US3799509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer for a melt spinning apparatus
Assignee: EIDP Inc
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Filing: 1972-03-02
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Granted: 1974-03-26
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Expires: 1992-03-02
Abstract
Abstract A modification of a spinning pump wear plate that enables it to be used as a means to distribute polymer to spinning packs and as a mixing device directly upstream of the spinning pump. The inlet passage is formed of a plurality of channels through opposite sides of the wear plate with each channel containing a plurality of stationary mixing elements. Caps enclose the opposite sides and provide the means to connect successive channels to form a continuous folded enclosed inlet passage connecting the polymer source and the spinning pump.
Inventors
- 👤 B Bydal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:42
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01D1/065; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/433; B01F25/4331; B01F25/431; B01F25/4314; B01F25/43141; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187; Y10T137/86204; Y10T137/86228
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
In a melt spinning apparatus that includes a source of molten polymer connected to a wear plate having opposed sides through which polymer is distributed from the source to a plurality of spinning packs by means of a pump connected to inlet and outlet passages in the wear plate, the improvement comprising said inlet passage being comprised of a plurality of straight, hollow channels passing through the wear plate from one to the other of said opposed sides; a plurality of stationary mixing elements positioned in each of said channels forming spaced groups of elements; and a pair of caps enclosing said opposed sides, each of said caps in combination with said opposed sides forming at least one side channel, each of said side channels being connected with two of said straight channels, the combination of straight and side channels providing a continuous enclosed folded Inlet passage connecting said source and said pump.
Claim 2
Dependent Claim
153 words
In a melt spinning apparatus that includes a source of molten polymer connected to a wear plate having opposed sides through which polymer is distributed from the source to a plurality of spinning packs by means of a pump connected to inlet and outlet passages in the wear plate, the improvement comprising said inlet passage being comprised of a plurality of straight, hollow channels passing through the wear plate from one to the other of said opposed sides; a plurality of stationary mixing elements positioned in each of said channels forming spaced groups of elements; and a pair of caps enclosing said opposed sides, each of said caps in combination with said opposed sides forming at least one side channel, each of said side channels being connected with two of said straight channels, the combination of straight and side channels providing a continuous enclosed folded Inlet passage connecting said source and said pump.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |