US3183291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rim shaping apparatus for plastic containers and method
Assignee: Continental Can Co Inc
•
Filing: 1961-07-24
•
Granted: 1965-05-11
•
Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 William L Miller
- 👤 Negoro Kaiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:10
CPC Classifications
B; B29; B29C; B29C57/00; B29C57/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A METHOD OF FINISHING THE RIM PORTION OF A CUP WHICH IS INITIALLY FORMED BY MOLDING A SHEET OF THERMO-PLASTIC MATERIAL TO PROVIDE A CUP BODY HAVING A RELATIVELY NARROW EXTRIOR SKIRT WHICH EXTENDS IN THE DIRECTION OF THE BOTTOM OF THE CUP, WHICH IS OUTWARDLY FLARED AND WHICH IS CONNECTED TO THE TOP OF THE CUP BODY BY A PORTION OF SEMICIRCULAR CROSS SECTION, WHICH METHOD COMPRISES, ENGAGING THE OUTWARDLY FLARED FREE MARGINAL PORTIONS OF THE SKIRT WITH A FIRST HEATED DIE RING SO AS TO FIRST SOFTEN SAID MARGINAL PORTIONS AND THEN SHAPING THE SKIRT INTO A SUBSTANTIALLY CYLINDRICAL SECTION BY MOVING THE DIE RING RELATIVE TO THE SKIRT, AND THEREAFTER CURLING THE CYLINDRICAL SKIRT BY ENGAGING THE FREE MARGINAL PORTIONS THEREOF WITH A CURVED SURFACE ON A SECOND HEATED DIE RING AND MOVING THE SECOND DIE RING RELATIVE TO THE SKIRT SO AS TO PRODUCE A SMOOTH FINISHED BEAD OF ROUNDED CONTOUR ON THE CUP RIM.
Claim 2
Independent Claim
159 words
A METHOD OF FINISHING THE RIM PORTION OF A CUP WHICH IS INITIALLY FORMED BY MOLDING A SHEET OF THERMO-PLASTIC MATERIAL TO PROVIDE A CUP BODY HAVING A RELATIVELY NARROW EXTRIOR SKIRT WHICH EXTENDS IN THE DIRECTION OF THE BOTTOM OF THE CUP, WHICH IS OUTWARDLY FLARED AND WHICH IS CONNECTED TO THE TOP OF THE CUP BODY BY A PORTION OF SEMICIRCULAR CROSS SECTION, WHICH METHOD COMPRISES, ENGAGING THE OUTWARDLY FLARED FREE MARGINAL PORTIONS OF THE SKIRT WITH A FIRST HEATED DIE RING SO AS TO FIRST SOFTEN SAID MARGINAL PORTIONS AND THEN SHAPING THE SKIRT INTO A SUBSTANTIALLY CYLINDRICAL SECTION BY MOVING THE DIE RING RELATIVE TO THE SKIRT, AND THEREAFTER CURLING THE CYLINDRICAL SKIRT BY ENGAGING THE FREE MARGINAL PORTIONS THEREOF WITH A CURVED SURFACE ON A SECOND HEATED DIE RING AND MOVING THE SECOND DIE RING RELATIVE TO THE SKIRT SO AS TO PRODUCE A SMOOTH FINISHED BEAD OF ROUNDED CONTOUR ON THE CUP RIM.
References Cited (Backward Citations)
US488633A
Cited
CA604133A
Cited
US2114596A
Cited
US2218102A
Cited
US2272920A
Cited
US2531540A
Cited
US2541905A
Cited
US2725597A
Cited
US2973558A
Cited
US3096546A
Cited
US2985914A
Cited
US2967328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |