Kiln and method for heating and bending glass sheets

Details Kiln and method for heating and bending glass sheets Kiln and method for heating and bending glass sheets

1978-04-13

1979-03-13

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65111, 65162, 65350, 165142, 165174, 432205, C03B 2302

Patent

active

041440455

ABSTRACT:
Apparatus for thermally treating glass sheets comprising a combustion chamber, a kiln and a hot gas delivery system for delivering a mixture comprising combustion products into the kiln in such a manner as to avoid deviations from a substantially uniform temperature pattern across the kiln suitable for sag bending and annealing glass sheets.
The delivery system comprises a delivery pipe, means for dividing said mixture into two approximately equal flows of said mixture for supplying said flows through a pair of branch pipes, then through the length of a pair of manifolds, each comprising an open ended inner pipe, and a concentric apertured outer pipe. The outer pipes have upwardly directed nozzles of substantially equal cross-section located at approximately uniformly spaced intervals along their length. The mixture flows into the kiln upwardly from said nozzles at a substantially uniform temperature along the length of the outer pipes and blends with the kiln atmosphere to provide a more uniform temperature pattern than is obtained from prior art kiln temperature control systems.

REFERENCES:
patent: 2008007 (1935-07-01), Dreffein
patent: 2133784 (1938-10-01), Merrill
patent: 2218654 (1940-10-01), Paddock
patent: 2463996 (1949-03-01), Polk
patent: 3295843 (1967-01-01), McMaster et al.
patent: 3551130 (1970-12-01), McMaster

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