Woven fabric membrane for a seating surface

• US 6,035,901 A
• Filed: 06/07/1995
• Issued: 03/14/2000
• Est. Priority Date: 06/15/1992
• Status: Expired due to Term

• Current Assignee: Herman Miller Incorporated
• Original Assignee: Herman Miller Incorporated
• Inventors: Sayers, Randy J., Coffield, Timothy P., Schoenfelder, Rodney C., Cammenga, Eric, Keller, Carolyn, Chadwick, Donald, Bruner, Jeffrey W., Stumpf, William E.
• Primary Examiner(s): FALIK, ANDREW M
• Application Number:
  US08/487,284
• Time in Patent Office: 1,742 Days
• Field of Search: 160/371, 160/378, 297/452.64, 297/463.2, 139/420 A, 139/383 R, 139/421, 139/426 R, 139/50, 139/419, 5/230, 428/231, 428/229, 428/226, 442/184
• US Class Current: 139/419
• CPC Class Codes: A47C 1/03 the parts being arm-rests conversion into a bed A47C17/12
• CPC Class Codes: A47C 1/0303 adjustable rectilinearly in vertical direction
• CPC Class Codes: A47C 1/03238 by means of peg-and-notch or pawl-and-ratchet mechanism
• CPC Class Codes: A47C 1/03255 with a central column, e.g. rocking office chairs
• CPC Class Codes: A47C 1/03261 characterised by elastic means
• CPC Class Codes: A47C 3/30 with vertically-acting fluid cylinder
• CPC Class Codes: A47C 5/06 Special adaptation of seat upholstery or fabric for attachment to tubular chairs
• CPC Class Codes: A47C 7/029 of non-adjustable shape adapted to a user contour or ergonomic seating positions
• CPC Class Codes: A47C 7/14 of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions movably-coupled seat and backrests with elastic adjustment means A47C1/03261; elastically-mounted back-rests or backrest-seat units in the base frame A47C7/44
• CPC Class Codes: A47C 7/282 with mesh-like supports, e.g. elastomeric membranes
• CPC Class Codes: A47C 7/40 for the back
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/14631 Coating reinforcements fibre reinforcements B29C45/0005
• CPC Class Codes: B29K 2713/00 Use of textile products or fabrics for preformed parts, e.g. for inserts B29K2105/06 takes precedence
• CPC Class Codes: B29L 2031/443 Chairs
• CPC Class Codes: Y10T 29/49863 with prestressing of part
• CPC Class Codes: Y10T 29/49867 of skin on frame member
• CPC Class Codes: Y10T 29/4998 Combined manufacture including applying or shaping of fluent material
• CPC Class Codes: Y10T 29/49998 Work holding
• CPC Class Codes: Y10T 403/32475 having detent
• CPC Class Codes: Y10T 442/3024 : Including elastic strand or strip

Abstract

A membrane for a seating structure including a plurality of groups of at least two adjacent and parallel strands of multifilament yarn and a plurality of monofilaments arranged in generally perpendicular interlocking relationship with the strands. The monofilaments weave alternatively above and below the adjacent strands in each group. A plurality of pairs of the monofilaments hold the groups of strands in place by having the monofilaments in each pair cross over between each group of strands. In one aspect, the membrane is attached to a frame member such that the plurality of groups of strands are oriented in the longitudinal direction of the frame member and the monofilaments are oriented in the lateral warp direction of the frame member. In another aspect, the seating structure includes the frame member and attached membrane.

Claims

1. A seating structure having a fabric having a weave pattern for supporting the body of a user on the seating structure, the fabric comprising:

a plurality of groups of parallel strands of multifilament yarn, each group having at least two adjacent strands; and

a plurality of monofilaments arranged in generally perpendicular interlocking relationship with the strands, said monofilaments weaving alternatively above and below adjacent strands in a group, and said groups being held in place by a plurality of pair of said monofilaments, the monofilaments in each pair crossing over between each group of strands to thereby maintain the position of the groups.

2. The seating structure of claim 1 wherein each of said groups comprises three strands of yarn.

3. The seating structure of claim 1 wherein the monofilaments are made of an elastomeric material.

4. The seating structure of claim 3 further comprising a frame member having an opening and wherein the monofilaments are prestretched across the opening in the frame member and wherein the fabric is attached to the frame member.

5. The seating structure of claim 4 further comprising a carrier member attached to the fabric, and wherein said frame member comprises a channel, said carrier member inserted in said channel.

6. The seating structure of claim 4 wherein the monofilaments are prestretched between 6% and 9%.

7. The seating structure of claim 3 wherein the monofilaments have a greater width than thickness to increase the surface area in contact with a user sitting on the fabric.

8. The seating structure of claim 1 wherein the monofilaments have an elliptical cross-section.

9. The seating structure of claim 3 further comprising an elastomeric monofilament attached to each strand of yarn.

10. The seating structure of claim 1 wherein there are about 24-26 monofilaments per inch and about 7-10 strands per inch.

11. The seating structure of claim 1 wherein the monofilaments are oriented in a lateral warp direction of a frame member of the seating structure and the strands are oriented in a longitudinal filling direction of said frame member.

12. The seating structure of claim 1 wherein said fabric forms an exposed support surface.

13. The seating structure of claim 12 comprising a seat comprising the exposed support surface.

14. The seating structure of claim 13 wherein said seat further comprises a seat frame member having an opening therethrough, and wherein said fabric is supported by said frame member across said opening to form said exposed support surface.

15. The seating structure of claim 14 wherein said frame member comprises a channel, wherein said fabric is attached to a carrier member, and wherein said carrier member is inserted in said channel.

16. The seating structure of claim 14 wherein said fabric is prestreched across said opening of the frame member.

17. The seating structure of claim 16 wherein said fabric is prestreched between 6% and 9% in at least one direction.

18. The seating structure of claim 12 comprising a backrest comprising the exposed support surface.

19. The seating structure of claim 18 wherein said backrest further comprises a backrest frame member having an opening therethrough, and wherein said fabric is supported by said frame member across said opening to form said exposed support surface.

20. The seating structure of claim 19 wherein said backrest frame member comprises a channel, wherein said fabric is attached to a carrier member, and wherein said carrier member is inserted in said channel.

21. An exposed fabric having a weave pattern for supporting the body of a user in a chair, the fabric comprising:

a plurality of groups of parallel strands of multifilament yarn oriented in a longitudinal filling direction of a frame member of the chair, each group having at least two adjacent strands; and

a plurality of elastomeric monofilaments prestretched in a lateral warp direction of the frame member and arranged in generally perpendicular interlocking relationship with the strands, said monofilaments weaving alternatively above and below adjacent strands in a group, and said groups being held in place by a plurality of pairs of said monofilaments, the monofilaments in each pair crossing over between each group of strands to thereby maintain the position of the groups.

22. The fabric of claim 21 wherein each of said groups comprises three strands of yarn.

23. The fabric of claim 21 wherein the monofilaments have an elliptical cross-section.

24. The fabric of claim 21 further comprising an elastomeric monofilament attached to each strand of yarn.

25. The fabric of claim 21 wherein there are about 24-26 monofilaments per inch and about 7-10 strands per inch.

26. A chair comprising:

a frame member; and

an exposed fabric attached to said frame member, said exposed fabric comprising;

a plurality of groups of parallel strands of multifilament yarn oriented in a longitudinal filling direction of the frame member, each group having at least two adjacent strands; and

a plurality of elastomeric monofilaments prestretched in a lateral warp direction of the frame member and arranged in generally perpendicular interlocking relationship with the strands, said monofilaments weaving alternatively above and below adjacent strands in a group, and said groups being held in place by a plurality of pairs of said monofilaments, the monofilaments in each pair crossing over between each group of strands to thereby maintain the position of the groups.

27. The chair of claim 26 wherein said frame and said exposed fabric form a seat of the chair.

28. The chair of claim 26 wherein said frame and said exposed fabric form a backrest of the chair.

29. The chair of claim 26 wherein said frame comprises a channel, and wherein said fabric is attached to a carrier member, said carrier member inserted in said channel.

30. The chair of claim 26 wherein said frame has an opening therethrough, and wherein said fabric is supported across said opening.

31. The chair of claim 30 wherein said monofilaments are prestreched between 6% and 9%.

32. The chair of claim 26 wherein each of said groups comprises three stands of yarn.

33. The chair of claim 26 wherein the monofilaments have an elliptical cross-section.

34. The chair of claim 26 further comprising an elastomeric monofilament attached to each strand of yarn.

35. An exposed fabric having a weave pattern for supporting the body of a user, the fabric comprising:

a plurality of groups of parallel strands of multifilament yarn, each group having at least two adjacent strands; and

a plurality of elastomeric monofilaments arranged in generally perpendicular interlocking relationship with the strands, said monofilaments weaving alternatively above and below adjacent strands in a group, and said groups being held in place by a plurality of pairs of said monofilaments, the monofilaments in each pair crossing over between each group of strands to thereby maintain the position of the groups.

36. The fabric of claim 35 wherein the monofilaments are adapted to be prestretched across an opening in a frame member.

37. The fabric of claim 35 wherein the monofilaments have a greater width than thickness to increase the surface area in contact with a user sitting on the fabric.

38. The fabric of claim 37 wherein the monofilaments have an elliptical cross-section.

39. The fabric of claim 35 further comprising an elastomeric monofilament attached to each strand of yarn.

40. The fabric of claim 35 wherein there are about 24-26 monofilaments per inch and about 7-10 strands per inch.

41. A seating structure having an exposed fabric for supporting the body of a user on the seating structure, the exposed fabric comprising a plurality of generally parallel elastomeric monofilaments having a greater width than thickness to increase the surface area in contact with a user sitting on the fabric, and a second plurality of monofilaments arranged in generally perpendicular interlocking relationship with said first plurality of monofilaments, said second monofilaments weaving alternatively above and below adjacent monofilaments of said first plurality of monofilaments.