Abstract: An image forming apparatus includes a drive roller configured to be rotated by a drive source, a first rotation member configured to be driven to rotate by the drive roller, and a second rotation member configured to be driven to rotate by the drive roller. The drive roller, the first rotation member, and the second rotation member are configured to convey a sheet in a state where the sheet is present at a first nip portion and a second nip portion at the same time.

Abstract: A sheet reversing device has a vertical first conveyance path, a horizontal second conveyance path into which a sheet is carried via the first conveyance path and a horizontally third conveyance path into which the switched-back sheet is carried from the second conveyance path. A curved guide plate is disposed between the first and second conveyance paths and includes a curved guide surface for guiding the sheet to the second conveyance path, and a pivotal guide pivotably supported with a part thereof projecting from the curved guide surface. The pivotal guide pivots to retract into the inner side of the curved guide by being pushed by the sheet moving from the first conveyance path toward the second conveyance path while guiding the sheet switched back and carried out from the second conveyance path toward the third conveyance path with the part thereof projecting from the curved guide surface.

Abstract: An image forming member has a first sheet conveying member arranged at upstream side of a sheet conveying path of a sheet material, a second sheet conveying member arranged at downstream side of said sheet conveying path, a guide member which is provided between the first and the second sheet conveying members and guides the sheet material and a movable portion which is provided in the guide member and executes front-and-far-side adjustment of the sheet material by moving a portion against which the tip of sheet material is abutted in parallel to a sheet width direction perpendicular to a conveying direction.

Abstract: A printer (24) for printing upon a continuous web of print receivable media (18) is provided. The printer includes a print head (28) having a media drive assembly side and a media drive assembly for moving the media across the print head. The media drive assembly is disposed only on the media drive assembly side of the print head. The printer further includes a platen (30) disposed adjacent the print head and a controller (102) coupled to the print head, the media drive assembly, and the platen. The controller controls the printer during continuous printing and single sheet printing. During continuous printing, the media is moved in a downstream direction past the print head. During single sheet printing, the media is moved past the print head in an upstream direction one sheet at a time. Further, the printer may perform single sheet pull printing or single sheet push printing.

Abstract: A method and apparatus for flattening a substrate against a surface of a platform is provided. The method comprising positioning guides within a platform so that opposite edges of a substrate placed on the platform do not come in contact with at least one print head in close proximity over the substrate.

Abstract: Systems and methods for duplex printing of print sheets are described. In one aspect, a duplex module is configured so that print sheets may be controllably and reliably re-introduced into a print module in an orientation that is suitable for marking the second side of the print sheet without requiring a support structure that spans the entire width of the print sheet. In large format printing applications, this feature avoids large and heavy support structures, such as feed rollers, that otherwise would be needed to support the print sheets, as well as their own weight. In this way, a printing apparatus may provide duplex printing functionality with a structure that has a relatively light weight and a relatively small overall footprint.

Abstract: To prevent wavy swell from causing in sheet in transferring thereof and avoid wrinkle from being produced in later printing steps, there is provided a sheet transfer machine forward from a printing drum and a press roll. The machine is provided with upper and lower guide plates respectively formed with hole portions. Upper and lower rolls are disposed at the hole portions. There are provided hold rollers for pressing sheet coming from between the upper and the lower guide plates to an upper face of the lower guide plate downstream from the upper roll in a direction of transferring print sheet. In printing, swell is prevented from being produced by pressing the print sheet coming from between the two rolls by the hold rollers. When the sheet is sandwiched by the printing drum and the press roll and printed in later steps, wrinkle is not produced in the print sheet.

Abstract: A sheet feeding mechanism includes a sheet feed roller for transporting a sheet along a paper transport path, and a sheet-pressing member disposed so as to press the sheet feed roller. The sheet-pressing member integrally includes a pressing portion which is formed by increasing the diameter of a part of a coiled portion of a compression coil spring.

Abstract: In a page-turning device for a printer, arms are provided at the ends of a support shaft, and a pair of rollers are fitted around a roller shaft that is located between the distal ends of arms. Springs are attached to the base ends of the arms to press the rollers against a medium to be printed. Depending on the width of the medium, the positions of adjustment brackets can be changed, such that the urging forces produced by the springs are adjusted, so as to control the pressing forces exerted by rollers, thereby assuring substantially uniform force application onto at least two locations of the page such that the page can be readily turned without inappropriate folding, bending or creasing.