Provided are a sheet supply device and a sheet supply method capable of keeping the precision of a sheet separating operation constant regardless of differences in diameter dimensions of rolls. A second guide roller is disposed at an opposite side of a standby side roll with respect to a tangential line to the outer peripheral surface of the standby side roll at a pressing position in a state in which the pressing roller is pressed against the pressing position, and guides a sheet such that the sheet is guided from the pressing roller in a direction away from the standby side roll. Furthermore, the second guide roller is fixed to a moving unit so as to be configured to approach and move away from the standby side roll together with the pressing roller.

A high-speed digital printing system includes two unwinding machines for two input coils for a paper web, an input unwinding and splicing installation and a printing station and in which the input installation supplies, in turn, the printing station with the web of the two coils. The system also includes a splicing and rewinding installation with an output cutting and splicing equipment for an incoming web emerging from the printing station and two rewinding machines with two output coils. The output equipment feeds alternatively the rewinding machines with the incoming web by cutting and splicing of a web of the two output coils without stopping printing. An electronic controller switches the functionality of the output cutting and splicing equipment and of the rewinding machines with setting of the output coils as an operating coil and a waiting coil and, viceversa, as a waiting coil and an operating coil.

Adhesive tape for flying splices of flat web materials, in particular flat web materials with nonpolar surfaces, said adhesive tape at least comprising an upper self-adhesive compound layer, an inner adhesive tape area adapted as a flat predetermined breaking point, and a lower self-adhesive compound on the underside of the inner adhesive tape area, wherein a natural rubber adhesive compound is used as the self-adhesive compound for at least the upper self-adhesive compound layer, as well as methods for flying splices of flat web material wound onto rolls, in particular with nonpolar surfaces, using a corresponding adhesive tape.

The apparatus and method for splicing substantially flat continuous material comprises a transport unit for transporting a first substantially flat continuous material and a second substantially flat continuous material to a splicing location. The transport unit is adapted to transport the first substantially flat continuous material and the second substantially flat continuous material parallel to each other forming an overlap portion of the first substantially flat continuous material and the second substantially flat continuous material in the splicing location. A pressure unit is arranged in the splicing location. The pressure unit is adapted to apply a mechanical impact onto at least a part of the overlap portion of the first substantially flat continuous material and the second substantially flat continuous material, thereby at least partially merging the first substantially flat continuous material with the second substantially flat continuous material.

Provided is a sheet supply device capable of reliably joining sheets by accurately transmitting force for joining the sheets. A joining mechanism includes a pressing roller that presses a sheet of a supply side roll against the outer peripheral surface of a standby side roll; and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the standby side roll supported by a support shaft disposed at a splice position in the radial direction of the standby side roll. The moving unit supports the pressing roller such that the center of the pressing roller is movable on a straight line passing through the center of a rotation shaft and the center of the support shaft disposed at the splice position.

A controller includes: an adhesion member position determination unit that determines a position of an adhesion member in a rotation direction of a roll on the basis of the result of detection from an adhesion member detector in a state in which the roll has been rotated by a shaft control unit; and an outer diameter determination unit that determines an outer diameter of the roll in a portion where the adhesion member is positioned, the determination being performed on the basis of the result of detection from an outer diameter detector in a state in which driving of shaft drive sources are controlled by the shaft control unit such that the adhesion member is positioned within a detection range of the outer diameter detector on the basis of the position of the adhesion member determined by the adhesion member position determination unit.

There is described a web alignment device for aligning a web comprising an engagement surface for supporting the web, a clamp assembly for clamping the web on at least a clamp portion of the engagement surface, an alignment control assembly for controlling a correct alignment of the web. The alignment control assembly comprises a control unit for generating a trigger signal if the web is correctly aligned, a first sensor device for detecting and/or determining a desired position of a first section of the web and to send at least a first signal to the control unit if the first section is positioned in the desired position, and a second sensor device for detecting and/or determining a desired position of a second section of the web and to send a second signal to the control unit if the second section is positioned in the desired position.

The apparatus and method for splicing substantially flat continuous material (10) comprises a transport unit (1) for transporting a first substantially flat continuous material (70) and a second substantially flat continuous material (71) to a splicing location. The transport unit is adapted to transport the first substantially flat continuous material and the second substantially flat continuous material parallel to each other forming an overlap portion of the first substantially flat continuous material and the second substantially flat continuous material in the splicing location. A pressure unit (3) is arranged in the splicing location. The pressure unit is adapted to apply a mechanical impact onto at least a part of the overlap portion of the first substantially flat continuous material and the second substantially flat continuous material, thereby at least partially merging the first substantially flat continuous material with the second substantially flat continuous material.

Disclosed is a feedstock device (1) to deliver film (2) to a bundle-wrapping machine and including, on the one hand, at least one reel (3) to receive a roll (4) of the film (2) to be delivered, and, on the other hand, a joining unit (5) to attach the next film (2) to the film (2) that is currently being fed. This device includes a support (6) on which the at least one reel (3) is mounted, with the support (6) being mobile in relation to the joining unit (5) to bring the delivered film (2) to the latter. The invention also has as its object a machine and a corresponding method.

A splicing assembly for rolled sheet material, including first and second shafts for support of sheet material and a drive assembly for selectively dispensing sheet material. The assembly further includes a splicing apparatus for uniting a replacement with a winding down roll, and an egress guide assembly for receipt of dispensed sheet material exiting the splicing apparatus and passage of same intermediate the shafts. The splicing apparatus includes first and second sealing elements, and first and second carriages adapted and disposed for translation towards their respective sealing elements, a free end portion of sheet material of the replacement roll supported upon the first/second shaft for selective retention by the second/first sheet material carriage, and for translation to, and thereafter with, a portion of sheet material of the winding down roll supported upon the second/first shaft for urged combined engagement with a corresponding sealing element.