An image forming apparatus includes an image forming portion including a photosensitive member and a developing portion, a sheet accommodating portion, a sheet feeding portion, and a first frame. The first frame includes an upper space supporting the image forming portion, and a lower space under the upper space. A second frame is mountable to a lower portion of said first frame. The accommodating portion and the feeding portion are replaceable with a supply container containing toner to be supplied to a developing portion of the image forming portion, in which the second frame supports the accommodating portion and the feeding portion.

The present application discloses an image formation apparatus that can transfer an image into electronic paper using an electronic photography method, and a printing control method for the image formation apparatus. The present electronic paper comprises an electrophoresis layer for displaying an image using an electrophoresis method, a conductive layer, and a film layer for transmitting an image; and the image formation apparatus comprises a communication interface for receiving printing data, an image formation unit for transferring an image corresponding to the printing data, and a processor for controlling the image formation unit.

Provided is an electrophotographic photosensitive member including: a support; and a photosensitive layer, wherein the support has a surface formed of Al and/or an Al alloy, wherein the surface of the support comprises Al crystal grains having: (?) a plane at ?15? or more and less than +15? with respect to a {001} orientation; (?) a plane at ?15? or more and less than +15? with respect to a {101} orientation; and (?) a plane at ?15? or more and less than +15? with respect to a {111} orientation, and wherein the ratio of an area occupied by the Al crystal grain having the (?) is 10% or less, and the value of the ratio of an area occupied by the Al crystal grain having the (?) to an area occupied by the Al crystal grain having the (?) is more than 4/6 and less than 6/4.

An image forming apparatus according to an embodiment includes a communication interface for receiving image forming instruction information via a plurality of communication protocols. The image forming instruction information includes image data, and transmission information indicating the communication protocol used. An image forming section prints an image using one of a decolorable toner and a non-decolorable toner. A storage device stores correspondence information indicating, for each communication protocol, one of the decolorable toner and the non-decolorable toner for forming an image. A processor is programmed to determine the communication protocol with which the received image forming instruction information was transmitted. The processor determines, based on the correspondence information, one of the decolorable toner and the non-decolorable toner for forming an image, and controls the image forming section to print an image using the determined one of the decolorable toner and the non-decolorable toner.

An image forming apparatus includes an image bearing member, an intermediate transfer member, a reinforcing member, and a collection unit having a contact member and a support member. The contact member extends in a longitudinal direction that is orthogonal to an intermediate transfer member movement direction. One end of the contact member is fixed to the support member and the other end is in contact with the intermediate transfer member as a free end. When a maximum region in the longitudinal direction where an image is formable on a transfer medium having a maximum size that is supported by the image forming apparatus is defined as an image forming region, at least part of the reinforcing member is located outside the image forming region and, on one end side of the contact member, the reinforcing member is provided on an inner side than the end of the contact member.

An image forming apparatus includes an image forming portion including a photosensitive member and a developing portion, a sheet accommodating portion, a sheet feeding portion, and a first frame. The first frame includes an upper space supporting the image forming portion, and a lower space under the upper space. A second frame is mountable to a lower portion of said first frame. The accommodating portion and the feeding portion are replaceable with a supply container containing toner to be supplied to a developing portion of the image forming portion, in which the second frame supports the accommodating portion and the feeding portion.

A polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4). A percentage of the number of repeats of the repeating unit represented by formula (3) relative to the total number of repeats of the respective repeating units represented by formulas (1) and (3) is greater than 0% and less than 20%. In formula (1), R.sup.1 and R.sup.2 each represent, independently of one another, a hydrogen atom or a methyl group and X represents a divalent group represented by formula (X1) or (X2). In formula (2), W represents, a divalent group represented by formula (W1) or (W2).

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An image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate and a photosensitive layer disposed on the conductive substrate, the electrophotographic photoreceptor having an outermost surface layer that contains a binder resin, a charge-transporting material, and a fluorine-containing resin particle, the fluorine-containing resin particle containing 0 or more and 30 or less carboxy groups per 10.sup.6 carbon atoms, a charging device that charges the electrophotographic photoreceptor, an electrostatic latent image forming device that forms an electrostatic latent image on the electrophotographic photoreceptor that is charged, a developing device that houses a developer containing a toner and that develops, with the developer, the electrostatic latent image formed on the electrophotographic photoreceptor into a toner image, a transfer device that transfers the toner image onto a transfer-receiving medium, and an optical discharging device that, after the toner image is transferred onto the transfer-receiving medium and before the electrophotographic photoreceptor is charged, irradiates the electrophotographic photoreceptor with discharging light with a light quantity of 1.0 ?W or more and 50.0 ?W or less to perform discharging.

An image forming apparatus includes a controller substrate, a first mounting portion for a first hard disk drive, a second mounting portion for a second hard disk drive, a first connector electrically connecting the controller substrate and the first hard disk drive, a second connector electrically connecting the controller substrate and the second hard disk drive. The second connector is shifted toward a side downstream of the first connector in a hard disk drive inserting direction so as to be prevented from overlapping with the first connector as seen in a vertical direction. In the second mounting portion, a through hole extending in the vertical direction is formed at a position where the through hole overlaps with the first connector as seen in the vertical direction.

An image forming apparatus includes a controller substrate, a first mounting portion for a first hard disk drive, a second mounting portion for a second hard disk drive, a first connector electrically connecting the controller substrate and the first hard disk drive, a second connector electrically connecting the controller substrate and the second hard disk drive. The second connector is shifted toward a side downstream of the first connector in a hard disk drive inserting direction so as to be prevented from overlapping with the first connector as seen in a vertical direction. In the second mounting portion, a through hole extending in the vertical direction is formed at a position where the through hole overlaps with the first connector as seen in the vertical direction.