Plastic article or earthenware shaping or treating: apparatus – Diverse distinct type shaping means – Shaping orifice and either a downstream preform reshaping...
Patent
1997-09-11
2000-06-13
Vargot, Mathieu D.
Plastic article or earthenware shaping or treating: apparatus
Diverse distinct type shaping means
Shaping orifice and either a downstream preform reshaping...
2989521, 298953, 29282, 264 16, 264 27, 264284, 425363, 425377, 425385, 492 46, B29C 4700, B29C 5904, F28F 502
Patent
active
060741929
ABSTRACT:
A lenticular pattern forming roll, used for forming a lenticular screen, includes a chill roll and a lenticular sleeve positioned on the chill roll. The lenticular sleeve has a lenticular pattern formed on an outer surface for forming a corresponding lenticular pattern in a plastic sheet. The sleeve may be readily manufactured and transported to a desired location to be installed on the chill roll. The lenticular pattern forming roll may be readily used in combination with an extruder for extruding a hot plastic sheet to form the lenticular screen. The sleeve may also be removed from the chill roll and transported for resurfacing and without requiring transporting of the chill roll. The lenticular sleeve may preferably comprise a nickel-phosphorous composition defining at least a radially outermost portion of the sleeve in which the lenticular pattern is formed. More particularly, the nickel-phosphorous composition is preferably an amorphous nickel-phosphorous composition comprising nickel in a range of about 75 to 86 percent by weight, and phosphorous in a range of about 14 to 25 percent by weight. The nickel-phosphorous composition may be formed by electrodepositing or electroless depositing. The lenticular sleeve may be slit and flattened to define a flat lenticular body for molding a lenticular screen.
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