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US4599269A
Expired / Lapsed
US
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Foamable plastics granules and packaging material prepared therefrom
Assignee: WiniaDaewoo Co Ltd
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Filing: 1984-12-10
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Granted: 1986-07-08
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Expires: 2004-12-10
Abstract
Abstract The invention relates to plastics granules composed of foamable particles derived from a star-shaped fundamental solid having at least three sides, these particles being a three-dimensionally domed structure by virtue of the sides having paraboloidal curvature, and the surfaces of paraboloidal curvature being staggered in relation to one another. These granule particles preferably have three sides and at least one gap. The invention also relates to a packaging material obtained by foaming the said plastics granules. This packaging material exhibits an improved flow while having at the same time an improved packaging action (good packaging properties and a high void volume).
Inventors
- 👤 Gunter Kohaut
- 👤 Werner Weber
- 👤 Herman Groenendijk
- 👤 Adrianus C. Poppelaars
- 👤 Wilhelmus H. J. Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:29
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/09; C; C08; C08J; C08J9/00; C08J9/16; Y; Y10; Y10S; Y10S206/00; Y10S206/814; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/2982
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
140 words
Plastics granules composed of foamable particles in star shape, wherein the plastics granules are composed predominantly of of particles derived from a star-shaped fundamental solid having three, five or more sides, in the case of three sides the surfaces of two sides being curved relative to one another in a paraboloidal manner, while the surface of the third side has a paraboloidal curvature which is opposed thereto, and, in the case of five or more sides, four sides are each curved relative to one another in a paraboloidal manner, while the surface or surfaces of the remaining side or sides have a paraboloidal curvature which is opposed to the curvature of the four sides, whereby, in each of these cases, a three-dimensionally domed structure is formed and has paraboloidal surfaces of curvature which are staggered in relation to one another.
Claim 2
Dependent Claim
140 words
Plastics granules composed of foamable particles in star shape, wherein the plastics granules are composed predominantly of of particles derived from a star-shaped fundamental solid having three, five or more sides, in the case of three sides the surfaces of two sides being curved relative to one another in a paraboloidal manner, while the surface of the third side has a paraboloidal curvature which is opposed thereto, and, in the case of five or more sides, four sides are each curved relative to one another in a paraboloidal manner, while the surface or surfaces of the remaining side or sides have a paraboloidal curvature which is opposed to the curvature of the four sides, whereby, in each of these cases, a three-dimensionally domed structure is formed and has paraboloidal surfaces of curvature which are staggered in relation to one another.
Claim 3
Dependent Claim
65 words
Plastics granules composed of foamable particles in star shape, wherein the plastics granules are predominantly composed of particles derived from a star-shaped fundamental solid having four sides, all four sides being curved relative to one another in a paraboloidal manner, as a result of which a three-dimensionally domed structure is formed and has paraboloidal surfaces of curvature which are staggered in relation to one another.
Claim 4
Dependent Claim
65 words
Plastics granules composed of foamable particles in star shape, wherein the plastics granules are predominantly composed of particles derived from a star-shaped fundamental solid having four sides, all four sides being curved relative to one another in a paraboloidal manner, as a result of which a three-dimensionally domed structure is formed and has paraboloidal surfaces of curvature which are staggered in relation to one another.
Claim 5
Dependent Claim
16 words
Plastics granules as claimed in claim 1, wherein the foamable particles contain at least one gap.
Claim 6
Dependent Claim
23 words
Plastics granules as claimed in claim 1, wherein at least one of the sides or the center of the particles contains a gap.
Claim 7
Dependent Claim
16 words
Plastics granules as claimed in claim 3, wherein the gap has a round to oval shape.
Claim 8
Dependent Claim
23 words
Plastics granules according to claim 3, wherein the area of the gap is 25% to 75% of the area of the particular side.
Claim 9
Dependent Claim
12 words
Plastics granules as claimed in claim 1, wherein the particles are three-sided.
Claim 10
Dependent Claim
19 words
Plastics granules as claimed in claim 1, wherein the wall thickness of the particles is 1.0 to 2.5 mm.
Claim 11
Dependent Claim
33 words
Plastics granules as claimed in claim 7 wherein one of the sides is 8 to 10 mm, another side is 5 to 7 mm and the third side is 4 to 5 mm.
Claim 12
Dependent Claim
16 words
Plastics granules as claimed in claim 2, wherein the foamable particles contain at least one gap.
Claim 13
Dependent Claim
23 words
Plastics granules as claimed in claim 2, wherein at least one of the sides or the center of the particles contains a gap.
Claim 14
Dependent Claim
16 words
Plastics granules as claimed in claim 10, wherein the gap has a round to oval shape.
Claim 15
Dependent Claim
23 words
Plastics granules according to claim 10, wherein the area of the gap is 25% to 75% of the area of the particular side.
Claim 16
Dependent Claim
23 words
Packaging material composed of foamed plastics particles which are domed and are obtained by foaming the plastics granules as claimed in claim 1.
Claim 17
Dependent Claim
15 words
Packaging material as claimed in claim 14, wherein the particles contain at least one gap.
Claim 18
Dependent Claim
23 words
Packaging material as claimed in claim 14, wherein at least one of the sides or the center of the particles contains a gap.
Claim 19
Dependent Claim
19 words
Packaging material as claimed in claim 14, wherein the wall thickness of the particles is 3 to 6 mm.
Claim 20
Dependent Claim
36 words
Packaging material as claimed in claim 14, wherein the particles are three-sided and one side is 20 to 38 mm, another side is 17 to 30 mm and the third side is 12 to 18 mm.
Claim 21
Dependent Claim
29 words
Packaging material as claimed in claim 14, wherein, when poured in to form a heap of loose material, the void volume of the non-vibrated heap is at least 60%.
Claim 22
Dependent Claim
29 words
Packaging material as claimed in claim 14, wherein the particles are composed of polystyrene and have been foamed by means of a blowing agent which is customary per se.
Claim 23
Dependent Claim
23 words
Packaging material composed of foamed plastics particles which are domed and are obtained by foaming the plastics granules as claimed in claim 2.
Claim 24
Dependent Claim
15 words
Packaging material as claimed in claim 21, wherein the particles contain at least one gap.
Claim 25
Dependent Claim
23 words
Packaging material as claimed in claim 21, wherein at least one of the sides or the center of the particles contains a gap.
Claim 26
Dependent Claim
19 words
Packaging material as claimed in claim 21, wherein the wall thickness of the particles is 3 to 6 mm.
Claim 27
Dependent Claim
29 words
Packaging material as claimed in claim 21, wherein, when poured in to form a heap of loose material, the void volume of the non-vibrated heap is at least 60%.
Claim 28
Dependent Claim
14 words
Plastics granules as claimed in claim 3, wherein the gap has a lenticular shape.
Claim 29
Dependent Claim
14 words
Plastics granules as claimed in claim 10, wherein the gap has a lenticular shape.
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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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |