US4096739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processability tester
Assignee: Alpha Technologies Us Lp
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Filing: 1977-08-17
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Granted: 1978-06-27
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Expires: 1997-08-17
Abstract
Abstract Evaluating extrudable material by forcing such material through an outlet of a chamber by means of a movable member then stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Inventors
- 👤 Robert I. Barker
- 👤 David P. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:51
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet and moving said member to force material from the outlet, the improvement which comprises stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 2
Dependent Claim
67 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet and moving said member to force material from the outlet, the improvement which comprises stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 3
Dependent Claim
81 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet the improvement which comprises in combination moving said member at a substantially constant rate to force material from the outlet, measuring the force required to extrude the material stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 4
Dependent Claim
81 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet the improvement which comprises in combination moving said member at a substantially constant rate to force material from the outlet, measuring the force required to extrude the material stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 5
Dependent Claim
84 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet the improvement which comprises in combination moving said member at a substantially constant force to force material through the outlet, measuring the time required to extrude a predetermined volume of material stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 6
Dependent Claim
84 words
In the method of evaluating an extrudable material by charging a supply of such material to a chamber having an outlet and movable member for forcing the material through the outlet the improvement which comprises in combination moving said member at a substantially constant force to force material through the outlet, measuring the time required to extrude a predetermined volume of material stopping and securing the movable member at a predetermined position and measuring the force on the material as it decays with time.
Claim 7
Dependent Claim
72 words
In the method of evaluating an extrudable material by charging such material to a cylindrical chamber to which is attached an elongated circular outlet of smaller radius than the radius of the chamber and moving said member to force material from the outlet, the improvement which comprises stopping and securing the movable member at a predetermined position and measuring the force on the material in the chamber as it decays with time.
Claim 8
Dependent Claim
72 words
In the method of evaluating an extrudable material by charging such material to a cylindrical chamber to which is attached an elongated circular outlet of smaller radius than the radius of the chamber and moving said member to force material from the outlet, the improvement which comprises stopping and securing the movable member at a predetermined position and measuring the force on the material in the chamber as it decays with time.
Claim 9
Dependent Claim
61 words
Apparatus for evaluating an extrudable material comprising in combination a supply chamber having an outlet and a movable member for forcing material through the outlet, means for moving said member to force material from the outlet, means for stopping the movable member and locking it in its place at a predetermined position and means for measuring the stress on the material.
Claim 10
Dependent Claim
61 words
Apparatus for evaluating an extrudable material comprising in combination a supply chamber having an outlet and a movable member for forcing material through the outlet, means for moving said member to force material from the outlet, means for stopping the movable member and locking it in its place at a predetermined position and means for measuring the stress on the material.
Claim 11
Dependent Claim
18 words
Apparatus of claim 5 which includes means automatically to present samples of test material to the supply chamber.
Claim 12
Dependent Claim
16 words
Apparatus of claim 5 which includes means to determine the average rate of the stress decay.
Claim 13
Dependent Claim
22 words
Apparatus of claim 5 which includes means for moving said member at a plurality of preselected different substantially constant rates or forces.
Claim 14
Dependent Claim
16 words
Apparatus of claim 5 which includes means to compare time or stress values with preselected limits.
Claim 15
Dependent Claim
49 words
Apparatus of claim 5 in which the supply chamber is cylindrical and the outlet is an elongated circular member of smaller radius than the radius of the chamber and the means for measuring the stress on the material is a stress transducer which senses force in the cylindrical chamber.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |