Patent US4452750A successfully refreshed from Google Patents.
US4452750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low energy processing of thermoplastic polymers
Assignee: Union Carbide Corp
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Filing: 1983-04-18
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Granted: 1984-06-05
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Expires: 2003-04-18
Abstract
Abstract In the operation of a melter/mixer-gear pump system for processing of synthetic thermoplastic materials, the improvement is disclosed which comprises employing the pressure between the melter/mixer and the gear pump as the controlling parameter which affects, in a proportional relationship, the speed of the gear pump, the energy transmitted to and the consequent temperature of the materials passing through said melter/mixer.
Inventors
- 👤 Richard H. Handwerk
- 👤 Alfred Mendelsohn
- 👤 Urho S. Haapala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:15
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29C; B29C48/00; B29C48/25; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92314; B29C2948/92323; B29C2948/92361; B29C2948/9238; B29C2948/92504; B29C2948/92514; B29C2948/92542; B29C2948/9258; B29C2948/9259; B29C2948/92704; B29C2948/92809; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C2948/92952; B29C48/03; B29C48/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
In the operation of a melter/mixer-gear pump system for the processing of synthetic thermoplastic materials, the improvement which comprises providing close coupling of said melter/mixer to said gear pump arranged in a system and by employing the pressure between the melter/mixer and the gear pump as the parameter controlling, in a proportional relationship, the speed of said gear pump, the energy transmitted to and the consequent temperature of said materials passing through said melter/mixer.
Claim 2
Dependent Claim
74 words
In the operation of a melter/mixer-gear pump system for the processing of synthetic thermoplastic materials, the improvement which comprises providing close coupling of said melter/mixer to said gear pump arranged in a system and by employing the pressure between the melter/mixer and the gear pump as the parameter controlling, in a proportional relationship, the speed of said gear pump, the energy transmitted to and the consequent temperature of said materials passing through said melter/mixer.
Claim 3
Dependent Claim
83 words
In the operation of a melter/mixer-gear pump-pelleter system for the processing of synthetic thermoplastic materials, the improvement which comprises providing said melter/mixer to said gear pump with close coupling and said gear pump to said pelleter, all arranged in an in-line system, and by employing the pressure between the melter/mixer and the gear pump as the parameter controlling, in a proportional relationship, the speed of said gear pump, the energy transmitted to and the consequent temperature of said materials passing through said melter/mixer.
Claim 4
Dependent Claim
83 words
In the operation of a melter/mixer-gear pump-pelleter system for the processing of synthetic thermoplastic materials, the improvement which comprises providing said melter/mixer to said gear pump with close coupling and said gear pump to said pelleter, all arranged in an in-line system, and by employing the pressure between the melter/mixer and the gear pump as the parameter controlling, in a proportional relationship, the speed of said gear pump, the energy transmitted to and the consequent temperature of said materials passing through said melter/mixer.
Claim 5
Dependent Claim
30 words
The process in accordance with claim 2, wherein said close coupling is effected between the discharge of the polymerization reactor of a system through the melter/mixer and gear pump system.
Claim 6
Dependent Claim
44 words
The process in accordance with claim 3, wherein the pressure at the interface between the melter/mixer and the gear pump is employed as the parameter controlling the speed of said gear pump and the consequent energy transmitted to said materials passing through said melter/mixer.
References Cited (Backward Citations)
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Cited
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US3737506A
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GB1364725A
Cited
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US4032391A
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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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |