Patent FR2198580A5 successfully refreshed from Google Patents.
US5087400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a product serving as a cultivation support
Assignee: Wogegal SA
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Filing: 1989-01-11
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Granted: 1992-02-11
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Expires: 2009-01-11
Abstract
Abstract Process and installation for making a composite product, obtained by removing the fibre from wood chippings or other cellulose raw material, especially for above-ground cultivation purposes. The chippings (3) are place in a two-screw (2) fibre-removing machine (1), the overall characteristics being adjusted in such a way as to obtain, at the outlet of the machine (1), a mixture (31) based on isolated fibres and agglomerated bunches of fibres, of varying lengths and grain dimensions. An adhesive binder is inserted at a set feed-rate in the sleeve (11) during fibre removal so that it spreads through the fibre mixture in a discontinuous manner. By controlling the temperature the hardening of the binder can be delayed until the product emerges from the machine (1). Also covered is the product obtained in the form of a rigid block inserted in a sealed jacket.
Inventors
- 👤 Christian Theuveny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/12; B30B9/16; A; A01; A01G; A01G24/00; A01G24/20; A01G24/22; A01G24/23; A01G24/40; A01G24/44; B30B9/121; D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
A process for making a composite product obtained by grinding wood chips or other lignocellulosic raw material, comprising the steps of: passing the material through a machine, said machine comprising at least two screws driven in rotation inside a barrel which encloses them and provided with flights of various pitches; regulating the conveying characteristics of said material so as to produce a controlled degree of grinding to obtain, at the outlet of the machine, a mixture based on isolated fibers and agglomerated bundles of fibers of various lengths and particle sizes; introducing an adhesive binder into the barrel during the grinding at a rate regulated as a function of the conveying conditions of the material so that the adhesive is distributed in the mixture of fibers; and delaying curing of the adhesive binder by controlling the temperature of the material so that curing takes place only after leaving the machine.
Claim 2
Dependent Claim
150 words
A process for making a composite product obtained by grinding wood chips or other lignocellulosic raw material, comprising the steps of: passing the material through a machine, said machine comprising at least two screws driven in rotation inside a barrel which encloses them and provided with flights of various pitches; regulating the conveying characteristics of said material so as to produce a controlled degree of grinding to obtain, at the outlet of the machine, a mixture based on isolated fibers and agglomerated bundles of fibers of various lengths and particle sizes; introducing an adhesive binder into the barrel during the grinding at a rate regulated as a function of the conveying conditions of the material so that the adhesive is distributed in the mixture of fibers; and delaying curing of the adhesive binder by controlling the temperature of the material so that curing takes place only after leaving the machine.
Claim 3
Dependent Claim
32 words
The process according to claim 1, wherein the grinding conditions are regulated so as to obtain a mixture of fibers whose lengths can range from a few microns to approximately one centimeter.
Claim 4
Dependent Claim
53 words
The process according to claim 2, wherein the mixture obtained includes isolated fibers, fiber agglomerates and filaments whose particle size distribution is such that at least 60% of the mixture is retained on a 14 mesh screen and that the proportion of fines passing through the 200 mesh screen is less than 10%.
Claim 5
Dependent Claim
67 words
The process according to claim 1, wherein at least in the first part of the screw grinding machine, a progressive compression with trituration and fractionation of the chips is performed, wherein at least a part of the resin and of the water which are bound to the chips is removed by filtering means arranged in the barrel to reach a dry content of between 0.45 and 0.55.
Claim 6
Dependent Claim
35 words
The process according to claim 4, wherein in the first stage of progressive compression, a sterilization of the chips is carried out by raising the temperature to a level between 120° C. and 140° C.
Claim 7
Dependent Claim
47 words
The process according to claim 1, wherein, before the introduction of the adhesive binder, the temperature of the mixture is decreased to a level which does not permit the binder to cure, said temperature being maintained at least as far as the outlet of the grinding machine.
Claim 8
Dependent Claim
22 words
The process according to claim 1, wherein at least one liquid or solid additive is introduced into the barrel during the grinding.
Claim 9
Dependent Claim
34 words
The process according to claim 1, wherein after leaving the grinding machine, the mixture is cooled and dried to a temperature below 50° C. and a dry content no greater than 0.6 is obtained.
Claim 10
Dependent Claim
53 words
The process according to claim 1, wherein the mixture leaving the grinding machine is shaped, by molding and/or profiling, into a product of specified dimensions and density and the temperature of the mixture is then raised to a level above 100° C. so as to fix the said dimensions by curing the adhesive.
Claim 11
Dependent Claim
24 words
The process according to claim 9, wherein the mixture is shaped into a beam continuously and is then divided into loaves of specified lengths.
Claim 12
Dependent Claim
34 words
The process according to claim 3, wherein in the first stage of compression a sterilization of the chips is carried out by raising the temperature to a level between 120° C. and 140° C.
Claim 13
Dependent Claim
47 words
The process according to claim 5, wherein before the introduction of the adhesive binder, the temperature of the mixture is decreased to a level which does not permit the binder to cure, said temperature being maintained at least as far as the outlet of the grinding machine.
Claim 14
Dependent Claim
23 words
The process according to claim 7, wherein said additive includes at least one of a wetting product or microorganisms which promote plant growth.
Claim 15
Dependent Claim
17 words
The process according to claim 1, wherein the adhesive is distributed noncontinuously in the mixture of fibers.
References Cited (Backward Citations)
US2757115A
Cited
US3533563A
Cited
US3903229A
Cited
US4088528A
Cited
US4218414A
Cited
US4605401A
Cited
US4402896A
Cited
US4950444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |