Patent ID: 8587785
Filing Date: 2013-11-19
Classification: B41F,G01N

Abstract:
1. A printing machine comprising a printing press liquid tank and a sample chamber disposed within the print liquid tank, the sample chamber monitoring the concentration of components of additives in a printing press liquid, comprising: a carrier element having an outer surface, a single inlet bore opening to the outer surface, a single outlet bore opening to the same outer surface, and an inner surface on an opposite side of the carrier element from the outer surface; a covering element having an outer surface, and an inner surface on an opposite side of the covering element from the outer surface; an intermediate element having first and second outer surfaces, and a measuring chamber open to both the first and second outer surfaces, the intermediate element being disposed between the carrier element and the covering element such that the inner surface of the carrier element is proximate the second outer surface of the intermediate element and the inner surface of the covering element is proximate the first outer surface of the intermediate element, wherein the covering element further comprises an optical guide bore passing through the covering element such that an optical guide component passes therethrough from the covering element to the measuring chamber in the intermediate element, wherein the carrying element further comprises an optical guide bore passing through the carrying element such that another optical guide component passes therethrough from the carrying element to the measuring chamber in the intermediate element, and first and second connecting elements, the first connecting element being operatively fluidly coupled to the carrier element and providing a process liquid to the measuring chamber through the inlet bore, the second connecting element being operatively fluidly coupled to the carrier element to discharge the process liquid provided into the measuring chamber through the outlet bore, wherein the measuring chamber is configured such that the only inflow to the measuring chamber is process liquid that flows through the inlet bore of the of the carrying element and the only outflow from the measuring chamber is discharge of the process liquid through the outlet bore of the carrying element, wherein a flow channel is formed by the measuring chamber in the intermediate element, the inner surface of the carrying element and the inner surface of the covering element, the thickness of the flow channel defines an optical path length and the flow channel has in a downstream direction within a place of the intermediate element an initial converging part, leading to an increase of flow velocity of process liquid provided therethrough, and thereby preventing deposits of particles and dirt within the flow channel.