US4785950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic bottle base reinforcement
Assignee: Graham Packaging Pet Technologies Inc
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Filing: 1986-03-12
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Granted: 1988-11-22
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Expires: 2006-03-12
Abstract
Abstract This relates to the strengthening of the base of a blow molded plastic bottle and like container wherein the container base is of the type having generally hemispherical portions alternating circumferentially with projecting feet defining portions. It has been found that by roughening the surface of the base, particularly the lower central portion thereof, the base is greatly strengthened. The base is formed by blow molding in a blow mold base portion which has been roughened by shot peening.
Inventors
- 👤 Bryan H. Miller
- 👤 Lawrence G. Jerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:35
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0284
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A blow molded plastic container for packaging products under pressure, said container having a base including generally hemispherical portions disposed in circumferential alternating relation with projecting feet defining portions, said base having a roughened external surface defining means for effecting dispersal of surface energy due to internal pressures.
Claim 2
Dependent Claim
48 words
A blow molded plastic container for packaging products under pressure, said container having a base including generally hemispherical portions disposed in circumferential alternating relation with projecting feet defining portions, said base having a roughened external surface defining means for effecting dispersal of surface energy due to internal pressures.
Claim 3
Dependent Claim
15 words
A container according to claim 1 wherein said roughened external surface is a molded surface.
Claim 4
Dependent Claim
21 words
A container according to claim 1 wherein said roughened external surface is restricted to a lower central portion of said base.
Claim 5
Dependent Claim
16 words
A container according to claim 1 wherein said roughened external surface is free of external flaws.
Claim 6
Dependent Claim
18 words
A container according to claim 1 wherein said roughened external surface is complemental to a shot peened surface.
Claim 7
Dependent Claim
18 words
A container according to claim 3 wherein said roughened external surface is complemental to a shot peened surface.
Claim 8
Dependent Claim
15 words
A container according to claim 3 wherein said roughened external surface is a molded surface.
Claim 9
Dependent Claim
22 words
A container according to claim 3 wherein said roughened external surface is a molded surface complemental to a shot peened molding surface.
Claim 10
Dependent Claim
16 words
A container according to claim 3 wherein said roughened external surface is free of external flaws.
Claim 11
Dependent Claim
22 words
A container according to claim 1 wherein said roughened external surface is a molded surface complemental to a shot peened molding surface.
References Cited (Backward Citations)
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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) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |