TREA

Infra-red generation

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Information

  • Patent Grant
  • 4830651
  • Patent Number
    4,830,651
  • Date Filed
    Monday, January 4, 1988
    37 years ago
  • Date Issued
    Tuesday, May 16, 1989
    35 years ago
  • Inventors
  • Examiners
    • Kellogg; Arthur
    Agents
    • Connolly & Hutz
Information
Abstract
Improved burner constructions for gas-fired infra-red generators having ceramic fiber matrix through the thickness of which gaseous combustion mixture is passed and as it emerges it is burned to heat emerging surface to incandescene. Burner matrix can be loaded with silicon carbide particles to improve its emissivity, can be made water repellent and its uniformity can be improved. Burner body can be casting, with sheet metal addition to form a baffle and air seal and to grip matrix edges. Combustion mixture plenum can have movable partition assembly separating it from air seals, to adjust portion of matrix at which incandescene is generated. Metal screen can be stretched in front of incandescent surface to assist with low-temperature operation. Large size matrix can have central support fitted and secured to back of burner body. Air seal can be provided by narrow curtain of air extending around internal faces of burner body. Annealing lehr is desirably provided with gas-fired infra-red irradiation, and can have heat losses reduced by diminishing amount of metal used as in a conveyor to move workpieces through.
Description
Claims
  • 1. In the method of heating up glass articles in a glass lehr, the improvement according to which the glass is heated by a downwardly firing gas-fired matrix type burner.
  • 2. The combination of claim 1 in which the matrix type burner has a fibrous matrix the radiant face of which contains about 5% to about 34% finely divided silicon carbide.
  • 3. The combination of claim 1 in which the gas-fired matrix burner generates high intensity infra-red radiation as well as substantial amounts of hot combustion gas which rises to the top of the lehr, and the glass articles are moved through the bottom of the lehr.
  • 4. The combination of claim 3 in which the glass articles are moved through a lehr section containing hot combustion gases without material exposure to the radiation from the burner, and then the articles are moved through a lehr section in which they are also subjected to the high intensity infra-red radiation.
Parent Case Info

The present application is a continuation-in-part of applications Ser. No. 831,795 filed Feb. 19, 1986 (U.S. Pat. No. 4,722,681 granted Feb. 2, 1988) and Ser. No. 771,722 filed Sept. 3, 1985, which in turn are direct or chained continuations-in-part of the following earlier applications: The present invention relates primarily to apparatus and methods for treating substrates such as webs of paper, textile and non-wovens, which are manufactured in long lengths and are heat treated during or after their manufacture. Among the objects of the present invention is the provision of novel apparatus and methods for effecting such heat treatment. The foregoing as well as still further objects of the present invention will be ore fully appreciated from the following description of several of its exemplifications, reference being made to the accompanying drawings wherein:

US Referenced Citations (2)
Number Name Date Kind
3300290 Misson Jan 1967
3607173 McMaster et al. Sep 1971
Non-Patent Literature Citations (1)
Entry
Australia Adopts Faster P/E Firing, Jun. 80, "Ceramic Industry/49" copy in 65/119, by John Geary.
Continuation in Parts (13)
Number Date Country
Parent 831795 Feb 1986
Parent 752408 Jul 1985
Parent 628989 Jul 1984
Parent 592793 Mar 1984
Parent 509161 Jun 1983
Parent 567270 Dec 1983
Parent 435412 Oct 1982
Parent 312730 Oct 1981
Parent 292167 Aug 1981
Parent 279081 Jun 1981
Parent 238418 Feb 1981
Parent 186491 Sep 1980
Parent 952332 Oct 1978