Abstract: In the method in unwinding, paper web (W) is discharged from a reel (R1) that is becoming empty and the paper web of a new full reel (R2) is spliced at the discharge speed to the paper web discharged from the reel that is becoming empty. The terminal end point (L) of the web of the reel (R1) that is becoming empty is stored as information indicating its position in the longitudinal direction of the web in a readable memory (M) corresponding to the reel. During the discharge the distance travelled by the web is determined and compared to the memory, and when there is a predetermined length of web to the terminal end point (L) remaining on the reel (R1) that is becoming empty, a splicing command is given, whereafter the leading end of the paper web of a new full reel (R2) is spliced to the paper web (W) being discharged.

Abstract: A device for joining the trailing edge of a reel of paper about to finish to the leading edge of a new reel comprising, on a supporting structure (11), a support (12) for the reel as it unwinds (13), a device (15) for transferring the reel (13) to a unit for tensioning the trailing edge (17) of the reel (13′) about to finish, a cutting unit (32) of the trailing edge (17), at least one roller (43) that presses the trailing edge (17) on the new reel (13) once it has been positioned on the support (12) and provided with a double-sided tape (48) positioned crosswise on a lateral surface of the same in order to retain its leading edge (49).

Abstract: A flying web splice apparatus and method for splicing a moving web of material to another web of material without tape or adhesives being used at the splice. Two splicer assemblies are provided which each have a rotatable parent roll feeding web material into the splicer apparatus. Each splicer assembly has a series of substantially parallel vacuum belts and a series of vacuum boxes therein. The vacuum boxes for each splicer assembly are evacuated by a vacuum blower, which creates a vacuum causing a suction through holes within a portion of the vacuum belts in order to hold web material to the vacuum belts. The series of belts for each splicer assembly are preferably rotatable about a top pivot to bring a bottom portion of each series of belts together.

Abstract: In a flying splice roll changer a splice tail occurs at the splice joint that may induce problems in a downstream processing station. The present invention is directed to shortening of the splice tail (2) by directing the paper web (1) around a deflection roller (3) so that the splice tail (2) is located on the outer face of the roller and extends radially under the action of centrifugal force while being optionally supported by air ejected from blowing nozzles (8, 9). The splice tail is then cut with a blade (7) located in the vicinity of the outer surface of the deflection roller (3) so that only an insignificant length of a few millimeters remains.

Abstract: In the manufacture of plastics bags using reclosable zipper strip (10, 14) with engageable male and female profiles (12, 16), a butt splicing operation is used to speed up the changeover from one reel of zipper strip to another. The trailing end of one strip and the leading end of the next strip are brought together in abutting relationship within a splicing unit, sealing material (22) is overlaid on the end zones of opposite sides of the strips, and this is sealed to the underlying zipper strips, preferably using heat and pressure. The flanges (18) of the zipper strips are held apart by separator plates (20) during the sealing operation.

Abstract: Splicing tape for splicing a leading edge portion of a roll of sheet material to a further sheet comprising a carrier layer having on a first major surface a first adhesive layer and on a second major surface opposite to the first major surface in the order given a non-tacky polymer layer and a second adhesive layer. The splicing tape being capable of delamination between the carrier layer and the non-tacky polymer layer when preparing the splice.

Abstract: A splicing tape for splicing a leading edge portion of the outer turn of a roll of sheet material to a second sheet material. A typical application is to join the outer turn of a replacement roll of paper to the end of depleted roll of paper while the paper remains in motion through some handling apparatus. The splicing tape comprises a first tape component, and second tape component, and a layer of adhesive separably joining the first and second tape components. The first tape component includes a first backing, a first layer of adhesive on a first surface of the first backing, and a first barrier layer on a second surface of the first backing. The second tape component includes a second backing, a second layer of adhesive on a first surface of the second backing, and a second barrier layer on a second surface of the second backing. Alternatively, the splicing tape may include only one barrier layer between the joining adhesive layer and one of the first and second backings.

Abstract: An unwinding station continuously unwinds a material web, notably a paper or cardboard web, for a machine, specifically a coater, for conversion of the material web. The station includes a primary unwinding system, a secondary unwinding system and a splicing system to splice together material webs unwinding from two reels, with each reel being carried by one of the unwinding systems. The reel carried by the primary unwinding system, which is disposed after the splicing of the material webs to one another, is transferable by use of a carrying system to the secondary unwinding system. The unwinding station is distinguished specifically by an auxiliary drive that is movable jointly with the reel and which can be driven with the aid of the reel.

Abstract: A wall is provided on one side of a web of paper or the like traveling along a predefined path, and an airstream is produced between the wall and the traveling web approximately in the direction of web travel. A transverse static pressure gradient is established across the airstream, causing the stream to flow close to the wall surface. This phenomenon is called as the Coanda effect. A partial vacuum created in the airstream causes the web to deflect from its normal path and to be drawn to the wall surface under sufficient pressure to be kept from fluttering. This method of web flutter control is applied to the splicing of webs, as from one roll to another in a web-fed rotary printing press. The web being unwound from the old roll has been susceptible to fluttering while being spliced to the new roll, such web fluttering being eliminable by providing a wall member along the web path and producing an airstream between the web and the wall member.

Abstract: A process for in-line lamination of a non-oven fibrous sheet to an extruded polymer film. A non-oven fibrous sheet is slit into a plurality of narrow non-oven fibrous webs. The narrow non-oven fibrous webs are spaced by turning the webs around a plurality of spaced webs. An extruded polymer film is laminated onto a surface of the spaced webs to provide a laminate of the extruded polymer film and the spaced narrow webs having a portion of the extruded polymer film between the spaced non-woven fibrous webs.