US3775933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of packaging friable bales of elastomeric material
Assignee: DSM Copolymer Inc
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Filing: 1971-07-09
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Granted: 1973-12-04
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Expires: 1991-07-09
Abstract
Abstract Friable bales of elastomeric crumb formed of porous crumb having a bulk density within the range of 16 to 30 pounds per cubic foot and compressed into bales having a bulk density within the range of 24 to 45 pounds per cubic foot and packaged in separated loadfree compartments for storage or shipment without loss of friability.
Inventors
- 👤 E Prescott
- 👤 E Copus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:03
CPC Classifications
B; B65; B65B; B65B63/00; B65B63/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
The method for producing a friable bale of elastomeric material from EPDM crumb comprising the steps of providing a porous elastomeric crumb having a bulk density within the range of 16 to 30 pounds per cubic foot, introducing the crumb into a mold cavity at a temperature below 140*F to about 97*F, with the temperature proportional to the bound ethylene content of the EPDM crumb with the bound ethylene content of the EPDM crumb being above about 79 percent, compressing the crumb by an amount to increase the bulk density to within the range of 24 to 45 pounds per cubic foot to form a bale, removing the bale from the press and enclosing the bale within a wrapper of a waterproof material.
Claim 2
Independent Claim
123 words
The method for producing a friable bale of elastomeric material from EPDM crumb comprising the steps of providing a porous elastomeric crumb having a bulk density within the range of 16 to 30 pounds per cubic foot, introducing the crumb into a mold cavity at a temperature below 140*F to about 97*F, with the temperature proportional to the bound ethylene content of the EPDM crumb with the bound ethylene content of the EPDM crumb being above about 79 percent, compressing the crumb by an amount to increase the bulk density to within the range of 24 to 45 pounds per cubic foot to form a bale, removing the bale from the press and enclosing the bale within a wrapper of a waterproof material.
Claim 3
Dependent Claim
33 words
The method as claimed in claim 1 in which the compression of the crumb to form the bale is relieved with minimum dwell after the bale has been reduced to the desired density.
Claim 4
Dependent Claim
25 words
The method as claimed in claim 1 in which the bale is formed when the density of the crumb is increased by about 50 percent.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |