Patent US2439743A successfully refreshed from Google Patents.
Patent US4200700A successfully refreshed from Google Patents.
US4200700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of after-foaming a mixture of a foam and a resin solution
Assignee: IDC System AG
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Filing: 1978-05-12
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Granted: 1980-04-29
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Expires: 1998-05-12
Abstract
Abstract A method of after-foaming a mixture containing a foam and a resin solution. The foam component is brought into contact with the resin solution by means of a suction action. The after-foaming is produced due to said suction action and by superfluous air present.
Inventors
- 👤 Karl Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:26
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/30; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10S521/917
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A method of after-foaming a mixture containing a foam and a urea-formaldehyde resin solution, wherein the foam component is brought into contact with the resin component by means of a suction action, comprising directing said resin solution to a mixing chamber through an inner pipe and simultaneously directing a foam to said chamber through a concentric space defined by an outer pipe and said inner pipe, whereby an after-foaming is produced by means of the vacuum produced by said suction action and by superfluous gas present.
Claim 2
Independent Claim
86 words
A method of after-foaming a mixture containing a foam and a urea-formaldehyde resin solution, wherein the foam component is brought into contact with the resin component by means of a suction action, comprising directing said resin solution to a mixing chamber through an inner pipe and simultaneously directing a foam to said chamber through a concentric space defined by an outer pipe and said inner pipe, whereby an after-foaming is produced by means of the vacuum produced by said suction action and by superfluous gas present.
Claim 3
Dependent Claim
22 words
The method as defined in claim 1, wherein the foam component contains a hardener agent necessary for the polymerization of said resin.
Claim 4
Dependent Claim
26 words
The method as defined in claim 1, wherein the base materials as well as the produced mixture are guided continuously in form of a pipe flow.
Claim 5
Dependent Claim
23 words
The method as defined in claim 3, wherein said resin component is guided in such a flow that said foam component is aspirated.
Claim 6
Dependent Claim
41 words
The method as defined in claim 4, wherein a flowing layer is produced by means of said resin component, which layer extends across the complete cross-section of said flow and produces said vacuum necessary for said aspiration of said foam component.
Claim 7
Dependent Claim
86 words
The method as defined in claim 5, whereby said resin component is fed in by means of an inner pipe and said foam solution is fed in by means of an outer pipe, whereafter a flowing layer in the shape of a cone if produced with said resin component, the apex of which is arranged at the end of said pipe for infeed of said resin component and the surface of which extends across the complete cross-sectional area of the pipe flow of the mixture produced.
Claim 8
Dependent Claim
25 words
The method as defined in claim 1, wherein said superfluous gas present at said after-foaming is superfluous air being aspirated together with said foam component.
Claim 9
Dependent Claim
16 words
The method as defined in claim 1, wherein said resin component is a water-soluble urea-formaldehyde resin.
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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |