Patent US4502607A successfully refreshed from Google Patents.
US4502607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulge resistant bottle bottom
Assignee: Continental Plastic Containers LLC
•
Filing: 1983-06-21
•
Granted: 1985-03-05
•
Expires: 2003-06-21
Abstract
Abstract This relates to a bottom construction for a blow molded container wherein a central portion of the bottom is axially inwardly recessed and pushed in and where, in the forming of the central portion, there are two axially offset halves so as to define an upstanding rib. The rib sufficiently reinforces the recessed bottom portion against inversion even when the wall thickness of the bottle or container is reduced.
Inventors
- 👤 John L. Szajna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:08
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0223; B65D1/0261; B65D1/0276; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/4802; B29C49/4817
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A bottom construction of a blow molded plastic container, said bottom construction comprising an outer reversely turned portion and an inner axially recessed portion, said inner portion including opposed halves integrally joined together with said opposed halves being axially offset to define a stepped bottom part having an axial rib extending across said bottom and forming a reinforcement for said inner axially recessed portion to prevent inversion of said inner portion from its axially recessed position.
Claim 2
Dependent Claim
76 words
A bottom construction of a blow molded plastic container, said bottom construction comprising an outer reversely turned portion and an inner axially recessed portion, said inner portion including opposed halves integrally joined together with said opposed halves being axially offset to define a stepped bottom part having an axial rib extending across said bottom and forming a reinforcement for said inner axially recessed portion to prevent inversion of said inner portion from its axially recessed position.
Claim 3
Dependent Claim
19 words
A bottom construction according to claim 1 wherein said bottom construction is elongated in the direction of said rib.
Claim 4
Dependent Claim
32 words
A bottom construction according to claim 1 wherein said axial rib is part of one of said inner portion halves and of a greater thickness than adjacent parts of said one half.
Claim 5
Dependent Claim
40 words
A bottom construction according to claim 1 wherein said axial rib has connected to an axially inner edge of said rib an axially inner portion extending the axial length of said rib and generally at right angles to said rib.
Claim 6
Dependent Claim
18 words
A bottom construction according to claim 4 wherein said axially inner portion is generally rounded in cross section.
Claim 7
Dependent Claim
66 words
A bottom construction according to claim 1 wherein said axial rib is part of one of said inner portion halves, said axial rib has connected to an axially inner edge of said rib an axially inner portion extending the length of said rib and generally at right angles to said rib, and said axially inner portion forms part of the other of said inner portion halves.
Claim 8
Dependent Claim
18 words
A bottom construction according to claim 6 wherein said axially inner portion is generally rounded in cross section.
Claim 9
Dependent Claim
24 words
A bottom construction according to claim 1 wherein there is visual evidence of a preform pinch-off along an axial outer edge of said rib.
Claim 10
Dependent Claim
47 words
A blow molded bottom component, said bottom component having a central bottom defining portion divided into two halves along a longitudinal line, and said two halves being axially offset along said longitudinal line to define a stepped bottom defining surface on opposite sides of said longitudinal line.
Claim 11
Dependent Claim
47 words
A blow molded bottom component, said bottom component having a central bottom defining portion divided into two halves along a longitudinal line, and said two halves being axially offset along said longitudinal line to define a stepped bottom defining surface on opposite sides of said longitudinal line.
Claim 12
Dependent Claim
43 words
A bottom component according to claim 9 wherein an axially innermost of said two halves has along an axial extension of said longitudinal line a longitudinally extending axial surface generally facing the other of said two halves and being axially offset relative thereto.
Claim 13
Dependent Claim
27 words
A bottom component according to claim 9 wherein said bottom component is formed in two halves joined along an axial parting line aligned with said longitudinal line.
Claim 14
Dependent Claim
40 words
A bottom component according to claim 11 wherein said two halves have opposing surfaces on opposite sides of said axial parting line in part defining a cavity for a preform end portion and in part defining a preform pinch-off surface.
Claim 15
Dependent Claim
51 words
A bottom component according to claim 11 wherein said two halves have opposing surfaces on opposite sides of said axial parting line in part defining a cavity for a preform end portion and in part defining a preform pinch-off surface, said preform pinch-off surface being immediately axially adjacent said longitudinal line.
Claim 16
Dependent Claim
44 words
A bottom component according to claim 11 wherein an axially innermost of said two halves has a longitudinally extending axial surface along an axial planar extension of said parting line generally facing the other of said two halves and being axially offset relative thereto.
References Cited (Backward Citations)
US3417892A
Cited
US3520010A
Cited
US3592885A
Cited
US3817676A
Cited
US3865531A
Cited
US4026984A
Cited
US4174782A
Cited
US4231483A
Cited
JPS57160616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |