Patent US3234310A successfully refreshed from Google Patents.
US3234310A
Expired / Lapsed
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Method for producing thin wall, indented bottom thermoplastic containers
Assignee: Illinois Tool Works Inc
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Filing: 1962-02-23
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Granted: 1966-02-08
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Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 Edwards Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; B29C51/343; B29C51/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF FORMING A CONTAINER FROM RELATIELY THIN HEATED THERMOPLASTIC SHEET MATERIAL INCLUDING THE STEPS OF MECHANICALLY DRAWING THE MATERIAL WITH A MANDREL, INTRODUCING A FLUID PRESSURE DIFFERENTIAL ACROSS THE SHEET MATERIAL TO EXPAND THE MECHANICALLY DRAWN MATERIAL INTO ENGAGEMENT WITH A CHILLED OPEN BOTTOMED MOD CAVITY TO PREFORM A CONTAINER HAVING COOLED SIDE WALLS, A BOTTOM PORTION AT A SUBSTANTIALLY GREATER TEMPERATURE THAN THE COOLED SIDE WALLS AND AN OPEN END PORTION, AND THEN QUICKLY MOVING THE BOTTOM PROTION OF THE PREFORMED CONTAINER WHICH TRAVERSES ALL BUT A SMALL PERIPHERAL AREA BETWEEN THE COOLED SIDE WALL PORTIONS OF THE CONTAINER TOWEARD THE OPEN END THEREOF IN A MANNER TO CAUSE A PORTION OF THE SIDE WALLS TO BE FOLDED FROM A FIRST POSITION TO A GENERALLY OPPOSED POSITION FOR ADHERENCE TO OTHER PORTIONS OF THE SIDE WALLS TO FORM A FALSE BOTTOM CONTAINER.
Claim 2
Independent Claim
145 words
THE METHOD OF FORMING A CONTAINER FROM RELATIELY THIN HEATED THERMOPLASTIC SHEET MATERIAL INCLUDING THE STEPS OF MECHANICALLY DRAWING THE MATERIAL WITH A MANDREL, INTRODUCING A FLUID PRESSURE DIFFERENTIAL ACROSS THE SHEET MATERIAL TO EXPAND THE MECHANICALLY DRAWN MATERIAL INTO ENGAGEMENT WITH A CHILLED OPEN BOTTOMED MOD CAVITY TO PREFORM A CONTAINER HAVING COOLED SIDE WALLS, A BOTTOM PORTION AT A SUBSTANTIALLY GREATER TEMPERATURE THAN THE COOLED SIDE WALLS AND AN OPEN END PORTION, AND THEN QUICKLY MOVING THE BOTTOM PROTION OF THE PREFORMED CONTAINER WHICH TRAVERSES ALL BUT A SMALL PERIPHERAL AREA BETWEEN THE COOLED SIDE WALL PORTIONS OF THE CONTAINER TOWEARD THE OPEN END THEREOF IN A MANNER TO CAUSE A PORTION OF THE SIDE WALLS TO BE FOLDED FROM A FIRST POSITION TO A GENERALLY OPPOSED POSITION FOR ADHERENCE TO OTHER PORTIONS OF THE SIDE WALLS TO FORM A FALSE BOTTOM CONTAINER.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |