A machine for producing paper rolls includes a first and a second winding rollers rotatably mounted, respectively, about first and second axes; first and second pressure rollers rotate, respectively, about a third axis on a first movable arm, and about a fourth axis on a second movable arm. The rollers define a winding channel for a web of paper around a core, for forming a roll. The core moves by one or more of the rollers, between a position for winding and position for expelling the wound roll. The winding rollers are positioned, relative to the pressure rollers on opposite sides of the channel, relative to movement of the core The movable arms pivot, respectively, on first and second secondary axes such that the rotation of the first and/or the second movable arm moves the first and/or the second pressure roller from or towards the first and/or second winding roller.

A rewinding machine winds a web material into a log about a core. The web material to be wound is directed about a rotating winding drum. A continuous loop is spaced from the winding drum and with the winding drum defines a nip through which the core is inserted and through which the web material is directed. A surface of the continuous loop opposite the winding drum across the nip is configured to move in a direction generally opposite of the winding drum for winding the web material about the core. A rider roll defines a winding space with the winding drum and the continuous loop. The rider roll is movable relative to the continuous loop and the winding drum to allow for an increase in a diameter of the log in the winding space during winding of the web material about the core.

A rewinding machine winds a web material into a log about a core. The web material to be wound is directed about a rotating winding drum. A continuous loop is spaced from the winding drum and with the winding drum defines a nip through which the core is inserted and through which the web material is directed. A surface of the continuous loop opposite the winding drum across the nip is configured to move in a direction generally opposite of the winding drum for winding the web material about the core. A rider roll defines a winding space with the winding drum and the continuous loop. The rider roll is movable relative to the continuous loop and the winding drum to allow for an increase in a diameter of the log in the winding space during winding of the web material about the core.