US3734659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive means for material compacting apparatus
Assignee: KG Ind Inc
•
Filing: 1972-02-16
•
Granted: 1973-05-22
•
Expires: 1992-02-16
Abstract
Abstract A material compacting apparatus including opposed compacting rolls mounted for lateral displacement to vary the spacing between the rolls depending upon the pressure exerted during compacting. A hopper is positioned above the rolls for holding the material, and a feed screw is located within the hopper for feeding the material to the rolls. Control means are provided for varying the driving action of the feed screw with the variations depending upon any tendency of the pressure applied by the rolls to vary. The feed screw is hydraulically or electrically driven and signals are applied to the drive means for varying the feed screw pressure. Variations in the driving force of the feed screw are designed to offset the forces tending to vary the spacing between the rolls whereby a constant roll spacing, and therefore a product of constant thickness can be achieved.
Inventors
- 👤 L Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:02
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/005; B30B11/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
In a material compacting apparatus including opposed compacting rolls, said rolls being mounted for lateral displacement relative to each other whereby the spacing between the rolls will vary depending upon the pressure exerted during compacting of material between the rolls, and a feed screw for feeding material to said rolls, the Improvement comprising means for maintaining the spacing between said rolls at a substantially constant distance comprising an electric motor for driving said feed screw, a control for said motor, process control means for varying the input applied by said control to said motor, means for detecting variations in the pressure exerted by said rolls on the material between the rolls, means for measuring the degree of variation, means for translating the degree of variation into a proportional output and means for applying said proportional output to said process control means for varying the input of said control to said motor to thereby vary the operation of said motor whereby the pressure applied by said feed screw will vary directly with changes in pressure between the rolls.
Claim 2
Dependent Claim
177 words
In a material compacting apparatus including opposed compacting rolls, said rolls being mounted for lateral displacement relative to each other whereby the spacing between the rolls will vary depending upon the pressure exerted during compacting of material between the rolls, and a feed screw for feeding material to said rolls, the Improvement comprising means for maintaining the spacing between said rolls at a substantially constant distance comprising an electric motor for driving said feed screw, a control for said motor, process control means for varying the input applied by said control to said motor, means for detecting variations in the pressure exerted by said rolls on the material between the rolls, means for measuring the degree of variation, means for translating the degree of variation into a proportional output and means for applying said proportional output to said process control means for varying the input of said control to said motor to thereby vary the operation of said motor whereby the pressure applied by said feed screw will vary directly with changes in pressure between the rolls.
Claim 3
Dependent Claim
26 words
An apparatus in accordance with claim 1 wherein the pressure exerted by said rolls on said material is determined by measuring the spacing between said rolls.
Claim 4
Dependent Claim
28 words
An apparatus in accordance with claim 1 wherein the pressure exerted by said rolls on the material is measured by determining the torque applied to said feed screw.
Claim 5
Dependent Claim
34 words
An apparatus in accordance with claim 1 including a motor for driving said rolls, and wherein the pressure exerted by said rolls on said material is measured by determining the load on said motor.
Claim 6
Dependent Claim
48 words
An apparatus in accordance with claim 4 wherein the load on said roll motor is determined by applying a current signal transducer to the electrical supply for said roll motor, the output of said current signal transducer being applied to means adapted to apply signals to said controller.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |