Patent US5704355A successfully refreshed from Google Patents.
Patent US3608615A successfully refreshed from Google Patents.
US3608615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foil production
Assignee: Freeport Minerals Corp
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Filing: 1970-08-20
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Granted: 1971-09-28
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Expires: 1990-08-20
Abstract
Abstract Vaporized material is condensed and solidified on the surface of a revolving drum from which the material is stripped as a foil. A leader or starter sheet is temporarily magnetically retained on the drum and extended to a takeup means to aid in starting continuous deposition and stripping. Electron beams are employed in various ways to vaporize the material.
Inventors
- 👤 John J Conlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:20
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
The method of claim 1 including the steps of applying a coating of a hardenable material to which the film will adhere and which is adherent to the leader over at least a portion of the movable surface and the first end portion of the leader, and hardening the coating.
Claim 2
Dependent Claim
140 words
In an apparatus for the continuous production of vapor-deposited foil comprising a source of material to be vaporized, means to vaporize the material, a movable surface upon which the vapor is condensed as a film and solidified into a low adherence foil, and tension-exerting means to strip the foil from the movable surface, the improvement which comprises a leader sheet of magnetic material to which the film will adhere, a first end of the leader being positioned to overlie the movable surface in the region of vapor deposition, the remainder of the leader extending at least to the tension-exerting means such that the initially deposited vapor will form a continuous film on the leader and movable surface, and magnet means associated with the movable surface for magnetically retaining the first end of the leader in position on the movable surface.
Claim 3
Dependent Claim
37 words
The apparatus of claim 3 in which the movable surface is a drum and the magnetic means is a strip of magnetized material interior of the drum, extending axially of and proximate the surface of the drum.
Claim 4
Dependent Claim
18 words
The apparatus of claim 4 wherein the drum is hollow and a coolant is circulated through the interior.
Claim 5
Dependent Claim
24 words
The apparatus of claim 4 wherein the drum has radially spaced exterior and interior cylindrical walls and a coolant is circulated through the space.
Claim 6
Dependent Claim
44 words
The apparatus of claim 6 wherein the strip of magnetized material is interior of the interior cylindrical wall and magnetic conductor material extends rAdially through the space between the walls from the magnet poles to a point proximate the outer surface of the drum.
Claim 7
Dependent Claim
45 words
The apparatus of claim 7 wherein the strip of magnetized material is a plurality of individual magnets in a line and the magnetic conductor material is in the form of a plurality of radial rods, each having their interior end, proximate pole of a magnet.
Claim 8
Dependent Claim
46 words
The apparatus of claim 3 including a coating of hardenable material to which the film will adhere and which is adherent to the leader applied to and hardened on the said first end of the leader and at least the adjacent portion of the movable surface.
References Cited (Backward Citations)
GB736310A
Cited
US2864137A
Cited
US3181209A
Cited
US3183563A
Cited
US3196003A
Cited
US3506803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |