US4910054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic preform having reinforced container base forming portion and container formed therefrom
Assignee: Graham Packaging Pet Technologies Inc
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Filing: 1988-12-01
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Granted: 1990-03-20
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Expires: 2008-12-01
Abstract
Abstract A blown plastic container of a type normally blown from a single resin preform, such as PET, wherein the bases of a three layer construction with at least one layer either being PET having a high IV or a resin which has a high Tg. The secondary resin may either be in the form of a core layer injected into the base of the injection molded preform or in the form of initially injected inner and outer base layers. By utilizing a small amount of the second resin, greater strength can be obtained together with a greater resistance to cracking at higher temperatures as well as the reduction in the overall weight of the resultant container.
Inventors
- 👤 Wayne N. Collette
- 👤 Suppayan M. Krishnakumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B65D1/0215; B32; B32B; B32B27/00; B29; B29C; B29C45/00; B29C45/16; B29C45/1642; B29C45/1646; B29C2045/1654; B29C2949/00; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/30; B29C2949/3016; B29C2949/3018; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29K; B29K2105/00; B29K2105/25; B29K2105/253; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
An injection molded plastic preform for the blow molding of a container, said preform including a neck finish portion, a body forming portion and a base forming portion, said neck finish portion and said body forming portion being formed of a single layer and at least part of said base forming portion being formed of three layers, said three layers including inner and outer layers and a core, said inner and outer layers being formed of the same first material, and said core being separately injected and formed of a second and different material, and said single layer portions being formed of the same material as that from which a selective one of said inner and outer layers and core is formed.
Claim 2
Dependent Claim
122 words
An injection molded plastic preform for the blow molding of a container, said preform including a neck finish portion, a body forming portion and a base forming portion, said neck finish portion and said body forming portion being formed of a single layer and at least part of said base forming portion being formed of three layers, said three layers including inner and outer layers and a core, said inner and outer layers being formed of the same first material, and said core being separately injected and formed of a second and different material, and said single layer portions being formed of the same material as that from which a selective one of said inner and outer layers and core is formed.
Claim 3
Dependent Claim
22 words
A plastic preform according to claim 1 wherein one of said materials has materially different characteristics from the other of said materials.
Claim 4
Dependent Claim
16 words
A plastic preform according to claim 2 wherein said materials are both of the same resin.
Claim 5
Dependent Claim
29 words
A plastic preform according to claim 2 wherein said materials are both formed of the same resin with said one material having a higher intrinsic viscosity than the other.
Claim 6
Dependent Claim
20 words
A plastic preform according to claim 2 wherein said one of said materials has a higher Tg than the other.
Claim 7
Dependent Claim
38 words
A plastic preform according to claim 2 wherein said one of said materials forms said core, and the other of said materials forms said single layer neck finish and body forming portions and said inner and outer layers.
Claim 8
Dependent Claim
38 words
A plastic preform according to claim 2 wherein said one of said materials forms said inner and outer layers, and the other of said materials forms and single layer neck finish and body forming portions and said core.
Claim 9
Dependent Claim
36 words
A plastic preform according to claim 3 wherein said one material forms said core, and the other of said material forms said single layer neck finish and body forming portions and said inner and outer layers.
Claim 10
Dependent Claim
38 words
A plastic preform according to claim 3 wherein said one of said materials forms said inner and outer layers, and the other of said materials forms said single layer neck finish and body forming portions and said core.
Claim 11
Dependent Claim
12 words
A blow molded plastic container formed from the preform of claim 1.
Claim 12
Dependent Claim
17 words
A blow molded plastic container according to claim 10 wherein said container has a multiple leg base.
References Cited (Backward Citations)
JPS5577532A
Cited
US4535901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |