Patent US3879164A successfully refreshed from Google Patents.
US3879164A
Expired / Lapsed
US
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Method of isothermally heating articles with radiation
Assignee: AT&T Inc
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Filing: 1974-07-11
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Granted: 1975-04-22
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Expires: 1994-07-11
Abstract
Abstract To uniformly heat a surface with a source of radiation, the surface having varying thermal heating characteristics in response to irradiation, a filter having radiation absorption characteristics which vary in accordance with the thermal heating characteristics of the surface is positioned between the surface and the source of radiation, such that areas of the filter which have a maximum radiation absorption characteristic overlie areas of the surface which experience maximum thermal heating in response to radiation, and vice versa. Radiation passing through the filter and impinging on the surface is modulated in accordance with the thermal heating characteristics of the surface to uniformly, or isothermally, heat the surface.
Inventors
- 👤 Peter Haldopoulos
- 👤 Yemmanur Jayachandra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:55
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/28; F26B3/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
In a method of isothermally heating a surface of an article, areas of the surface having varying heating characteristics in response to irradiation: projecting a beam of radiant energy across the surface of the article; imparting relative movement between the radiant heat beam and the article to scan and heat the surface of the article with the beam, and filtering the radiation in the beam scanned across the surface of the article to selectively decrease the intensity of the radiant energy impinging on areas of the surface to heat each area of the surface to the same temperature to isothermally heat the surface of the article.
Claim 2
Dependent Claim
106 words
In a method of isothermally heating a surface of an article, areas of the surface having varying heating characteristics in response to irradiation: projecting a beam of radiant energy across the surface of the article; imparting relative movement between the radiant heat beam and the article to scan and heat the surface of the article with the beam, and filtering the radiation in the beam scanned across the surface of the article to selectively decrease the intensity of the radiant energy impinging on areas of the surface to heat each area of the surface to the same temperature to isothermally heat the surface of the article.
Claim 3
Dependent Claim
106 words
In a method of isothermally heating a surface of an article, areas of the surface having varying heating characteristics in response to irradiation: projecting a beam of radiant energy across the surface of the article; imparting relative movement between the radiant heat beam and the article to scan and heat the surface of the article with the beam, and filtering the radiation in the beam scanned across the surface of the article to selectively decrease the intensity of the radiant energy impinging on areas of the surface to heat each area of the surface to the same temperature to isothermally heat the surface of the article.
Claim 4
Dependent Claim
106 words
In a method of isothermally heating a surface of an article, areas of the surface having varying heating characteristics in response to irradiation: projecting a beam of radiant energy across the surface of the article; imparting relative movement between the radiant heat beam and the article to scan and heat the surface of the article with the beam, and filtering the radiation in the beam scanned across the surface of the article to selectively decrease the intensity of the radiant energy impinging on areas of the surface to heat each area of the surface to the same temperature to isothermally heat the surface of the article.
Claim 5
Dependent Claim
70 words
In a method of uniformly heating a surface of an article with a source of radiation, areas of the surface having varying thermal heating characteristics in response to irradiation: irradiating the surface, and filtering the radiation impinging on the surface to selectively decrease the intensity of the radiation impinging on areas of the surface to heat each area of the surface to the same temperature to uniformly heat the surface.
Claim 6
Dependent Claim
70 words
In a method of uniformly heating a surface of an article with a source of radiation, areas of the surface having varying thermal heating characteristics in response to irradiation: irradiating the surface, and filtering the radiation impinging on the surface to selectively decrease the intensity of the radiation impinging on areas of the surface to heat each area of the surface to the same temperature to uniformly heat the surface.
Claim 7
Dependent Claim
90 words
In a method of isothermally heating a surface having a plurality of diverse items positioned thereon, wherein areas of the surface and the items have varying heating characteristics in response to irradiation: directing radiant energy toward the surface and items, and filtering the radiant energy impinging on the surface and items to selectively decrease the intensity of the radiant energy impinging on areas of thE surface and items to heat each area of the surface and the items to the same temperature to isothermally heat the surface and the items.
Claim 8
Dependent Claim
90 words
In a method of isothermally heating a surface having a plurality of diverse items positioned thereon, wherein areas of the surface and the items have varying heating characteristics in response to irradiation: directing radiant energy toward the surface and items, and filtering the radiant energy impinging on the surface and items to selectively decrease the intensity of the radiant energy impinging on areas of thE surface and items to heat each area of the surface and the items to the same temperature to isothermally heat the surface and the items.
Claim 9
Dependent Claim
36 words
In a method as set forth in claim 3, wherein one of the diverse items is fusible upon being subjected to radiation of a predetermined intensity, and the filtering step passes radiation of the predetermined intensity.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |