An electron source producing apparatus for forming an electron-emission part on a conductive member disposed on a substrate in an atmosphere containing a desired gas. A supplied amount of matting agent at a surface of a metering roller is metered by a metering blade, and an excess amount is filtered at a slit portion. The stator elements and the rotor elements are mounted to interact magnetically to exert a force sufficient to move the rotor elements. In the closed position, two sets of flexible electrically conductive shorting teeth mesh with a first set of flexible electrically conductive signal teeth and the second set of flexible electrically conductive signal teeth creating a conductive path between the two signal contacts. The casing is provided, at the front side, with an opening for inserting a retaining clip arranged at the further part. A policy management apparatus 1 comprises a processing unit and a policy rule table 151 that stores at least one policy rule for each component of a computer system.