Patent US3589163A successfully refreshed from Google Patents.
US3589163A
Expired / Lapsed
US
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Extrusion apparatus with flow diverter
Assignee: Gulf & Western Ind Prod Co
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Filing: 1969-04-14
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Granted: 1971-06-29
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Expires: 1989-04-14
Abstract
Abstract An extrusion apparatus of the type including a screw-type feeder which supplies material to a die block for extrusion therethrough. The apparatus is provided with a diverting valve assembly between the feeder and the die block. The valve assembly is arranged to divert flow from the feeder around the die block so that during a die change operation the material flow rates and temperatures are maintained. Consequently, following the die change, extrusion can immediately resume without the necessity of waiting while the material is again brought to the proper conditions.
Inventors
- 👤 John J Byrne
- 👤 Ignatius J Niemkiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:03
CPC Classifications
B; B21; B21C; B21C33/00; B21C33/02; B29; B29B; B29B7/00; B29B7/80; B29B7/801; Y; Y10; Y10S; Y10S425/00; Y10S425/224
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
In an extrusion apparatus of the type including a die block with at least one extrusion die and a screw feeder for supplying material to the die at predetermined conditions: the improvement comprising diverting means intermediate the feeder and the die, said diverting means being movable between first and second positions and having first and second passageway means therein for selectively permitting flow directly from the feeder to the die through said first passageway means or directing the flow away from the die through said second passageway means; said second passageway means including flow restrictor means for providing a resistance to flow through said second passageway means greater than the resistance provided by said first passageway means and generally equal to the resistance to flow through the first passageway means and the die together.
Claim 2
Dependent Claim
134 words
In an extrusion apparatus of the type including a die block with at least one extrusion die and a screw feeder for supplying material to the die at predetermined conditions: the improvement comprising diverting means intermediate the feeder and the die, said diverting means being movable between first and second positions and having first and second passageway means therein for selectively permitting flow directly from the feeder to the die through said first passageway means or directing the flow away from the die through said second passageway means; said second passageway means including flow restrictor means for providing a resistance to flow through said second passageway means greater than the resistance provided by said first passageway means and generally equal to the resistance to flow through the first passageway means and the die together.
Claim 3
Dependent Claim
25 words
The apparatus as defined in claim 1 wherein said diverting means includes a slide valve member having said first and second passageway means formed therein.
Claim 4
Dependent Claim
45 words
The apparatus as defined in claim 1 wherein said diverting means includes a cylindrical slide valve member having said first and second passageway means formed therein, said first passageway for permitting flow directly from said feeder to said die block when in said first position.
Claim 5
Dependent Claim
21 words
The apparatus as defined in claim 1 including power means for moving said diverting means between said first and second positions.
Claim 6
Dependent Claim
166 words
In an extrusion apparatus of the type including a die block with at least one extrusion die and a screw feeder for supplying material to the die at predetermined conditions: the improvement comprising diverting means intermediate the feeder and the die, said diverting means being movable between first and second positions and having first and second passageway means therein for selectively permitting flow directly from the feeder to the die through said first passageway means or directing flow away from the die through said second passageway means; said second passageway means including flow restrictor means for providing a resistance flow generally similar to the resistance to flow through the fiRst passageway means and the die; power means for moving said diverting means between said first and second positions, said diverting means including a slide valve member having said passageway means therein, said power means adapted to reciprocate said slide valve member along a path perpendicular to a line extending between said feeder and said die block.
Claim 7
Dependent Claim
166 words
In an extrusion apparatus of the type including a die block with at least one extrusion die and a screw feeder for supplying material to the die at predetermined conditions: the improvement comprising diverting means intermediate the feeder and the die, said diverting means being movable between first and second positions and having first and second passageway means therein for selectively permitting flow directly from the feeder to the die through said first passageway means or directing flow away from the die through said second passageway means; said second passageway means including flow restrictor means for providing a resistance flow generally similar to the resistance to flow through the fiRst passageway means and the die; power means for moving said diverting means between said first and second positions, said diverting means including a slide valve member having said passageway means therein, said power means adapted to reciprocate said slide valve member along a path perpendicular to a line extending between said feeder and said die block.
Claim 8
Dependent Claim
15 words
The apparatus as defined in claim 5 wherein said power means is a fluid cylinder.
Claim 9
Dependent Claim
42 words
The apparatus as defined in claim 5 wherein said slide valve member is a cylinder and said first of said passageway means extends diametrically therethrough and the second of said passageway means extends between the side and an end of said cylinder.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |