US3858857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed control mechanism
Assignee: Monsanto Co
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Filing: 1973-05-29
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Granted: 1975-01-07
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Expires: 1993-05-29
Abstract
Abstract A mechanical feed control for a device having a rotating member for working material in shear is described which controls the feed rate of incoming material in response to accumulation of material above the rotating member.
Inventors
- 👤 Ernest S Ulm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:21
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/288; B29C48/2888; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/60; B29B7/74; B29B7/7476; B29B7/7495; B29C48/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
51 words
Feed control mechanism for plastic material which comprises pressure exerting means to exert pressure on an incoming strip of material, pressure sensing means disposed to be subjected to pressure from buildup of material and pressure transfer means to transfer pressure to said pressure exerting means in response to the pressure sensed.
Claim 2
Dependent Claim
51 words
Feed control mechanism for plastic material which comprises pressure exerting means to exert pressure on an incoming strip of material, pressure sensing means disposed to be subjected to pressure from buildup of material and pressure transfer means to transfer pressure to said pressure exerting means in response to the pressure sensed.
Claim 3
Dependent Claim
102 words
Feed control mechanism for plastic material which comprises supporting bracket, pressure sensing means on a pivotal assembly supported by the bracket and disposed to be subjected to pressure from buildup of material, pressure exerting means comprising first and second elements to exert pressure on an incoming strip of material in response to the pressure sensing means, the first element of the pressure exerting means being on the same pivotal assembly as the pressure sensing means and the second element being independently pivotally connected to the supporting bracket, and means to maintain said second element in substantially fixed relationship to the supporting bracket.
Claim 4
Dependent Claim
102 words
Feed control mechanism for plastic material which comprises supporting bracket, pressure sensing means on a pivotal assembly supported by the bracket and disposed to be subjected to pressure from buildup of material, pressure exerting means comprising first and second elements to exert pressure on an incoming strip of material in response to the pressure sensing means, the first element of the pressure exerting means being on the same pivotal assembly as the pressure sensing means and the second element being independently pivotally connected to the supporting bracket, and means to maintain said second element in substantially fixed relationship to the supporting bracket.
Claim 5
Dependent Claim
45 words
The mechanism of claim 2 in which the first and second elements of the pressure exerting means are a roll and planar surface, the roll acting against the planar surface through the incoming strip of material and the pressure sensing means is a rigid bar.
Claim 6
Dependent Claim
79 words
System for subjecting a material to shearing forces under controlled feed conditions comprising at least one rotating member for imposing shearing force on the material, pressure sensing means disposable above the area of material contact with the rotating member, pressure transfer means for transferring pressure sensed from accumulation of material above said area of material contact to pressure exerting means, and pressure exerting means for exerting pressure on an incoming strip of material in response to the pressure sensed.
Claim 7
Dependent Claim
79 words
System for subjecting a material to shearing forces under controlled feed conditions comprising at least one rotating member for imposing shearing force on the material, pressure sensing means disposable above the area of material contact with the rotating member, pressure transfer means for transferring pressure sensed from accumulation of material above said area of material contact to pressure exerting means, and pressure exerting means for exerting pressure on an incoming strip of material in response to the pressure sensed.
Claim 8
Dependent Claim
74 words
System of claim 4 in which the rotating member is the screw of an extruder, the pressure sensing means is a member of a pivotal assembly of which a first element of the pressure exerting means is a member, said assembly being pivotally attached to a stationary bracket secured to the extruder and means are provided to maintain a second element of the pressure exerting means in substantially fixed relationship to the stationary bracket.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |