Patent US4798142B1 successfully refreshed from Google Patents.
US3832115A
Expired / Lapsed
US
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Apparatus for compressing chipboards
Assignee: Mende Wilhelm and Co
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Filing: 1972-05-23
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Granted: 1974-08-27
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Expires: 1992-05-23
Abstract
Abstract Improved apparatus for the production of chipboard wherein the gap width between two heated pressing members at the commencement of the pressing operation is smaller than the thickness of the chipboard to be manufactured.
Inventors
- 👤 H Ettel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
In an apparatus for producing chipboard from a layer of wood chips and binders, said chipboard having a predetermined thickness, said apparatus including a first and second heated pressure member and a steel band, said steel band carrying said layer between said first and second heated pressure members, the improvement comprising means for producing high chip density outer regions and a low chip density intermediate region in said chipboard, said producing means including means for positioning said first heated pressure member relative to said second heated pressure member to initially compress said layer to a thickness less than said predetermined thickness.
Claim 2
Dependent Claim
101 words
In an apparatus for producing chipboard from a layer of wood chips and binders, said chipboard having a predetermined thickness, said apparatus including a first and second heated pressure member and a steel band, said steel band carrying said layer between said first and second heated pressure members, the improvement comprising means for producing high chip density outer regions and a low chip density intermediate region in said chipboard, said producing means including means for positioning said first heated pressure member relative to said second heated pressure member to initially compress said layer to a thickness less than said predetermined thickness.
Claim 3
Dependent Claim
47 words
An improvement as claimed in claim 1 wherein said first heated pressure member is a first pressure cylinder and said second heated pressure member is a second pressure cylinder, said first and second pressure cylinders defining a gap therebetween, said gap being less than said predetermined thickness.
Claim 4
Dependent Claim
59 words
An improvement as claimed in claim 2 wherein said steel band wraps around a portion of said first pressure cylinder to define a second gap between said steel band and said portion of said second pressure cylinder and downstream from said gap between said first and second pressure cylinders, said second gap being substantially equal to said predetermined thickness.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |