US3799389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging container with tear-open thread
Assignee: Rio Tinto Switzerland AG
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Filing: 1972-11-14
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Granted: 1974-03-26
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Expires: 1992-11-14
Abstract
Abstract A container comprising a body and lid heat-sealed together by means of a thermoplastic resin coating. In order to open the container, the seal is broken by means of a tear-open thread placed inwardly of the sealing area, the ends of which thread emerge from the container traversing the seal and are impregnated with an oil, e.g. mineral, vegetable or animal oil, moistening the sealing layers, in order to prevent bacteria from infiltrating the inside of the container along the tear-open thread thus contaminating the contents of the container.
Inventors
- 👤 S Bloeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/42; B65D17/46; B65D17/462
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
In a container having a body for receiving filling goods, a rim in the body bent to form a sealing flange, a lid having a rim adapted for obtaining a seal with the sealing flange, and a threaded tear-open thread arranged inwardly of the seal and within the container, the ends of the thread being let out of the container between the sealing flange and the lid, the improvement comprising an oil for impregnating at least a portion of the thread to prevent bacteria infiltration into the container along the thread.
Claim 2
Dependent Claim
91 words
In a container having a body for receiving filling goods, a rim in the body bent to form a sealing flange, a lid having a rim adapted for obtaining a seal with the sealing flange, and a threaded tear-open thread arranged inwardly of the seal and within the container, the ends of the thread being let out of the container between the sealing flange and the lid, the improvement comprising an oil for impregnating at least a portion of the thread to prevent bacteria infiltration into the container along the thread.
Claim 3
Dependent Claim
14 words
The container as claimed in claim 1, wherein the oil is a paraffin oil.
Claim 4
Dependent Claim
14 words
The container as claimed in claim 1, wherein the oil is a vegetable oil.
Claim 5
Dependent Claim
14 words
The container as claimed in claim 1, wherein the oil is an animal oil.
Claim 6
Dependent Claim
29 words
The container as claimed in claim 1, wherein the thread is impregnated with the oil only in the vicinity of the seal between the sealing flange and the lid.
Claim 7
Dependent Claim
26 words
The container as claimed in claim 1, wherein the thread is impregnated with the oil only beyond the seal between the sealing flange and the lid.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |