Patent ID: 8192654
Filing Date: 2012-06-05
Classification: B29C,B29D,B29L

Abstract:
1. A method of producing an extruded lenticular sheet having a uniform pitch comprising the steps of: providing a substrate of transparent material having a first side and a second side and an index of refraction greater than one; and forming a plurality of lenses on the first side of the substrate, wherein each lens of the plurality of lenses has a pitch that is substantially equal to the remainder of the plurality of lenses, said substantially equal pitches being produced by determining the total shrinkage across the lenticular sheet to be produced; determining the total number of lenticules to be engraved across the width of the cylinder; determining the average shrinkage per lenticule; determining the pitch of each inverse lenticule to be engraved, inverse engraving a variable and incremental lens pattern into an engraving cylinder from which the lenticular sheet having the substantially equal pitch lenses is produced, and producing the lenticular sheet having the substantially equal pitch lenses from the engraved cylinder.