US3586084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic blank for making a container
Assignee: Individual
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Filing: 1969-12-05
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Granted: 1971-06-22
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Expires: 1989-12-05
Abstract
Abstract This invention relates to the production of hollow plastic articles from a novel plastic blank having a central portion surrounded by at least one corrugation wherein the wall thickness of the blank is accurately controlled or programmed, and to novel methods for extending and expanding such a blank into the shape of the desired container by applying a deforming force to extend the blank to produce a hollow article having substantially the height desired for the final container, and, thereafter, applying heat and pressure to expand the extended blank laterally to produce the final shape of the desired container.
Inventors
- 👤 Sanford Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:01
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/071; B65; B65D; B65D1/00; B65D1/40; B29C2949/00; B29C2949/07; B29C2949/072; B29C2949/0725; B29C2949/073; B29C2949/076; B29C2949/0761; B29C2949/0768; B29C2949/077; B29C2949/0772; B29C2949/0776; B29C2949/078
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
In a plastic blank having a controlled wall thickness for use in the manufacture of a hollow plastic container having predetermined desired dimensions and a desired configuration, said blank comprising: a central portion surrounded by at least two corrugations, each of said corrugations extending circumferentially around said central portion and being spaced from the other corrugations, the minimum cross-sectional material thickness of said corrugations at the periphery of said blank being substantially equal to the predetermined wall thickness dimension of the container to be produced from said blank the cross-sectional thickness of said corrugations increasing from said minimum thickness to a maximum thickness where the intermost of said corrugations joins said central portion whereby the container formed upon extension and expansion of said corrugations has a relatively constant wall thickness throughout.
Claim 2
Dependent Claim
131 words
In a plastic blank having a controlled wall thickness for use in the manufacture of a hollow plastic container having predetermined desired dimensions and a desired configuration, said blank comprising: a central portion surrounded by at least two corrugations, each of said corrugations extending circumferentially around said central portion and being spaced from the other corrugations, the minimum cross-sectional material thickness of said corrugations at the periphery of said blank being substantially equal to the predetermined wall thickness dimension of the container to be produced from said blank the cross-sectional thickness of said corrugations increasing from said minimum thickness to a maximum thickness where the intermost of said corrugations joins said central portion whereby the container formed upon extension and expansion of said corrugations has a relatively constant wall thickness throughout.
Claim 3
Dependent Claim
26 words
The plastic blank of claim 1, wherein the thickness of the central portion is greater than the thickness dimension of any other section of said blank.
Claim 4
Dependent Claim
43 words
The plastic blank of claim 1, in which the number of corrugations and the height of said corrugations of said blank are such that the linear measure of the corrugations substantially equals the height of the container to be formed from said blank.
Claim 5
Dependent Claim
23 words
The plastic blank of claim 1, in which the corrugations farthest removed from said central portion terminates in a rim encircling said blank.
Claim 6
Dependent Claim
19 words
The plastic blank of claim 1, in which the central portion is raised from the base of said blank.
Claim 7
Dependent Claim
30 words
The plastic blank of claim 1, in which the relationship of the central portion to the surrounding corrugations is such that one blank may nest on a similarly configured blank.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |