Abstract: A printing control apparatus to store print data in a storage area from a print application and to send the print data to a print apparatus. The printing control apparatus includes a control unit to send, when a billing code is set in a first received print data, the print data to the print apparatus and to control, when no billing code is set in the first received print data, an order of the print data so that subsequent data is sent before (or instead of) the first received print data, a display control unit to display a list of the print data received from the print application, and a setting unit to select one or more print data from the list of the print data displayed by the display control unit to set a billing code according to input by a user. Related methods are also disclosed.

Abstract: A developer material holding apparatus holds a developer. A body holds a developer material and includes a first opening through which the developer material is discharged. A shutter is assembled to the body, and is movable either to an opening position where the developer material is discharged from the body or to a closing position where the developer material is not discharged from the body. The shutter includes a second opening such that when the shutter is at the opening position, the second opening is in alignment with the first opening. At least one of the first opening and the second opening is in the form a mesh including a plurality of openings.

Abstract: An image formation apparatus includes a containing section that contains a developer and that has an opening at which a developer carrier is exposed. The developer carrier rotates at a faster first speed or a slower second speed. When a detected height of developer in the containing section is at a replenishment start level and the developer carrier is rotating at the first speed, a replenishing member replenishes developer until the height of the developer reaches a replenishment end level. When the detected height of developer is at the replenishment start level and the developer carrier is rotating at the second speed, the developer is replenished by a predetermined amount.

Abstract: A color printer includes a conveyer belt for conveying a paper sheet to make the sheet pass through a plurality of photoconductive drums. A suction roller for sucking a supplied paper sheet on the conveyer belt is provided on the upstream side of the photoconductive drums in the conveying direction of the paper sheet, such that the suction roller is in rolling contact with the belt. Transfer chargers are provided at positions opposing the photoconductive drums, respectively, with the conveyer belt situated between the drums and the transfer chargers. The running distance L1 (mm) of the conveyer belt from a sheet peeling position corresponding to the photoconductive drum at the rearmost position to a suction position where the suction roller is provided, the volume resistance .rho. (.OMEGA..multidot.cm) of the belt, and the relative dielectric constant .epsilon. of the belt are set so as to satisfy a relation of L1/V.gtoreq.(.epsilon..multidot..epsilon..sub.0 .multidot..rho.).times.7.