An image forming apparatus includes a registration unit, a first paper feeding unit, a second paper feeding unit, and a control unit, which performs a primary paper feeding for conveying a paper sheet to a registration position, finishes the primary paper feeding at timing when the paper sheet reaches the registration position, and then after operating a target paper feeding unit until a preceding feeding time elapses, performs a secondary paper feeding for conveying the paper sheet to the printing position. The control unit sets different values of the preceding feeding time for the case where the first paper feeding unit is the target paper feeding unit and the case where the second paper feeding unit is the target paper feeding unit.

A feeding apparatus includes a feeding member, first and second conveying members, a separation member, and drive and control units. The feeding member feeds a recording material placed on a tray. The separation member and the first conveying member form a nip portion and separates recording materials at the nip portion. The second conveying member conveys a conveyed recording material. The drive unit drives at least the feeding member. The control unit controls to feed first and second recording materials such that a second recording material front edge passes the nip portion before a first recording material rear edge passes the nip portion, and controls to stop the second recording material after the second recording material front edge has passed the nip portion such that the first recording material rear edge reaches the second conveying member before the second recording material front edge reaches the second conveying member.

A high-voltage power supply includes: a first high-voltage output circuit having a first output connected to a first load, and a second output, and capable of outputting a first voltage having a first polarity to the first load; a voltage clamping element connected to the second output and configured to clamp a voltage at the second output to a second voltage having a second polarity opposite to the first polarity; a second high-voltage output circuit having a third output connected to the second output and a fourth output, and capable of outputting a third voltage having the first polarity; and an output circuit connected to the fourth output and a second load, and configured to produce a voltage having the first polarity and a voltage having the second polarity using the third voltage and a voltage derived from the second voltage and output the produced voltages to the second load.

An information processing apparatus includes a first processor and a second processor. The first processor is operable to perform first processing and second processing in one of a plurality of operating states. The operating states includes a normal state and a power-saving state. The power-saving state is a state in which the first processor consumes less power than the normal state. The second processor is operable to perform the second processing while consuming less power than the first processor does. The second processor detects the first processing that the second processor is not able to perform. The second processor also causes the first processor to transition from the sleep state to the power-saving state to perform the first processing when the first processor is in a sleep state in which a power supply is stopped.

The present sheet processing apparatus comprises: a pressure tooth part that has a concave-convex surface and pressurizes the sheet bundle; a receiving tooth part that is disposed opposite to the pressure tooth part so as to receive pressurization from the pressure tooth part with the sheet bundle held therebetween; a moving part that reciprocates the pressure tooth part with respect to a receiving surface of the receiving tooth part; and a drive part that drives the moving part that moves the pressure tooth part for crimping of the sheet bundle. The pressure tooth part is divided in the direction crossing the pressurizing direction of the pressure tooth part into a plurality of pressure tooth parts, and the obtained pressure tooth parts are sequentially pressurized for crimping.

A biasing portion biases a restricting portion in a direction opposite to a direction in which a drive source drives the restricting portion. Each of a lock cover and the restricting portion includes an engaging portion that has a contact surface, and when the lock cover is closed, the contact surfaces of the lock cover and the restricting portion are engaged with each other while facing each other. The contact surfaces of the lock cover and the restricting portion are not parallel to each other in a state where the lock cover is closed, and as the lock cover is displaced in an opening direction of the lock cover when the drive source is not driving the restricting portion, one or both of the engaging portions are bent and the contact surfaces become parallel to each other.

The invention provides a developer cartridge with a counting mechanism. The developer cartridge comprises a developer and the counting mechanism, wherein the counting mechanism is provided with protrusions which come in contact with a contact lever on an electronic photographing device so as to count the developer cartridge; and each protrusion has a first position and a second position in the direction perpendicular to a side wall of the developer cartridge, and is, in the first position, in contact with the contact lever, but is not, in the second position, in contact with the contact lever. The working principle of the developer cartridge adopting the counting mechanism is greatly different from the prior art. Therefore, the structure of the counting mechanism of the developer cartridge is simpler and more convenient and reliable; the production precision and the production cost are reduced; and the market competitiveness of the developer cartridge is improved.

An image forming apparatus includes an operating section. The operating section projects forward from an upper housing of the image forming apparatus. The operating section includes an input section and a display section. The input section is for receiving input of image forming information. The display section is disposed adjacent to the input section and displays the image forming information thereon. A position of the display section is switchable between a first position and a second position. The first position is where the display section is flush with the input section. The second position is where the display section is tilted forward more than the input section, by turning the display section on a front edge side of the display section as a pivot to raise a rear edge side of the display section upward from the first position.

An image formation apparatus includes a transfer unit configured to transfer a second material with different solubility from that of a first material to a second position of a print medium where the second material comes into contact with the first material in a first position of the print medium, and a fixation unit configured to melt the second material transferred to the second position of the print medium, and fix the second material to the print medium.

An image forming apparatus includes a developing device, a plurality of feeding and delivering paths through which a printing medium is delivered to the developing device, a feeding roller unit which forms a developing and delivering path in which the plurality of feeding and delivering paths are joined and delivers the printing medium to the developing device, and a guide unit which guides the printing medium passing through the plurality of feeding and delivering paths to the feeding roller unit and is rotatably provided to expose the plurality of feeding and delivering paths to the outside. In the above configuration, the printing medium jam problems inside the image forming apparatus are easily cleared.