Abstract: Aspects of the present disclosure are directed to a cleaning apparatus for cleaning printing plates. In some embodiments, the cleaning apparatus may comprise a laser arrangement including a pulsed laser for generating laser pulses with pulse duration in the picosecond range. The cleaning apparatus may further comprise laser guidance means for guiding the laser pulses onto a path on a printing plate. Other aspects of the present disclosure are directed to a method including the steps of generating laser pulses with pulse duration in the picosecond range and guiding the laser pulses onto a path on the printing plate.

Abstract: Tempering apparatus having disc-free stirring tool (8) with plate-shaped arms (12, 13). The upper side (14) of each arm (12) has a different geometrical configuration than the lower side (19) thereof. Each neighbouring arm (13) has the opposite configuration of the upper and lower sides (23 and 24). The mass is thereby given an intermittent up- and downwards movement in the mass treatment chamber (2) and the tempering capacity of the apparatus is improved.

Abstract: Tempering apparatus having disc-free stirring tool (8) with plate-shaped arms (12, 13). The upper side (14) of each arm (12) has a different geometrical configuration than the lower side (19) thereof. Each neighbouring arm (13) has the opposite configuration of the upper and lower sides (23 and 24). The mass is thereby given an intermittent up- and downwards movement in the mass treatment chamber (2) and the tempering capacity of the apparatus is improved.