US3915779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for effecting vacuum evaporation
Assignee: Kureha Corp
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Filing: 1974-07-10
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Granted: 1975-10-28
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Expires: 1994-07-10
Abstract
Abstract A method for effecting vacuum evaporation onto extremely thin and whippy thermoplastic films. In the method, a laminated film is prepared consisting of a first layer of a film to be metallized and a second layer of a base film. The laminated film is subjected to elongation at least uniactially at a temperature below the melting points and above the second degree transition points of the materials of the two films. The laminated film thus elongated is then processed by conventional vacuum evaporation.
Inventors
- 👤 Shinsuke Yoshikawa
- 👤 Tohru Sasaki
- 👤 Syuji Terasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:08
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B43/00; B32B43/006; B32B38/00; B32B38/0012; B32B2038/0028; B32B2038/0052; B32B2038/0092; B32B2250/00; B32B2250/02; B32B2250/24; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2327/00; B32B2327/12; B32B2398/00; B32B2398/20; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; H05K3/00; H05K3/0058; H05K3/10; H05K3/14; H05K3/146; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A METHOD FOR EFFECTING VACCUM EVAPORATION ONTO BOTH SURFACES OF A FILM COMPRISING FORMING A LAMINATED FILM CONSISTING OF A FIRST FILM TO BE TREATED AND A SECOND FILM WHICH SERVES AS A BASE FILM BEING OF A THICKNESS AT LEAST EQUAL TO THAT OF THE FIRST FILM, SAID FIRST AND SAID SECOND FILMS BEING NOT SUBJECTED TO ELONGATION PRIOR TO THE LAMINATION, ELONGATING THE LAMINATED FILM AT LEAST UNIAXIALLY AT A TEMPERATURE BELOW THE MELTING POINTS OF THE MATERIALS OF THE TWO FILMS AND ABOVE THE SECOND ORDER TRANSITION POINTS OF THE TWO MATERIALS, SUBJECTING THUS ELONGATED LAMINATED FILM TO A VACUUM EVAPORATION PROCESS SO AS TO EFFECT A VACUUM EVAPORATION TO THE FIRST FILM AT ONE SURFACE THEREOF, WINDING THE LAMINATED FILM HAVING ITS FIRST FILM HAVING BEEN TREATED INTO A ROLL, PEELING OFF THE FIRST FILM FROM THE SECOND FILM AT THE OUTERMOST OF THE ROLL AND UNWIND ONE OF THEM AROUND THE ROLL, FORMING A NEW LAMINATED FILM BY
Claim 2
Independent Claim
163 words
A METHOD FOR EFFECTING VACCUM EVAPORATION ONTO BOTH SURFACES OF A FILM COMPRISING FORMING A LAMINATED FILM CONSISTING OF A FIRST FILM TO BE TREATED AND A SECOND FILM WHICH SERVES AS A BASE FILM BEING OF A THICKNESS AT LEAST EQUAL TO THAT OF THE FIRST FILM, SAID FIRST AND SAID SECOND FILMS BEING NOT SUBJECTED TO ELONGATION PRIOR TO THE LAMINATION, ELONGATING THE LAMINATED FILM AT LEAST UNIAXIALLY AT A TEMPERATURE BELOW THE MELTING POINTS OF THE MATERIALS OF THE TWO FILMS AND ABOVE THE SECOND ORDER TRANSITION POINTS OF THE TWO MATERIALS, SUBJECTING THUS ELONGATED LAMINATED FILM TO A VACUUM EVAPORATION PROCESS SO AS TO EFFECT A VACUUM EVAPORATION TO THE FIRST FILM AT ONE SURFACE THEREOF, WINDING THE LAMINATED FILM HAVING ITS FIRST FILM HAVING BEEN TREATED INTO A ROLL, PEELING OFF THE FIRST FILM FROM THE SECOND FILM AT THE OUTERMOST OF THE ROLL AND UNWIND ONE OF THEM AROUND THE ROLL, FORMING A NEW LAMINATED FILM BY
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |