US4387128A
Expired / Lapsed
US
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Foldable structure
Assignee: Brymitre Ltd
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Filing: 1980-07-08
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Granted: 1983-06-07
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Expires: 2000-07-08
Abstract
Abstract A foldable structure (2) and a method of manufacturing a foldable structure which, when folded produces a curved edge or corner. The structure comprises two panel members (32,34) having a respective edge region (18,20) which are adjacent and are spaced apart. Each edge region has a shoulder (8,10) and a curved portion (12,14). A flexible elongated bridging piece (22) is located between the shoulders (8,10) and defines a foldable region. A flexible lamina (24) covers a respective face of the panel members (32,34) and the flexible bridging piece (22).
Inventors
- 👤 Roy O. Emms
- 👤 William Rae
- 👤 John Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:01
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B29C53/063; B29C53/066; B27; B27G; B27G5/00; F; F16; F16B; F16B12/00; F16B12/04; A; A47; A47B; A47B96/00; A47B96/20; A47B96/202; F16B2200/00; F16B2200/65; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/195; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/24264; Y10T428/24479; Y10T428/24488; Y10T428/24777; Y10T428/31504; Y10T428/3167; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A foldable planar structure for use in forming a curved edge or corner by bending the initially planar structure, the planar structure comprising two chipboard panel members, a flexible lamina formed of PVC material and a flexible strip-like cork insert member, the two panel members being disposed in side by side relation with a respective edge of each panel arranged in adjacent relation, and each panel member having an arcuate surface extending from said edge towards one face of the panel, the flexible insert member bridging said edges and backing up said flexible lamina, said flexible lamina overlying and being adhered to said one face of each panel member and to said cork insert member whereby, on bending the structure from its initially planar form, the flexible cork insert member contacts the said arcuate surfaces which define the shape of the curved edge or corner so formed.
Claim 2
Dependent Claim
147 words
A foldable planar structure for use in forming a curved edge or corner by bending the initially planar structure, the planar structure comprising two chipboard panel members, a flexible lamina formed of PVC material and a flexible strip-like cork insert member, the two panel members being disposed in side by side relation with a respective edge of each panel arranged in adjacent relation, and each panel member having an arcuate surface extending from said edge towards one face of the panel, the flexible insert member bridging said edges and backing up said flexible lamina, said flexible lamina overlying and being adhered to said one face of each panel member and to said cork insert member whereby, on bending the structure from its initially planar form, the flexible cork insert member contacts the said arcuate surfaces which define the shape of the curved edge or corner so formed.
Claim 3
Dependent Claim
57 words
A foldable structure according to claim 1 wherein said edge is formed at the intersection of said arcuate surface and an opposite face of said panel which opposite face is parallel to said one face, each arcuate surface extending through an arc of 90° so that when the structure is folded a 180° curved edge is formed.
Claim 4
Dependent Claim
39 words
A foldable structure according to claim 1 wherein each panel member has an inclined planar surface which intersects and extends between said edge and an opposite face of the panel, which opposite face is parallel with said one face.
Claim 5
Dependent Claim
49 words
A foldable structure according to claim 3 wherein each arcuate surface extends through an arc of 45° and the respective planar surfaces are disposed at 90° one to the other so that the panels of the structure lie at right angles to one another when the structure is folded.
Claim 6
Dependent Claim
24 words
A foldable structure according to claim 3 wherein each panel has a shoulder which is disposed between said arcuate surface and said one face.
Claim 7
Dependent Claim
20 words
A foldable structure according to claim 5 wherein said shoulder extends inwardly from said one face at an oblique angle.
Claim 8
Dependent Claim
20 words
A foldable structure according to claim 5 wherein the shoulder is perpendicular to and extends inwardly from said one face.
Claim 9
Dependent Claim
48 words
A foldable structure according to claim 5 wherein said shoulder has an inclined portion which extends inwardly from said one face at an oblique angle and a portion which is perpendicular to the said one face and which is disposed between the inclined portion and said arcuate surface.
Claim 10
Dependent Claim
29 words
A foldable structure according to claim 8 wherein the flexible insert member has respective longitudinal edges which correspond in shape to the said shoulders of the two panel members.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |