Folding device

• US 6,238,328 B1
• Filed: 10/25/1999
• Issued: 05/29/2001
• Est. Priority Date: 05/14/1997
• Status: Expired due to Fees

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Traugott, David K., Keating, Brian E., Loppnow, Jay
• Primary Examiner(s): KIM, EUGENE LEE
• Application Number:
  US09/426,377
• Time in Patent Office: 582 Days
• Field of Search: 493/374, 493/379, 493/440, 493/443, 221/47, 221/48
• US Class Current: 493/440
• CPC Class Codes: A47K 2010/428 Details of the folds or interfolds of the sheets
• CPC Class Codes: B65H 45/24 Interfolding sheets, e.g. cigarette or toilet papers
• CPC Class Codes: Y10T 428/24231 At opposed marginal edges
• CPC Class Codes: Y10T 428/24264 Particular fold structure [e.g., beveled, etc.]

Abstract

A sheet material assembly comprising a stack of longitudinally folded sheet material webs including a first web and second web. The first web includes a first fold, a second fold overlying a portion of said first fold, and a third fold lying between the first and second folds. The second web includes a first fold underlying the first fold of the first web, a second fold overlying the second fold of the first web and a third fold underlying the third fold of the first web. A folding device for forming a web includes a first, second and third folding edge extending from a first junction and formed in a first plane, a fourth folding edge extending from the first junction out of the first plane, a fifth and sixth folding edge extending from a second junction formed in a second plane parallel to and above the first plane, and a seventh folding edge extending from the second junction out of the second plane. The fifth folding edge crosses over the third folding edge in a spaced apart relationship. A method for forming a sheet material web includes drawing the web over the second, third and fourth folding edges to form the first fold, drawing the web over the first folding edge to form a second fold and drawing the web over the fifth, sixth and seventh folding edge to form the third fold.

Claims

1. A folding device for folding a web of sheet material comprising first, second and third folding edges extending from a first junction and formed in a first plane, said third folding edge extending from said first junction between said first and second folding edges, a fourth folding edge extending from said first junction and out of said first plane, whereby a first longitudinal fold of the web may be drawn over and formed by said second, third and fourth folding edges, and a second longitudinal fold of said web may be drawn over and formed by said first folding edge in an overlying relationship with said first fold, a fifth and sixth folding edge extending from a second junction formed adjacent an end of said first folding edge opposite said first junction, said fifth and sixth folding edges formed in a second plane parallel to and above said first plane, said fifth folding edge crossing over said third folding edge in a spaced apart relationship, a seventh folding edge extending from said second junction and out of said second plane, whereby a third longitudinal fold of said web may be drawn over and formed by said fifth, sixth and seventh folding edges in an overlying relationship with said first fold and in an underlying relationship with said second fold.

2. The folding device of claim 1 wherein said first, fourth and seventh folding edges form edges of a panel.

3. The folding device of claim 1 wherein said fifth and sixth folding edges form edges of a panel.

4. The folding device of claim 1 wherein said second and third folding edges form edges of a panel.

5. The folding device of claim 1 wherein said first, fourth and seventh folding edges form edges of a first panel, said second and third folding edges form edges of a second panel, and said fifth and sixth folding edges form edges of a third panel.

6. The folding device of claim 5 wherein said first, second and third panels are formed out of a single piece of material.

7. The folding device of claim 5 further comprising a fourth panel interconnecting said first and second panels, and a fifth panel interconnecting said first and third panels.

21. The folding device of claim 1 wherein said first folding edge comprises a curved lip portion.

8. A folding device for folding a sheet material web comprising a first panel comprising a first, fourth and seventh folding edge, a second panel comprising a second and third folding edge and a third panel comprising a fifth and sixth folding edge, said second and third panels in parallel and spaced apart relationship wherein a portion of said third panel overlies said second panel;

whereby a first longitudinal fold of the web may be drawn over and formed by said fourth folding edge of said first panel and said second and third folding edges of said second panel, and a second longitudinal fold of said web may be drawn over and formed by said first folding edge of said first panel in an overlying relationship with said first fold, and a third longitudinal fold of said web may be drawn over and formed by said seventh folding edge of said first panel and said fifth and sixth folding edge of said third panel in an underlying relationship with said first fold and in an overlying relationship with said second fold.

9. The folding device of claim 8 further comprising a fourth panel interconnecting said first and second panels, and a fifth panel interconnecting said first and third panels.

10. The folding device of claim 8 further comprising a support structure supporting at least one of said first, second and third panels.

11. The folding device of claim 8 wherein said first, second and third panels are formed from a single piece of material.

22. The folding device of claim 8 wherein said first folding edge comprises a curved lip portion.

12. A folding device for folding a web of sheet material comprising first, second and third folding edges extending from a first junction, wherein said second and third folding edges are formed in a first plane, and wherein said third folding edge extends from said first junction between said first and second folding edges, a fourth folding edge extending from said first junction and out of said first plane, a fifth and sixth folding edge extending from a second junction formed adjacent an end of said first folding edge opposite said first junction, said fifth and sixth folding edges formed in a second plane parallel to and spaced apart from said first plane, said fifth folding edge crossing over said third folding edge in a spaced apart relationship, and a seventh folding edge extending from said second junction and out of said second plane.

13. The folding device of claim 12 wherein said first, fourth and seventh folding edges form edges of a panel.

14. The folding device of claim 12 wherein said fifth and sixth folding edges form edges of a panel.

15. The folding device of claim 12 wherein said second and third folding edges form edges of a panel.

16. The folding device of claim 12 wherein said first, fourth and seventh folding edges form edges of a first panel, said second and third edges form edges of a second panel, and said fifth and sixth folding edges form edges of a third panel.

17. The folding device of claim 16 wherein said first, second and third panels are formed out of a single piece of material.

18. The folding device of claim 16 further comprising a fourth panel interconnecting said first and second panels, and a fifth panel interconnecting said first and third panels, wherein said first, second, third, fourth and fifth panels are formed from the same piece of material.

19. The folding device of claim 12 wherein said first junction is formed as a rounded notch.

20. The folding device of claim 12 wherein said second junction is formed as a rounded notch.

23. The folding device of claim 12 wherein said first folding edge comprises a curved lip portion.

24. The folding device of claim 12 wherein said first folding edge is formed in said first plane.