Andritz Kusters Gmbh

Eduard Davydenko

Bernhard Brendel

Peter Svenka

Andreas Pesch

Robert Meitner

Thomas Hoffmann

Bernd Jansen

Device for applying a treatment substance (), in particular starch, on at least one side of a running product web (), in particular a paper or board web, by means of a least one curtain coater () having a discharge nozzle () and at least one press nip (N) following the curtain coater () for forming a hydraulic pressure when the product web () passes through a press nip (N) which is formed by one of two rotating press rolls and which causes the treatment substance () to penetrate into the product web (), wherein the at least one press nip (N) is equipped with at least one heated applicator roll () as a press roll to increase the penetration of the treatment substance () into the product web (), and at least one of the two press rolls () is designed with a fixed or adjustable crown () for the adjustment of a line load in a range of 20 to 200 kN/m.

Device for applying a treatment substance

Calender () for calendering a paper or board web (), having at least one nip (), which is formed between a heatable roll () and a mating element (), a device () for producing a predetermined pressure in the nip (), and a web treatment device () arranged upstream of the nip () and having two contact surfaces () forming a treatment nip (), one of which is a circulating contact surface () which is formed by a belt () circulating on guide rolls (), the other contact surface () is formed by the circulating surface of the heatable roll (), and the treatment nip () extends along an angle () of the wrap of the heatable roll (), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt () uses a resilient surface to press the paper or board web () onto the heatable roll (), and the guide rolls () control sectional forces of the circulating belt () in the treatment nip ().

Calender for treating a product web

A calender () for calendering a paper web (), in particular made from paper suitable for gravure printing, having at least one roll stack which in each case has an upper and a lower end roll () and intermediate rolls (), one of the two end rolls () delimits a first working nip () of the roll stack depending on the guidance of the paper web (), and the rolls () are hard rolls () and soft rolls () in order to form loadable working nips in the form of soft nips, the end roll () which delimits the first working nip () being a hard, heated roll, the diameter of which is greater than that of a hard, heated intermediate roll () and the outer wall () of which forms one of two contact faces () of a web treatment nip () which is arranged upstream of the first working nip (), and the other contact face () being formed by a belt () which circulates on guide rolls ().

Growing community of inventors

Grefrath-Oedt, Germany

Eduard Davydenko