US3745915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hot baling acrylic staple
Assignee: EIDP Inc
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Filing: 1971-09-30
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Granted: 1973-07-17
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Expires: 1991-09-30
Abstract
Abstract An improvement in the process of preparing bales of dry-cut acrylic staple fibers from dried multifilament acrylic tow. The improvement comprises heating the cut fibers to a temperature of 45*-100*C. with heated air after they are cut but just prior to entry into the baler. Such heating provides a bale having a density greater than if the fibers had not been so heated. Thus, more staple fibers can be packed into a bale using this improvement.
Inventors
- 👤 F Rehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/30; B30B9/3003; B30B9/3035; B65; B65B; B65B63/00; B65B63/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
In the process of preparing bales of dry-cut arcylic staple fibers from dried multifilament acrylic tow, which process comprises the steps of cutting a dry multi-filament acrylic tow into staple fibers, conveying the staple fibers to the bale chamber of a staple fiber baler, compressing the staple fibers into a bale and packaging the resulting bale, the improvement which comprises heating the cut fibers to a temperature between about 45*C. and about 100*C. with heated air immediately prior to entry of the fibers into the bale chamber.
Claim 2
Dependent Claim
87 words
In the process of preparing bales of dry-cut arcylic staple fibers from dried multifilament acrylic tow, which process comprises the steps of cutting a dry multi-filament acrylic tow into staple fibers, conveying the staple fibers to the bale chamber of a staple fiber baler, compressing the staple fibers into a bale and packaging the resulting bale, the improvement which comprises heating the cut fibers to a temperature between about 45*C. and about 100*C. with heated air immediately prior to entry of the fibers into the bale chamber.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the cut fibers are heated to a temperature between about 45*C. and 75*C. immediately prior to entry of the fibers into the bale chamber.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein the acrylic fiber contains at least 85 percent by weight of units derived from acrylonitrile.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the acrylic fiber contains at least 85 percent by weight of units derived from acrylonitrile.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the acrylic fiber is a bicomponent fiber.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the acrylic fiber is a homofiber.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |