Patent ID: 6012389
Filing Date: 2000-01-11
Classification: B41F

Abstract:
An ink fountain for a rotary offset printing press comprising:an ink dosing device;an ink fountain roller disposed adjacent to said ink dosing device;an ink supply disposed to provide ink to said ink dosing device;said ink dosing device comprising at least one dosing element;said at least one dosing element comprising a substantially flat portion and a substantially rounded portion;said ink dosing device having a portion immediately adjacent said ink fountain roller;said substantially flat portion of said at least one dosing element being disposed upstream of said portion of said ink dosing device immediately adjacent said ink fountain roller;said substantially flat portion being configured to be disposed adjacent the flow of ink from said ink supply to said ink fountain roller;a wiper edge being disposed at a conjunction of said substantially flat portion and said substantially rounded portion;said wiper edge being disposed substantially adjacent said ink fountain roller;said ink fountain being configured to permit ink to flow substantially adjacent said ink fountain roller from a side upstream of said wiper edge to a side downstream of said wiper edge;a section of said rounded portion of said at least one dosing element defining a tangent substantially at said wiper edge;a section of said substantially flat portion substantially adjacent said wiper edge lying on a secant of said rounded portion; andsaid secant being disposed to form an acute angle with respect to the tangent, the acute angle being disposed substantially on the upstream side of said edge and substantially between said ink fountain roller and said at least one dosing element.