US4074707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-spinning grid
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-03-08
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Granted: 1978-02-21
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Expires: 1996-03-08
Abstract
Abstract A melt grid for the melting of particulate, solid polymer, comprising upper and lower faces between which runs at last one aperture of elongated cross-section bounded by at least one fin adapted for heating for melting polymer, the surface of the fin or fins bearing grooves running in the direction from the upper to the lower face of the grid.
Inventors
- 👤 Arthur Perelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:23
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/022; D; D01; D01D; D01D1/00; D01D1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
An improved melt grid for the melting of solid particulate polymer, which melt grid comprises a plurality of elongated aligned fins defining an upper receiving face and a lower effluent face connected by at least one first aperture of elongated cross-section, at least one second aperture longitudingly disposed within one of said fins intermediate the upper and lower faces providing a heat-receiving surface within the melt grid, wherein the improvement comprises said first aperture is formed by opposed sides of two fins with at least one of said sides bearing a plurality of grooves running in a direction from said upper receiving face to said lower effluent face, and wherein said grooves have a width of at least 1 mm.
Claim 2
Dependent Claim
120 words
An improved melt grid for the melting of solid particulate polymer, which melt grid comprises a plurality of elongated aligned fins defining an upper receiving face and a lower effluent face connected by at least one first aperture of elongated cross-section, at least one second aperture longitudingly disposed within one of said fins intermediate the upper and lower faces providing a heat-receiving surface within the melt grid, wherein the improvement comprises said first aperture is formed by opposed sides of two fins with at least one of said sides bearing a plurality of grooves running in a direction from said upper receiving face to said lower effluent face, and wherein said grooves have a width of at least 1 mm.
Claim 3
Dependent Claim
13 words
A melt grid according to claim 1 comprising a plurality of first apertures.
Claim 4
Dependent Claim
19 words
A melt grid according to claim 1 wherein said cross-section of said first aperture decreases in the downwards direction.
References Cited (Backward Citations)
US2916262A
Cited
SU126984A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |