Seal for an ink rail device

摘要

The seal for a chamber doctor, at a printing press, is a body of an elastic rubber material inserted into a seal holder at the end of the chamber doctor. It has an angled lip (24) against the screen roller surface. The seal (20) has a second lip (24), forming a V-shape with the first lip with an included angle of 80degrees. The ends of the lips form support zones for the doctor blades, and the hardness of the lip material in the support zones increases towards the ends. The two lips have a V-shaped notch (34) following the concave center section, with a deeper and narrower groove (36) at the base. The lips are fitted with auxiliary lips (38) to lie against the screen roller when the main lips are bent strongly or are worn. The lip stiffness is adjusted by the cross section of the notch and the depth of the groove.