US4232067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconsolidated wood product
Assignee: Commonwealth Scientific and Industrial Research Organisation
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Filing: 1978-10-26
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Granted: 1980-11-04
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Expires: 1998-10-26
Abstract
Abstract Reconsolidated wood product and process and apparatus for forming the product, the product being formed from webs of splintered natural wood broken down by crushing or like processes, the webs being consolidated by compression and bonded with an adhesive.
Inventors
- 👤 John D. Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:06
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/04; B27N3/08; B27N3/10; B27N3/14; B27N3/143; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1064; Y10T156/1075; Y10T156/1082; Y10T156/12; Y10T156/13; Y10T156/1317; Y10T156/1322; Y10T156/17; Y10T156/1702; Y10T156/1744; Y10T156/1749; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24066; Y10T428/24124; Y10T428/24132; Y10T428/24355; Y10T428/24438; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/2457; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31989; Y10T428/4935; Y10T428/662; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/664
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
52 words
Reconsolidated wood product including at least one flexible open lattice work web of naturally interconnected wood strands, said strands extending substantially parallel to each other in the direction of the grain of the natural wood and a bonding agent bonding together said strands which have been consolidated to substantially their original orientation.
Claim 2
Dependent Claim
52 words
Reconsolidated wood product including at least one flexible open lattice work web of naturally interconnected wood strands, said strands extending substantially parallel to each other in the direction of the grain of the natural wood and a bonding agent bonding together said strands which have been consolidated to substantially their original orientation.
Claim 3
Dependent Claim
20 words
Reconsolidated wood products as claimed in claim 1, wherein said wood product is formed from a plurality of said webs.
Claim 4
Dependent Claim
65 words
Reconsolidated wood product as claimed in claim 1, wherein there are defined, within the product, a plurality of bonded together local volumes, each volume having at least one of said webs bonded by said bonding agent, the strands within each local volume being generally aligned in the same direction and the strands in at least two of these local volumes being aligned in different directions.
Claim 5
Dependent Claim
26 words
Reconsolidated wood product as claimed in claim 3, wherein said local volumes are formed by respective overlying laminations, each lamination comprising one or more said webs.
Claim 6
Dependent Claim
80 words
Reconsolidated wood product as claimed in claim 1, having a surface portion at which the said strands are aligned in one direction, said surface portion having therein a plurality of indentations substantially between said strands, which indentations are elongate in said direction and have opposed sides which extend in said direction and which, where they meet the surface portion, define respective lines which diverge from generally pointed ends of the respective indentations towards respective wider intermediate portions of the indentations.
Claim 7
Dependent Claim
55 words
Reconsolidated wood product as claimed in claim 5, wherein said product is planar with a separate said surface portion defining each opposed major face of the product, the said direction being the same at each said opposed surface portion and said indentations being on each opposed said surface portion, and not opposed to one another.
Claim 8
Dependent Claim
33 words
Reconsolidated wood product as claimed in claim 6, wherein each said indentation varies in depth from a maximum depth at said intermediate portion thereof to a minimum depth towards each said end thereof.
Claim 9
Dependent Claim
43 words
Process for forming a reconsolidated wood product consisting substantially of the steps of rending natural wood to form a flexible open lattice work web of substantially parallel aligned, naturally interconnected strands, compressing the web to consolidate the strands and bonding said strands together.
Claim 10
Dependent Claim
43 words
Process for forming a reconsolidated wood product consisting substantially of the steps of rending natural wood to form a flexible open lattice work web of substantially parallel aligned, naturally interconnected strands, compressing the web to consolidate the strands and bonding said strands together.
Claim 11
Dependent Claim
21 words
Process as claimed in claim 8, wherein said rending is effected by subjecting the natural wood to pressure by roller means.
Claim 12
Dependent Claim
26 words
Process as claimed in claim 9, wherein said rending is carried out by engaging the natural wood with a roller having a smooth cylindrical outer surface.
Claim 13
Dependent Claim
25 words
Process as claimed in claim 9, wherein said rending is carried out by engaging the natural wood with a roller having a textured outer surface.
Claim 14
Dependent Claim
30 words
Process as claimed in claim 9, wherein said rending is effected by passing the natural wood successively through successive cooperating roller pairs to produce progressively increased splintering at each pair.
Claim 15
Dependent Claim
26 words
Process as claimed in claim 12, wherein nips of said roller pairs are non-parallel when viewed in the direction of travel of the natural wood therethrough.
Claim 16
Dependent Claim
32 words
Process as claimed in claim 9, wherein said roller pairs are driven such that the peripheral speeds of the rollers of the roller pairs are not the same for all roller pairs.
Claim 17
Dependent Claim
33 words
Process as claimed in claim 8, wherein said rending is effected or assisted by subjecting a length of said natural wood to torsional stress by counter rotating the opposite ends of said length.
Claim 18
Dependent Claim
28 words
Process as claimed in claim 8, wherein said rending is effected or assisted by repeatedly impacting or piercing said natural wood, at spaced locations along the length thereof.
Claim 19
Dependent Claim
42 words
Process as claimed in claim 8, wherein said compression is effect by passing the web through presser rolls or between a pair of belts driven to engage the web from opposed sides and to move the web through the pair of belts.
Claim 20
Dependent Claim
22 words
Process as claimed in claim 8, wherein said compression is effected by loading said web into a mould and applying pressure thereto.
Claim 21
Dependent Claim
21 words
Process as claimed in claim 8, wherein said bonding is effected by use of a bonding agent added to said web.
Claim 22
Dependent Claim
25 words
Process as claimed in claim 18, wherein bonding agent to effect said bonding is introduced into said mould prior to said compression within the mould.
Claim 23
Dependent Claim
35 words
Process as claimed in claim 17, wherein bonding agent to effect said bonding is applied to said web prior to said compression by dipping it into a bath of said bonding agent in liquid form.
Claim 24
Dependent Claim
26 words
Process as claimed in claim 21, wherein excess liquid is removed after said dipping and prior to said compression by subjecting it to an air blast.
Claim 25
Dependent Claim
27 words
Process as claimed in claim 22, wherein the web is dried before dipping and subjected to a warm environment to allow evaporation of moisture therefrom after dipping.
Claim 26
Dependent Claim
64 words
Process as claimed in claim 8, wherein indentations are formed into the consolidated web during said compression thereof and prior to completion of the bonding, said indentations being aligned with the direction of lengthwise extent of the wood strands by pressing tapered elongated projections into the web as it is being consolidated so as to force said strands apart without cutting of the strands.
Claim 27
Dependent Claim
18 words
Process as claimed in claim 8, wherein a number of said webs are combined to form said matrix.
Claim 28
Dependent Claim
30 words
Process as claimed in claim 8, wherein a number of said matrices are combined to form said product, the directions of alignment of strands in adjacent said matrices being nonparallel.
References Cited (Backward Citations)
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |