Patent US592813A successfully refreshed from Google Patents.
Patent US4060579A successfully refreshed from Google Patents.
US4060579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the continuous forming of foam blocks
Assignee: Maschinenfabrik Hennecke GmbH
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Filing: 1975-02-11
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Granted: 1977-11-29
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Expires: 1995-02-11
Abstract
Abstract Foam blocks are continuously produced on a conveyor belt having lateral boundaries, the application zone for the mixture being adjustable in its inclination, and a feed means for the cover sheet of the conveyor belt being provided before the point at which the mixture is applied.
Inventors
- 👤 Willi Schmitzer
- 👤 Heinz Kisteneich
- 👤 Ferdinand Proksa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:05
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/467; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
A method of continuously producing foam blocks comprising: a. providing an elongated conveying surface divided into a first zone and a second zone i. said first zone being inclined at a downward angle to the horizontal in the direction of the work, ii. said second zone being substantially horizontal and forming a less than 180° angle with said first zone as measured between the top surfaces, and iii. at least said second zone comprises an endless drivable conveyor belt, b. positively feeding a continuous cover sheet to the surface of said first zone, c. continuously depositing a foamable reaction mixture on top of said cover sheet in said first zone, d. maintaining freshly deposited mixture in said first zone for a short enough time that it does not begin to foam substantially, and e. allowing the mixture to foam in said second zone.
Claim 2
Independent Claim
143 words
A method of continuously producing foam blocks comprising: a. providing an elongated conveying surface divided into a first zone and a second zone i. said first zone being inclined at a downward angle to the horizontal in the direction of the work, ii. said second zone being substantially horizontal and forming a less than 180° angle with said first zone as measured between the top surfaces, and iii. at least said second zone comprises an endless drivable conveyor belt, b. positively feeding a continuous cover sheet to the surface of said first zone, c. continuously depositing a foamable reaction mixture on top of said cover sheet in said first zone, d. maintaining freshly deposited mixture in said first zone for a short enough time that it does not begin to foam substantially, and e. allowing the mixture to foam in said second zone.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the angle of inclination of said first zone is adjusted so as to maintain the reaction mixture in the first zone for the desired period of time.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the reaction mixture is partially conveyed through said first zone by the action of an extension of the endless drivable conveyor belt which comprises said second zone.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the reaction mixture is conveyed through said first zone substantially by the force of gravity, said zone being comprised of a plate.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the cover sheet is fed to the first zone by a contact roller.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said contact roller is driven.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein the cover sheet is fed to the first zone by the rolling action of two parallel rollers.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein one of the rollers is driven.
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |