US3710541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resin seamless tetrahedron
Assignee: Individual
•
Filing: 1970-12-22
•
Granted: 1973-01-16
•
Expires: 1990-12-22
Abstract
Abstract An improved container of tetrahedral shape comprising a seamless tube of thermoplastic material having the opposite ends thereof sealed in straight lines in crosswise directions relative to one another; and the method of cutting, forming, expanding, filling and sealing such tubular material with novel material handling techniques to provide filled containers of tetrahedral shape.
Inventors
- 👤 S Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/40; B65D75/44; B65D75/48; B65D75/50; B65B; B65B3/00; B65B3/02; B65B9/00; B65B9/10; B65B9/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
217 words
A method of forming and filling containers comprising the steps of gripping the leading edge of a continuous flattened seamless tube of flexible synthetic resin thermoplastic material and withdrawing it in a horizontal plane from a supply station and pulling a section of the material of a predetermined length past a cutting station, cutting the section of predetermined length and completely heat sealing the trailing end of the section while maintaining the gripping engagement with the leading end, continuing the movement of the section in a horizontal plane and while continuing the gripping engagement with the leading end opening the leading end and separating the inside surfaces of the section, releasing the gripping contact on the section and displacing the section from the horizontal plane into a vertical orientation with its open leading end facing upwardly and its sealed trailing end directed downwardly, moving the vertically oriented section into a loading station and filling the section through its open leading end with a pourable substance, withdrawing the filled section from the loading station and completely heat sealing the leading end of the filled section so that the sealed leading end lies in a plane extending transversely of the plane containing the sealed trailing end of the section and thereby providing the filled section with a tetrahedral shape.
Claim 2
Independent Claim
217 words
A method of forming and filling containers comprising the steps of gripping the leading edge of a continuous flattened seamless tube of flexible synthetic resin thermoplastic material and withdrawing it in a horizontal plane from a supply station and pulling a section of the material of a predetermined length past a cutting station, cutting the section of predetermined length and completely heat sealing the trailing end of the section while maintaining the gripping engagement with the leading end, continuing the movement of the section in a horizontal plane and while continuing the gripping engagement with the leading end opening the leading end and separating the inside surfaces of the section, releasing the gripping contact on the section and displacing the section from the horizontal plane into a vertical orientation with its open leading end facing upwardly and its sealed trailing end directed downwardly, moving the vertically oriented section into a loading station and filling the section through its open leading end with a pourable substance, withdrawing the filled section from the loading station and completely heat sealing the leading end of the filled section so that the sealed leading end lies in a plane extending transversely of the plane containing the sealed trailing end of the section and thereby providing the filled section with a tetrahedral shape.
Claim 3
Dependent Claim
47 words
A method as set forth in claim 1, characterized therein by providing an adhesive action for gripping the leading end of the material. 3. A method, as set forth in claim 1, characterized therein by providing a suction action for gripping the leading end of the material.
Claim 4
Dependent Claim
34 words
A method, as set forth in claim 1, characterized therein by sterilizing the interior of the cut section after the sealing of its trailing end and prior to the commencement of the filling step.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |