Patent US4633044A successfully refreshed from Google Patents.
US3619601A
Expired / Lapsed
US
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Method and apparatus for posterior photocuring
Assignee: WR Grace and Co
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Filing: 1968-10-28
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Granted: 1971-11-09
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Expires: 1988-10-28
Abstract
Abstract The disclosed invention is for an apparatus and improvements in a method of operating an apparatus for posterior photocuring a photocurable composition. The apparatus includes a housing having an actinic light source therein and near one end is disposed a platform adapted to receive thereon a supported liquid photocurable composition which has been exposed to actinic light through an image bearing transparency and which is selectively insolubilized in the exposed portions thereof. The invention is especially useful for posterior photocuring a selectively exposed lamination in preparing a developable printing plate from a liquid photocurable composition.
Inventors
- 👤 Donald Paul Gush
- 👤 Forrest Ashton Wessells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:15
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/3014
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
45 words
The apparatus of claim 1 wherein the Shutter means includes a plurality of parallel rotatable members open and closed by a pneumatic operated piston controlled by a timer which regulates the time during which the shutter is to permit actinic radiation to be projected therethrough.
Claim 2
Dependent Claim
28 words
The apparatus of claim 2 wherein the timer automatically regulates the opening period of the shutters for a period of time of about 0.1 to about 60 seconds.
Claim 3
Dependent Claim
17 words
The apparatus of claim 3 wherein the period of time is about 10 to about 25 seconds.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1 wherein a second platform is provided in said second compartment below said actinic radiation means for further posterior photocuring the photocurable composition on the support surface.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein said first platform is a slidable shelf having a transparent platform formed thereon.
Claim 6
Dependent Claim
27 words
The apparatus of claim 5 wherein said first platform is a slidable shelf having a transparent platform formed thereon and said second platform is a slidable shelf.
Claim 7
Dependent Claim
21 words
The apparatus of claim 7 wherein a second shutter means is included intermediate the actinic radiation means and said second platform.
Claim 8
Dependent Claim
44 words
The apparatus of claim 8 wherein both shutter means includes a plurality of parallel rotatable members open and closed by a pneumatic-operated piston controlled by a timer which regulates the time during which each shutter is to permit actinic radiation to be projected therethrough.
Claim 9
Dependent Claim
28 words
The apparatus of claim 9 wherein a timer automatically regulates the opening period of said second shutter means for a period of time up to about 20 minutes.
Claim 10
Dependent Claim
17 words
The apparatus of claim 10 wherein the period of time is about 1 to about 5 minutes.
References Cited (Backward Citations)
US1060813A
Cited
US978955A
Cited
US1040710A
Cited
US1168622A
Cited
US2138445A
Cited
US2790493A
Cited
GB739987A
Cited
CH355028A
Cited
US3445166A
Cited
US3547730A
Cited
US3537853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |