Abstract: A printer comprising a printing roller supporting a matrix strip; a pressure roller for pressing the web on to the matrix at a first portion of the printing roller; and an inking unit including an inking roller contacting the matrix at a second portion of the printing roller; the cylindrical outer surface of the inking roller presenting microincisions, and being partially immersed in water-based ink inside a tank; and surplus ink being removed from the surface of the inking roller by a doctor blade prior to transfer on to the matrix.

Abstract: A device for attenuating pressure pulses through fluids, in particular for continuous paper web producing machines, which comprises a tubular element having an inner body formed from a resilient material and an outer body formed from a rigid material, between which bodies an annular compensating chamber is provided which contains a pressurized fluid whose pressure can be varied automatically according to variations occurring in the pressure level of the fluid being conveyed, which result in said inner body of a resilient material undergoing deformation.A multilayered structure may be provided for the inner resilient body. The insertion of the attenuating device is accomplished in line with the feed conduit of the aqueous suspension to the intake tank.