Patent US4124249A successfully refreshed from Google Patents.
Patent US3971691A successfully refreshed from Google Patents.
US3971691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for film application
Assignee: Hercules LLC
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Filing: 1975-03-27
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Granted: 1976-07-27
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Expires: 1995-03-27
Abstract
Abstract The invention is apparatus for laying film in wrinkle-free fashion on a flat surface. A protective film is automatically laid down on a flat rigid vacuum support plate capable of having an image bearing transparency thereon when the instant invention traverses the rigid support plate in one pass in one direction. A photosensitive material and a backing material may then be subsequently supplied to the rigid support plate upon a second pass in the reverse direction to provide a photopolymer plate which may be exposed through a transparency covered by said first film. The resulting photopolymer plate having hardened relief image areas may then be further treated to provide a printing plate.
Inventors
- 👤 Michael John Cairns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:51
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; B; B29; B29C; B29C63/00; B29C63/02; B29C63/024; B29L; B29L2031/00; B29L2031/764; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1343; Y10T156/17; Y10T156/1788; Y10T156/1795
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
368 words
Film application apparatus for laying film in wrinkle-free fashion on a flat plate comprising: a flat plate having vacuum channels in the surface thereof, said flat plate having a front end and a rear end; a carriage reciprocally mounted on said flat plate to traverse said flat plate; cover film supply roll rotatably connected to said carriage by friction clutch means to provide resistance to rotation of said film to statically and dynamically tension said film; pressure roller to press said film in contact with said plate; eccentric means rotatably connecting said pressure roller to said carriage, initial linear motion of said carriage in one direction from said front end to said rear end moving said pressure roller into contact with said film and initial linear motion in the opposite direction moving said pressure roller to an elevated spaced apart position above said flat plate; hot wire cutting means positioned adjacent said rear end of said flat plate to sever said film rolled onto the surface of said flat plate when said carriage reaches said rear end of said flat plate; vertically movable vacuum bar means movably connected to said carriage to force film into contact with said cutting means and to hold the trailing edge of the cover film supply roll when severed; a stationary vacuum bar positioned adjacent said hot wire cutting means at said rear end of said flat plate to retain the severed portion of the film on said flat plate after said vertically movable vacuum bar forces the film into contact with said hot wire cutting means; air bar means connected to said carriage and interconnected with said vertically movable vacuum bar to release said trailing edge of the cover film supply roll and blow said film toward said flat plate upon initial movement of said carriage in said one direction; and, means for feeding a liquid photosensitive material onto said film to form a layer of photosensitive material and means for laminating a backing material onto said layer of photosensitive material, said means for feeding liquid and said means for laminating a backing material, both mounted on said carriage and being activated upon return movement of said carriage in said opposite direction.
Claim 2
Dependent Claim
368 words
Film application apparatus for laying film in wrinkle-free fashion on a flat plate comprising: a flat plate having vacuum channels in the surface thereof, said flat plate having a front end and a rear end; a carriage reciprocally mounted on said flat plate to traverse said flat plate; cover film supply roll rotatably connected to said carriage by friction clutch means to provide resistance to rotation of said film to statically and dynamically tension said film; pressure roller to press said film in contact with said plate; eccentric means rotatably connecting said pressure roller to said carriage, initial linear motion of said carriage in one direction from said front end to said rear end moving said pressure roller into contact with said film and initial linear motion in the opposite direction moving said pressure roller to an elevated spaced apart position above said flat plate; hot wire cutting means positioned adjacent said rear end of said flat plate to sever said film rolled onto the surface of said flat plate when said carriage reaches said rear end of said flat plate; vertically movable vacuum bar means movably connected to said carriage to force film into contact with said cutting means and to hold the trailing edge of the cover film supply roll when severed; a stationary vacuum bar positioned adjacent said hot wire cutting means at said rear end of said flat plate to retain the severed portion of the film on said flat plate after said vertically movable vacuum bar forces the film into contact with said hot wire cutting means; air bar means connected to said carriage and interconnected with said vertically movable vacuum bar to release said trailing edge of the cover film supply roll and blow said film toward said flat plate upon initial movement of said carriage in said one direction; and, means for feeding a liquid photosensitive material onto said film to form a layer of photosensitive material and means for laminating a backing material onto said layer of photosensitive material, said means for feeding liquid and said means for laminating a backing material, both mounted on said carriage and being activated upon return movement of said carriage in said opposite direction.
Claim 3
Dependent Claim
45 words
A device as in claim 1, further including safety clamp means connected to said front end of said flat plate to momentarily clamp said film to insure release of said film from said vertically movable vacuum bar means in the event of photosensitive material contamination.
References Cited (Backward Citations)
US2818908A
Cited
US2961031A
Cited
US3502536A
Cited
US3751164A
Cited
US3671362A
Cited
US3832262A
Cited
US3848998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |