US4403706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic container with hollow internal rib reinforced bottom and method of forming the same
Assignee: Graham Packaging Pet Technologies Inc
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Filing: 1982-06-08
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Granted: 1983-09-13
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Expires: 2002-06-08
Abstract
Abstract This relates to an improvement on a recently developed ribbed preform in a champagne type bottle bottom formed therewith including solid internal ribs. In accordance with this invention, the ribs are made hollow or tubular in the preform with the resultant ribs in the bottle bottom also being hollow. The hollow ribs of the preform serve the same purpose as the prior solid ribs in retaining the plastic material of the preform in the bottom area during the bottle formation and the hollow ribs in the resultant bottle also provide the desired added stiffness for preventing bottom eversion.
Inventors
- 👤 Gautam K. Mahajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:29
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0276; B29; B29C; B29C49/00; B29C49/071; B29C2949/00; B29C2949/07; B29C2949/072; B29C2949/0724; B29C2949/0725; B29C2949/073; B29C2949/0731; B29C2949/074; B29C2949/0746; B29C2949/0747; B29C2949/076; B29C2949/0768; B29C2949/077; B29C2949/0772; B29C2949/0773; B29C2949/0777; B29C2949/078; B29C2949/0861; B29C2949/0872; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
A preform for use in the blow molding formation of a container formed of plastic material and having a generally champagne base, said preform including a tubular body terminating in a rounded bottom, said preform being improved by the addition of circumferentially spaced stiffening ribs extending axially along said body starting at points spaced from but adjacent to said rounded bottom and terminating in said rounded bottom, each of said ribs being tubular and thus hollow.
Claim 2
Dependent Claim
76 words
A preform for use in the blow molding formation of a container formed of plastic material and having a generally champagne base, said preform including a tubular body terminating in a rounded bottom, said preform being improved by the addition of circumferentially spaced stiffening ribs extending axially along said body starting at points spaced from but adjacent to said rounded bottom and terminating in said rounded bottom, each of said ribs being tubular and thus hollow.
Claim 3
Dependent Claim
21 words
A preform according to claim 1 wherein the hollow in each of said ribs is defined by an axially extending bore.
Claim 4
Dependent Claim
28 words
A preform according to claim 1 wherein the hollow in each of said ribs is defined by an axially extending bore opening into the interior of said preform.
Claim 5
Dependent Claim
26 words
A preform according to claim 1 wherein the hollow in each of said ribs is defined by an axially extending bore opening exteriorly of said preform.
Claim 6
Dependent Claim
30 words
A preform according to claim 1 wherein the hollow in each of said ribs is defined by an axially extending bore extending parallel to the general axis of said preform.
Claim 7
Dependent Claim
17 words
A preform according to claim 1 wherein said ribs are disposed in the interior of said preform.
Claim 8
Dependent Claim
17 words
A preform according to claim 1 wherein said ribs are disposed on the exterior of said preform.
Claim 9
Dependent Claim
83 words
A blow molded plastic material beverage bottle having a reversely turned bottom of the champagne type, said bottle including a body terminating at its lower end in a radially inwardly curved upper bottom portion which terminates in turn in a reversely turned annular base portion, and said bottom inwardly of said base portion being inverted and of a generally frustoconical configuration, said bottom being reinforced by radiating ribs disposed internally of said bottle and extending across said base portion, said ribs being tubular.
Claim 10
Dependent Claim
83 words
A blow molded plastic material beverage bottle having a reversely turned bottom of the champagne type, said bottle including a body terminating at its lower end in a radially inwardly curved upper bottom portion which terminates in turn in a reversely turned annular base portion, and said bottom inwardly of said base portion being inverted and of a generally frustoconical configuration, said bottom being reinforced by radiating ribs disposed internally of said bottle and extending across said base portion, said ribs being tubular.
Claim 11
Dependent Claim
14 words
A bottle according to claim 8 wherein said ribs are confined to said bottom.
Claim 12
Dependent Claim
20 words
A bottle according to claim 9 wherein said ribs have inner ends spaced both circumferentially and radially from each other.
Claim 13
Dependent Claim
20 words
A bottle according to claim 8 wherein said ribs have inner ends spaced both circumferentially and radially from each other.
Claim 14
Dependent Claim
64 words
A bottle according to claim 9 wherein the plastic material of said bottle is biaxially oriented and evidencing axial elongation, and wherein said ribs also defining means for restricting axial elongation of the bottom forming portion of the plastic material of said bottle during blow molding wherein there is visual evidence of thinning of said body and a retention of material in said bottom.
Claim 15
Dependent Claim
16 words
A bottle according to claim 8 wherein said ribs are closed at ends of said ribs.
Claim 16
Independent Claim
178 words
A method of forming a blow molded plastic material beverage bottle having a reversely turned bottom of the champagne type, said bottle including a body terminating at its lower end in a radially inwardly curved upper bottom portion which terminates a turn in a reversely turned annular base portion, and said bottom inwardly of said base portion being inverted and of a generally frustoconical configuration, said bottom being reinforced by radiating ribs disposed internally of said bottle and extending across said base portion, said ribs being tubular, said method comprising the steps of providing a plastic material preform of the type including a tubular body terminating in a rounded bottom, said preform being improved by the addition of circumferentially spaced stiffening ribs extending axially along said body starting at points spaced from but adjacent to said rounded bottom and terminating in said rounded bottom, each of said ribs being tubular, placing said preform in a blow mold cavity of a shape defining said bottle, and axially elongating and radially expanding said preform to the contour of said bottle.
Claim 17
Independent Claim
178 words
A method of forming a blow molded plastic material beverage bottle having a reversely turned bottom of the champagne type, said bottle including a body terminating at its lower end in a radially inwardly curved upper bottom portion which terminates a turn in a reversely turned annular base portion, and said bottom inwardly of said base portion being inverted and of a generally frustoconical configuration, said bottom being reinforced by radiating ribs disposed internally of said bottle and extending across said base portion, said ribs being tubular, said method comprising the steps of providing a plastic material preform of the type including a tubular body terminating in a rounded bottom, said preform being improved by the addition of circumferentially spaced stiffening ribs extending axially along said body starting at points spaced from but adjacent to said rounded bottom and terminating in said rounded bottom, each of said ribs being tubular, placing said preform in a blow mold cavity of a shape defining said bottle, and axially elongating and radially expanding said preform to the contour of said bottle.
Claim 18
Dependent Claim
27 words
A method according to claim 14 wherein each rib initially has one open end, and said open end is sealed closed during the forming of said bottle.
Claim 19
Dependent Claim
17 words
A preform according to claim 3 wherein said ribs are disposed in the interior of said preform.
Claim 20
Dependent Claim
17 words
A preform according to claim 4 wherein said ribs are disposed in the interior of said preform.
Claim 21
Dependent Claim
17 words
A preform according to claim 3 wherein said ribs are disposed on the exterior of said preform.
Claim 22
Dependent Claim
17 words
A preform according to claim 4 wherein said ribs are disposed on the exterior of said preform.
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |