Method for producing cardboard tubes by winding a plurality of ribbons (U, L) onto a spindle (1), a preset number of the ribbons (U, L) being glued in correspondence of the lower or radial inner surface thereof, characterized in that a predetermined amount of supplementary quick setting glue is applied on the lower surface of the last ribbon (U) destined to be wound on the spindle (1), in proximity to at least a longitudinal edge (BU) of the ribbon (U) forming a corresponding stripe of quick setting glue (G) astride of a section (ST) of the same ribbon interested or intersected by a subsequent cutting action executed downstream of the spindle (1).

Method for producing cardboard tubes by winding a plurality of ribbons (U, L) onto a spindle (1), a preset number of the ribbons (U, L) being glued in correspondence of the lower or radial inner surface thereof, characterized in that a predetermined amount of supplementary quick setting glue is applied on the lower surface of the last ribbon (U) destined to be wound on the spindle (1), in proximity to at least a longitudinal edge (BU) of the ribbon (U) forming a corresponding stripe of quick setting glue (G) astride of a section (ST) of the same ribbon interested or intersected by a subsequent cutting action executed downstream of the spindle (1).

A paper straw for drinks is revealed. The paper straw includes a base material formed by a paper strip made from calcium carbonate. The base material is wound around an axis of a roller shaft obliquely and overlapped to form a hollow spiral tube whose two ends are communicated. Overlapped portions one over the other on the base material of the spiral tube are tightly connected. The paper straw that is environmentally sustainable, degradable and convenient to use can replace the plastic straw. The paper straw has premium quality and high performance.

A paper straw for drinks is revealed. The paper straw includes a base material formed by a paper strip made from calcium carbonate. The base material is wound around an axis of a roller shaft obliquely and overlapped to form a hollow spiral tube whose two ends are communicated. Overlapped portions one over the other on the base material of the spiral tube are tightly connected. The paper straw that is environmentally sustainable, degradable and convenient to use can replace the plastic straw. The paper straw has premium quality and high performance.

A can containing a solid, liquid and/or a gaseous medium which can have excess pressure or can develop such during transport or storage. The cylindrical can shell of the can includes paper or cardboard material and at least two wound layers, and is closed at the bottom with a bottom element and at the top with a cover element. The innermost layer of the can shell consisting of a straight-wound barrier layer, which includes a longitudinal seam that runs in the longitudinal direction of the can and is sealed inwards by a film layer, which overlaps the barrier layer near the longitudinal seam, or the longitudinal seam is sealed by a sealing strip running straight in the longitudinal direction or the longitudinal seam forms an increase in thickness and the longitudinal edge of a further layer faces a flank of the increase in thickness.

A can containing a solid, liquid and/or a gaseous medium which can have excess pressure or can develop such during transport or storage. The cylindrical can shell of the can includes paper or cardboard material and at least two wound layers, and is closed at the bottom with a bottom element and at the top with a cover element. The innermost layer of the can shell consisting of a straight-wound barrier layer, which includes a longitudinal seam that runs in the longitudinal direction of the can and is sealed inwards by a film layer, which overlaps the barrier layer near the longitudinal seam, or the longitudinal seam is sealed by a sealing strip running straight in the longitudinal direction or the longitudinal seam forms an increase in thickness and the longitudinal edge of a further layer faces a flank of the increase in thickness.

Method for producing cardboard tubes by winding a plurality of ribbons (U, L) onto a spindle (1), a preset number of the ribbons (U, L) being glued in correspondence of the lower or radial inner surface thereof, characterized in that a predetermined amount of supplementary quick setting glue is applied on the lower surface of the last ribbon (U) destined to be wound on the spindle (1), in proximity to at least a longitudinal edge (BU) of the ribbon (U) forming a corresponding stripe of quick setting glue (G) astride of a section (ST) of the same ribbon interested or intersected by a subsequent cutting action executed downstream of the spindle (1).

Method for producing cardboard tubes by winding a plurality of ribbons (U, L) onto a spindle (1), a preset number of the ribbons (U, L) being glued in correspondence of the lower or radial inner surface thereof, characterized in that a predetermined amount of supplementary quick setting glue is applied on the lower surface of the last ribbon (U) destined to be wound on the spindle (1), in proximity to at least a longitudinal edge (BU) of the ribbon (U) forming a corresponding stripe of quick setting glue (G) astride of a section (ST) of the same ribbon interested or intersected by a subsequent cutting action executed downstream of the spindle (1).

A wound package construct includes a first wound strip of package material that establishes an inner liner layer, a second wound strip of material that establishes an intermediate bodystock layer, and a third wound strip of material or cover strip that covers a seam formed by the wound bodystock layer but that does not cover all of the outer surface area of the wound bodystock layer. Therefore, the width of the cover strip is less than the width of the bodystock strip. As a result, the cover strip is not wide enough to cover the entire outer surface of the wound bodystock layer such that, after the cover strip is wrapped to cover the spiral bodystock seam, areas of the bodystock layer remain exposed between the two opposed length-wise edges of the cover strip.

A wound package construct includes a first wound strip of package material that establishes an inner liner layer, a second wound strip of material that establishes an intermediate bodystock layer, and a third wound strip of material or cover strip that covers a seam formed by the wound bodystock layer but that does not cover all of the outer surface area of the wound bodystock layer. Therefore, the width of the cover strip is less than the width of the bodystock strip. As a result, the cover strip is not wide enough to cover the entire outer surface of the wound bodystock layer such that, after the cover strip is wrapped to cover the spiral bodystock seam, areas of the bodystock layer remain exposed between the two opposed length-wise edges of the cover strip.