US3577301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of tetrahedral hollow articles
Assignee: Tetra Pak AG
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Filing: 1967-09-28
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Granted: 1971-05-04
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Expires: 1987-09-28
Abstract
Abstract TETRAHEDRAL HOLLOW ARTICLES ARE PRODUCED BY FORMING A TUBE FROM A TRAVELLING WEB AND PASSING THE TUBE THROUGH A RIGID GUIDE MEANS CONTACTING THE TUBE IN AT LEAST TWO DIAMETRICALLY OPPOSITE REGIONS SO AS TO DISPLACE THE POSITION OF UNDERSIRABLE KINKS IN THE ARTICLES FORMED. SUBSEQUENTLY SPACED APART TRANSVERSE SEAMS ARE PROVIDED ACROSS THE TUBE. THE GUIDE MEANS MAY BE A PLATE HAVING A SQUARE OPENING AND A FLEXIBLE SLEEVE OF INELASTIC MATERIAL IS SECURED IN THE SQUARE OPENING. THE TOTAL INTERNAL PERIPHERAL LENGHT OF THE OPENING IS SUBSTANTIALLY EQUAL TO THE CIRCUMFERENCE OF THE TUBE PASSING THROUGH THE OPENING.
Inventors
- 👤 Ake Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:16
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/10; B65B9/20; B65B9/2042; B65B9/2035; B65B9/22; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
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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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |