Sleeve roll belt
AssigneeValmet Technologies Oy
InventorTuuli Silomaa
Life of this patent
Estimating the term…
Abstract
A sleeve roll belt (10) has an inner surface (11) and an outer surface (12). The belt has a body (15) and a reinforcing structure (30). The reinforcing structure (30) has first yarns (31) arranged to a first direction (D1) of the belt, and second yarns (32) arranged to a second direction (D2) of the belt. The reinforcing structure (30) also has auxiliary yarns (31b, 31c) arranged parallel or substantially parallel to the first direction (D1) of the belt, wherein the auxiliary yarns are arranged to a depth of greater than a depth of the first yarns, measured from the outer surface (12) of the body (15) to an outer surface (31-o, 31b-o) of each yarn (31, 31b, 31c) in the depth direction of the belt, and a diameter of the auxiliary yarns is at least 20% smaller than a diameter of the first yarns.
Claims20
A sleeve roll belt for a sleeve roll in a forming section of a fiber web machine, the sleeve roll belt comprising:
- a body forming an endless loop which is arranged to rotate in a machine direction about an axis which extends in a cross-machine direction and having an inner belt surface arranged to face a sleeve roll, an outer belt surface arranged to face a fiber web, and the body defining a thickness between the inner belt surface and the outer belt surface, and a depth from the outer belt surface to the inner belt surface;
- a reinforcing structure within the body of the sleeve roll belt, the reinforcing structure comprising:
- first yarns having a first diameter, a first outermost surface and a first innermost surface, wherein the first yarns are arranged substantially in the machine direction;
- auxiliary yarns having a second diameter, a second outer surface and a second inner surface, wherein the auxiliary yarns are arranged substantially parallel to the machine direction;
- second yarns arranged substantially in the cross-machine direction, wherein the second yarns are spaced below the first yarns and the auxiliary yarns;
- wherein the first yarns are arranged at a first depth measured from the outer belt surface to the first outer surface of said first yarns;
- wherein the auxiliary yarns are arranged to a second depth measured from the outer belt surface to the second outer surface;
- and
- wherein the second diameter of the auxiliary yarns is at least 20% smaller than the first diameter of the first yarns.
A sleeve roll apparatus for a forming section of a fiber web machine comprising:
- a sleeve roll having a protruding curve element thereon;
- a sleeve roll belt mounted to the sleeve roll to extend over the curve element, the sleeve roll belt comprising:
- a body forming an endless loop which is arranged to rotate in a machine direction about an axis which extends in a cross-machine direction and having an inner belt surface arranged to face a sleeve roll, an outer belt surface arranged to face a fiber web, and the body defining a thickness between the inner belt surface and the outer belt surface, and a depth from the outer belt surface to the inner belt surface;
- a reinforcing structure within the body of the sleeve roll belt which comprises:
- first yarns having a first diameter, a first outermost surface, and a first innermost surface, and wherein the first yarns are arranged substantially in the machine direction;
- auxiliary yarns having a second diameter, a second outer surface, and a second inner surface, wherein the auxiliary yarns are arranged substantially parallel to the machine direction;
- second yarns arranged substantially in the cross-machine direction and spaced from the belt outer surface to be below the first yarns and the auxiliary yarns;
- wherein the first yarns are arranged beneath the belt outer surface, wherein the innermost surfaces of the first yarns are spaced a first distance below the belt outer surface;
- wherein the auxiliary yarns are arranged to a second depth measured from the outer belt surface to the second outer surface, and wherein the second depth is not greater than the first distance;
- and
- wherein the second diameter of the auxiliary yarns is at least 20% smaller than the first diameter of the first yarns.
Dependencies are inferred from the claim text.