Apparatus for press shaping hot glass sheets

Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing

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Details

65106, 65273, C03B 23023

Patent

active

045390312

ABSTRACT:
Apparatus for handling hot glass sheets comprises a rigid ring-like member of a composition that causes rejectable defects in a bent glass sheet when it contacts the hot glass sheet directly. Insulating material that does not mar the glass sufficiently to cause rejectable defects is used to cover the rigid member. However, no material known to date lasts forever. The present invention provides screen mesh reinforcement means within the thickness of the glass sheet engaging member to produce fine marks that do not cause rejection of the finished article to warn operating personnel to replace the hot glass sheet engaging member with a fresh hot glass sheet engaging member before the hot glass sheet engaging member becomes worn to the extent that the rigid member causes a rejectable defect. Clamping means is provided to replace a worn glass engaging member rapidly. Optionally, a cushion of fibrous ceramic material is interposed between the rigid member and the hot glass sheet engaging member to enable the glass engaging surface of the hot glass sheet engaging member to conform to the downwardly facing shaping surface of an upper vacuum mold.

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