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Method for preparing relief image printing plates

  • US 5,147,761 A
  • Filed: 06/11/1990
  • Issued: 09/15/1992
  • Est. Priority Date: 06/11/1990
  • Status: Expired due to Term
First Claim
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1. A method for producing a high resolution latent relief image comprising the steps of:

  • positioning an image bearing negative transparency closely adjacent and substantially parallel to a layer of a photocurable material;

    positioning on the side of the negative transparency opposite said layer of photocurable material and substantially parallel thereto at least two louvers in series, each of said louvers having a plurality of open cells, each cell extending through the louver along an axis perpendicular to said negative transparency and having reflective cell walls contoured to reflect and redirect rays of radiant energy incident thereon to a direction more normal to the negative transparency surface, each of said louvers having different cell outlet areas; and

    passing radiant energy which is capable of curing said photocurable material through each of said louvers and said negative transparency and onto said layer of photocurable material for a time sufficient to form a latent relief image in said layer of photocurable material.

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