Patent ID: 9435511
Filing Date: 2016-09-06
CPC Classification: B29D,F21S,F21V,F21Y

Claim Text:
1. For making an elongated polycarbonate lens having transverse corrugations with crests and nadirs at a predetermined interval, a method comprising the steps of: starting with a roll of flat polycarbonate stock; unrolling the flat polycarbonate stock in sequential increments into a press having a die contoured to impress the transverse corrugations with crests and nadirs at a predetermined interval; pressing each increment unrolled into the die press to impress the transverse corrugations with crests and nadirs at a predetermined interval into the increment; relaxing the press to release the pressed increment and receive the next unrolled increment of polycarbonate stock; and winding the released increments of pressed polycarbonate stock onto a coiler as they exit the press.