摘要:
An image forming apparatus includes an image bearing member; a toner image forming portion for forming a toner image on the image bearing member; a rotatable belt member, stretched by a plurality of stretching members, for carrying and conveying a recording material; a transfer member for transferring the toner image from the image bearing member onto the recording material; a bias applying portion for applying a bias for transferring the toner image from the image bearing member onto the recording material; a push-up member for pushing up the belt member from an inner surface side of the belt member, perpendicular to a recording material conveyance direction; and an execution portion executing an operation in which the recording material is separated from the belt member by a push-up operation, which is performed, during rotation of the belt member, before the bias is applied to the transfer member.
摘要:
An image forming apparatus includes an image bearing member for bearing a toner image; a toner image forming portion for forming a toner image on the image bearing member; a rotatable belt member, stretched by a plurality of stretching members, for carrying and conveying a recording material; a transfer member for transferring the toner image from the image bearing member onto the recording material carried on the belt member by pressing the belt member against the image bearing member; a bias applying portion for applying to the transfer member a transfer bias for transferring the toner image from the image bearing member onto the recording material; a push-up member for locally pushing up the belt member from an inner surface side of the belt member, in a direction perpendicular to a recording material conveyance direction, at a downstream-side position of the transfer member with respect to the recording material conveyance direction; and an execution portion for executing an operation in a mode in which the recording material is separated from the belt member by a push-up operation for the belt member by the push-up member. In the mode, the push-up operation of the push-up member is performed, during rotation of the belt member, before the transfer bias is applied to the transfer member.
摘要:
An image forming apparatus is disclosed including at least a plurality of image bearing members, a plurality of image forming units each including plural image forming members for operating image forming steps onto each of the image bearing members, and a further image bearing member, which are held collectively on an image bearing member holding component, image forming unit holding component and second image bearing member holding component, respectively. By further providing a contact/detach mechanism adapted to detaching movements, within said image forming apparatus, of the image bearing member holding component and the second image bearing member holding component in relation to the image forming unit holding component, the mechanism is greatly simplified with relatively simple and less expensive construction of the mechanism disclosed herein, through eliminating plural contact/detach mechanisms separately provided for the noted holding components and also providing one integrating power sources for use in driving plural units in common. As a result, the previously known disadvantage in image forming apparatus such as contact residue images which are unduly caused by continual contact of the photoreceptors to image forming units and intermediate transfer belt can be obviated, as an example.
摘要:
An image forming apparatus is disclosed including at least a plurality of image bearing members a plurality of image forming units each including plural image forming members for operating image forming steps onto each of the image bearing members, and a further image bearing member, which are held collectively on an image bearing member holding component. image forming unit holding component and second image bearing member holding component, respectively. By further providing a contact/detach mechanism adapted to detaching movements, within said image forming apparatus, of the image bearing member holding component and the second image bearing member holding component in relation to the image forming unit holding component, the mechanism is greatly simplified with relatively simple and less expensive construction of the mechanism disclosed herein, through eliminating plural contact/detach mechanisms separately provided for the noted holding components and also providing one integrating power sources for use in driving plural units in common. As a result, the previously known disadvantage in image forming apparatus such as contact residue images which are unduly caused by continual contact of the photoreceptors to image forming units and intermediate transfer belt can be obviated, as an example.
摘要:
An image forming apparatus is disclosed including at least a plurality of image bearing members, a plurality of image forming units each including plural image forming members for operating image forming steps onto each of the image bearing members, and a further image bearing member, which are held collectively on an image bearing member holding component, image forming unit holding component and second image bearing member holding component, respectively. By further providing a contact/detach mechanism adapted to detaching movements, within said image forming apparatus, of the image bearing member holding component and the second image bearing member holding component in relation to the image forming unit holding component, the mechanism is greatly simplified with relatively simple and less expensive construction of the mechanism disclosed herein, through eliminating plural contact/detach mechanisms separately provided for the noted holding components and also providing one integrating power sources for use in driving plural units in common. As a result, the previously known disadvantage in image forming apparatus such as contact residue images which are unduly caused by continual contact of the photoreceptors to image forming units and intermediate transfer belt can be obviated, as an example.
摘要:
An image forming apparatus is disclosed including at least a plurality of image bearing members a plurality of image forming units each including plural image forming members for operating image forming steps onto each of the image bearing members, and a further image bearing member, which are held collectively on an image bearing member holding component. image forming unit holding component and second image bearing member holding component, respectively. By further providing a contact/detach mechanism adapted to detaching movements, within said image forming apparatus, of the image bearing member holding component and the second image bearing member holding component in relation to the image forming unit holding component, the mechanism is greatly simplified with relatively simple and less expensive construction of the mechanism disclosed herein, through eliminating plural contact/detach mechanisms separately provided for the noted holding components and also providing one integrating power sources for use in driving plural units in common. As a result, the previously known disadvantage in image forming apparatus such as contact residue images which are unduly caused by continual contact of the photoreceptors to image forming units and intermediate transfer belt can be obviated, as an example.
摘要:
An image recording apparatus comprises an image carrier (1); a latent image forming means (2); a plurality of developing means (3: 3a, 3b, 3c and 3d); a transfer drum (5) having a sheet holding surface (A); a transfer means (6); a sheet feed means (11); a sheet type discriminating means (12) for discriminating whether or not the surface rigidity of the recording sheet (4) stacked on the sheet feed means (11) is higher than the reference surface rigidity; a curl deforming means (14) arranged in a conveyance passage of the recording sheet (4) from the sheet feed means (11) to the transfer drum (5), for forcibly curling the recording sheet (4) in accordance with a radius of curvature of the transfer drum (5) when it is discriminated by the sheet type discriminating means (12) that the recording sheet (4) is highly rigid; a sheet holding control means (19) for holding the recording sheet (4) on the same sheet holding surface (A) of the transfer drum (5) irrespective of the result of discrimination conducted by the sheet type discriminating means (12); and an image forming process control means (16) for controlling the transfer of the toner image of each color from the image carrier (1) onto the recording sheet (4) held on the transfer drum (5).