A sheet supply device and a sheet supply method include a guide roller disposed at an opposite side of a standby side roll with respect to a tangential line to an outer peripheral surface of the standby side roll at a pressing position in a state in which a pressing roller is pressed against a pressing position, and configured to guide a sheet 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 first shaft control section is configured to control rotation of a first support shaft supporting a first roll such that a sheet is unwound from the first roll at a predetermined running speed. A second shaft control section is configured to execute a first rotation control of regulating a rotational speed of a second support shaft supporting a second roll such that a peripheral speed of the second roll coincides with the predetermined running speed of the sheet of the first roll. The second shaft control section is configured to regulate the rotational speed of the second support shaft by acceleration or deceleration such that an adhesive on an outer peripheral surface of the second roll arrives at a pressing position when a target joining portion of the sheet of the first roll meets the pressing 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.

A device (1) for delivery of film for a station for packaging by plastic-wrapping, includes: at least two reels (2), each including at least one support shaft (3) for a film roll as well as a film guide (4), in particular in the form of a roller downstream from the shaft; a return roller (5), up to which an unwound film (6) travels from the roll of one of the reels (2); a loader for bringing the reserve film (9) from the roll of the at least one other reel (2) close to the unwound film. The loader includes a rotor (10), which rolls up the reserve film (9) around it in such a way as to bring it close to the unwound film (6). A machine that uses this device as well as a corresponding method are also described.

A first shaft control section controls rotation of a first support shaft supporting a first roll so that a sheet is unwound from the first roll at a predetermined running speed. A second shaft control section executes a first rotation control of regulating a rotational speed of a second support shaft supporting a second roll so that a peripheral speed of the second roll coincides with the running speed of the sheet of the first roll. Furthermore, the second shaft control section regulates the rotational speed of the second support shaft by way of acceleration or deceleration so that an adhesive on the outer peripheral surface of the second roll arrives at a pressing position when a target joining portion of the sheet of the first roll meets the pressing position.

A method for automatically replacing reels in an unwinding assembly capable of carrying out the handling operations of the reels, as well as preparing and joining the tail of the web of the finished reel with the head of the web of the new reel in a simple, efficient way, reducing the risk of malfunctions and maintaining the correct orientation of the new web as that of the finished web.

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 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.

An unwinding assembly comprising first and second unwinding and handling units comprising respective robots having respective wrists movable under the control of at least one electronic control unit, wherein each of said unwinding and handling units comprises a respective unwinding device mounted on the wrist of the respective robot. The present invention also relates to an unwinding and handling unit capable of handling the reel carried by it with high freedom of movement, while maintaining small dimensions.

The invention relates to a splicer assembly for splicing material webs. The splicer assembly comprises a first dispensing device for dispensing a finite first material web, a second dispensing device for dispensing a finite second material web, a connecting device for connecting the finite first material web and the finite second material web so as to form an endless material web, and a material web threading assistance assembly for assisted threading of the finite first material web or of the finite second material web into the splicer assembly in a threading procedure. The material web threading assistance device comprises at least one conveying installation for conveying the finite material web to be threaded in a threading direction in the threading procedure, and a conveying installation drive installation for driving the at least one conveying installation in the threading procedure.