A folding device is provided, The folding device includes a bearing and fixing mechanism (1) configured to bear and fix a main body portion (21) of a to-be-folded device (2); a folding mechanism (3) located on at least one side of the bearing and fixing mechanism (1), the folding mechanism (3) being rotatably connected to the bearing and fixing mechanism (1) and configured to bear and fix a to-be-folded portion (22) of the to-be-folded device (2); and a driving mechanism (4) connected to the folding mechanism (3), the driving mechanism (4) being configured to drive the folding mechanism (3) to turn relative to the bearing and fixing mechanism (1), so as to fold the to-be-folded portion (22) to a side in a thickness direction of the main body portion (21), The folding device can fold automatically, and manual folding is avoided.

A folding device is provided, The folding device includes a bearing and fixing mechanism (1) configured to bear and fix a main body portion (21) of a to-be-folded device (2); a folding mechanism (3) located on at least one side of the bearing and fixing mechanism (1), the folding mechanism (3) being rotatably connected to the bearing and fixing mechanism (1) and configured to bear and fix a to-be-folded portion (22) of the to-be-folded device (2); and a driving mechanism (4) connected to the folding mechanism (3), the driving mechanism (4) being configured to drive the folding mechanism (3) to turn relative to the bearing and fixing mechanism (1), so as to fold the to-be-folded portion (22) to a side in a thickness direction of the main body portion (21), The folding device can fold automatically, and manual folding is avoided.

A sheet folding device includes a folding rollers pair, a folding blade, a movable guide, and a driving mechanism. The folding rollers pair includes a first roller and a second roller, and causes a sheet conveyed in a first conveyance direction to pass through a first nip area between the rollers. The folding blade is selectively disposed in a folding position and in a retracting position. The movable guide can reciprocate between a covering position covering the second roller disposed downstream of the first roller in the first conveyance direction and the first nip area and a non-covering position exposing the second roller and the first nip area. The drive mechanism disposes the folding blade in the folding position while disposing the movable guide in the non-covering position, and disposes the folding blade in the retracting position while disposing the movable guide in the covering position.

A sheet folding device includes a folding rollers pair, a folding blade, a movable guide, and a driving mechanism. The folding rollers pair includes a first roller and a second roller, and causes a sheet conveyed in a first conveyance direction to pass through a first nip area between the rollers. The folding blade is selectively disposed in a folding position and in a retracting position. The movable guide can reciprocate between a covering position covering the second roller disposed downstream of the first roller in the first conveyance direction and the first nip area and a non-covering position exposing the second roller and the first nip area. The drive mechanism disposes the folding blade in the folding position while disposing the movable guide in the non-covering position, and disposes the folding blade in the retracting position while disposing the movable guide in the covering position.

A sheet folding apparatus includes a sheet folding unit disposed to fold a sheet and a conveyance unit disposed to feed the sheet to the sheet folding unit in a feed direction orthogonal to a fold direction of the sheet folding unit while correcting a skew of the sheet. The conveyance unit includes an elongated reference guide, a conveyance mechanism disposed to convey the sheet in the feed direction while exerting a force on the sheet toward the reference guide, an adjustment mechanism disposed to adjust an inclination of the reference guide with respect to the feed direction. The apparatus further includes an input unit through which a user inputs a folding misalignment amount of the sheet folded by the sheet folding unit. The inclination of the reference guide is corrected by the adjustment mechanism based on at least the folding misalignment amount inputted through the input unit.

A sheet folding apparatus includes a sheet folding unit disposed to fold a sheet and a conveyance unit disposed to feed the sheet to the sheet folding unit in a feed direction orthogonal to a fold direction of the sheet folding unit while correcting a skew of the sheet. The conveyance unit includes an elongated reference guide, a conveyance mechanism disposed to convey the sheet in the feed direction while exerting a force on the sheet toward the reference guide, an adjustment mechanism disposed to adjust an inclination of the reference guide with respect to the feed direction. The apparatus further includes an input unit through which a user inputs a folding misalignment amount of the sheet folded by the sheet folding unit. The inclination of the reference guide is corrected by the adjustment mechanism based on at least the folding misalignment amount inputted through the input unit.

A sheet folding device includes a folding rollers pair, a folding blade, a movable guide, and a driving mechanism. The folding rollers pair includes a first roller and a second roller, and causes a sheet conveyed in a first conveyance direction to pass through a first nip area between the rollers. The folding blade is selectively disposed in a folding position and in a retracting position. The movable guide can reciprocate between a covering position covering the second roller disposed downstream of the first roller in the first conveyance direction and the first nip area and a non-covering position exposing the second roller and the first nip area. The drive mechanism disposes the folding blade in the folding position while disposing the movable guide in the non-covering position, and disposes the folding blade in the retracting position while disposing the movable guide in the covering position.

A sheet folding device includes a folding rollers pair, a folding blade, a movable guide, and a driving mechanism. The folding rollers pair includes a first roller and a second roller, and causes a sheet conveyed in a first conveyance direction to pass through a first nip area between the rollers. The folding blade is selectively disposed in a folding position and in a retracting position. The movable guide can reciprocate between a covering position covering the second roller disposed downstream of the first roller in the first conveyance direction and the first nip area and a non-covering position exposing the second roller and the first nip area. The drive mechanism disposes the folding blade in the folding position while disposing the movable guide in the non-covering position, and disposes the folding blade in the retracting position while disposing the movable guide in the covering position.

A sheet processing apparatus includes a roller pair configured to convey a sheet, a sheet bundle conveyer configured to convey a sheet bundle to the roller pair, and circuitry configured to cause the sheet bundle conveyer to contact leading edges of sheets of the sheet bundle to the roller pair and cause the roller pair to rotate in reverse to align the leading edges of the sheets of the sheet bundle.

A roll (1) for folding, or interfolding, a web, or sheet, of paper, (100) fed along an advancing direction in a paper converting machine, or similar machines, comprises a tubular body (10) configured to rotate about a longitudinal rotation axis (101), and having an external lateral surface (11) and an internal lateral surface (12) pneumatically communicating through a plurality of suction holes (3a, 3b) organized in a predetermined number of suction groups (60). Each suction group (60) comprises a predetermined number of close longitudinal rows (30a, 30b) of suction holes (3a, 3b) distributed along the tubular body (10). A suction chamber (20) is, then, provided arranged internally to the roll (1) for folding, or interfolding, and pneumatically connected to a suction device generating a predetermined vacuum level. Each suction group (60) comprises at least 3 close longitudinal rows (30a, 30b, 30c) of suction holes (3a, 3b, 3c) configured to hold each sheet, or web, of paper (100) on the roll (1) at a respective portion of the external lateral surface (11).