Abstract: A conveyance path forming body includes: a first surface that is disposed on an opposite side of a sheet to a processing unit disposed on a side of one surface of the sheet being conveyed along a conveyance path to perform processing on the one surface; and a second surface that is disposed at a downstream of the first surface in a conveying direction of the sheet so as to be more distant from the processing unit than a hypothetical extension surface of the first surface.

Abstract: There provided a guide member including: a first guide member that is disposed to face a first surface of a sheet which is transported to a first direction and that guides the sheet in front and at the rear of a processing position at which a process is performed on the first surface; and a second guide member that is disposed to face a second surface of the sheet and guides the sheet, wherein the second guide member includes specific plural convex portions.

Abstract: Provided is a transport device including a first roller that is driven to rotate by a driving section, and transports a recording medium, a second roller that includes a second rotating shaft and a second rotating section, and pushes the transported recording medium against the first roller, the second rotating section including a first member that comes into contact with the recording medium, and a second member that comes into contact with the second roller when the recording medium having a predetermined size is transported, and a measurement unit that measures speed at which second rotating shaft rotates, wherein a force with which the first member rotates the second rotating shaft is greater than a force with which the second member rotates the second rotating shaft.

Abstract: Provided is a transport device including a first roller that is driven to rotate by a driving section, and transports a recording medium, a second roller that includes a second rotating shaft and a second rotating section, and pushes the transported recording medium against the first roller, the second rotating section including a first member that comes into contact with the recording medium, and a second member that comes into contact with the second roller when the recording medium having a predetermined size is transported, and a measurement unit that measures speed at which second rotating shaft rotates, wherein a force with which the first member rotates the second rotating shaft is greater than a force with which the second member rotates the second rotating shaft.

Abstract: There provided a guide member including: a first guide member that is disposed to face a first surface of a sheet which is transported to a first direction and that guides the sheet in front and at the rear of a processing position at which a process is performed on the first surface; and a second guide member that is disposed to face a second surface of the sheet and guides the sheet, wherein the second guide member includes specific plural convex portions.

Abstract: A conveyance path forming body includes: a first surface that is disposed on an opposite side of a sheet to a processing unit disposed on a side of one surface of the sheet being conveyed along a conveyance path to perform processing on the one surface; and a second surface that is disposed at a downstream of the first surface in a conveying direction of the sheet so as to be more distant from the processing unit than a hypothetical extension surface of the first surface.

Abstract: An internal residual stress calculating device includes a prediction unit that predicts a temporal variation in deformation which is received by a medium having an image formed thereon from a correcting device correcting a deformation, and a calculation unit that calculates an internal residual stress of the medium having passed through the correcting device on the basis of a relational expression including an elasticity term and a term related to a plastic deformation and the temporal variation in deformation predicted by the prediction unit.

Abstract: Provided is a transporting device including a first contact member having a first contact portion that contacts a medium transported, a second contact member having a second contact portion that contacts the medium transported, on the downstream side of the first contact portion in a transporting direction, the first contact portion and the second contact portion each having a tangential plane, and the tangential planes coinciding with each other, a transporting unit that transports the medium so that a first surface of the medium coincides with the tangential plane in a section of the first contact portion to the second contact portion, and a processing unit that is arranged between the first contact portion and the second contact portion, and performs processing on the first surface of the medium that is passing through a processing region.

Abstract: An information processor includes a storage unit storing a first coefficient in correspondence with a characteristic of a sheet of paper, a first acquisition unit acquiring a first signal based on the water content of a first sheet of paper not having an image formed thereon, a second acquisition unit acquiring a second signal based on the water content of the first sheet of paper having an image formed thereon and being heated for fixing, a determination unit determining the characteristic of the first sheet of paper, a first calculation unit calculating a variation in water content of the first sheet of paper using the difference between the first signal and the second signal and the first coefficient stored in correspondence with the determined characteristic, and a second calculation unit calculating an expansion and contraction ratio of the first sheet of paper using the variation in water content.

Abstract: An image forming apparatus includes a forming section that forms an image on a side of paper; a fixing section that applies heat to fix the image onto the side of the paper; a paper reversing section that reverses a front and back of the paper having the image fixed onto a first side in the fixing section; a first measuring section that is provided between a registration roller and the forming section to measure a first moisture content of the paper before an image is formed on the first side, and a second moisture content of the paper before an image is formed on a second side, after the image is fixed on the first side; and a calculating section that calculates amount of change of the size of the paper on the basis of the difference between the first moisture content and the second moisture content.

Abstract: An internal residual stress calculating device includes a prediction unit that predicts a temporal variation in deformation which is received by a medium having an image formed thereon from a correcting device correcting a deformation, and a calculation unit that calculates an internal residual stress of the medium having passed through the correcting device on the basis of a relational expression including an elasticity term and a term related to a plastic deformation and the temporal variation in deformation predicted by the prediction unit.

Abstract: An information processor includes a storage unit storing a first coefficient in correspondence with a characteristic of a sheet of paper, a first acquisition unit acquiring a first signal based on the water content of a first sheet of paper not having an image formed thereon, a second acquisition unit acquiring a second signal based on the water content of the first sheet of paper having an image formed thereon and being heated for fixing, a determination unit determining the characteristic of the first sheet of paper, a first calculation unit calculating a variation in water content of the first sheet of paper using the difference between the first signal and the second signal and the first coefficient stored in correspondence with the determined characteristic, and a second calculation unit calculating an expansion and contraction ratio of the first sheet of paper using the variation in water content.

Abstract: An image forming apparatus includes a forming section that forms an image on a side of paper; a fixing section that applies heat to fix the image onto the side of the paper; a paper reversing section that reverses a front and back of the paper having the image fixed onto a first side in the fixing section; a first measuring section that is provided between a registration roller and the forming section to measure a first moisture content of the paper before an image is formed on the first side, and a second moisture content of the paper before an image is formed on a second side, after the image is fixed on the first side; and a calculating section that calculates amount of change of the size of the paper on the basis of the difference between the first moisture content and the second moisture content.

Abstract: A recording sheet including base paper including pulp fiber and filler, wherein the recording sheet further includes carboxylic acid. An ink jet recording method and an electrophotographic image recording method using the recording sheet.

Abstract: The present invention provides a recording paper comprising pulp fibers and filler as main components and containing at least a cationic substance and a water-soluble polymer in a surface of the recording paper, wherein conductivity of water is not less than 0.002 S/m as measured at 1 second after immersing a piece of the recording paper with an area of 0.05 m2 in 40 ml of pure water.

Abstract: An image recording apparatus is disclosed wherein an image is recorded on a recording medium based on image information by ejecting liquid droplets from a liquid droplet ejecting head. A liquid droplet ejecting head is provided which has an ejection region substantially corresponding to a width of the recording medium. A conveyor unit is provided which conveys the recording medium to the ejection region of the liquid droplet ejecting head with the recording medium attracted and attached thereto and supported thereon. The recording medium is fed from the conveyor unit to a paper discharge section. Further, a plurality of attracting and supporting sub-units are provided which are vertically moved with the recording medium, which is delivered thereto from the conveyor unit, attracted and attached thereto and supported thereon, thereby conveying the recording medium to a subsequent step.

Abstract: A recording paper containing pulp fibers and filler as main components and containing at least a heterocyclic carboxylic acid and a water-soluble polymer in the surface of the recording paper, wherein the surface contains at least one kind of cationic substance selected from the group consisting of a cationic organic molecule and a metal salt containing a metal cation of valency two or greater.

Abstract: A recording sheet including base paper including pulp fiber and filler, wherein the recording sheet further includes carboxylic acid. An ink jet recording method and an electrophotographic image recording method using the recording sheet.

Abstract: A recording paper including a substrate which includes cellulose pulp and has a surface treated with a surface sizing solution, wherein the surface sizing solution contains a surface sizing agent and a nonionic surfactant having an HLB in a range of 6 to 13, a content of the nonionic surfactant is in a range of 1 to 100 parts by weight per 100 parts by weight of the surface sizing agent, and the surface sizing agent has a contact angle with water in a range of 40 to 75°.

Abstract: A recording paper using at least a cellulose pulp as a raw material includes a thermosetting material which is a natural product, an extract of a natural product or a derivative of a natural product.