US3720742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapping of baled polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-03-08
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Granted: 1973-03-13
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Expires: 1991-03-08
Abstract
Abstract Polymeric material such as solid particulate polymers as illustrated by butyl rubber, Vistanex, polyolefins such as polyethylene and polypropylene, and the like which contain residual moisture and/or gasiform material are baled and simultaneously encapsulated or wrapped in a baling zone, the interior wall of which is heated, and depending on the material being baled, subsequent to coating the wall with a polyolefin while applying mechanical pressure and reduced pressure to remove the moisture and/or gasiform material to form the bale.
Inventors
- 👤 M Shelton
- 👤 R James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
B; B29; B29B; B29B15/00; B29B15/02; B29B15/026; B29B9/00; B29B9/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A method of encapsulating compressible solid elastomeric material which comprises: applying a coating of polyolefin to the interior wall of a baling zone; forming a body of said solid material in said baling zone; and in one operation applying mechanical pressure within the range of 60 to 300 psig to said body for a time from about 3 to about 30 seconds under reduced pressure within the range of 0.5 to 29 inches Hg absolute in said zone while applying heat only to the outer edges of said body sufficient to raise the temperature of said polyolefin above its melting point and form a film of said polyolefin encapsulating said body as said body is reduced in volume and increased in density.
Claim 2
Independent Claim
122 words
A method of encapsulating compressible solid elastomeric material which comprises: applying a coating of polyolefin to the interior wall of a baling zone; forming a body of said solid material in said baling zone; and in one operation applying mechanical pressure within the range of 60 to 300 psig to said body for a time from about 3 to about 30 seconds under reduced pressure within the range of 0.5 to 29 inches Hg absolute in said zone while applying heat only to the outer edges of said body sufficient to raise the temperature of said polyolefin above its melting point and form a film of said polyolefin encapsulating said body as said body is reduced in volume and increased in density.
Claim 3
Dependent Claim
16 words
A method in accordance with claim 1 in which the solid elastomeric material is butyl rubber.
Claim 4
Dependent Claim
15 words
A method in accordance with claim 1 in which the solid elastomeric material is particulate.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 1 in which the polyolefin powder comprises polyethylene powder.
Claim 6
Dependent Claim
15 words
A method in accordance with claim 1 in which the polyolefin powder comprises polypropylene powder.
Claim 7
Dependent Claim
14 words
A method in accordance with claim 1 in which the elastomeric material is polyisobutylene.
Claim 8
Dependent Claim
14 words
A method in accordance with claim 1 in which the polyolefin is a suspension.
Claim 9
Dependent Claim
26 words
A method in accordance with claim 1 in which the interior wall of the baling zone is coated with a suspension of polyethylene powder and talc.
Claim 10
Dependent Claim
27 words
A method in accordance with claim 1 in which the interior wall of the baling zone is coated with a polyethylene solution containing talc and silicone oil.
Claim 11
Dependent Claim
15 words
A method in accordance with claim 1 in which the elastomer is an olefinic copolymer.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |