Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1996-10-03
1998-06-02
Dixon, Merrick
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
264220, 264335, 264 16, 264 19, 76 4, 761071, 29411, 29425, 29445, B29C 3340
Patent
active
057594686
ABSTRACT:
A cube corner article and method of manufacturing the article from a series of unitary substrates. A plurality of pins are assembled to form a mold having an array of cube corner elements on a surface. Then, a replica of the cube corner element array is produced in a substrate suitable for forming retroreflective surfaces. Portions of the replica substrate material are removed. The removal of these portions forms at least one cavity bounded by side walls in the replica at a depth at least that of the cube cube corner elements. The replica is replicated to produce an additional directly machinable substrate suitable for forming retroreflective surfaces having at least one raised section having sidewalls at a height at least that of the cube corner elements. At least one raised section is directly machined to form an array of cube corner elements.
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Benson Gerald M.
Smith Kenneth L.
Caven Jed W.
Dixon Merrick
Jensen Stephen C.
Jordan Robert H.
Minnesota Mining and Manufacturing Company
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