US3900957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for drying wood employing paper-reinforced, thermosetting resin laminate and method of making such
Assignee: Simpson Timber Co
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Filing: 1973-11-23
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Granted: 1975-08-26
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Expires: 1993-11-23
Abstract
Abstract An improved method and system of kiln-drying wood is disclosed wherein the courses of wood in a conventional drying kiln are separated by strong, dimensionally stable, re-usable kiln stickers made of paper-reinforced, thermosetting resin laminae having a thickness ranging from 1/4 inch to 1 inch. Use of the laminated stickers enables increased kiln capacity, more uniform drying, and faster drying schedules. The laminated stickers have a longer production life compared with conventional wood stickers. The laminate is made by saturating a resin-saturating paper with thermosetting resin, such as a phenol-formaldehyde resin or lignin-phenol-formaldehyde resin. A series of the resin impregnated sheets are stacked to provide the requisite thickness and heated under pressure of from 150-250 psi to 250*-350*F. to cure the resin.
Inventors
- 👤 Kenneth J Denton
- 👤 John C Groot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:45
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/06; F26B25/14; F26B25/18; F26B25/185; F26B2210/00; F26B2210/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
An improved method of kiln-drying wood comprising: providing a wood drying kiln, separating courses of wood stacked in the kiln with kiln stickers of a dimensionally stable, paper-reinforced, thermosetting phenolic resin laminate which is resistant to deterioration under kiln conditions, has high resin content, a high modulus of elasticity and upture and a thickness ranging from 1/4 to 1 inch, and forcing controlled, heated air through the kiln to dry the wood therein, the kiln stickers increasing the drying efficiency and resulting in more uniformly dried wood.
Claim 2
Dependent Claim
87 words
An improved method of kiln-drying wood comprising: providing a wood drying kiln, separating courses of wood stacked in the kiln with kiln stickers of a dimensionally stable, paper-reinforced, thermosetting phenolic resin laminate which is resistant to deterioration under kiln conditions, has high resin content, a high modulus of elasticity and upture and a thickness ranging from 1/4 to 1 inch, and forcing controlled, heated air through the kiln to dry the wood therein, the kiln stickers increasing the drying efficiency and resulting in more uniformly dried wood.
Claim 3
Independent Claim
54 words
A method of using a dimensionally stable, elongated, rectangular paper-reinforced thermosetting phenolic resin laminate of high resin content, high modulus of elasticity and rupture, a thickness ranging from 1/4 to 1 inch and specific gravity greater than one gm./cu.cm. as a kiln sticker for separating courses of lumber stacked in a drying kiln, comprising:
Claim 4
Independent Claim
54 words
A method of using a dimensionally stable, elongated, rectangular paper-reinforced thermosetting phenolic resin laminate of high resin content, high modulus of elasticity and rupture, a thickness ranging from 1/4 to 1 inch and specific gravity greater than one gm./cu.cm. as a kiln sticker for separating courses of lumber stacked in a drying kiln, comprising:
Claim 5
Dependent Claim
35 words
laying said elongated, rectangular, laminated kiln stickers crosswise to and at spaced intervals along the length dimension of the lumber, each kiln sticker having a length at least the width of the course of lumber,
Claim 6
Dependent Claim
35 words
laying said elongated, rectangular, laminated kiln stickers crosswise to and at spaced intervals along the length dimension of the lumber, each kiln sticker having a length at least the width of the course of lumber,
Claim 7
Dependent Claim
24 words
stacking a second course of lumber over the first course, said kiln stickers separating the two courses of lumber to allow air flow therebetween,
Claim 8
Dependent Claim
24 words
stacking a second course of lumber over the first course, said kiln stickers separating the two courses of lumber to allow air flow therebetween,
Claim 9
Dependent Claim
15 words
repeating steps (2) and (3) until a charge of lumber to be dried is obtained,
Claim 10
Dependent Claim
15 words
repeating steps (2) and (3) until a charge of lumber to be dried is obtained,
Claim 11
Dependent Claim
8 words
inserting the charge into a drying kiln, and
Claim 12
Dependent Claim
8 words
inserting the charge into a drying kiln, and
Claim 13
Dependent Claim
63 words
forcing controlled drying air through the kiln and the lumber charge therein to dry the lumber, the kiln stickers, because of their dimensional stability under varying atmospheric moisture content and temperature conditions during the kiln drying cycle, resulting in a more uniform air flow through the kiln, reduction in the number of pieces of lumber to be redried and more uniformly dried lumber.
Claim 14
Dependent Claim
63 words
forcing controlled drying air through the kiln and the lumber charge therein to dry the lumber, the kiln stickers, because of their dimensional stability under varying atmospheric moisture content and temperature conditions during the kiln drying cycle, resulting in a more uniform air flow through the kiln, reduction in the number of pieces of lumber to be redried and more uniformly dried lumber.
References Cited (Backward Citations)
US942150A
Cited
US2388184A
Cited
US2546162A
Cited
US2679111A
Cited
US3090700A
Cited
US3498877A
Cited
US3430357A
Cited
US3770544A
Cited
US3620908A
Cited
US3537951A
Cited
US3616163A
Cited
US3677884A
Cited
US3757428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |