Abstract

This device for preparing a liquid mixture (18) that is to be applied to a printing material (24) comprises a first reservoir (2) containing a first ingredient (1) of the liquid mixture (18), a supply source (32) for a second ingredient (16) of the liquid mixture, a mixing tank (12, 14) for receiving the at least first and second ingredients (1, 16) and for mixing the ingredients (1, 16) to obtain the liquid mixture, and means (6, 30) to convey the first ingredient (1) and the second ingredient (16) from the first reservoir and the supply source to the mixing tank. The device is characterised in that the first ingredient (1) comprises less than 60, preferably less than 50, and most preferably less than 25 weight % of water, in particular is an essentially waterless ingredient.

IPC Classes  ?

• B41F 23/04 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by heat drying, by cooling, by applying powders

Abstract

This device for applying a moistening liquid to a paper web comprises a liquid applicator roller (44, 46) for applying the moistening liquid (38) on the paper web (18). The liquid applicator roller comprises an application surface (60), and is characterized in that the application surface (60) is formed of a material capable of creating a corona effect on the paper web by discharge of static electricity between the surface and the paper web (18). Application to paper web dryers of rotary offset presses.

IPC Classes  ?

• B41F 23/02 - Devices for treating the surfaces of sheets, webs or other articles in connection with printing by dampening