Arrangement and method for tail-threading a fibrous web

摘要

The primary object of the invention is an arrangement in the fibrous-web machine for tail-threading of a fibrous web, a tail-threading apparatus and a method for tail-threading. The arrangement comprises a tail-threading apparatus which is arranged to receive a tail separated from the fibrous web and to guide it further to the subsequent section of the fibrous-web machine in the longitudinal direction of the fibrous-web machine, at least one blower (102, 104) which is provided with a flow-preventing plate (103, 105) and arranged to guide the tail towards said tail-threading apparatus for feeding the tail to the tail-threading apparatus, whereby said at least one blower (102, 104) with its flow-preventing plate (103, 105) is arranged to divert the travel direction of tail on the longitudinal vertical plane and the cross-directional vertical plane of the fibrous-web machine, and said tail-threading apparatus comprises a rope nip receiving the tail the tail-threading ropes of which are supported by a rope pulley (108) which is arranged to rotate on a plane in the direction of the longitudinal axis of the fibrous-web machine and oblique in relation to the vertical direction and which is arranged to receive the diverted tail in the diverted travel direction. The invention enables the implementation of a tail-threading process fitting into a smaller space.

主权项

1. An arrangement in a fibrous-web machine for the tail-threading of a fibrous web, which arrangement comprises
a tail-threading apparatus which is arranged to receive a tail separated from the fibrous web and to guide the tail further to the subsequent sections of the fibrous-web machine in the longitudinal direction of the fibrous-web machine, at least one blower which is provided with a flow-preventing plate and arranged to guide the tail towards said tail-threading apparatus to feed the tail to the tail-threading apparatus in a diverted travel direction,whereby
said tail-threading apparatus comprises a rope nip receiving the tail the tail-threading ropes of which are supported by a rope pulley which is arranged to rotate on a plane in the direction of the longitudinal axis of the fibrous-web machine and oblique in relation to the vertical direction and which is arranged to receive the diverted tail in said diverted travel direction, said at least one blower with its flow-preventing plate is arranged to divert the travel direction of the tail simultaneously on the longitudinal vertical plane and the cross-directional vertical plane of the fibrous-web machine substantially to the cross-directional vertical plane of the machine or at the most at an angle of 45 degrees in relation to said vertical plane, forming said diverted travel direction.