US4076220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mixing and kneading control of a rubber kneader
Assignee: Bridgestone Corp
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Filing: 1976-02-10
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Granted: 1978-02-28
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Expires: 1996-02-10
Abstract
Abstract A method of mixing and kneading control of a rubber kneader comprising the steps of detecting the plasticity of a rubber raw material after the rubber raw material and additives are put into a receptacle of the rubber kneader, and controlling total energy spent by the electric motor of the rubber kneader and total revolutions of a mixing and kneading rotor of the rubber kneader in correspondence with the detected plasticity of the rubber raw material.
Inventors
- 👤 Katsutoshi Nakashima
- 👤 Toshio Kita
- 👤 Ryuzo Osawa
- 👤 Takashi Hatanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:07
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/72; B29B7/02; B29B7/22; B29B7/28; B29B7/283; B29B7/286; B29B7/74; B29B7/7476; B29B7/7495; B29B7/80; B29B7/82; B29B7/823; B29C; B29C48/00; B29C48/25; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92047; B29C2948/922; B29C2948/92209; B29C2948/92266; B29C2948/92323; B29C2948/92457; B29C2948/92504; B29C2948/92542; B29C2948/9258; B29C2948/9259; B29C2948/92695; B29C2948/92704; B29C2948/92761; B29C2948/92819; B29C2948/92952; B29C48/03; Y; Y10; Y10S; Y10S366/00; Y10S366/601
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A method of mixing and kneading control of a rubber kneader, comprising the steps of: placing rubber raw material and additives into a receptacle for working by said rubber kneader through electric motor means; detecting the plasticity of said rubber raw material as a peak electric power; comparing said detected peak electric power by a comparison circuit with a predetermined standard peak electric power; seeking deviation between said two peak electric powers for calculation of a shift coefficient; and controlling total electric energy in relation to said shift coefficient to be spent by said electric motor means of said rubber kneader and total revolutions of said shift coefficient of a mixing and kneading rotor of said rubber kneader corresponding to the detected plasticity of said rubber raw material.
Claim 2
Independent Claim
128 words
A method of mixing and kneading control of a rubber kneader, comprising the steps of: placing rubber raw material and additives into a receptacle for working by said rubber kneader through electric motor means; detecting the plasticity of said rubber raw material as a peak electric power; comparing said detected peak electric power by a comparison circuit with a predetermined standard peak electric power; seeking deviation between said two peak electric powers for calculation of a shift coefficient; and controlling total electric energy in relation to said shift coefficient to be spent by said electric motor means of said rubber kneader and total revolutions of said shift coefficient of a mixing and kneading rotor of said rubber kneader corresponding to the detected plasticity of said rubber raw material.
Claim 3
Dependent Claim
53 words
A method as set forth in claim 1, including the steps of: stopping said rubber kneader when it simultaneously receives an electric signal produced upon spending a desired total electric energy in relation to said shift coefficient and an additional electrical signal produced upon rotation to desired total revolutions involving said shift coefficient.
References Cited (Backward Citations)
US2452142A
Cited
US3951389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |