation with a vertical line including the contact point is not more than 2.5°.
摘要:
The fixing device includes: a fixing member that includes a conductive layer capable of heating by electromagnetic induction; a magnetic field generating member that generates an alternate-current magnetic field intersecting with the conductive layer of the fixing member; plural magnetic path forming members that form a magnetic path of the alternate-current magnetic field generated by the magnetic field generating member; a support member that supports the magnetic field generating member; an elastic support member that is arranged between the magnetic field generating member and the plural magnetic path forming members so as to be in contact with the plural magnetic path forming members; and a pressing member that presses the plural magnetic path forming members toward the magnetic field generating member.