US3860036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable geometry feed block for multilayer extrusion
Assignee: Dow Chemical Co
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Filing: 1972-11-06
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Granted: 1975-01-14
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Expires: 1992-11-06
Abstract
Abstract A device and method is described for forming a thermoplastic material into a predetermined layer configuration. The device comprises a body which defines a passage having inlet and outlet ports on opposite sides of the body. A flexible wall portion separates the passage from a cavity within the body. An adjusting means is in operational combination with the flexible wall portion to flex said wall to vary the cross-sectional configuration of the passage.
Inventors
- 👤 Jr Ritchey O Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:53
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92609; B29C2948/92819; B29C2948/92857; B29C2948/92904
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
100 words
A device comprising a body having generally opposite first and second sides, said body defining: at least one passage with an inlet port in the first side, an outlet port in the second side and at least one flexible wall portion; at least one cavity spaced apart from said passage by said flexible wall portion; and at least one adjusting means in operational combination with and spaced apart from said flexible wall portion and said cavity, said adjusting means adapted to flex said wall portion by application of a leverage producing force to vary the crosssectional configuration of said passage.
Claim 2
Independent Claim
100 words
A device comprising a body having generally opposite first and second sides, said body defining: at least one passage with an inlet port in the first side, an outlet port in the second side and at least one flexible wall portion; at least one cavity spaced apart from said passage by said flexible wall portion; and at least one adjusting means in operational combination with and spaced apart from said flexible wall portion and said cavity, said adjusting means adapted to flex said wall portion by application of a leverage producing force to vary the crosssectional configuration of said passage.
Claim 3
Dependent Claim
39 words
The device of claim 1 including at least one adjustable elongated insert having first and second ends positioned within the body to provide said flexible wall portion, at least the first end of said insert defining a wedging surface.
Claim 4
Dependent Claim
38 words
The device of claim 2 wherein said adjusting means includes a slidable pressure transmitting means in operational combination with the wedging surface of said insert and a force exerting means in operational combination with said pressure transmitting means.
Claim 5
Dependent Claim
128 words
A feed block for multilayer extrusion of a thermoplastic resinous material comprising a metallic body having generally opposite first and second sides, said body defining at least one passage of adjustable cross-section having an inlet port in the first side, an outlet port in the second side and at least two bendable wall portions; at least two cavities spaced apart from said passage by said bendable wall portions, said cavities adapted to permit deflection of the said bendable wall portions; and at least two adjusting means in operational combination with and spaced apart from said bendable wall portions and said cavities, said adjusting means adapted to regulatably bend said bendable wall portions by application of a leverage producing force thereto to alter the cross-sectional configuration of said passage.
Claim 6
Dependent Claim
128 words
A feed block for multilayer extrusion of a thermoplastic resinous material comprising a metallic body having generally opposite first and second sides, said body defining at least one passage of adjustable cross-section having an inlet port in the first side, an outlet port in the second side and at least two bendable wall portions; at least two cavities spaced apart from said passage by said bendable wall portions, said cavities adapted to permit deflection of the said bendable wall portions; and at least two adjusting means in operational combination with and spaced apart from said bendable wall portions and said cavities, said adjusting means adapted to regulatably bend said bendable wall portions by application of a leverage producing force thereto to alter the cross-sectional configuration of said passage.
Claim 7
Dependent Claim
40 words
The feed block of claim 4 including at least one adjustable elongated insert having first and second ends positioned within the body to provide a bendable wall portion, at least the first end of said insert defining a wedging surface.
Claim 8
Dependent Claim
39 words
The feed block of claim 5 wherein said adjusting means includes a slidable pressure transmitting means in operational combination with the wedging surface of said insert and a force exerting means in operational combination with said pressure transmitting means.
Claim 9
Independent Claim
135 words
A device comprising a body having generally opposite first and second sides, said body defining: at least one passage with an inlet port in the first side, an outlet port in the second side and at least one flexible wall portion; at least one cavity spaced apart from said passage by said flexible wall portion; at least two spaced apart flanges extending generally outwardly from said body at a position generally adjacent to said passage; and at least one adjusting means in operational combination with and spaced apart from said flexible wall portion, said adjusting means including at least one force exerting means adapted to alter the distance between said flanges, said adjusting means adapted to flex sAid wall portion by application of a leverage producing force to vary the cross-sectional configuration of said passage.
Claim 10
Independent Claim
135 words
A device comprising a body having generally opposite first and second sides, said body defining: at least one passage with an inlet port in the first side, an outlet port in the second side and at least one flexible wall portion; at least one cavity spaced apart from said passage by said flexible wall portion; at least two spaced apart flanges extending generally outwardly from said body at a position generally adjacent to said passage; and at least one adjusting means in operational combination with and spaced apart from said flexible wall portion, said adjusting means including at least one force exerting means adapted to alter the distance between said flanges, said adjusting means adapted to flex sAid wall portion by application of a leverage producing force to vary the cross-sectional configuration of said passage.
Claim 11
Dependent Claim
163 words
A feed block for multilayer extrusion of a thermoplastic resinous material comprising a metallic body having generally opposite first and second sides, said body defining at least one passage of adjustable cross-section having an inlet port in the first side, an outlet port in the second side and at least two bendable wall portions; at least two cavities spaced apart from said passage by said bendable wall portions, said cavities adapted to permit deflection of the said bendable wall portions; at least two spaced apart flanges extending generally outwardly from said body at a position generally adjacent to said passage; and at least two adjusting means in operational combination with and spaced apart from said bendable wall portions, said adjusting means including at least one force exerting means adapted to alter the distance between said flanges, said adjusting means adapted to regulatably bend said bendable wall portions by application of a leverage producing force thereto to alter the cross-sectional configuration of said passage.
Claim 12
Dependent Claim
163 words
A feed block for multilayer extrusion of a thermoplastic resinous material comprising a metallic body having generally opposite first and second sides, said body defining at least one passage of adjustable cross-section having an inlet port in the first side, an outlet port in the second side and at least two bendable wall portions; at least two cavities spaced apart from said passage by said bendable wall portions, said cavities adapted to permit deflection of the said bendable wall portions; at least two spaced apart flanges extending generally outwardly from said body at a position generally adjacent to said passage; and at least two adjusting means in operational combination with and spaced apart from said bendable wall portions, said adjusting means including at least one force exerting means adapted to alter the distance between said flanges, said adjusting means adapted to regulatably bend said bendable wall portions by application of a leverage producing force thereto to alter the cross-sectional configuration of said passage.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |