US4266416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the production of blisters
Assignee: Rio Tinto Switzerland AG
•
Filing: 1979-03-14
•
Granted: 1981-05-12
•
Expires: 1999-03-14
Abstract
Abstract The invention concerns device for the manufacture of blisters with high barrier properties using metal-plastic composite foils which can be deep drawn, in particular an aluminum-plastic composite foil which is clamped firmly in the clamping facility of a device for manufacturing blisters. The process is such that the composite foil is pre-stretched in a first step and then shaped into a blister in a second step.
Inventors
- 👤 Werner Festag
- 👤 Hans-Ueli Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:45
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C51/06; B29C51/14; B29K; B29K2705/00; B29K2705/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A device for the manufacture of blisters using a metal-plastic composite foil which can be deep drawn which comprises a clamping facility having at least one closed chamber therein and having two separable parts between which said metal-plastic composite foil can be clamped in such a way that it is immovably and fixedly held, said clamping facility including means for shaping the foil into a blister, means for pre-stretching said foil into a pendant bubble comprising at least one pipeline communicating with said chamber and fitted with a valve for supplying a fluid medium to said chamber for pre-stretching the foil, wherein said closed chamber is formed together with the foil clamped firmly in the clamping facility, said device including a shaping tool for finally shaping the foil operatively associated with said foil, thereby obtaining improved depth in the finally shaped product.
Claim 2
Independent Claim
142 words
A device for the manufacture of blisters using a metal-plastic composite foil which can be deep drawn which comprises a clamping facility having at least one closed chamber therein and having two separable parts between which said metal-plastic composite foil can be clamped in such a way that it is immovably and fixedly held, said clamping facility including means for shaping the foil into a blister, means for pre-stretching said foil into a pendant bubble comprising at least one pipeline communicating with said chamber and fitted with a valve for supplying a fluid medium to said chamber for pre-stretching the foil, wherein said closed chamber is formed together with the foil clamped firmly in the clamping facility, said device including a shaping tool for finally shaping the foil operatively associated with said foil, thereby obtaining improved depth in the finally shaped product.
Claim 3
Independent Claim
16 words
A device according to claim wherein the clamping facility includes a clamping plate and a die.
Claim 4
Dependent Claim
37 words
A device according to claim 1 wherein the clamping facility includes a clamping plate and a part which has an open chamber opposed to said closed chamber in which a base can be moved up and down.
Claim 5
Dependent Claim
37 words
A device according to claim 2 wherein said shaping tool is a plunger operatively associated with said foil for shaping said foil which moves up and down in trough-shaped recesses in the clamping plate and the die.
Claim 6
Dependent Claim
45 words
A device according to claim 1 wherein a stop operatively associated with said foil, the height of which can be adjusted, is provided to limit the height of the blister during pre-stretching of the foil when pressure is applied to the foil via said medium.
Claim 7
Dependent Claim
87 words
A device according to claim 2 wherein said clamping facility includes an interior portion of said clamping plate and a trough-shaped recess of said die, with said foil clamped therebetween, wherein the lateral dimension of said interior portion is larger than the trough-shaped recess, whereby as a result of such an arrangement of both parts with different lateral dimension, the inner walls of the interior portion are at a lateral distance from the inner walls of the trough-shaped recess, thereby obtaining a large area for said pre-stretching.
Claim 8
Dependent Claim
19 words
A device according to claim 1 wherein said clamping facility includes two chambers, with the foil fixedly held therebetween.
Claim 9
Dependent Claim
20 words
A device according to claim 1 wherein said medium is the sole means for pre-stretching and initially forming said foil.
Claim 10
Dependent Claim
34 words
A device according to claim 7 wherein said means for pre-stretching pre-stretches said foil into a first of said chambers, and said shaping tool finally shapes said foil into a second of said chambers.
References Cited (Backward Citations)
US1625914A
Cited
US3623347A
Cited
US3572071A
Cited
FR2017904A1
Cited
US3769824A
Cited
SU576143A1
Cited
DE2539354A1
Cited
US4045986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |