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.

This image forming apparatus (100) is equipped with: a document set detector (3a, S1, S5); a document size detector (3a, S2, S3, S5); a manual feeder (6) with a manual feed tray (61) that is not equipped with a sensor for detecting the size of set manually-fed paper; a printer (5) that performs printing on the basis of image data; an operation panel (4) that receives setting for feeding paper from the manual feeder (6); and a controller (7) that recognizes the size of a set document and performs manually-fed-paper automatic setting for recognizing the recognized size of the set document as the size of the manually-fed paper.

A method for scheduling a reload of a supply material in a printing system including a print engine capable of printing at a settable print velocity while using the supply material, a control unit for controlling a print job queue comprising at least one print job scheduled to be printed by means of a scheduling scheme while using the supply material, a supply material input holder for holding the supply material, and a user interface for interacting with a user of the printing system. The method includes determining a plurality of moments in time that the supply material input holder is empty, and simultaneously scheduling for each determined moment in time of the plurality of moments in time a reload event of reloading the supply material input holder with the supply material in the scheduling scheme. The plurality of moments in time is determined by taking into account the total planned usage of the supply material from the supply material input holder according to print job specifications of the at least one print job scheduled in the print job queue and a capacity of the supply material input holder with respect to the properties of the supply material, and each of the determined moments in time is established on the basis of the settable print velocity of the printing system with respect to the at least one print job in the print job queue.

A system and method of printing involves the use of mixed paper sizes in which the orientation of printing media can be selected to avoid a mixture of paper sheet orientations in the output document when auto tray selection has been selected by a user.

Provided is a printing apparatus including a cassette configured to be capable of managing a stored paper-sheet by using paper-sheet size information and paper-sheet attribute data, in which an adjustment value of a print position is registered to copied paper-sheet attribute data if an event in which the adjustment value is registered to paper-sheet attribute data in which the paper-sheet size information is not set occurs.

A method for feeding uneven media from a high capacity feeder includes rotating the pages in a stack 180° every 100-250 pages. This is only done with non-flat pages, such as, envelopes, pages with labels thereon, etc., which create tilted stacks and limit the number of pages that can be placed in the high capacity feeder. Rotating the pages 180° distributes the uneven build-up of the pages and creates a relatively flat stack, allowing the high capacity feeder to be filled to capacity. A camera or sensor placed in the high capacity feeder will detect the orientation of the stack on the fly so the image can be rotated accordingly.

A printing apparatus includes a reading unit to read a document image to generate image data, and a printing unit to print an image of the image data on a sheet supplied from any of multiple sheet storage portions. The printing apparatus determines whether an automatic selection function is enabled or disabled. The automatic selection function automatically selects, from among the sheet storage portions, a source for supplying a sheet that is used for printing. If the automatic selection function is enabled and a user specifies a predetermined sheet storage portion that has no sheet stored therein, the job execution instruction is not allowed. If the automatic selection function is disabled and a sheet storage portion that supplies a sheet for printing from among the plurality of sheet storage portions has no sheet stored therein, the job execution instruction is allowed.

A series of conveyance paths to convey a recording medium is formed across a printer and a post-processing device in a printing system. The printing system includes: a detection unit that detects that the post-processing device has entered a predetermined state; and a paper feeding control unit that limits the number of recording media fed to the conveyance path, when it is not detected that the post-processing device has entered the predetermined state, based on the number of recording media conveyable to the post-processing device after the post-processing device enters the predetermined state.

An automatic document feeder (300) includes a housing (301), conveyance roller pairs (313 to 317), and a pressure releasing mechanism. The housing (301) is openably/closably attached to a main body of an image forming apparatus. The conveyance roller pairs (313 to 317) pinch an original document sheet with pressure and feed the original document sheet. The pressure releasing mechanism detaches one rollers (313b to 317b) of the conveyance roller pairs (313 to 317) from the other rollers (313a to 317a) in conjunction with an operation of opening the housing 301 against the main body.

In an image forming apparatus, a control device functions as a controller and a user presence/absence determiner. When accepting an instruction to execute a print job through a touch panel, the controller controls operations of a sheet feed device, a conveyance device, and an image forming device to allow a document image represented by image data generated by a document reading device to be formed on a sheet to make a printed matter and allow the printed matter to be discharged to a sheet output tray. When the user presence/absence determiner determines that a user is present, the controller controls, before printing for at least a last sheet in the print job, the operations of the sheet feed device and the conveyance device to allow a sheet to be discharged to the sheet output tray without allowing the image forming device to form the document image on the sheet.