Patent US4516864A successfully refreshed from Google Patents.
US4516864A
Expired / Lapsed
US
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Non-contact sensing apparatus and method for polymer melt temperature profile determination
Assignee: General Electric Co
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Filing: 1982-12-27
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Granted: 1985-05-14
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Expires: 2002-12-27
Abstract
Abstract Remote measurement of temperature variations within polymer process melts is performed by irradiating the melt with a collimated radiation source such as laser light and relating the transmitted radiation to the temperature distribution within the melt. A method and apparatus for temperature profile determination is based upon the variation of light transmittance through the melt as a function of temperature and wavelength of the incident light.
Inventors
- 👤 Wontaik Kim
- 👤 Farzin H. Azad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/12; G01K11/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
163 words
An apparatus for temperature profile determination in flowing polymer melts comprising: a conduit section for flow-through transport of said melt; at least two optical windows disposed in said conduit section, said windows being disposed on opposite sides thereof; means for irradiating said polymer melt, through a first of said windows, with electromagnetic radiation of a select wavelength, so that said radiation is transmitted through said melt; means for detecting the level of radiation transmitted through said melt and through the second of said windows, said detecting means generating electrical signals responsive to the intensity of said transmitted radiation; means for providing temperature data with respect to the surface temperature of said melt, within said conduit, in the vicinity of at least one wall of said conduit windows; and computing means receiving electrical signals from said transmission detection means and operating thereon, along with said surface temperature data, so as to provide an indication of the temperature profile of said melt between said windows.
Claim 2
Independent Claim
163 words
An apparatus for temperature profile determination in flowing polymer melts comprising: a conduit section for flow-through transport of said melt; at least two optical windows disposed in said conduit section, said windows being disposed on opposite sides thereof; means for irradiating said polymer melt, through a first of said windows, with electromagnetic radiation of a select wavelength, so that said radiation is transmitted through said melt; means for detecting the level of radiation transmitted through said melt and through the second of said windows, said detecting means generating electrical signals responsive to the intensity of said transmitted radiation; means for providing temperature data with respect to the surface temperature of said melt, within said conduit, in the vicinity of at least one wall of said conduit windows; and computing means receiving electrical signals from said transmission detection means and operating thereon, along with said surface temperature data, so as to provide an indication of the temperature profile of said melt between said windows.
Claim 3
Dependent Claim
43 words
The apparatus of claim 1 in which said surface temperature data providing means comprises an infrared detecting device for generating electrical signals responsive to the temperature of said melt within said conduit in the vicinity of at least one of said optical windows.
Claim 4
Dependent Claim
30 words
The apparatus of claim 1 in which said infrared detecting means operates to generate electrical signals responsive to the temperature of said melt within said conduit between said optical windows.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 in which said means for irradiating comprises an infrared laser coupled to a first of said windows by fiber optic cable means.
Claim 6
Dependent Claim
31 words
The apparatus of claim 1 in which said irradiating means operates at a wavelength for which said melt is at least semi-transparent and for which said melt exhibits a temperature dependence.
Claim 7
Dependent Claim
18 words
The apparatus of claim 1 in which said irradiating means operates at a wavelength of approximately 3.0 microns.
Claim 8
Independent Claim
63 words
A method for temperature profile determination of a flowing polymer melt comprising: transmitting electromagnetic radiation of selection wavelength and intensity through said melt; measuring the intensity of the radiation transmitted through said melt; providing data with respect to the surface temperature of said melt; and determining using computer means, from said intensity measurement and said surface data, a temperature profile across said melt.
Claim 9
Independent Claim
63 words
A method for temperature profile determination of a flowing polymer melt comprising: transmitting electromagnetic radiation of selection wavelength and intensity through said melt; measuring the intensity of the radiation transmitted through said melt; providing data with respect to the surface temperature of said melt; and determining using computer means, from said intensity measurement and said surface data, a temperature profile across said melt.
Claim 10
Dependent Claim
37 words
The method of claim 7 in which said data providing step comprises: measuring the intensity of radiation emitted at a selected wavelength from said melt surface; and correlating said emitted intensity measurement with a surface temperature level.
Claim 11
Dependent Claim
22 words
The method of claim 7 in which the data providing step includes surface temperature data from opposite sides of said polymer melt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |