in the art and thus do not appear to warrant further discussion herein however fig1 b schematically illustrates the provision of a suitable slow rotation drive 400 for this purpose while cylinder 1 wash up roller 2 and metering roller 4 will preferably be simultaneously driven by a given arrangement of drive and drive connections 500 conceivably a slow rotation driving arrangement 400 could be provided in conjunction with a ratchet arrangement 11 12 such as that described heretofore and illustrated in fig1 with the proviso that the ratchet wheel 12 and wiper roller 5 could be continuously driven over predetermined increments of angular displacement at slow speed with given intervals of time between the increments conceivably it may not be necessary for wiper roller 5 and its absorbent covering 6 to be immersed at all in washing fluid 7 during or even after a washing operation particularly it is conceivably to render roller 5 selectively immersable into the washing fluid 7 contained in reservoir 8 generally the spur gears discussed heretofore such as components 1a 2a and 4a shown in fig1 a may in accordance with at least one preferred embodiment of the present invention be considered to be a type of gear that is essentially coaxial with respect to the corresponding cylinder or roller in question and non rotatable with respect to the corresponding cylinder or roller in question such spur gears may in accordance with at least one preferred embodiment of the present invention conceivably have teeth that run essentially axially with respect to the rotational axes of the corresponding cylinders and rollers or may conceivably have teeth that are skewed diagonal or helical with respect to the rotational axes of the corresponding cylinders one feature of the invention.