Patent US2380894A successfully refreshed from Google Patents.
US3967005A
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Method for enveloping pellets of foamed poly-styrene suitable for producing lightened manufactured articles of cement
Assignee: BASLER BRUNO AS LEGAL REPRESENTATIVE OF ISOREN ANSTALT (SCHAAN (LIECHTENSTEIN)
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Filing: 1974-12-11
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Granted: 1976-06-29
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Expires: 1994-12-11
Abstract
Abstract Method and related means for enveloping pellets of foamed polystyrene suitable for producing lightened manufactured articles of cement, wherein the pellets are introduced into a mixing unit at a first station thereof and then passed to a station for water and synthetic resin introduction, and next to a third station in said mixing unit where an inert filler is introduced, then reaching a heating zone for drying and polymerizing the enveloped pellets, said processing steps being carried out in a continuous succession.
Inventors
- 👤 Mario Cattaneo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/80; B29B7/88; B29B7/94; B29B7/945; B01; B01F; B01F27/00; B01F27/60; B01F27/62; B01F27/80; B01F27/90; B01F27/906; B01F35/00; B01F35/71; B01F35/711; B01F35/714; B01F35/715; B01F35/717; B01F35/7176; B01F35/7179; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/58; B29B7/60; B29B7/603; B29B7/82; B29B7/826; B29B9/00; B29B9/16; C; C04; C04B; C04B20/00; C04B20/10; C04B20/12; B01F23/00; B01F23/50; B01F23/565; B01F33/00; B01F33/80; B01F33/836; B01F33/8363; B29B2009/163; B29K; B29K2105/00; B29K2105/04; B29K2105/048; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
A method for enveloping foamed polystyrene pellets suitable for producing lightened manufactured articles of cement, the method substantially comprising the continuous steps of: introducing a stream of foamed polystyrene pellets into a mixing unit; feeding the pellets to a first station of said unit; continuously introducing at said first station a proportioned amount of water and water dispersible synthetic resins; feeding the so wetted pellets to a second station of said unit; continuously introducing at said second station an inert filler in a proportioned amount; feeding all of the material to a third station of said unit; presenting an obstacle to the progression of material in said unit to cause momentary accumulation of said material at a drying and polymerization zone; applying heat to the accumulated material at said zone to enhance drying and polymerization of said material; and thereafter delivering said material to an outlet of said unit.
Claim 2
Independent Claim
149 words
A method for enveloping foamed polystyrene pellets suitable for producing lightened manufactured articles of cement, the method substantially comprising the continuous steps of: introducing a stream of foamed polystyrene pellets into a mixing unit; feeding the pellets to a first station of said unit; continuously introducing at said first station a proportioned amount of water and water dispersible synthetic resins; feeding the so wetted pellets to a second station of said unit; continuously introducing at said second station an inert filler in a proportioned amount; feeding all of the material to a third station of said unit; presenting an obstacle to the progression of material in said unit to cause momentary accumulation of said material at a drying and polymerization zone; applying heat to the accumulated material at said zone to enhance drying and polymerization of said material; and thereafter delivering said material to an outlet of said unit.
Claim 3
Dependent Claim
32 words
A method as set forth in claim 1, wherein the pellets are first enveloped with a water dispersion of said resins, a proportioned amount of said inert filler being subsequently added thereto.
Claim 4
Dependent Claim
14 words
A method as set forth in claim 1, wherein said resins comprise vinyl resins.
Claim 5
Dependent Claim
28 words
A method as set forth in claim 3, wherein said water-dispersed vinyl resins are added with a complexing synthetic reactant to aid in dispersing the resins in water.
Claim 6
Dependent Claim
65 words
A method as set forth in claim 1, wherein the introduction of said foamed polystyrene pellets, mixture of water and resins, and inert filler is accomplished in a tubular mixing unit at separate stations thereof, the introduction for the mixture of water and resins, as well as the inert filler being carried out transversely of the feeding direction of said material in the mixing unit.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |