Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Continuous or indefinite length
Patent
1982-09-30
1984-10-23
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Continuous or indefinite length
204 4, 204 9, 264 19, 264 25, 264 27, 264220, 264227, 264335, 425385, 425437, B29D 1100
Patent
active
044787693
ABSTRACT:
Cylindrical embossing tools are constructed from one or more masters formed by accurately scribing the face of a substrate along three axes in the face to produce a pattern of tetrahedrons. The plurality of masters, or replicated copies made from a single master, are assembled in a fixture and seamless copies are made by electrodeposition of nickel using various shielding and grinding methods to provide replicated copies of uniform thickness. The replicated copies are assembled and used to form larger electroforms until a generally cylindrical embossing tool of the correct width and circumference is created. Novel processes and apparatus are provided for removing the electroformed cylindrical tool from its mother cylinder.
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Montalbano Anthony J.
Pricone Robert M.
Amerace Corporation
Fischbach V.
Lowe James
Sandler Ronald A.
Teschner David
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