An interleaving unit, comprising a pair of rolls (1, 2) set alongside one another and counter-rotating and provided with respective first and second folding tools (3, 4; 5, 6) set at a distance from one another along the circumferential development of the respective peripheral surfaces so as to operate in a common point of tangency (Z) on a succession of sheets (7a, 7b) fed between the two rolls, said tools (3, 4; 5, 6) being set on respective mobile cylinder sectors (8, 9, 10, 11) to enable positioning thereof at an adjustable distance apart along the circumferential development of a corresponding roll (1, 2), said interleaving unit comprising means (M1, M2, U) for independently adjusting the speed of rotation of one or more of said sectors according to their angular position in order to reduce or increase the peripheral speed of said sectors with respect to a speed of feed (Vm) of said sheets.

A sheet processing apparatus includes: a second conveying roller pair that receives and conveys a sheet conveyed by a first conveying roller pair; a first folding roller pair that forms a first fold on the sheet; and a first rotation unit capable of rotating the second conveying roller pair and the first folding roller pair. One roller of the second conveying roller pair and one roller of the first folding roller pair are a common roller shared therebetween. The second conveying roller pair causes the sheet to be deflected and guided to the first folding roller pair, and the first folding roller pair forms the first fold on the deflected sheet by rotating the first rotation unit in a certain direction in a state in which the sheet is held by the first conveying roller pair and the second conveying roller pair.

A sheet processing apparatus includes: a second conveying roller pair that receives and conveys a sheet conveyed by a first conveying roller pair; a first folding roller pair that forms a first fold on the sheet; and a first rotation unit capable of rotating the second conveying roller pair and the first folding roller pair. One roller of the second conveying roller pair and one roller of the first folding roller pair are a common roller shared therebetween. The second conveying roller pair causes the sheet to be deflected and guided to the first folding roller pair, and the first folding roller pair forms the first fold on the deflected sheet by rotating the first rotation unit in a certain direction in a state in which the sheet is held by the first conveying roller pair and the second conveying roller pair.

Systems and methods for folding and stacking fanfold corrugated board material. A system may include a rotatable member (e.g., a wheel) having a number of head pieces disposed thereon. Each head piece has a vacuum setting that can be used to pick up a portion of a length of fanfold and hold it while the rotatable member rotates around its axis and a second blower setting that blows the portion of the length of fanfold that was picked up and rotated around the rotatable member down onto a stack of fan fold. Such a system is capable of forming regular and consistent stacks of fanfold material efficiently and cost effectively without the need for significant human intervention.

A sheet processing apparatus includes: a second conveying roller pair that receives and conveys a sheet conveyed by a first conveying roller pair; a first folding roller pair that forms a first fold on the sheet; and a first rotation unit capable of rotating the second conveying roller pair and the first folding roller pair. One roller of the second conveying roller pair and one roller of the first folding roller pair are a common roller shared therebetween. The second conveying roller pair causes the sheet to be deflected and guided to the first folding roller pair, and the first folding roller pair forms the first fold on the deflected sheet by rotating the first rotation unit in a certain direction in a state in which the sheet is held by the first conveying roller pair and the second conveying roller pair.

A sheet processing apparatus includes: a second conveying roller pair that receives and conveys a sheet conveyed by a first conveying roller pair; a first folding roller pair that forms a first fold on the sheet; and a first rotation unit capable of rotating the second conveying roller pair and the first folding roller pair. One roller of the second conveying roller pair and one roller of the first folding roller pair are a common roller shared therebetween. The second conveying roller pair causes the sheet to be deflected and guided to the first folding roller pair, and the first folding roller pair forms the first fold on the deflected sheet by rotating the first rotation unit in a certain direction in a state in which the sheet is held by the first conveying roller pair and the second conveying roller pair.

A method and a device are specified for depositing a flexible material web, wherein the material web (2) is supplied by means of a supply means and deposited in a zigzag shape at a depositing location (2) by means of a laying means, wherein the material web (2) after exiting from the supply means is contacted by at least two engagement elements (5, 6), which can be moved at least in opposite laying directions (A, B), of the laying means and is guided to the depositing location (2). The engagement elements (5, 6) change their position during the contact with the material web (1) between an engagement position (E) and a release position (F), the quality of the deposited material web remaining largely unaffected, because each engagement element (5, 6) has a contact section (7, 8), which can be brought into a contact position (K) in the engagement position (E) and into an idle position (L) in the release position (F), wherein the movement direction (C, D) of the contact section (7, 8) is oriented at a downward angle to the laying direction (A, B).

A method and a device are specified for depositing a flexible material web, wherein the material web (2) is supplied by means of a supply means and deposited in a zigzag shape at a depositing location (2) by means of a laying means, wherein the material web (2) after exiting from the supply means is contacted by at least two engagement elements (5, 6), which can be moved at least in opposite laying directions (A, B), of the laying means and is guided to the depositing location (2). The engagement elements (5, 6) change their position during the contact with the material web (1) between an engagement position (E) and a release position (F), the quality of the deposited material web remaining largely unaffected, because each engagement element (5, 6) has a contact section (7, 8), which can be brought into a contact position (K) in the engagement position (E) and into an idle position (L) in the release position (F), wherein the movement direction (C, D) of the contact section (7, 8) is oriented at a downward angle to the laying direction (A, B).

A folding device for placing an elastomer thin sleeve on a retainer includes a mandrel, one or more rollers, and a drive system. The mandrel is configured to translate relative to a portion of the folding device. The mandrel is adapted to releasably receive the retainer. The one or more rollers are configured to rotate relative to the mandrel. The rotation of the one or more rollers being configured to fold the sleeve onto the retainer. The drive system is configured to translate the mandrel and turn the one or more rollers.

A folding device for placing an elastomer thin sleeve on a retainer includes a mandrel, one or more rollers, and a drive system. The mandrel is configured to translate relative to a portion of the folding device. The mandrel is adapted to releasably receive the retainer. The one or more rollers are configured to rotate relative to the mandrel. The rotation of the one or more rollers being configured to fold the sleeve onto the retainer. The drive system is configured to translate the mandrel and turn the one or more rollers.