Abstract: An ETR printing unit has electrodes and an ETR print head. A configuration for triggering the ETR print head includes a controllable energy source supplying energy for various pixels of a printed image to the electrodes of the ETR printing unit. A switching unit is provided through which the controllable energy source acts upon the electrodes temporarily connected to the energy source with a voltage or with a constant current, having a magnitude with a dependency on a temporarily different number of electrodes for supplying a larger number of electrodes with a higher voltage or a higher constant current than a lesser number would be. A microprocessor control unit for the ETR printing unit supplies the controllable energy source with a control signal corresponding to a dependency on the number of the triggered electrodes, for specifying the number of electrodes temporarily connected to the controllable energy source. A memory is connected to the microprocessor control unit.

Abstract: An apparatus for changing the text portion of logos for postage meters includes a printer module for a fully electronically produced postage meter imprint having an advertising logo, at least one input, a display unit, an input/output control module, a nonvolatile memory for at least unchanging parts of the postage meter imprint, a control device, and a printer control for producing a printed pattern having been formed by a microprocessor-controlled printing process immediately prior to printing of fixed data and current data and being available in buffer-stored form. A first memory region is provided for storing data for the unchanging parts of the postage meter imprint applying at least to a frame of an advertising logo, and an associated name identifying the logo frame. A second memory region is provided for storing data for variable parts of the postage meter imprint applying to at least one logo text portion, and an associated name identifying the logo text portion.