Method of molding a urethane reflector
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United States of America Patent
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-
May 31, 1988
Grant Date -
N/A
app pub date -
Oct 7, 1985
filing date -
Oct 7, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for molding a reflector of light-transmissive urethane, with a retroreflective pattern of a multiplicity of angled facets at the back surface of the reflector. In a mold cavity for the reflector there is provided a mold portion shaped to form the multiplicity of angled facets. Prior to filling of the mold, there is applied to the mold portion temporarily a transfer coating of a material which will maintain the angled facets reflective in a urethane reflector. A releasing agent is applied to the remainder of the mold other than the subject mold portion, then the mold is filled with urethane material. Once the urethane material has set, the mold is opened and the molded urethane is stripped off the special mold portion, leaving the transfer coating, which acts as a release coating, adhered to the angled facets.
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