Patent JPS5220039A successfully refreshed from Google Patents.
Patent US4245517A successfully refreshed from Google Patents.
US4245517A
Expired / Lapsed
US
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Method and apparatus for measuring modulus of a plastic polymer
Assignee: Alpha Technologies Us Lp
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Filing: 1979-01-05
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Granted: 1981-01-20
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Expires: 1999-01-05
Abstract
Abstract The modulus of a plastic polymer is measured by extruding a strand of the polymer vertically downward through an orifice while accurately measuring the diameter of the strand, cutting off the strand and weighing it, and dividing the strand weight by the square of the difference in strand diameter to give a quotient representative of the modulus of the polymer. The method and apparatus are especially useful in measuring the green strength of a vulcanizable elastomer, so as to characterize its behavior during processing into a finished article.
Inventors
- 👤 Robert I. Barker
- 👤 Patrick F. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N33/00; G01N33/44; G01N33/445
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
The method of measuring the modulus of an extrudable material by the steps of: extruding a strand of the material essentially vertically downward through an orifice, measuring the diameter of the strand at either end of a segment of the strand to give top and bottom diameter values, weighing the segment, and dividing the segment weight by the square of the difference between the bottom diameter value and the top diameter value to give a quotient which is representative of modulus.
Claim 2
Independent Claim
81 words
The method of measuring the modulus of an extrudable material by the steps of: extruding a strand of the material essentially vertically downward through an orifice, measuring the diameter of the strand at either end of a segment of the strand to give top and bottom diameter values, weighing the segment, and dividing the segment weight by the square of the difference between the bottom diameter value and the top diameter value to give a quotient which is representative of modulus.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein the strand diameter is optically measured.
Claim 4
Dependent Claim
13 words
The method of claim 1, wherein the extrudable material is a vulcanizable elastomer.
Claim 5
Dependent Claim
12 words
The method of claim 3, wherein the elastomer contains a vulcanizing system.
Claim 6
Dependent Claim
140 words
Apparatus for measuring the modulus of a plastic material comprising, in combination, extruder means to extrude a plastic material, and including an orifice; said means positioned so that a strand of plastic material can be extruded vertically downward through said orifice, optical measuring means capable of measuring the diameter of a strand of plastic material extruded through said orifice, said measuring means positioned so as to measure strand diameter in a horizontal plane vertically below said orifice, said measuring means capable of measuring a plurality of diameter values in said plane, means to cut a strand of plastic material, said means positioned above the plane of said measuring means, and means to weigh a strand of plastic material comprising a pan to receive a cut strand, said pan positioned below the plane of said measuring means, and beneath the orifice.
Claim 7
Dependent Claim
140 words
Apparatus for measuring the modulus of a plastic material comprising, in combination, extruder means to extrude a plastic material, and including an orifice; said means positioned so that a strand of plastic material can be extruded vertically downward through said orifice, optical measuring means capable of measuring the diameter of a strand of plastic material extruded through said orifice, said measuring means positioned so as to measure strand diameter in a horizontal plane vertically below said orifice, said measuring means capable of measuring a plurality of diameter values in said plane, means to cut a strand of plastic material, said means positioned above the plane of said measuring means, and means to weigh a strand of plastic material comprising a pan to receive a cut strand, said pan positioned below the plane of said measuring means, and beneath the orifice.
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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |