| 主权项 |
1. A nozzle assembly comprising:
a series of plurality of nozzles configured to be incorporated in an adhesive coater to form one or more adhesive lines extending in a machine direction on an upper surface of a fibrous web continuously running in the machine direction, the fibrous web having a length direction corresponding to the machine direction and a width direction corresponding to a cross direction orthogonal to the machine direction; first, second, third, and fourth working regions arranged in the recited order from upstream to downstream in the machine direction, and on a side facing the upper surface of the fibrous web; and a first plate, a first shim, a second shim, a third shim and a second plate arranged separatably in close contact with one another in the recited order from upstream to downstream in the machine direction, wherein the first working region is configured to be pressed against the fibrous web fully in the width direction, the second working region is configured to discharge adhesives and includes
a plurality of first partitioning regions arranged intermittently in the cross direction, anda plurality of adhesive outlets each defined between a pair of adjacent first partitioning regions among the plurality of first partitioning regions,wherein the adhesive outlets are located corresponding to the adhesive lines to be formed in the machine direction, and respective end surfaces of the first partitioning regions are flush with the first working region, the third working region includes
a plurality of second partitioning regions arranged intermittently in the cross direction and downstream of the first partitioning regions, andstepped regions each arranged between a pair of adjacent second partitioning regions among the plurality of second partitioning regions so that the second partitioning regions and the stepped regions are alternately arranged in the cross direction,whereinrespective end surfaces of said second partitioning regions are configured to face the upper surface of the fibrous web and are flush with the first working region as well as with the end surfaces of the first partitioning regions, anda surface of the stepped regions configured to face the upper surface of the fibrous web is spaced upward at least 0.1 mm from the flush end surfaces of the first and second partitioning regions, and the fourth working region is configured to eject pressurized air and is located downstream of the second partitioning regions and the stepped regions, and the fourth working region has pressurized air outlets from which the pressurized air is to be ejected toward the upper surface of the fibrous web, the first plate defines the first working region, the first shim defines the first partitioning regions and adhesive flow channels for the adhesives, the first shim is formed of a metal plate, and the first shim cooperates with the first plate and the second shim both held in close contact with the first shim to define the adhesive outlets at respective ends of the adhesive flow channels, the third shim defines pressurized air flow channels for the pressurized air, the third shim is formed of a metal plate, and the third shim cooperates with the second shim and the second plate both held in close contact with the third shim to define the pressurized air outlets at respective ends of the pressurized air flow channels, the first plate further defines an adhesive guiding channel adapted to guide the adhesives from outside of the nozzle assembly into the adhesive flow channels, and the second plate defines a pressurized air guiding channel adapted to guide the pressurized air from outside of the nozzle assembly into the pressurized air flow channels. |
