Methods for manufacturing articles from sheets of unhardened hydraulically settable compositions
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United States of America Patent
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-
Jun 16, 1998
Issued Date -
N/A
app pub date -
Aug 10, 1993
filing date -
Aug 11, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods and systems for readily and economically manufacturing hydraulically settable articles, particularly containers, from microstructurally engineered hydraulically settable mixtures wherein the mixture is extruded into a sheet that is feed through a plurality of sets of rollers so as to form the sheet into the desired thickness. The sheet is then pressed between a male die of a desired shape and a female die having a substantially complimentary configuration of the male die shape to immediately fashion a portion of the sheet into a form stable shape for the desired article. To assist in imparting form stability, the dies can be heated or cooled. Once the article has obtained form stability, the article is removed from the dies and dried under heated air to gain strength. The article can then be cut from the sheet and receive printing or a coating, if desired, prior to packaging, shipping, and use.
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