There is disclosed a hand-held portable printer having an internal antenna, convertible to an RFID printer capable to receiving RFID data from a scanner coupled to the printer. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. Well regions are formed in the semiconductor substrate. The container closure also has a rotary element which can be rotated about a vertical axis relative to the closure lever in order to form a stop with the closure lever in a blocking position and thereby to block the closure lever in its opening position and to allow the closure lever to pivot between the closure position and the opening position in a release position. An installation method for installing a brush holder of an electrical machine is also disclosed.