Abstract: A feeding device according to the present invention includes a box, paper holders, and a shifting mechanism. The box is open at Its top. The paper holders are open at their tops and positioned in the box. Each of the paper holders holds a pile of sheets of paper in it. The shifting mechanism so shifts at least one of the paper holders that the top sheet in one of the paper holders is positioned in a single freed position in the box according to selection data output from the apparatus with which the feeding device is used.

Abstract: A transport path switching unit is provided between transport rollers and pre-registration rollers, and control is performed to switch between a main transport path and an extended transport path of the transport path switching unit such that either the main transport path or the extended transport path is interposed as the part of the paper transport path between the transport rollers and the pre-registration rollers to vary a total length of the paper transport path.

Abstract: A data processing apparatus receives and stores data, and then performs processing such as the output of the stored data. The data processing apparatus nullifies already-processed data by means of deletion or overwrite. The data processing apparatus displays a reception screen for receiving from a user a priority instruction for either a processing-speed oriented priority where priority is imparted to the processing of data or a security oriented priority where priority is imparted to the nullification of data. When the security oriented priority is instructed, the data processing apparatus performs the nullification of data immediately after the processing of the data. When the processing-speed oriented priority is instructed, the data processing apparatus performs with priority the processing of data. Then, when not-yet-processed data has been completed, or alternatively after a user has left the site, the data processing apparatus performs the nullification of already-processed data.

Abstract: A paper feeder comprises an acquiring device, a driving roller, driven rollers, a driven roller supporter, a driver, and a controller. The acquiring device acquires thickness information on a sheet of paper. The driving roller rotates by being supplied with torque. The driven rollers rotate with the driving roller when in compressive contact with the driving roller. The driven roller supporter so supports the driven rollers that each of them can rotate under a different rotational load. The driver changes the position of the driven roller supporter relative to the driving roller. The controller selects one of the driven rollers on the basis of the thickness information and so activates the driver as to bring the selected roller into compressive contact with the driving roller.

Abstract: In one embodiment of the invention, in an image forming apparatus that reverses the front and back of recording paper by performing switchback transport of the recording paper to perform duplex printing of the recording paper, the image forming apparatus is provided with a control means that, when performing duplex printing of the recording paper, forms a void area at a leading end and a trailing end of the recording paper, the void area preventing curling of the recording paper around a roller.

Abstract: An image forming apparatus comprising: a main body having an image forming section; a sheet feed section having a sheet cassette that accommodates a recording sheet and can be drawn out and loaded to the main body; and a sheet misalignment preventing mechanism that intermittently comes into contact with an uppermost recording sheet in the sheet cassette so as to prevent misalignment of the recording sheet in a loading direction when the sheet cassette drawn out of the main body is reloaded.

Abstract: An image forming apparatus including: a paper feed cassette; a paper pickup roller; an image forming portion; a fixing unit; a paper discharge portion for discharging paper P with a developer image fused and fixed thereon; and an inversion roller and a paper discharge drive roller for conveying paper P along a paper conveyance path, and is constructed such that guide ribs are provided for a curved portion in a main conveyance path and the first and second curved portions of a sub conveyance path are provided in shapes that will not cause concentration of stress acting on the paper P in abutment.

Abstract: A manual sheet feeding mechanism adapted for use in a sheet processing apparatus includes a manual feeding tray and a guiding member. The manual feeding tray is adapted to be mounted on a side wall of the apparatus so as to be pivotable about an axis between an open position and a closed position. The manual feeding tray has a placement surface for placing a sheet to be manually fed into the apparatus. The guiding member is adapted to position a sheet placed on the placement surface and is provided so as to be movable on the placement surface. The manual sheet feeding mechanism also includes a moving member that is adapted, when the manual feeding tray is pivoted toward the closed position, to move the guiding member on the placement surface.

Abstract: A data processing apparatus receives and stores data, and then performs processing such as the output of the stored data. The data processing apparatus nullifies already-processed data by means of deletion or overwrite. The data processing apparatus displays a reception screen for receiving from a user a priority instruction for either a processing-speed oriented priority where priority is imparted to the processing of data or a security oriented priority where priority is imparted to the nullification of data. When the security oriented priority is instructed, the data processing apparatus performs the nullification of data immediately after the processing of the data. When the processing-speed oriented priority is instructed, the data processing apparatus performs with priority the processing of data. Then, when not-yet-processed data has been completed, or alternatively after a user has left the site, the data processing apparatus performs the nullification of already-processed data.