Abstract: The accumulator includes at least one pair of chains substantially parallel to each other to which cradles are connected for receiving products to be stored, the cradles being mutually spaced along the pair of chains. Each cradle is connected to the pair of chains through constraining members. On each chain at least one intermediate constraining member is arranged between two adjacent cradles connected to the chains.

Abstract: The machine includes a forming spindle around which one or more strips of web material are wound; a winding unit to wind the strips of web material around the forming spindle and form therewith a tubular article; and a cutting unit to cut the tubular article into single tubes. The machine also includes at least one magnetic device to support the forming spindle to reduce the flexural deformations thereof.

Abstract: The machine includes a spindle; a winding unit, cooperating with the spindle to wind one or more strips of web material about the spindle and form a tubular element; and a cutting unit with at least one discoidal cutting tool to divide the tubular element into tubes of a length which can be predetermined. At least one pressure element is associated with the cutting tool to compress the tubular element between the spindle and the pressure element adjacent to the cut performed by the cutting tool.

Abstract: The accumulator includes at least one pair of chains substantially parallel to each other to which cradles are connected for receiving products to be stored, the cradles being mutually spaced along the pair of chains. Each cradle is connected to the pair of chains through constraining members. On each chain at least one intermediate constraining member is arranged between two adjacent cradles connected to the chains.

Abstract: A storage unit for tubular winding cores is described, which includes an entrance, an exit and an accumulation area between the entrance and the exit. In the accumulation area, a feeding path is provided for the tubular winding cores, formed by feeding channels overlapping and connected by descending branches arranged for falling due to gravity from one feeding channel to another feeding channel therebelow. The tubular winding cores gather along the feeding path, arranging themselves in contact one with another.

Abstract: The machine for producing tubes includes a winding spindle around which strips of weblike material are wound to form the tube, which is made to advance along the spindle; a device for supply and winding of the strips around the spindle, and at least one knife for cutting lengths of the tube being formed. The knife is provided with a reciprocating movement parallel to the spindle. There is moreover envisaged a counter-knife within the tube being formed, provided with a movement of translation synchronized to the movement of translation of the knife. The counter-knife is magnetically constrained to a mover member, which transmits the motion to the counter-knife.

Abstract: The machine for producing tubes includes a winding spindle, around which strips of weblike material are wound to form the tube, which is made to advance along the spindle; a device for supply and winding of the strips around the spindle, and at least one knife for cutting lengths of the tube being formed. The knife is provided with a reciprocating movement parallel to the spindle. There is moreover envisaged a counter-knife within the tube being formed, provided with a movement of translation synchronized to the movement of translation of the knife. The counter-knife is magnetically constrained to a mover member, which transmits the motion to the counter-knife.

Abstract: The machine includes a spindle; a winding unit, cooperating with the spindle to wind one or more strips of web material about the spindle and form a tubular element; and a cutting unit with at least one discoidal cutting tool to divide the tubular element into tubes of a length which can be predetermined. At least one pressure element is associated with the cutting tool to compress the tubular element between the spindle and the pressure element adjacent to the cut performed by the cutting tool.

Abstract: The machine includes a forming spindle around which one or more strips of web material are wound; a winding unit to wind the strips of web material around the forming spindle and form therewith a tubular article; and a cutting unit to cut the tubular article into single tubes. The machine also includes at least one magnetic device to support the forming spindle to reduce the flexural deformations thereof.

Abstract: The invention relates to a machine for producing tubular articles (T) by helical winding of strips of web material, comprising a spindle (4) and a winding member (7) to helically wind the strips (S1, S2) of web material around the spindle. To improve adhesion between strips pressure is applied to the overlapping turns of strips of web material by an ultrasonic generator (33).