Patent US3890754A successfully refreshed from Google Patents.
US3890754A
Expired / Lapsed
US
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Corner bend in fibrous sheet material
Assignee: Individual
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Filing: 1973-10-09
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Granted: 1975-06-24
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Expires: 1993-10-09
Abstract
Abstract A method of forming an exterior corner bend in fibrous sheet material in which a pair of parallel, overlapping, V-shaped grooves are formed across one side surface of the material so as to provide a pair of bevelled edge faces spaced apart by a triangular rib, filling the V-shaped grooves with a liquid settable rib and maintaining the sheet in its bent condition until the adhesive sets.
Inventors
- 👤 Graham David Spurdle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:31
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
An exterior corner structure for a rigid sheet of fibrous material having a flexible sheet of finishing veneer on the exterior surface thereof comprising: a. a pair of sheet portions connected by said veneer extending unbroken between the two sheet portions, b. said sheet portions being at substantially a right angle to each other, c. said sheet portions having bevelled end faces, d. a central rib of triangular cross-section disposed between said end faces and connected to said veneer and having side surfaces spaced from said bevelled end faces, e. the inner edges of said sheet portions being in conTact with each other and said end faces being non-parallel to each other whereby a space is defined by said end faces of said sheet portions and said side surfaces of said central rib, and f. an adhesive substantially filling said space and bonded to said end faces and said side surfaces.
Claim 2
Dependent Claim
151 words
An exterior corner structure for a rigid sheet of fibrous material having a flexible sheet of finishing veneer on the exterior surface thereof comprising: a. a pair of sheet portions connected by said veneer extending unbroken between the two sheet portions, b. said sheet portions being at substantially a right angle to each other, c. said sheet portions having bevelled end faces, d. a central rib of triangular cross-section disposed between said end faces and connected to said veneer and having side surfaces spaced from said bevelled end faces, e. the inner edges of said sheet portions being in conTact with each other and said end faces being non-parallel to each other whereby a space is defined by said end faces of said sheet portions and said side surfaces of said central rib, and f. an adhesive substantially filling said space and bonded to said end faces and said side surfaces.
Claim 3
Dependent Claim
17 words
A corner bend as claimed in claim 1 in which the adhesive is a hot melt glue.
Claim 4
Dependent Claim
22 words
A corner bend as claimed in claim 1 in which the triangularly shaped rib has a base length of substantially one-sixteenth inches.
References Cited (Backward Citations)
US2505789A
Cited
US3200547A
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US3649398A
Cited
US3517427A
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US3654053A
Cited
US3729870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |