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US3607170A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for continuously manufacturing foam glass

Assignee: STATNI VYZKUMMY USTAV SKLARSKE
•
Filing: 1968-05-08
•
Granted: 1971-09-21
•
Expires: 1988-05-08
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Abstract

Abstract A method and apparatus for manufacturing foam glass from a mixture of glass powder and a foaming agent. The mixture is initially preheated in a nonoxidizing atmosphere while being advanced in a given direction through a preheating zone of a tunnel kiln. The nonoxidizing atmosphere in the preheating zone of the tunnel kiln is withdrawn from the latter in countercurrent to the direction of movement of the mixture therethrough, and nonoxidizing burning takes place through burners capable of carrying out nonoxidizing burning in the immediate vicinity of the region where the mixture of glass powder and foaming agent is initially delivered to a conveyor band which conveys the mixture through the preheating zone to be received thereafter in a foaming zone. The kiln preferably includes a partition means situated between the preheating and foaming zones and at the inlet of the kiln there is a discharge outlet through which the atmosphere of the preheating zone is withdrawn. A supply means extends downwardly through the discharge outlet to supply the mixture to the conveyor band.

Inventors

  • 👤 Jaromir Malesak

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 10:18
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/08; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B3/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 75 words
The combination of claim 1 and wherein said supply means includes at least one supply tube extending through said discharge outlet of said kiln, a hopper communicating with the top end of said supply tube, an elongated rotary shaft extending downwardly through said hopper and along the interior of said tube and carrying wipers in said tube for wiping the interior surface thereof, and blades in said hopper for stirring the mixture in said hopper.
Claim 2
Dependent Claim 65 words
The combination of claim 2 and wherein said tube terminates at its bottom end in a discharge mouth through which the mixture flows onto said conveyor band, and a further burner means is located closely adjacent to said moUth over said conveyor band for providing nonoxidizing burning, said further burner means also extending transversely across said conveyor band, and having a downwardly directed burner mouth.
Claim 3
Dependent Claim 57 words
The combination of claim 3 and wherein said supply means includes a plurality of said tubes having a common hopper said tubes being situated beside each other in said discharge outlet of said tunnel kiln, a rotary shaft being situated in each of said plurality of tubes carrying wipers in said tubes and blades in said hopper.
Claim 4
Dependent Claim 28 words
The combination of claim 1 including partition means between said preheating and foaming zones, and means for vertically adjusting said partition above the upper run of said conveyor.
Claim 5
Dependent Claim 142 words
In a method for the continuous manufacture, in a tunnel kiln, of a length of foam glass from a mixture of glass powder and a foaming agent, comprising passing said mixture through a preheating zone heated by burning a combustible mixture producing nonoxidizing waste gases then feeding said mixture onto a conveyor in said kiln, and heating said mixture to a temperature so that the mixture first sinters then fuses and foams, the improvement comprising, feeding said mixture downwardly through said preheating zone, to the inlet of said kiln, passing the exhausted streams of waste gases produced by nonoxidizing burning upwardly about said mixture and countercurrent to the direction of feed maintaining said streams of gases out of direct contact with said mixture in said preheating zone and until it reaches the conveyor, said mixture being heated by said gases without oxidizing.

References Cited (Backward Citations)

US2354807A Cited
US2322581A Cited
US2937938A Cited
US3300289A Cited
US3361550A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-09-20 1975-03-22 1975-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-09-20 1979-03-22 1979-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-09-20 1983-03-22 1983-09-21 $7700.00 Window Closed / Lapsed

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