Wire section in a paper machine

Claim 1

In a paper machine, a wire section comprising: a lower wire having an initial single-wire run in which dewatering of a web takes place; at least one upper wire unit including an upper wire loop, said at least one upper wire unit following said initial single-wire run and defining a twin-wire dewatering zone together with an adjacent run of said lower wire, said twin-wire dewatering zone being mainly located below the plane defined by said initial single-wire run of said lower wire, and wherein dewatering of the web takes place in at least a part of said twin-wire dewatering zone through said lower wire as well as through said upper wire; said twin-wire dewatering zone being partly defined by a curved, solid-cover forming shoe disposed within the wire loop of said upper wire unit; said forming shoe being preceded by a curved dewatering zone defined by a curved member and wherein dewatering of the web takes place mainly through said upper wire, said curved member being constituted by a solid-shell forming roll having a smooth surface, said forming roll preceding said at least one upper wire unit to deflect the run of at least said lower wire over a certain angle; and wherein said at least one upper wire unit includes means situated mainly above said forming shoe for conducting water dewatered from the web through said upper wire to at least one side of the paper machine substantially without the use of suction energy, said watering conducting means comprising a chute assembly situated above said forming shoe within said upper wire loop, said chute assembly including curved guide vanes situated above said forming shoe, said vanes dividing the water dewatered from the web through said upper wire into two transverse directions.