专利名称：Tempering glass sheets by heat of
sublimation
发明人：NEELY, JR.; JAMES E.申请号：US46776674申请日：19740507公开号：US3929442A公开日：19751230
摘要：This invention relates to tempering glass sheets using the heat of sublimationof a sublimable cooling medium to help cool heated glass sheets sufficiently rapidly toimpart at least a partial temper thereto. The cooling medium is produced when a liquidstored in a refrigerated, pressurized condition in a closed system is applied to a systemof small apertures facing the opposite surfaces of a heated glass sheet and is impartedfrom said apertures toward said opposite surfaces as a mixture of soft, small, solidsublimable particles in an expanding gas of the cooling medium. Preferably, the coolingmedium contains carbon dioxide as the primary source of cooling, the apertures aredistributed in widely spaced relation to occupy less than 5% and preferably less than 1%of the area facing the glass surface during cooling. The closed delivery system comprisesa plurality of spaced apertured pipes that occupy a maximum of 25% of the area facingthe glass surface, thus leaving 75% of the area facing the glass surfaces free for exhaustpassages.
申请人：PPG INDUSTRIES, INC.
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