US3190946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming method
Assignee: Kirkhof Manufacturing Corp
•
Filing: 1964-03-13
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Granted: 1965-06-22
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Expires: 1984-03-13
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:55
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; B29C51/10; B29C51/32; B29C51/325; B29C51/44; B29C51/445; Y; Y10; Y10S; Y10S425/00; Y10S425/039; Y10S425/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF REPEATEDLY FORMING PLASTIC SHELL TYPE ARTICLES FROM A THIN, GENERALLY CONTINUOUS FLEXIBLE SHEET OF PLASTIC COMPRISING THE STEPS OF: PLACING SUCCESSIVE PORTIONS OF A GENERALLY CONTINUOUS SHEET OF PLASTIC ADJACENT A DIE FORMING MEANS ONE PORTION AT A TIME; PRESSING A BLADE INTO SEALING CONTACT WITH EACH SHEET PORTION AROUND THE PERIPHERY OF SAID DIE AND THEREBY SEALING SAID SHEET PORTION TO SAID SURFACE; HEATING SAID SHEET PORTION AND APPLYING A PRESSURE DIFFERENTIAL THERETO FORCE IT AGAINST SAID FORMING MEANS AND THE SIDE OF SAID BLADE AND THEREBY FORM A RELATIVELY RIGID THREE DIMENSIONAL CONFIGURATED ARTICLE IN SAID PORTION; SUBSEQUENTLY APPLYING INCREASED PRESSURE TO SAID BLADE TO THEN SUBSTANTIALLY PENETRATE AND CREASE SAID SHEET PORTION AROUND THE PERIPHERY OF SAID ARTICLE WITHOUT
Claim 2
Independent Claim
125 words
THE METHOD OF REPEATEDLY FORMING PLASTIC SHELL TYPE ARTICLES FROM A THIN, GENERALLY CONTINUOUS FLEXIBLE SHEET OF PLASTIC COMPRISING THE STEPS OF: PLACING SUCCESSIVE PORTIONS OF A GENERALLY CONTINUOUS SHEET OF PLASTIC ADJACENT A DIE FORMING MEANS ONE PORTION AT A TIME; PRESSING A BLADE INTO SEALING CONTACT WITH EACH SHEET PORTION AROUND THE PERIPHERY OF SAID DIE AND THEREBY SEALING SAID SHEET PORTION TO SAID SURFACE; HEATING SAID SHEET PORTION AND APPLYING A PRESSURE DIFFERENTIAL THERETO FORCE IT AGAINST SAID FORMING MEANS AND THE SIDE OF SAID BLADE AND THEREBY FORM A RELATIVELY RIGID THREE DIMENSIONAL CONFIGURATED ARTICLE IN SAID PORTION; SUBSEQUENTLY APPLYING INCREASED PRESSURE TO SAID BLADE TO THEN SUBSTANTIALLY PENETRATE AND CREASE SAID SHEET PORTION AROUND THE PERIPHERY OF SAID ARTICLE WITHOUT
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |