Renewable flexible band doctoring device

Coating device for one- or two-sided coating of a travelling web, the coating device comprising:

• at least one counter-means disposed on one side of the web;
• at least one first metering means disposed on an opposite side of the web, the metering means including a transfer roller and a metering member, the transfer roller and the metering member extending across the web over a full width of the web, the metering member being made of a flexible, elongate element, a length of said element substantially exceeding the width of the web, said element being arranged to be fed across the web so that new sections of said element contact with the web to ensure correct metering of a supplied coating agent, said element having a contact surface, the contact surface being provided with one or more grooves for being supplied with coating agent for metered application of coating agent onto a surface of the transfer roller at a point on the transfer roller upstream of a point of contact of the transfer roller with the web.