Provided are an image forming apparatus and an image forming method capable of coping with a medium exceeding a transport limit of a pair of rollers in image formation in which the medium is transported with the medium interposed between the pair of rollers. In a case where a medium exceeding a transport limit of first transport means to which medium transport using a first roller and a second roller is applied is used, second transport means is used to assist in the medium transport performed by the first transport means. The driving of second driving means for driving the second transport means is controlled using a driving signal applied to the driving control of the first driving means for driving the first transport means. Medium transport in which synchronization is taken between the first transport means and the second transport means is realized.

Provided are an image forming apparatus and an image forming method capable of coping with a medium exceeding a transport limit of a pair of rollers in image formation in which the medium is transported with the medium interposed between the pair of rollers. In a case where a medium exceeding a transport limit of first transport means to which medium transport using a first roller and a second roller is applied is used, second transport means is used to assist in the medium transport performed by the first transport means. The driving of second driving means for driving the second transport means is controlled using a driving signal applied to the driving control of the first driving means for driving the first transport means. Medium transport in which synchronization is taken between the first transport means and the second transport means is realized.

A printer including: a platen roller; a housing that holds the platen roller; and a print head that is mounted on the housing and performs printing on a sheet; wherein the platen roller includes a columnar straight part, and a first taper part that is formed on both ends of the straight part and has a diameter which changes towards an outside from the straight part along an axial direction.

A conveying device includes a pair of rotary bodies and a movable member. The pair or rotary bodies includes a first rotary body disposed in a first region, and a second rotary body disposed in a second region and facing the first rotary body across a sheet conveyance passage through which a sheet applied with liquid is conveyed. The movable member is disposed upstream from the first rotary body in a sheet conveyance direction. The movable member is configured to move between the first region and the second region with respect to the sheet conveyance passage. The movable member is configured to move to the second region in a middle of conveyance of the sheet between the first rotary body and the second rotary body.

A conveying device includes a pair of rotary bodies and a movable member. The pair or rotary bodies includes a first rotary body disposed in a first region, and a second rotary body disposed in a second region and facing the first rotary body across a sheet conveyance passage through which a sheet applied with liquid is conveyed. The movable member is disposed upstream from the first rotary body in a sheet conveyance direction. The movable member is configured to move between the first region and the second region with respect to the sheet conveyance passage. The movable member is configured to move to the second region in a middle of conveyance of the sheet between the first rotary body and the second rotary body.

An image forming apparatus includes: a pretreatment section that applies a precoat liquid to a printing surface of a continuous recording medium to be transported; a printing section that sprays ink onto the continuous recording medium to which the precoat liquid is applied; and a transport section that transports the continuous recording medium along a predetermined path. The transport section includes at least one pass roller that is disposed between the pretreatment section and the printing section, the pass roller transporting the continuous recording medium to which the precoat liquid is applied toward the printing section and coming into contact with the printing surface of the continuous recording medium. A surface of the pass roller is subjected to water-repellent finishing for the precoat liquid.

A tube pump that sends a fluid includes a tube, a roller, and a roller holder. In the roller holder, a guide groove is formed that receives a shaft of the roller and defines a range in which the roller is movable with respect to the roller holder. The roller holder has an inner side surface and an outer side surface as surfaces defining the guide groove in the roller holder. The inner side surface has a protrusion protruding toward the outer side surface.

An elastic roller is capable of elastic deformation at low load, lightweight and low-cost, and the surface speed of the roller has been made stable. At a drawing showing the view from the side of pipe 2 and flange 3 which make up roller 1, roller 1 which has pipe 2 and flange 3 is supported by shaft 8 which is inserted therein along axis 8a of shaft 8, the situation being such that elastic deformation occurs upon being pressed downward by pressure P from pressure-applying body 11 above pipe. None of the four outermost ribs 7a disposed in outermost gap 6a between outermost ring 4a of flange 3 and middle ring 4b which is mutually adjacent thereto and toward the interior therefrom is present in the upper portion of pipe 2.

Provided is a paper feeding roll that prevents paper transportation failures over a long time. A paper feeding roll 10 is provided with an axial body 12 and an elastic layer 14 formed on an outer periphery of the axial body 12. The circumferential surface of the elastic layer 14 has a plurality of projections 16 forming surface unevenness. Each projection 16 of the plurality of projections 16 is shaped such that a position X of a distal-end part preceding in an opposite direction to a paper feeding direction precedes, in the opposite direction to the paper feeding direction, a position Y of a base-end part preceding in the opposite direction to the paper feeding direction.

A contacting member contacts a region of a contacted member to which a liquid composition has been applied. The contacting member contains a substrate, a fluororesin fiber layer, an adhesive layer, and a mixed layer. The fluororesin fiber layer contains a fluororesin fiber and is configured to contact the contacted member. The adhesive layer contains an adhesive member directly or indirectly fixing the fluororesin fiber layer to the substrate. In the mixed layer, the fluororesin fiber in the fluororesin layer and the adhesive member in the adhesive layer are mixed. A thickness of the mixed layer is from 5% or more and 60% or less with respect to a thickness of the fluororesin fiber layer.