compensate for a pressure drop in the housing interior as the valve assembly opens to allow more flow and results in the linear relationship between the piston position and the flow rate through the orifice application_number US 65372207 A description the following description is of the best mode presently contemplated for carrying out the invention this description is not to be taken in a limiting sense but is made merely for the purpose of describing one or more preferred embodiments of the invention the scope of the invention should be determined with reference to the claims a digital newspaper press inker assembly 10 according to the present invention is shown in fig1 the digital newspaper press inker assembly 10 includes a first ink line 12 providing a flow of ink into the digital newspaper press inker assembly 10 an inker assembly housing 20 a pump motor 14 a 90 degree gear box 16 a gear drive 17 linear stepper motors 26 second ink lines 28 and an ink rail 30 the housing comprising a stepper motor end portion 21 a center portion 22 an ink outlet end portion 24 and a manifold portion 23 the motor 14 is connected to the pumps 18 see fig2 through a gear box 16 and gear drive 17 the stepper motors 26 control valves residing in the housing 20 to control a flow of ink to the ink rail 30 while a stepper motor is preferred an inker assembly with another type of electrical linear actuator is intended to come within the scope of the present invention an example of a suitable linear actuator.