BESTRYKNINGSFOERFARANDE OCH BESTRYKNINGSANORDNING FOER BESTRYKNING AV LOEPANDE AEMNESBANOR AV PAPPER ELLER KARTONG

The appts. to coat a moving paper or cardboard web has a roller spreader as the first coating stage, fitted with fine peripheral grooves packed closely together to give a low volume layer as a dose as the mantle surface of the first roller (1) guiding the web. The applied mass is compressed in the gap between the first roller (1) and a counter roller (2) so that a thin layer of the coating mass remains, particularly the solid pigment portion. The solid content of the coating mass for the first applied coating is a max. of 70%. The pref. solid content of the coating mass in the first stage is 50-60%, and the coating is applied at a rate of 6-40 ml/m2, especially 12-22 ml/m2. A further roller blade, with peripheral grooves, applies a second coating where the web passes round a second guide roller (3) using a coating mass with a solid content of max. 70% and at least an absolute 10% higher than in the first coating mass as a pref. 60-70%. Designed for coating cardboard web, a doctor blade can be used instead of a roller applicator, or a suitable bar.