Patent US3762028A successfully refreshed from Google Patents.
US3762028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joining of plastic/metal foil laminates
Assignee: Dow Chemical Co
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Filing: 1972-02-25
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Granted: 1973-10-02
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Expires: 1992-02-25
Abstract
Abstract Plastic/metal foil laminates are joined by removing a portion of the plastic of the laminate by means of a wire brush applied within a critical range of surface speeds to remove a window of the plastic surface and two adjacent metal surfaces are joined together by conventional welding means.
Inventors
- 👤 C Swearingen
- 👤 N Sheptak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:25
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B23; B23K; B23K11/00; B23K11/16; B23K11/163
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
A method for the joining of first and second plastic/metal laminates wherein a portion of a plastic layer is removed from at least one of the laminates and the laminates joined in metal-tometal contact wherein at least one of the metal surfaces to be joined has had a plastic coating thereon, the steps of the method comprising contacting at least one plastic layer surface of the plastic first laminate with a rapidly rotating impacting and shearing means for a time sufficient to remove plastic material and cause the surface of the metal underlying the removed plastic material to achieve a grainy appearance, the shearing and impact means having a plurality of impacting bristles generally radially disposed about a rotating shaft and having an unsupported length to diameter ratio of at least about 20:1, the terminal portion of the bristles remote from the rotating shaft having a surface speed of at least 3000 feet per minute, thereby removing a desired portion of the plastic layer, and subsequently joining the exposed metal surface of the first laminate to the metal layer of the second laminate and heat sealing at least two plastic layers together.
Claim 2
Independent Claim
192 words
A method for the joining of first and second plastic/metal laminates wherein a portion of a plastic layer is removed from at least one of the laminates and the laminates joined in metal-tometal contact wherein at least one of the metal surfaces to be joined has had a plastic coating thereon, the steps of the method comprising contacting at least one plastic layer surface of the plastic first laminate with a rapidly rotating impacting and shearing means for a time sufficient to remove plastic material and cause the surface of the metal underlying the removed plastic material to achieve a grainy appearance, the shearing and impact means having a plurality of impacting bristles generally radially disposed about a rotating shaft and having an unsupported length to diameter ratio of at least about 20:1, the terminal portion of the bristles remote from the rotating shaft having a surface speed of at least 3000 feet per minute, thereby removing a desired portion of the plastic layer, and subsequently joining the exposed metal surface of the first laminate to the metal layer of the second laminate and heat sealing at least two plastic layers together.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein two generally identical plastic/metal laminates are joined.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the laminates are joined by cold welding.
Claim 5
Dependent Claim
22 words
The method of claim 1 including the step of removing a window in the plastic layer of the laminates to be joined.
Claim 6
Dependent Claim
23 words
The method of claim 4 including the step of heat sealing a plastic film over any adjacent exposed portions of the metal layers.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |