Method and apparatus for producing tubular glass article

Details Method and apparatus for producing tubular glass article Method and apparatus for producing tubular glass article

1981-12-21

1983-06-14

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, 65144, 65168, 118729, 118730, 427163, C03C 2502

Patent

active

043880940

ABSTRACT:
Disclosed are a method and apparatus for forming a continuous length of glass article. A coating of glass particles is deposited on a mandrel having a thermal coefficient of expansion much greater than that of the glass particles. The mandrel is allowed to cool, thereby causing it to shrink and separate from the coating. The coating is indexed a discrete longitudinal distance along the mandrel, thereby uncovering a region of the mandrel. Another coating of glass particles is deposited on the uncovered region of the mandrel and over a portion of the previously applied coating. The steps of separating or freeing the coating from the mandrel, longitudinally indexing the coating with respect to the mandrel and depositing another coating are repeated. Thus, each step of indexing longitudinally translates an incremental length of a porous body from the end of the mandrel.

REFERENCES:
patent: 3620704 (1971-11-01), Gray
patent: 4198223 (1980-04-01), Goell et al.
patent: 4310339 (1982-01-01), Blankenship

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