US4080735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper blade
Assignee: Phillips Fibers Corp
•
Filing: 1976-10-14
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Granted: 1978-03-28
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Expires: 1996-10-14
Abstract
Abstract A scraper blade comprises poly(arylene sulfide) and carbonaceous filler wherein the amount of poly(arylene sulfide) ranges from about 40 to about 80 percent by weight and the amount of carbonaceous filler ranges from about 60 to about 20 percent by weight.
Inventors
- 👤 Arnold Michalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:34
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/04; B; B23; B23D; B23D79/00; B23D79/02; B23D79/08; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/27; B29C48/05
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A scraper blade for cleaning the extrusion face of a spinneret used for spinning polyethylene terephthalate comprising poly(arylene sulfide) and carbonaceous filler wherein the amount of poly(arylene sulfide) ranges from about 40 to about 80 percent by weight and the amount of carbonaceous filler ranges from about 60 to about 20 percent by weight so that said scraper blade resists the tendency of the extruded molten polymer to stick thereto, said scraper blade being in the form of a plate having an edge tapered to produce a sharpened edge.
Claim 2
Dependent Claim
89 words
A scraper blade for cleaning the extrusion face of a spinneret used for spinning polyethylene terephthalate comprising poly(arylene sulfide) and carbonaceous filler wherein the amount of poly(arylene sulfide) ranges from about 40 to about 80 percent by weight and the amount of carbonaceous filler ranges from about 60 to about 20 percent by weight so that said scraper blade resists the tendency of the extruded molten polymer to stick thereto, said scraper blade being in the form of a plate having an edge tapered to produce a sharpened edge.
Claim 3
Dependent Claim
24 words
The scraper blade of claim 1 further comprising a handle attached to said blade and extending outwardly from the plate opposite said sharpened edge.
Claim 4
Dependent Claim
36 words
The scraper blade of claim 1 wherein the amount of poly(arylene sulfide) ranges from about 55 to about 65 weight percent and the amount of carbonaceous filler ranges from about 35 to about 45 weight percent.
Claim 5
Dependent Claim
13 words
The scraper blade of claim 1 wherein the poly(arylene sulfide) is poly(phenylene sulfide).
Claim 6
Dependent Claim
37 words
The scraper blade according to claim 1, wherein the poly(arylene sulfide) used to produce said scraper blade has a melt flow ranging from about 0 to about 4000 according to ASTM 1238-65T at 600° F (315° C).
Claim 7
Dependent Claim
14 words
The scraper blade according to claim 1 wherein the carbonaceous filler is graphite fibers.
Claim 8
Dependent Claim
25 words
The scraper blade according to claim 1 wherein the carbonaceous filler is graphite fibers in the form of chopped carbon matt having a pitch base.
Claim 9
Dependent Claim
11 words
The scraper blade according to claim 1 produced by injection molding.
Claim 10
Dependent Claim
11 words
The scraper blade according to claim 1 produced by compression molding.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |