Patent US3712112A successfully refreshed from Google Patents.
US3712112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the testing of seams of foil or sheet sealed containers
Assignee: Rio Tinto Switzerland AG
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Filing: 1971-05-17
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Granted: 1973-01-23
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Expires: 1991-05-17
Abstract
Abstract A device for the testing of seams of lightweight containers sealed with foil or sheet, the device being especially adapted for testing of the seams. The device comprises a supporting means to support the container except for the seam zone and means to introduce a pressure medium into the container and to increase the pressure thereof until either the seam bursts or a pre-set test pressure is reached.
Inventors
- 👤 K Widmer
- 👤 H Zumsteg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:27
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/06; G01M3/10; G01M3/08; G01M3/088
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
Device for the testing of seams of containers sealed with foil or sheet, comprising outer supporting means intended to support all parts of the container with the exception of the seam zone thereof, and by means intended to introduce a pressure medium into the container and increase the pressure thereof until either the seam fails or a pre-set pressure is reached.
Claim 2
Dependent Claim
61 words
Device for the testing of seams of containers sealed with foil or sheet, comprising outer supporting means intended to support all parts of the container with the exception of the seam zone thereof, and by means intended to introduce a pressure medium into the container and increase the pressure thereof until either the seam fails or a pre-set pressure is reached.
Claim 3
Dependent Claim
94 words
Device according to claim 1, comprising a die against which the bottom and the sides of the container can rest, and that a hollow needle projects from the bottom of the die into the hollow space provided for receiving the container, and that a seal is arranged around the hollow needle on the bottom of the die, the arrangement being such that when the container is placed in position in the die, the hollow needle pierces the container bottom and the seal seals off the clearance between the hollow needle and the container bottom.
Claim 4
Dependent Claim
29 words
Device according to claim 1, wherein the top of the container is supported within the seam zone, the supporting means being designed to depress the container into the die.
Claim 5
Dependent Claim
32 words
Device according to claim 1 wherein the supporting means for the container top consists of a cover which is movably suspended near its middle and which is lockable by a lever-operated cam.
Claim 6
Dependent Claim
19 words
Device according to claim 1, wherein the supporting means comprises a cover having escape grooves for escaping test medium.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |