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US3621897A
Expired / Lapsed
US
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Process for the improvement of natural wood, particularly for the production of compressed wooden components provided if required with ornamentation
Assignee: JOSEPH PRUGGER
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Filing: 1970-02-27
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Granted: 1971-11-23
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Expires: 1990-02-27
Abstract
Abstract A process for producing compressed wooden components provided if required with ornamentation, comprising the operations of immersing the natural initial wood in an aqueous bath containing pyridene, then drying the wood to a residual moisture content of 12-16 percent and finally compressing the pretreated wood under the simultaneous action of heat at a temperature of about 180* C. During hot compression the desired ornamentation may be impressed by means of a mold corresponding to the negative of the ornamentation. Vacuum may be applied during this operation. Alternatively the wood pretreated by the water-pyridene bath may be first compressed into a panel with plane faces and this panel may be successively further compressed in a mold for impressing the ornamentation.
Inventors
- 👤 Luigi Vazzola
- 👤 Gottfried Ortner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
B; B27; B27M; B27M1/00; B27M1/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
35 words
A process as claimed in claim 1, in which the natural wood is immersed for some minutes in a bath consisting of 3 parts by weight of water and 1 part by weight of pyridine.
Claim 2
Dependent Claim
41 words
A process as claimed in claim 1, in which the wood impregnated by the aqueous bath containing pyridine is dried by means of hot air at a temperature of about 60*-80* C., from which the excess water-pyridine mixture is continually eliminated.
Claim 3
Dependent Claim
26 words
A process as claimed in claim 1, in which the wood prepared with the water-pyridine mixture which is subjected to hot compression comprises a single piece.
Claim 4
Dependent Claim
38 words
A process as claimed in claim 1, in which the wood prepared with the water-pyridine mixture which is subjected to hot compression comprises a number of pieces, preferably disposed as layers, superimposed horizontally or side by side vertically.
Claim 5
Dependent Claim
32 words
A process as claimed in claim 1, in which the hot compression of the wood prepared with the water-pyridine mixture is carried out in a number of successive stages with intermediate intervals.
Claim 6
Dependent Claim
42 words
A process as claimEd in claim 1, in which the wood prepared with the water-pyridine mixture is hot compressed between the faces of a press and the compressed panel obtained is planed on that face of it which will be in view.
Claim 7
Dependent Claim
72 words
A process as claimed in claim 7, in which the compressed panel planed on the face or faces which will be in view is introduced between the faces of a press, at least one of which faces carries a mold whose profile corresponds to the negative of an ornamentation to be impressed on the compressed panel, and a further compression is carried out in said press under the simultaneous action of heat.
Claim 8
Dependent Claim
45 words
A process as claimed in claim 1, in which the wood prepared with the water-pyridine mixture is hot compressed in a mold of which at least one internal surface has a profile corresponding to the negative of an ornamentation to be impressed on the wood.
Claim 9
Dependent Claim
30 words
A process as claimed in claim 9, in which during the hot compression of the wood prepared with the water-pyridine mixture, the inside of the mold is put under vacuum.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |