Patent ID: 8088054
Filing Date: 2012-01-03
Classification: B31B,B31F,D21H,Y10T

Abstract:
1. A method for forming a reverse folding score on a sheet material, comprising: supplying the sheet material between a scoring rule and an anvil, the scoring rule comprising a pair of score members each comprising a scoring surface portion with an individually asymmetrical flat outer surface extending at an angle, the scoring members integrally formed with a base portion joined to a die board of a die roll of a rotary press, and the anvil comprising a compressible rubber-type material joined to an anvil roll of the rotary press; compressing the sheet material between the scoring rule and the anvil, wherein upon compressing the sheet material, the pair of score members press against a first side of the sheet material such that the pair of scoring surface portions cause a pair of reverse fold score lines to be formed on the first side of the sheet material, the score lines comprising a complementary shape to the scoring surface portions such that the score lines each comprise an individually asymmetrical surface, and as the scoring rule engages the sheet material, a second, opposite side of the sheet material is compressed against the anvil such that the rubber-type material of the anvil bulges towards the sheet material and forces the sheet material into an area between the pair of score members causing a reverse fold channel to be formed on the second, opposite side of the sheet material; and removing the sheet material having the pair of reverse fold scoring lines each with the individually asymmetrical surface and the reverse fold channel formed thereon from the scoring rule and the anvil.