US5028374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a molded wooden product
Assignee: Toyota Motor Corp
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Filing: 1990-01-29
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Granted: 1991-07-02
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Expires: 2010-01-29
Abstract
Abstract A binder, a water-repelling agent, and a mold release agent are added to wooden fibers obtained by splitting wood chips. This mixture is collected into a body having a particular shape without being formed into a mat. The collected body is compression molded under heat to make a molded wooden product.
Inventors
- 👤 Eiichi Imao
- 👤 Sadao Kieda
- 👤 Yoshio Taguchi
- 👤 Hideaki Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:21
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B27; B27N; B27N1/00; B27N3/00; B27N3/08; B27N3/20; B27N3/22; B27N5/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
110 words
A method of manufacturing a molded wooden product having a deeply drawn portion comprising: floating, on a gaseous stream, a mixture of wooden fibers containing a binder, onto a first perforated member in a vessel, said first perforated member having a recessed portion corresponding to said deeply drawn portion; forming a body in a single step by gathering said mixture of fibers on said first perforated member in said vessel; attracting said body against a second perforated member in said vessel; removing said body from said vessel; delivering said body to a compression mold; and compression molding said body under heat to form said product having a deeply drawn portion.
Claim 2
Independent Claim
110 words
A method of manufacturing a molded wooden product having a deeply drawn portion comprising: floating, on a gaseous stream, a mixture of wooden fibers containing a binder, onto a first perforated member in a vessel, said first perforated member having a recessed portion corresponding to said deeply drawn portion; forming a body in a single step by gathering said mixture of fibers on said first perforated member in said vessel; attracting said body against a second perforated member in said vessel; removing said body from said vessel; delivering said body to a compression mold; and compression molding said body under heat to form said product having a deeply drawn portion.
Claim 3
Dependent Claim
18 words
A method as set forth in claim 1 wherein said mixture is floated on a stream of air.
Claim 4
Dependent Claim
37 words
A method as set forth in claim 1, wherein at least one selected portion of said body is attracted against said first perforated member in said vessel at a different time than other portions of said body.
Claim 5
Dependent Claim
33 words
A method as set forth in claim 1, wherein said attraction against said second perforated member in said vessel is terminated when said body has been brought to a position above said mold.
Claim 6
Dependent Claim
39 words
A method as set forth in claim 4, wherein said second perforated member in said vessel is strongly attracted to that portion of said body which will be deeply drawn when said body is molded, before said termination occurs.
Claim 7
Dependent Claim
25 words
A method as set forth in claim 1, further comprising piercing a plurality of needles into said body before it is conveyed to said mold.
Claim 8
Dependent Claim
34 words
A method as set forth in claim 1, further comprising shaping at least one surface of said body with a cutter provided in a path along which said body is conveyed to said mold.
Claim 9
Dependent Claim
25 words
A method as set forth in claim 1, wherein said mixture of fibers and binder is fluidized before it is gathered to form said body.
Claim 10
Dependent Claim
25 words
A method as set forth in claim 8, further comprising piercing a plurality of needles into said body before it is conveyed to said mold.
Claim 11
Dependent Claim
31 words
A method as set forth in claim 1, wherein said body is heated with a heat medium selected from hot air and stream prior to delivering said body to said mold.
Claim 12
Dependent Claim
34 words
A method as set forth in claim 8, further comprising shaping at least one surface of said body with a cutter provided in a path along which said body is conveyed to said mold.
Claim 13
Dependent Claim
29 words
A method as set forth in claim 1, wherein said body has a first portion composed of relatively short fibers and a second portion composed of relatively long fibers.
Claim 14
Dependent Claim
37 words
A method as set forth in claim 1, wherein at least one selected portion of said body is attracted against said second perforated member in said vessel at a different time than other portions of said body.
References Cited (Backward Citations)
US2471932A
Cited
US2459804A
Cited
US2624079A
Cited
US2811195A
Cited
US3025202A
Cited
JPS5343779A
Cited
DE2743873A1
Cited
JPS54124081A
Cited
US4440708A
Cited
JPS569480A
Cited
US4495119A
Cited
US4592708A
Cited
US4568581A
Cited
US4666647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |