A gluing device (10) for gluing an end edge (11) of a log (11) comprising, in succession, an introducing group (20) for introducing logs (11) into the gluing device (10), a handling group (30) for handling the log (11) associated with detection means for detecting the end edge (11) and comprising a pair of rollers (31, 32) selectively for advancing and for holding in rotation the log (11), a glue dispensing group (40) and a transferring group (50) for transferring the log (11) comprising a transferring plane (51) arranged downstream of the lower handling roller (32), between the lower handling roller (32) and the transferring plane (51) has a space (35) for the passage of the end edge (11), the glue dispensing group (40) being arranged below the transferring plane (51) and comprising a transversal row of glue dispensing nozzles (41) are selectively disinsertable and directed towards the lower handling roller (32), and it comprises a transversal alignment device (23) for aligning the log (11) arranged upstream of the glue dispensing group (40). A related method of gluing the end edge is also part of the invention.

A gluing device (10) for gluing an end edge (11) of a log (11) comprising, in succession, an introducing group (20) for introducing logs (11) into the gluing device (10), a handling group (30) for handling the log (11) associated with detection means for detecting the end edge (11) and comprising a pair of rollers (31, 32) selectively for advancing and for holding in rotation the log (11), a glue dispensing group (40) and a transferring group (50) for transferring the log (11) comprising a transferring plane (51) arranged downstream of the lower handling roller (32), between the lower handling roller (32) and the transferring plane (51) has a space (35) for the passage of the end edge (11), the glue dispensing group (40) being arranged below the transferring plane (51) and comprising a transversal row of glue dispensing nozzles (41) are selectively disinsertable and directed towards the lower handling roller (32), and it comprises a transversal alignment device (23) for aligning the log (11) arranged upstream of the glue dispensing group (40). A related method of gluing the end edge is also part of the invention.

A dunnage conversion system includes a machine for converting a stock material (14) into a strip of relatively lower-density dunnage, a coiling mechanism (20) for winding the strip into a coil, a taping mechanism (22) for automatically securing a trailing end of the strip to the coil, and a coil ejecting mechanism (24) for automatically removing the coil from the coiling mechanism. The taping mechanism includes a guide surface (70) between an outlet of the machine and the coiling mechanism to guide the strip to the coiling mechanism and to guide tape for engagement with a trailing end of the strip and to secure the trailing end of the strip to the coil. The coil ejecting mechanism includes a lever arm (126) that pivots to push the completed coil off the coiling mechanism.

A dunnage conversion system includes a machine for converting a stock material (14) into a strip of relatively lower-density dunnage, a coiling mechanism (20) for winding the strip into a coil, a taping mechanism (22) for automatically securing a trailing end of the strip to the coil, and a coil ejecting mechanism (24) for automatically removing the coil from the coiling mechanism. The taping mechanism includes a guide surface (70) between an outlet of the machine and the coiling mechanism to guide the strip to the coiling mechanism and to guide tape for engagement with a trailing end of the strip and to secure the trailing end of the strip to the coil. The coil ejecting mechanism includes a lever arm (126) that pivots to push the completed coil off the coiling mechanism.

A method of forming a gum roll is provided. The method includes providing a strip stock having a first end, a first surface, and a second surface opposite to the first surface. The first end of the strip stock is coupled to a core fixture so the first surface interfaces with the core fixture. The strip stock is rotated to wind the strip stock onto the core fixture such that the first surface interfaces with the second surface to form the gum roll. The method further includes cutting the strip stock to form the second end when the gum roll is wound to an outer roll diameter, the outer roll diameter being greater than a diameter of the core fixture.

A converting line for coreless roll products includes a rewinding machine and a controller. A log of convolutely wound web material is wound in the rewinding machine during a wind cycle. A diameter of the log, a caliper of the web material, and an amount of tension of the web is determined at a plurality of time points during a time period of the winding cycle. The controller is enabled to generate a signal to change an operating condition of the converting line based upon at least one of a diameter determination at a time point during the wind cycle, a caliper determination at a time point during the wind cycle, a wound web amount determination at a time point during the wind cycle, and a tension determination at a time point during the wind cycle.

A converting line for coreless roll products includes a rewinding machine and a controller. A log of convolutely wound web material is wound in the rewinding machine during a wind cycle. A diameter of the log, a caliper of the web material, and an amount of tension of the web is determined at a plurality of time points during a time period of the winding cycle. The controller is enabled to generate a signal to change an operating condition of the converting line based upon at least one of a diameter determination at a time point during the wind cycle, a caliper determination at a time point during the wind cycle, a wound web amount determination at a time point during the wind cycle, and a tension determination at a time point during the wind cycle.

Method for applying glue on tubular cores for the production of logs of paper material, comprising the step of supplying in sequence more tubular cores (1) along a predetermined advancing direction (A) and the step of applying on each of said cores (1) a predetermined amount of glue on a first point (P6) and on a second point (P7). The method further comprises a step of orienting the glue (G6) applied on the first point (P6) towards the second point (P7) and along said advancing direction (A), and orienting the glue (G7) applied on the second point (P7) towards the first point (P6) and along a direction opposite relative to said advancing direction (A).

Method for applying glue on tubular cores for the production of logs of paper material, comprising the step of supplying in sequence more tubular cores (1) along a predetermined advancing direction (A) and the step of applying on each of said cores (1) a predetermined amount of glue on a first point (P6) and on a second point (P7). The method further comprises a step of orienting the glue (G6) applied on the first point (P6) towards the second point (P7) and along said advancing direction (A), and orienting the glue (G7) applied on the second point (P7) towards the first point (P6) and along a direction opposite relative to said advancing direction (A).

A wrapping material roll includes a flexible sheet having a length and a width. The sheet is rolled concentrically about an axis parallel to the direction of the width such that a longitudinal end of the sheet is located along a circumferential side of the wrapping material roll. At least a part of the longitudinal end is folded along a folding line over at least part of the width.