Rewinding machine for coreless winding of a log of web material with a surface for supporting the log in the process of winding
AssigneeFabio Perini S.p.A.
InventorGuglielmo Biagiotti
Life of this patent
Estimating the term…
Abstract
A rewinding machine for the production of logs (R) of web material (N) without a core comprises: a first winding roller (1) onto which the web material is fed; a second winding roller (3) rotating in the same direction as the first roller and forming a nip (4) therewith through which the web material passes; an actuator and element (15, 17) to move the surface of the second winding roller (3) toward the first winding roller (1); and a separator to sever the web material at the end of the winding thereof to form a log (R). Provision is also made for a surface (21, 21A) supporting the log (R2) in the process of formation and located upstream of the nip (4) between the rollers (1, 3).
Claims8
A rewinding machine for the production of logs (R) of web material without winding core or winding mandrel including:
- a first winding roller (1) onto which the continuous web material is fed from an upstream to a downstream direction;
- a second winding roller (3), rotating in the same direction as the first winding roller and forming a nip (4) therebetween through which the web material (N) to be wound passes in an upstream to downstream direction;
- means to sever said web material at the end of the winding of a log (R1) and forming a web leading edge,
- means (15, 17) to move the surfaces of said winding rollers close to one another, the web material being pinched between said winding rollers to start winding of the leading edge upon itself;
- a support surface (21, 21A) located upstream of the nip (4) between said rollers (1, 3), the winding of said log starting with said log being arranged in said nip and in contact with said first and second winding rollers (1, 3) and said support surface (21, 21A), and arranged to align the initial winding of the log between the first and second winding rollers.
A method of winding a web material (N) to form coreless logs, including the steps of:
- a) providing a first winding roller which carries the web material (N);
- b) providing a second winding roller, defining a nip with the first winding roller through which the web material is fed, said winding rollers rotating in the same direction;
- c) moving said web from an upstream to a downstream location through said nip;
- d) forming a coreless log of said web material;
- e) severing the web material at the end of the winding of a log thereby generating a leading edge of said web for the winding of a subsequent log;
- f) moving the winding rollers close to each other to grip the web material, near its edge, therebetween, causing the latter to curl upon itself and thus starting the winding of a new log of said web material;
- g) retaining the log during the initial winding between said first and said second winding rollers, by supporting said log on a support surface located upstream of said nip with respect to the web feeding direction whereby to align the initial winding of the log between the first and second winding rollers.
Dependencies are inferred from the claim text.