METHOD OF MAKING FORAMINOUS STRUCTURES

• US 3,847,701 A
• Filed: 02/16/1970
• Issued: 11/12/1974
• Est. Priority Date: 02/16/1970
• Status: Expired due to Term

• Current Assignee: Theodore H. Fairbanks
• Original Assignee: Theodore H. Fairbanks
• Inventors: Fairbanks, Theodore H.
• Primary Examiner(s): Feinberg, Samuel
• Application Number:
  US05/011,510
• Time in Patent Office: 1,730 Days
• Field of Search: 156/259,110-113,253,205,292 161/110-113,68 52/10 229/29F
• US Class Current: 156/259
• CPC Class Codes: B26F 1/18 Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
• CPC Class Codes: B29C 2793/00 Shaping techniques involving a cutting or machining operation
• CPC Class Codes: B29C 48/0011 combined with compression moulding
• CPC Class Codes: B29C 48/0012 combined with shaping by internal pressure generated in the material, e.g. foaming
• CPC Class Codes: B29C 48/0023 combined with printing or marking
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 69/00 Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore B29C48/001 takes precedence
• CPC Class Codes: B29D 24/004 the structure having vertical or oblique ribs
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B32B 2327/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2377/00 Polyamides
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 3/12 characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
• CPC Class Codes: E04C 2/34 composed of two or more spaced sheet-like parts E04C2/32 takes precedence; spacers for cavity walls E04B2/44
• CPC Class Codes: Y10T 156/1067 Continuous longitudinal slitting

Abstract

A method of making a foraminous structure, having a plurality of walls, each extending between pairs of spaced surfaces which are disposed in staggered relationship along a common plane. The walls are pivotally connected to edges of the spaced surfaces between which they extend and may be disposed, relative thereto, at an angle approaching 180*.

Claims

1. A method of making a foraminous structure including the steps of providing a web material with rows of like, equally spaced cross-cuts, each of the cross-cuts comprised of a pair of slits of equal length crossing substantially centrally of and at right angles to each other and arranged with ends thereof located along a common line passing through the ends of slits of an adjacent cross-cut, and pivoting as integral units portions of the web material which extend between adjacent cross-cuts by urging the same about axes which are generally coincident with the common lines passing through the ends of slits of the adjacent crosscuts between which the respective portions of the web material extend.

2. A method as defined in claim 1 wherein the pivoted units of web material are disposed in rows which are in substantially parallel relationship with each other.

3. A method as defined in claim 2 wherein the units are pivoted substantially 180* relative to the original plane of the web material and are fixed in their pivoted positions.

4. A method as defined in claim 1 wherein the pivoted units of web material are disposed in rows with each row of such units intersecting at substantially right angles with another row of pivoted planar units.

5. A method as defined in claim 4 wherein all units of web material are pivoted through an angle of substantially 90* relative to the original plane of the web material.

6. A method as defined in claim 5 further including the step of attaching a continuous sheet to the outermost ends of the pivoted units of the web material to provide a cellular panel structure.

7. A method as defined in claim 4 wherein the units are pivoted substantially 180* relative to the original plane of the web material and are fixed in their pivoted positions to provide the web material with openings of generally rectangular configuration.