An accumulation device is provided with a loading unit, a tensioning unit, an accumulation unit, and unloading unit and a controller. The tensioning unit comprises multiple fixed rollers capable of rolling, and movable rollers capable of rolling and arranged so as to be capable of moving with respect to the fixed rollers. Substrates are conveyed so as to move back and forth alternately between the fixed rollers and the movable rollers in a wrapped state, and a prescribed tensile force is applied to the substrates by a force acting on the moveable rollers in the direction away from the fixed rollers. The controller performs control so as to maintain the positions of the movable rollers in the tensioning unit constant.

An accumulation device is provided with a loading unit, a tensioning unit, an accumulation unit, and unloading unit and a controller. The tensioning unit comprises multiple fixed rollers capable of rolling, and movable rollers capable of rolling and arranged so as to be capable of moving with respect to the fixed rollers. Substrates are conveyed so as to move back and forth alternately between the fixed rollers and the movable rollers in a wrapped state, and a prescribed tensile force is applied to the substrates by a force acting on the moveable rollers in the direction away from the fixed rollers. The controller performs control so as to maintain the positions of the movable rollers in the tensioning unit constant.

An image forming apparatus includes the following. An image carrier carries a toner image. A transfer unit transfers a toner image held by the image carrier onto a sheet. A controller controls a relation of a position between the image carrier and the sheet so that the sheet continues to come into contact with the image carrier from a position where a distance from a transfer nip is within a predetermined range when the sheet enters the transfer nip during an image forming job. The transfer nip is formed by the image carrier and the transfer unit.

The invention relates to a device for decurling a web of material, such as a paper web, which device comprises: a first main roller; a second main roller arranged parallel to and at a distance of the first main roller, wherein the first main roller and the second main roller are arranged in a main plane; and a decurling roller arranged parallel to and between the first and second main roller, when viewed in a direction perpendicular to the main plane, wherein the spacing between the first main roller and the second roller is smaller than the diameter of the decurling roller.

The invention relates to a device for decurling a web of material, such as a paper web, which device comprises: a first main roller; a second main roller arranged parallel to and at a distance of the first main roller, wherein the first main roller and the second main roller are arranged in a main plane; and a decurling roller arranged parallel to and between the first and second main roller, when viewed in a direction perpendicular to the main plane, wherein the spacing between the first main roller and the second roller is smaller than the diameter of the decurling roller.

A medium flattening method, when a medium is transported by being adhered to an adhesive layer which is on a surface of a transport belt, includes detecting a presence or absence of floating being generated in the medium on the transport belt using a sensor, executing a process for flattening to flatten the floating in the medium in the case where the floating exists, and transporting the medium, where the floating is eliminated using the process for the flattening, to a liquid discharge region of a liquid discharge section. The executing of the process for the flattening includes executing the process for the flattening with regard to the medium and liquid discharge with regard to the medium in parallel.

A paper humidifying apparatus includes humidifying rollers, a first drive unit and a controller. The humidifying rollers, forming a pair, are pressed against each other forming a nip portion and apply moisture to a sheet of paper when sandwiching and conveying the sheet of paper. The first drive unit which makes the humidifying rollers separate from each other or press against each other. The controller controls the first drive unit. The controller controls the first drive unit so as to make the humidifying rollers separate from each other and receive the sheet of paper, and after a tip of the sheet of paper passes a position corresponding to the nip portion, the controller controls the first drive unit so as to make the humidifying rollers press against each other to apply moisture to the sheet of paper.

A paper humidifying apparatus includes humidifying rollers, a first drive unit and a controller. The humidifying rollers, forming a pair, are pressed against each other forming a nip portion and apply moisture to a sheet of paper when sandwiching and conveying the sheet of paper. The first drive unit which makes the humidifying rollers separate from each other or press against each other. The controller controls the first drive unit. The controller controls the first drive unit so as to make the humidifying rollers separate from each other and receive the sheet of paper, and after a tip of the sheet of paper passes a position corresponding to the nip portion, the controller controls the first drive unit so as to make the humidifying rollers press against each other to apply moisture to the sheet of paper.

A printer, comprising: a printing part; a conveying mechanism to send out a print medium from a medium roll around which the print medium is wound, the conveying mechanism comprising a correcting mechanism to correct curl of the print medium in a winding direction by curving the print medium in a reverse direction of the winding direction; and a controller configured to: store a finish time of the printing; obtain a start time when next printing is started; determine whether an elapsed time elapsed from the finish time to the start time is longer than a particular time; when the elapsed time is longer than the particular time, cause the conveying mechanism to convey the print medium by a particular length which is longer than a length between the correcting mechanism and the printing part; and cause the printing part to perform the printing.

A printer, comprising: a printing part; a conveying mechanism to send out a print medium from a medium roll around which the print medium is wound, the conveying mechanism comprising a correcting mechanism to correct curl of the print medium in a winding direction by curving the print medium in a reverse direction of the winding direction; and a controller configured to: store a finish time of the printing; obtain a start time when next printing is started; determine whether an elapsed time elapsed from the finish time to the start time is longer than a particular time; when the elapsed time is longer than the particular time, cause the conveying mechanism to convey the print medium by a particular length which is longer than a length between the correcting mechanism and the printing part; and cause the printing part to perform the printing.