US4409274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material
Assignee: Westvaco Corp
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Filing: 1982-02-24
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Granted: 1983-10-11
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Expires: 2002-02-24
Abstract
Abstract A composite structural panel of high strength and toughness is relatively inexpensively formed with state-of-the-art corrugated paperboard equipment and technology by bonding structural reinforcing fiber to a corrugated medium at an approximately 15 DEG orientation angle relative to the medium flute axes.
Inventors
- 👤 Christopher R. Chaplin
- 👤 James E. Gordon
- 👤 Giorgio Jeronimidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:07
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/08; B32B3/00; B32B3/26; B32B3/28; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/3405; B32B2439/00; E04C2002/3444; E04C2002/3466; E04C2002/3472; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24124; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A composite structural material assembly comprising two planar face sheets separated by at least one, corrugated sheet having an indulating surface, said face sheets being attached to said corrugated sheet along respective corrugated flute ridge lines, the improvement comprising oriented structural fiber integrally attached to said corrugated sheet so as to follow the undulating surface of said corrugated sheet at an approximate orientation angle of 15° with said ridge lines.
Claim 2
Dependent Claim
70 words
A composite structural material assembly comprising two planar face sheets separated by at least one, corrugated sheet having an indulating surface, said face sheets being attached to said corrugated sheet along respective corrugated flute ridge lines, the improvement comprising oriented structural fiber integrally attached to said corrugated sheet so as to follow the undulating surface of said corrugated sheet at an approximate orientation angle of 15° with said ridge lines.
Claim 3
Dependent Claim
31 words
An article as described by claim 1 wherein said corrugated sheet is a resin impregnated oriented glass fiber mat having corrugation flutes formed therein at approximately 15° of said fiber orientation.
Claim 4
Dependent Claim
24 words
An article as described by claim 1 wherein said corrugated sheet comprises a corrugated kraft paper substrate having oriented, structural reinforcement fibers attached thereto.
Claim 5
Dependent Claim
20 words
An article as described by claim 3 wherein said fiber reinforced corrugated sheet is coated with a moisture impermeable substance.
Claim 6
Dependent Claim
20 words
An article as described by claim 3 wherein said fiber reinforced corrugated sheet is coated with an extruded, thermoplastic film.
Claim 7
Dependent Claim
102 words
An article as described by claim 1 comprising a second corrugated sheet also having structural fibers integrally attached thereto so as to follow the undulating surface thereof along an orientation of approximately 15% to corrugation flute ridge lines, said second corrugated sheet being attached to the opposite side of one face sheet from the first corrugated sheet, said first and second corrugated sheet ridge lines being attached in aligned juxtaposition to respectively opposite faces of said one face sheet with the 15° fiber orientation of said first corrugated sheet being oppositely disposed from the 15° fiber orientation of said second corrugated sheet.
Claim 8
Dependent Claim
48 words
An article as described by claim 1 comprising additional oriented structural fiber integrally attached to and in the plane of said face sheet at an approximate orientation angle of 15° with said flute ridge lines in the opposite angular sense from the orientation of said corrugated sheet fiber.
Claim 9
Dependent Claim
25 words
An article as described by claim 1 comprising the parallel flute lamination of at least two fiber attached corrugated sheets separated by one face sheet.
Claim 10
Dependent Claim
25 words
An article as described by claim 8 wherein the attached fiber of adjacent corrugated sheets has opposite orientation angles relative to respective flute ridge lines.
Claim 11
Dependent Claim
26 words
An article as described by claim 8 wherein the attached fiber of adjacent corrugated sheets has the same orientation angle relative to respective flute ridge lines.
Claim 12
Dependent Claim
48 words
An article as described by claim 10 comprising additional oriented structural fiber attached to and in the plane of said one face sheet at an approximate orientation angle of 15° with said flute ridge lines in the opposite angular sense from the orientation of said corrugated sheet fiber.
Claim 13
Dependent Claim
68 words
A composite structural material assembly comprising two planar face sheets separated by at least one undulating surface corrugated medium, said face sheets being attached to said medium along respective outside planes of corrugated flute ridges, the improvement comprising oriented structural fiber integrally attached to said medium so as to follow the undulating surface of said corrugated medium at an approximate orientation of 15° to said respective flute axes.
Claim 14
Dependent Claim
68 words
A composite structural material assembly comprising two planar face sheets separated by at least one undulating surface corrugated medium, said face sheets being attached to said medium along respective outside planes of corrugated flute ridges, the improvement comprising oriented structural fiber integrally attached to said medium so as to follow the undulating surface of said corrugated medium at an approximate orientation of 15° to said respective flute axes.
Claim 15
Dependent Claim
55 words
An article as described by claim 12 wherein said medium comprises a pair of fiber attached corrugated sheets, each sheet of said pair having structural fiber attached therewith at said orientation angle, said angles being oppositely oriented relative to corrugated flute axes and said sheet pair being attached together along respective external flute ridge lines.
Claim 16
Independent Claim
48 words
A method of fabricating a structural composite comprising the steps of corrugating an oriented fiber containing sheet to form parallel, elongated flutes extending approximately 15° from the oriented fiber direction and bonding a planar liner sheet to flute ridges on at least one face of said corrugated sheet.
Claim 17
Independent Claim
48 words
A method of fabricating a structural composite comprising the steps of corrugating an oriented fiber containing sheet to form parallel, elongated flutes extending approximately 15° from the oriented fiber direction and bonding a planar liner sheet to flute ridges on at least one face of said corrugated sheet.
Claim 18
Dependent Claim
59 words
A corrugated paperboard container comprising an undulating surface, corrugated medium element laminated to a planar facing sheet element along corrugation flute ridge lines, wherein structural reinforcing fibers are integrally attached to said corrugated medium element so as to follow the undulating surface thereof with a longitudinal orientation of said fibers disposed at approximately 15° from corrugated medium flute axes.
Claim 19
Dependent Claim
59 words
A corrugated paperboard container comprising an undulating surface, corrugated medium element laminated to a planar facing sheet element along corrugation flute ridge lines, wherein structural reinforcing fibers are integrally attached to said corrugated medium element so as to follow the undulating surface thereof with a longitudinal orientation of said fibers disposed at approximately 15° from corrugated medium flute axes.
Claim 20
Dependent Claim
30 words
A corrugated paperboard container as described by claim 15 wherein structural reinforcing fibers are integrally attached to and in the plane of said facing sheet associated with said medium element.
Claim 21
Dependent Claim
40 words
A corrugated paperboard container as described by claim 16 wherein said facing sheet fiber is oriented at an approximate orientation angle of 15° with said flute axes in the opposite angular sense from the orientation of said medium attached fiber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |