Rod-bed assembly

A rod-bed assembly for coating or sizing a fiber web, the assembly comprising:

• an integral unitary holder formed of a composite material extending in a longitudinal direction and having a front side and portions forming an insert receiving groove on the front side, the holder being made of composite material with a fiber orientation and fiber structure such that the stiffness modulus of the holder in its longitudinal direction is low, the low longitudinal modulus of the holder making the holder flexible in a cross-direction of the fiber web running direction and providing for the possibility of cross-directional profiling of a sizing or coating medium amount while still providing rigidity in a cross-sectional direction of the holder, thus providing for secure holding of an insert;
• wherein the holder extends in a longitudinal direction and wherein the holder has a back side, and a back side surface opposite the front side, the back side defining a width in the longitudinal direction, and having a plurality of notches, each notch defining a notch width, which notches divide the back side surface into a plurality of surfaces which define profiling loading points;
• wherein the plurality of notches extend into the holder toward the groove such that the holder has a longitudinal modulus of 8-40 Gpa;
• wherein a sum of the width of each of the plurality of notches comprise 10-30% of the backside width;
• and
• wherein the insert is removably and insertably supported in the groove of the holder, the insert having a front side arranged to face a fiber web, and portions forming a recess which is arranged to support a rod for rotation in the recess on the front side of the insert.

A rod-bed assembly for coating or sizing a fiber web, the assembly comprising:

• a plurality of holder units, each holder unit having a length of at least 0.5 meters;
• each of the plurality of holder units forming an integral unitary holder unit formed of a composite material extending in a longitudinal direction and having a unit front side and portions forming an insert receiving groove on the front side, the holder units being made of composite material with a fiber orientation and fiber structure such that the stiffness modulus of each holder unit in the longitudinal direction is low, the low longitudinal modulus of each holder unit making the integral unitary holder unit flexible in a cross-direction of the fiber web running direction and providing for the possibility of cross-directional profiling of a sizing or coating medium amount while still providing rigidity in a cross-sectional direction of the holder unit, thus providing for secure holding of an insert;
• wherein the holder units are arranged end to end in a cross-machine direction to form part of the rod-bed assembly;
• wherein each holder unit has a back side, and a back side surface opposite the front side, the back side defining a width in the longitudinal direction, and having a plurality of notches, each notch defining a notch width, which notches divide the back side surface into a plurality of surfaces which define profiling loading points;
• wherein the plurality of notches extend into the holder unit toward the groove such that the holder unit has a longitudinal modulus of 8-40 Gpa;
• wherein a sum of the width of each of the plurality of notches of each holder unit comprises 10-30% of the backside width of each holder unit;
• wherein the insert is removably and insertably supported in the insert receiving groove on the front sides of the holder units, the insert having a front side arranged to face a fiber web, and portions of the front side forming a recess in which the insert lines the insert receiving groove;
• and
• a rod rotatably mounted for rotation in the recess on the front side of the insert.