Patent US3645830A successfully refreshed from Google Patents.
US3645830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming plastic louver screen
Assignee: Flex-O-Glass Inc
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Filing: 1969-10-13
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Granted: 1972-02-29
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Expires: 1989-10-13
Abstract
Abstract Apparatus for forming a plastic louver screen from a flat sheet of plastic material, said screen having a plurality of cut louvers twisted from the flat configuration of the sheet and permanently set without residual stress in the twisted configuration. The disclosed apparatus for forming the plastic louver screen includes a forming support member, means for softening the plastic sheet and cutting the plastic sheet to conform to the forming support member, thereby to provide in the sheet a louver screen configuration. The forming support member may comprise a plurality of block members having upper surfaces defining the metal louver screen configuration or a continuous belt defining the metal louver screen configuration. The louver screen is formed of a settable plastic. In one form, the louver screen includes a layer of metal which may be embedded therein or define a surface thereof.
Inventors
- 👤 Harold Warp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:17
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/02; B26; B26D; B26D1/00; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T29/00; Y10T29/49; Y10T29/496
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
Apparatus for forming a plastic louver screen, comprising: a forming support member having a louver screen configuration; means for feeding a strip of plastic material onto said forming support member; means for softening said fed plastic material; means for deformably piercing the softened plastic material suitably to conform to the louver screen configuration of said forming support member to define a corresponding plastic louver screen configuration; means for setting said plastic material on said support member to define a set plastic louver screen; and means for withdrawing said set plastic louver screen from said setting means.
Claim 2
Dependent Claim
96 words
Apparatus for forming a plastic louver screen, comprising: a forming support member having a louver screen configuration; means for feeding a strip of plastic material onto said forming support member; means for softening said fed plastic material; means for deformably piercing the softened plastic material suitably to conform to the louver screen configuration of said forming support member to define a corresponding plastic louver screen configuration; means for setting said plastic material on said support member to define a set plastic louver screen; and means for withdrawing said set plastic louver screen from said setting means.
Claim 3
Dependent Claim
23 words
The plastic louver screen forming apparatus of claim 1 wherein said plastic material is a thermoplastic and said softening means comprises heating means.
Claim 4
Dependent Claim
43 words
The plastic louver screen forming apparatus of claim 1 wherein said means for causing the softened plastic material to conform to the louver screen configuration comprise means for cutting the softened plastic and urging it into conforming engagement with said forming support member.
Claim 5
Dependent Claim
49 words
The plastic louver screen forming apparatus of claim 1 wherein said means for causing the softened plastic material to conform to the louver screen configuration comprises means for cutting the softened plastic and electrostatic means for urging the cut plastic material into conforming engagement with said forming support member.
Claim 6
Dependent Claim
28 words
The plastic louver screen forming apparatus of claim 1 further including means for tempering said plastic louver screen configuration to relieve stresses therein prior to the setting thereof.
Claim 7
Dependent Claim
23 words
The plastic louver screen forming apparatus of claim 5 wherein said setting means comprises means for chilling said tempered plastic louver screen configuration.
Claim 8
Dependent Claim
22 words
The plastic louver screen forming apparatus of claim 1 wherein said setting means comprises means for chilling said plastic louver screen configuration.
Claim 9
Dependent Claim
31 words
The plastic louver screen forming apparatus of claim 1 wherein said forming support member comprises a continuous metal belt and further including means for driving said belt in a looped path.
Claim 10
Dependent Claim
49 words
The plastic louver screen forming apparatus of claim 8 wherein said driving means includes means conforming to said louver screen configuration and meshed therewith at the zone wherein said plastic strip is caused to conform to said louver screen configuration thereby to conformably support said belt at said zone.
Claim 11
Dependent Claim
38 words
The plastic louver screen forming apparatus of claim 1 wherein said forming support member comprises a block having an upper surface defining said louver screen configuration and means are provided for driving said block in a looped path.
Claim 12
Dependent Claim
37 words
The plastic louver screen forming apparatus of claim 1 wherein said setting means comprises a block having an upper surface defining said louver screen configuration and means are provided for driving said block in a looped path.
Claim 13
Dependent Claim
46 words
The plastic louver screen forming apparatus of claim 1 wherein said means for causing the softened plastic material to conform to the louver screen configuration of said forming support member includes means for cutting the plastic strip prior to being fed into said forming support member.
Claim 14
Dependent Claim
38 words
The plastic louver screen forming apparatus of claim 1 wherein said strip comprises a sheet of transparent plastic and a layer of opaque material bonded thereto, said apparatus concurrently cutting said sheet and said layer of said strip.
Claim 15
Dependent Claim
22 words
The plastic louver screen forming apparatus of claim 1 wherein said strip has a layer of metal bonded to one surface thereof.
Claim 16
Dependent Claim
19 words
The plastic louver screen forming apparatus of claim 1 wherein said strip has a layer of metal embedded therein.
References Cited (Backward Citations)
US2203937A
Cited
US2581993A
Cited
US2583682A
Cited
US3180778A
Cited
US3257252A
Cited
US3203079A
Cited
US3318751A
Cited
US3238683A
Cited
US3305419A
Cited
US3472723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |