A sheet feeding apparatus includes an upper support portion formed integrally with a side plate and configured to support an electric circuit board; an upper opening portion formed in the side plate near the upper support portion; a lower support portion provided at a separate part mounted to the side plate and configured to support the electric circuit board; and a lower opening portion provided between the side plate and the separate part. All line segments having a length of 50 mm or less, among line segments extending from arbitrary points in a main body portion of a sheet cassette, through arbitrary points in the upper opening portion, to the electric circuit board, form an angle of 45° or more with respect to a vertical line, and the lower opening portion has a dimension of 5 mm or less or a width of 1 mm or less.

An image forming apparatus 100, which carries out constant-voltage control of a voltage applied to a transfer member 8 and is capable of executing limiter control for controlling the voltage applied to the transfer member 8 based on a detection result of a current detecting portion 21 so that the detection result falls within a predetermined range, is capable of executing a first mode in which a toner image is transferred onto a recording material P and a second mode in which a plurality of test toner images are transferred onto the recording material P by applying a plurality of different voltages to the transfer member 8, and a controller 50 is capable of carrying out the limiter control while the recording material P passes through the transfer portion 8 in executing the first mode and does not carry out the limiter control while an area onto which the plurality of test images are transferred passes through a transfer portion N2 in executing the second mode.

A printer system includes a first apparatus including a first voltage source for converting an inputted AC voltage to a first DC voltage and for outputting the converted first DC voltage, and a first controller operable by a voltage based on the first DC voltage outputted from the first voltage source; and a second apparatus including a second voltage source for converting an inputted AC voltage to a second DC voltage and for outputting the converted second DC voltage, and a second controller operable by a voltage based on the first DC voltage outputted from the first voltage source. The second apparatus includes a first switching portion for switching a state thereof between a connection state in which the AC voltage is supplied to the second voltage source and a non-connection state in which supply of the AC voltage is cut off.

A sheet accommodating apparatus includes an apparatus body, a first cassette to be drawn out in a draw-out direction with respect to the apparatus body, a second cassette disposed adjacent to the first cassette in a vertical direction, a holder member attached to the apparatus body, and a first light emitting member and a second light emitting member that are supported by the holder member. The first cassette includes a first accommodating container and a first cover. The second cassette includes a second accommodating container and a second cover. The first cover has a first hole in a position opposing the first light emitting member such that the light emitted from the first light emitting member passes therethrough. The second cover has a second hole provided in a position opposing the second light emitting member such that the light emitted from the second light emitting member passes therethrough.

In an image forming apparatus, a controller performs processes in accordance with an operation mode settable to one of a first subscription mode and a second subscription mode. The first subscription mode corresponds to a first subscription in which a specific-color cartridge is a subscription subject and a non-specific-color cartridge is not the subscription subject. The second subscription mode corresponds to a second subscription in which both the specific-color cartridge and the non-specific-color cartridge are the subscription subject. The controller performs restricting usage of the non-specific-color cartridge in a case where the first subscription mode is set as the operation mode and the type information of the non-specific-color cartridge indicates the subscription type, compared to a case where the second subscription mode is set as the operation mode and the type information of the non-specific-color cartridge indicates the subscription type.

A coupling structure is provided in an imager forming apparatus that forms an image on a recording material and configured to couple a first member and a second member. The second member includes a sheet metal having an insulative layer on a surface of a metal layer. A first conductive portion is formed in the first member. A second conductive portion includes a projection formed by press working in the second member. A coupling portion couples the first member and the second member in a state in which at least a part of the first conductive portion and at least a part of the second conductive portion are contacted with each other.

An image forming apparatus includes an upper guide unit fixed to the image forming apparatus and configured to guide an upper surface of the sheet discharged by a roller pair, a stack unit provided at a position recessed from an upper exterior unit of the image forming apparatus, and an operation unit including a display unit. The discharged sheets are stacked on the stack unit. The upper guide unit extends more to a downstream side in the discharge direction than the roller pair. The operation unit and the upper guide unit each have a portion overlapping with each other. When viewed in an axial direction of the roller pair, the operation unit and the upper guide unit are arranged at positions through which a straight line orthogonal to a plane passing through axes of rollers of the roller pair and passing through a nip portion of the roller pair passes.

An image forming apparatus includes an image bearing member, a transfer member, a power source, a detecting portion, a controller, an environment detecting portion, and a contact member. In a case that an absolute water content acquired on the basis of environmental information is a predetermined threshold or more, the controller sets a limit voltage on the basis of a detection result of the detecting portion in a state in which the recording material is absent in a transfer portion, and the controller controls the power source so that an absolute value of a voltage applied from the power source to the transfer member during contact of the recording material with the transfer member and the contact member is an absolute value or less of the limit voltage.

A control device of an image forming system including an image former that forms an image on a recording medium formed of a continuous sheet or a long sheet includes a hardware processor that calculates a width of the recording medium on a downstream side of a fixer included in the image former in a transport direction of the recording medium and outputs a shrinkage amount or a shrinkage rate of the recording medium in the transport direction due to the fixer based on the width of the recording medium and shrinkage characteristic information of the recording medium.

An image forming apparatus has an AC circuit having a heater and a triac for load control connected in series with the heater in order to control the heater. In addition, an image forming apparatus includes an overcurrent operation circuit connected in parallel with the AC circuit and through which a current flows in a state where DC power is suppliable to the AC circuit, and a polyswitch connected in series with the AC circuit and the overcurrent operation circuit, in which the polyswitch shuts off the current when an overcurrent flows in the overcurrent operation circuit.