US3634182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformed plastic blank for making open mouth plastic containers
Assignee: OI Glass Inc
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Filing: 1969-08-20
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Granted: 1972-01-11
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Expires: 1989-08-20
Abstract
Abstract In apparatus for forming a thermoplastic parison having a rim portion encircling a central portion capable of subsequent deformation, the improvement of mold means contoured to retain thermoplastic material in the rim cavity to control the dimensions of the rim by preventing its shrinking away from the wall of the rim cavity upon cooling. The parison produced by such apparatus has a central bottom wall and a sidewall forming portion and a rim portion joined thereto by a thin web of material.
Inventors
- 👤 Duane O Biglin
- 👤 Jerome R Grothjan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:37
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C51/00; B29C51/02; B29C51/04; B29C2045/2695; B29C51/10; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/256; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24777; Y10T428/24942; Y10T428/2495
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A preformed plastic blank for making open mouth plastic containers, said plastic blank being substantially planar and having a circular planar central portion for forming the bottom wall of the container, said central bottom wall forming portion of said blank being of approximately the thickness of the bottom wall of the finished container, said plastic blank having an annular sidewall forming portion for the container surrounding and integral with the outer periphery of said bottom wall forming portion, said sidewall forming portion being of a thickness greater than the thickness of said bottom wall portion to permit stretching and thinning of the sidewall portion of the blank to generally cup-shaped form, a rim portion radially outwardly of said annular sidewall forming portion and of a cross section and outline of substantially the rim of the finished container and a web portion joining said rim portion to said sidewall forming portion, said web portion being thinner than any part of said sidewall forming portion.
Claim 2
Dependent Claim
163 words
A preformed plastic blank for making open mouth plastic containers, said plastic blank being substantially planar and having a circular planar central portion for forming the bottom wall of the container, said central bottom wall forming portion of said blank being of approximately the thickness of the bottom wall of the finished container, said plastic blank having an annular sidewall forming portion for the container surrounding and integral with the outer periphery of said bottom wall forming portion, said sidewall forming portion being of a thickness greater than the thickness of said bottom wall portion to permit stretching and thinning of the sidewall portion of the blank to generally cup-shaped form, a rim portion radially outwardly of said annular sidewall forming portion and of a cross section and outline of substantially the rim of the finished container and a web portion joining said rim portion to said sidewall forming portion, said web portion being thinner than any part of said sidewall forming portion.
Claim 3
Dependent Claim
28 words
The blank as set forth in claim 1 wherein the thickness of said web portion is less than one-half the thickness of the sidewall forming portion adjacent thereto.
Claim 4
Dependent Claim
19 words
The blank as set forth in claim 1 wherein the thickness of said web portion is approximately 0.030 inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |