Abstract: A developing device includes a developer carrying member for carrying a developer; a first feeding portion for supplying the developer to the developer carrying member while feeding the developer along the developer carrying member; a second feeding portion, communicating with the first feeding portion at end portions thereof, for feeding the developer in a direction opposite to a developer feeding direction of the first feeding portion while collecting the developer from the developer carrying member; and a partition wall portion for partitioning the first and second feeding portions. The partition wall portion includes an opposing portion opposing the developer carrying member with a spacing. A surface roughness of at least the opposing portion is larger than that of the developer carrying member.

Abstract: A developing device includes a plurality of developer carrying members each for carrying at its surface a developer for developing an electrostatic latent image on an image bearing member. Of the plurality of developer carrying members, the developer carrying member requiring a largest driving torque resulting from the developer has a surface which has a plurality of grooves extending in parallel in a direction having a component of an axial direction of the developer carrying member at a predetermined interval, and wherein another developer carrying member has a blasted surface.

Abstract: The specification discloses a developing device comprises a first developer bearing member configured to bear a developer including a toner and a carrier, and to convey the developer to a first developing region facing an image bearing member, so as to develop an electrostatic latent image formed onto the image bearing member and a second developer bearing member configured to bear a developer transferred from the first developer bearing member, and to develop an electrostatic latent image formed on the image bearing member, by conveying a developer to a second developing region facing the image bearing member and a cover unit configured to shield a route toward the image bearing member from a mutual gap position between the first developer bearing member and the second developer bearing member.

Abstract: A developing device comprising a developer carrying member for carrying the developer containing non-magnetic toner and magnetic carrier to a position where said developer carrying member is opposed to an image bearing member; a developing container including a first chamber for accommodating a developer to be supplied to said developer carrying member, a second chamber provided below said first chamber, and a pair of transferring portions for circulating the developer between said first chamber and said second chamber; a first feeding member and a second feeding member, rotatably provided, in said first chamber and said second chamber, respectively, for stirring and feeding the developer; and a magnetic member provided at least on said first feeding member, wherein said magnetic member is provided in a region opposing at least one of said transferring portions where the developer is scooped from said second chamber into said first chamber.

Abstract: A control apparatus controls at least one of the first image forming apparatus and the second image forming apparatus connected downstream of the first image forming apparatus so that when switching from a first mode to a second mode, if the second image forming apparatus is unable to perform image forming on a second side of a sheet whose first side has undergone image forming in the second image forming apparatus before the second image forming apparatus performs image forming on a second side of a sheet whose first side has undergone image forming in the first image forming apparatus, an order of the sheet whose first and second sides undergo image forming in the second image forming apparatus and the sheet whose first side undergoes image forming in the first image forming apparatus and whose second side undergoes image forming in the second image forming apparatus is not swapped.

Abstract: An image forming apparatus includes a developing device for developing a latent image formed on an image bearing member into a developer image; a transferring device for transferring the developer image from the image bearing member onto a transfer material; a temperature detecting device, disposed in a main assembly of the image forming apparatus, for detecting a temperature; and a controller for controlling a forced consumption operation in which toner is forcedly consumed by the developing device without transferring the developer image from the image bearing member onto the transfer material.

Abstract: There is provided a development apparatus including a plurality of replenishment developer containers which accommodates a replenishment developer containing a toner to be replenished to a plurality of development devices, a plurality of replenishment developer conveyance paths which replenishes the replenishment developer in the plurality of replenishment developer containers to the plurality of development devices, a plurality of conveyance members provided in the plurality of replenishment developer conveyance paths, wherein a length of at least one conveyance path, of the plurality of replenishment developer conveyance paths, is different from that of other conveyance paths, and cohesion degree of a replenishment developer conveyed by the longest conveyance path, of the plurality of replenishment conveyance paths, is lower than cohesion degree of there plenishment developer conveyed by other conveyance paths.

Abstract: There is provided a development apparatus including a plurality of replenishment developer containers which accommodates a replenishment developer containing a toner to be replenished to a plurality of development devices, a plurality of replenishment developer conveyance paths which replenishes the replenishment developer in the plurality of replenishment developer containers to the plurality of development devices, a plurality of conveyance members provided in the plurality of replenishment developer conveyance paths, wherein a length of at least one conveyance path, of the plurality of replenishment developer conveyance paths, is different from that of other conveyance paths, and cohesion degree of a replenishment developer conveyed by the longest conveyance path, of the plurality of replenishment conveyance paths, is lower than cohesion degree of the replenishment developer conveyed by other conveyance paths.

Abstract: There is provided a development apparatus including a plurality of replenishment developer containers which accommodates a replenishment developer containing a toner to be replenished to a plurality of development devices, a plurality of replenishment developer conveyance paths which replenishes the replenishment developer in the plurality of replenishment developer containers to the plurality of development devices, a plurality of conveyance members provided in the plurality of replenishment developer conveyance paths, wherein a length of at least one conveyance path, of the plurality of replenishment developer conveyance paths, is different from that of other conveyance paths, and cohesion degree of a replenishment developer conveyed by the longest conveyance path, of the plurality of replenishment conveyance paths, is lower than cohesion degree of the replenishment developer conveyed by other conveyance paths.