Surface winder

Patent metadata

Field	Value
Publication number	US-9809417-B2
Application number	US-201514826594-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Aug 14, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A rewinding machine for convolutley winding a web material onto a core to is disclosed. The rewinding machine comprises a first winding drum rotatable at a first peripheral velocity, a second winding drum opposed to the first winding drum and rotatable at a second peripheral velocity, and a core support for gripping opposing ends of the core. The core support grips opposing ends of the core during winding of the web material about the core. The core support has first and second rotatable pins each having corresponding first and second ends capable of insertion into a respective end of the core. The first rotatable pin has a channel that provides fluid communication between a source of positive pressure disposed external to the first rotatable pin and the second end of the first rotatable pin to provide positive pressure to the interior portion of the core.

First claim

What is claimed is:

1. A rewinding machine for convolutley winding a web material onto a core to form rolls of convolutley wound web material, said rewinding machine comprising:
a first winding drum rotatable at a first peripheral velocity;
a second winding drum located in opposition to said first winding drum and rotatable at a second peripheral velocity, said core traversing a path extending through a space defined between said first and second winding drums;
said first and second winding drums causing said core to rotate in order to convolutley wind said web material thereabout to form said rolls of convolutley wound web material;
a core support for gripping opposing ends of said core in said space and during winding of said web material about said core, said core support moving said core along said path between said first and second winding drums in which said web material is wound about said core;
said core support further comprising a first rotatable pin having a corresponding first end and a corresponding second end capable of insertion into a first end of said core and a second rotatable pin having a corresponding first end and a corresponding second end capable of insertion into a second end of said core disposed distal to said first end of said core, said first and second rotatable pins both further comprising retaining means disposed upon said corresponding second end and being capable of providing fluidly sealing engagement with a respective interior portion of said core, said first rotatable pin further comprising a channel disposed therein, said channel providing fluid communication between a source of positive pressure disposed external to said first rotatable pin and said second end of said first rotatable pin, said source of positive pressure providing a positive pressure to said interior portion of said core through said channel from said first end of said first rotatable pin to said second end of said first rotatable pin when said second ends of both said first and second rotatable pins are in fluid sealing engagement with said interior portion of said core.

2. The rewinding machine of claim 1 further comprising a supply for supplying the web material at a predefined supply speed, said first peripheral velocity of said first winding drum substantially corresponding to said predefined supply speed.

3. The rewinding machine of claim 1 further comprising a roll for influencing said core and said web material convolutely wound thereabout to bear against and remain in contact with said first and second winding drums.

4. The rewinding machine of claim 1 wherein each of said first and second rotatable pins is cooperatively associated with a respective sliding block, each of said sliding blocks facilitating slidable movement of said respective first and second rotatable pins therethrough.

5. The rewinding machine of claim 1 wherein said first winding drum is controllable so said first peripheral velocity substantially corresponds to, greater than, or less than a supply speed of said web material.

6. The rewinding machine of claim 1 wherein said space defined between said first and second winding drums substantially corresponds to a transverse size of said core.

7. The rewinding machine of claim 1 wherein said first and second rotatable pins are opposing pins that can each be operatively associated with opposing ends of said core.

8. The rewinding machine according to claim 1 , wherein said path starts from a first position wherein said core support contactingly engages said core and terminates in a release position wherein said core support disengages from each of said rolls of convolutley wound web material.

9. The rewinding machine according to claim 1 wherein said core is a tubular core.

10. The rewinding machine according to claim 1 wherein said second end of each of said pins is frustoconical.

11. The rewinding machine according to claim 1 wherein said first and second rotatable pins each further comprise retaining means, said retaining means providing contacting and retaining engagement with said interior portion of said core.

12. The rewinding machine according to claim 1 wherein said first and second rotatable pins are independently rotatable.

13. The rewinding machine according to claim 1 wherein said path is linear.

14. A rewinding machine for winding a web material onto a core to form rolls, said rewinding machine comprising:
a web supply path;
along said web supply path, a first winding drum rotatable at a first peripheral velocity substantially corresponding to a web supply speed, at which said web is supplied along said web supply path, said web being fed in contact with and around said first winding drum;
a second winding drum located in opposition to said first winding drum and rotatable at a second peripheral velocity, said core traversing a path extending through a space defined between said first and second winding drums, said space having opposite inlet side and outlet side, said web supply path extending through said space from said inlet side to said outlet side;
said first and second winding drums causing said core to rotate in order to convolutley wind said web material thereabout to form said rolls of convolutley wound web material while said core is disposed within said space;
a core support for gripping opposing ends of said core in said space and during winding of said web material about said core, said core support moving said core along said path between said first and second winding drums in which said web material is wound about said core;
said core support further comprising a first rotatable pin having a corresponding first end and a corresponding second end capable of insertion into a first end of said core and a second rotatable pin having a corresponding first end and a corresponding second end capable of insertion into a second end of said core disposed distal to said first end of said core, said first and second rotatable pins both further comprising retaining means disposed upon said corresponding second end and being capable of providing fluidly sealing engagement with a respective interior portion of said core, said first rotatable pin further comprising a channel disposed therein, said channel providing fluid communication between a source of positive pressure disposed external to said first rotatable pin and said second end of said first rotatable pin, said source of positive pressure providing a positive pressure to said interior portion of said core through said channel from said first end of said first rotatable pin to said second end of said first rotatable pin when said second ends of both said first and second rotatable pins are in fluid sealing engagement with said interior portion of said core.

15. The rewinding machine of claim 14 further comprising a roll for influencing said core and said web material convolutely wound thereabout to bear against and remain in contact with said first and second winding drums.

16. The rewinding machine according to claim 14 wherein said first and second rotatable pins each further comprise retaining means, said retaining means providing contacting engagement with said interior portion of said core.

Assignees

• Procter & Gamble

Inventors

• Mellin Gustav André

Classifications

• B65H18/028

  Both ends type · CPC title

• B65H19/2269

  Cradle · CPC title

• B65H2515/342

  Operations & Transport · mapped topic

• B65H18/20

  the web roll being supported on two parallel rollers at least one of which is driven · CPC title

• B65H18/26

  Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers · CPC title