Rotary printing machine with liquid supply apparatus comprising an endless band

Rotary printing machine having at least one plate cylinder and a liquid supply apparatus (2-16) including an inker (2-12) and a damper (13-16), the liquid supply apparatus including liquid supply rollers and an endless band guided over two deflection roller (19, 20), the deflection rollers being held between two support plates which have guide elements cooperating with counterpart guide elments attached to the machine,

• wherein, in accordance with the invention,
• the band (18) has a surface accepting ink and damping fluid and extends over the width of the fluid supply rollers;
• support plate guide means (23) associated with said support plates (21) and plural sets of counterpart guide elements (26,27 and 37,38) associated with the machine cooperate such that either set of counterpart guide elements can selectively be engaged by said support plate guide means for select engagement of said endless band with one or two liquid supply rollers
• and guide elements (24, 25) formed with first engagement surfaces for engaging the counterpart guide elements (26, 27, 37, 38) formed with second engagement surfaces, said first and second engagement surfaces including guide portions and curved portions to permit displacement of the support plates with respect to the machine and hence of the band (18), towards and away from the fluid supply rollers at right angles to the axes of two liquid supply rollers (e.g. 5, 13) and pivoting movement about an axis parallel to the axis of at least one of the deflection rollers (19, 20);
• and
• positioning means (28, 29, 30) supported on the machine are provided for fixing the support plates (21) on the counterpart guide elements (26, 27) in at least two different operating positions of the endless band (18), in which positions the band is selectively in contact with one or two rollers (5, 13, 9) of the liquid supply apparatus.