A post-processing device includes first and second opposite members extending in a predetermined direction of a recording medium, the opposite members each including a first surface having a protrusion and a second surface having a recess, mutually facing to interpose the recording medium therebetween and being rotatable. A position of the opposite members is switched between a first position, at which the first surface of the first opposite member and the second surface of the second opposite member engage with each other and form a crease protruding in a first direction on the recording medium, and a second position, at which the second surface of the first opposite member and the first surface of the second opposite member engage with each other and form a crease protruding in a second direction reverse to the first direction on the recording medium, depending on an output destination of the recording medium.

The present disclosure is directed to a paper towel product that will capably separate from the paper towel roll as a full sheet, a half sheet or a quarter sheet. A method of making a paper towel with machine direction perforations is also disclosed.

A method of self-adaption adjustment for post-printing treatment including steps of S1: printing a plurality of identifiers on a paper sheet for positioning actual locations of treatment on the paper sheet; S2: detecting the identifiers on the paper sheet, and locating the actual locations to be treated according to the locations of the identifiers and/or relative locations among the identifiers; and S3: adjusting locations of treatment from a post-printing treatment mechanism to the paper sheet according to the actual locations output in step S2. A system of self-adaption adjustment for post-printing treatment including a printing module, a detection module, a treatment module, a driving module and a post-printing treatment mechanism. The method and system realize the self-adaption adjustment, which effectively solves the problems that an actual value after skewing or stretching or shrinking the actual printing content is inconsistent with a theoretical value of typesetting, thus effectively improving the production efficiency and production quality, which has favorable economic and social benefits. The method and system can be widely applied in various post-printing treatment systems.

A post-processing device includes first and second opposite members extending in a predetermined direction of a recording medium, the opposite members each including a first surface having a protrusion and a second surface having a recess, mutually facing to interpose the recording medium therebetween and being rotatable. A position of the opposite members is switched between a first position, at which the first surface of the first opposite member and the second surface of the second opposite member engage with each other and form a crease protruding in a first direction on the recording medium, and a second position, at which the second surface of the first opposite member and the first surface of the second opposite member engage with each other and form a crease protruding in a second direction reverse to the first direction on the recording medium, depending on an output destination of the recording medium.

The present disclosure is directed to a paper towel product that will capably separate from the paper towel roll as a full sheet, a half sheet or a quarter sheet. A method of making a paper towel with machine direction perforations is also disclosed.

The present disclosure is directed to a paper towel product that will capably separate from the paper towel roll as a full sheet, a half sheet or a quarter sheet. A method of making a paper towel with machine direction perforations is also disclosed.

An embodiment of the invention is directed to a sheet, wherein a conveying direction of the sheet relative to a sheet conveying apparatus is determined; the sheet is formed with a crease along which to fold the sheet and that is smaller than or equal to 90 M in depth and extends in a direction that crosses the conveying direction; and a grammage of the sheet is in a range of 200 to 370 g/m.sup.2.

The present disclosure is directed to a paper towel product that will capably separate from the paper towel roll as a full sheet, a half sheet or a quarter sheet. A method of making a paper towel with machine direction perforations is also disclosed.

Even when a binding process for binding a plurality of sheets without using a staple is performed after performing printing on both faces of the sheets, the binding process can be performed so that the bound sheets are not easily separated. A control method for controlling a printing apparatus, comprises: performing a binding process for binding, without using a staple, a sheet on which an image is printed based on image data; specifying an area where the binding process is to be performed, the area being included in the image data; deleting image data of the specified area; and printing the image on the sheet based on the image data on which deleting is performed.

A device for hot-foil stamping on printing materials includes a heated stamping cylinder, a counterpressure cylinder, and a device for providing stamping foil. The device for providing stamping foil guides the stamping foil between the stamping cylinder and the counterpressure cylinder in a direction tangential to the cylinders. The device for providing stamping foil has an adjustable guide element that is disposed downstream of the stamping cylinder and of the counterpressure cylinder for guiding the stamping foil. The hot-foil stamping device advantageously allows the stamping quality to be optimized.