Device and method for transferring a strip of a web
AssigneeAndritz Inc.
InventorsAndré Theussl, Wolfgang Klamminger, Reinhard Diemat
Life of this patent
Estimating the term…
Abstract
The invention relates to a device and a method for transferring the tail of a web from a first clothing to a second clothing. It is characterised in that the tail is transferred in a first, short open draw from the first clothing to the second clothing. This enables automatic web transfer requiring significantly less space and with equipment of low complexity.
Claims18
A method for transferring a tail (1) of a pulp web (2) from a first clothing (14) to a second clothing (13) in a first open draw (9) in a machine (10) for production of the pulp web, comprising steps of
- guiding the tail cut from the pulp web through at least one press nip,
- after the at least one press nip, transferring the tail of the pulp web in the first open draw to the second clothing,
- moving the tail (1) onwards with the second clothing (13) with the tail (1) being guided on the second clothing (13) to a second area (19),
- carrying the tail (1) in the second area (19) between the second clothing (13) and a third clothing (15),
- wherein the tail (1) and a remaining section of the pulp web (2) are carried together on the first clothing (14) through the at least one press nip (5) between a suction press roll (4) and at least one other roll (6) to mechanically dewater the tail and the remaining pulp web in the at least one press nip (5),
- carrying the tail (1) onwards on the first clothing (14) while the remaining pulp web (2) follows a clothing of the other roll (6) to a broke area, wherein
- the second clothing (13) is a felt, and
- the third clothing (15) is a felt or impermeable belt.
A machine (1) for production of a pulp web with a device for transferring a tail (1) of the pulp web (2), comprising:
- a first clothing (14) and a second clothing (13),
- the first clothing carrying the tail cut from the pulp web through at least one press nip formed between a suction press roll and at least one other roll,
- an open draw (9) for transferring the tail (1) from the first clothing (14) to the second clothing (13),
- a roll (11) for guiding the second clothing (13) after the open draw (9), and
- a jet from a pneumatic nozzle (8) that can be directed onto the first clothing (14) after the open draw, the jet being disposed in a cross-machine area of the first clothing (14),
- wherein
- the tail (1) is carried on the first clothing (14) before the open draw (9),
- the tail (1) and the remaining pulp web (2) can be carried together on the first clothing (14) through the at least one press nip (5),
- the tail (1) can be carried onwards on the first clothing (14) and the remaining pulp web (2) can be carried onwards on a clothing of the other roll (6) to a broke area.
A machine for production of a pulp web having a basis weight of more than 450 g/m2 in a manner that allows automatic transfer of a tail of the pulp web, the machine comprising:
- at least one press nip formed between a suction press roll and at least one other roll and being arranged to dewater the tail cut from the pulp web,
- a first clothing carrying the tail cut from the pulp web having a basis weight of more than 450 g/m2 through the at least one press nip,
- an open draw arranged after the at least one press nip and for transferring the cut tail from the first clothing to a second clothing,
- said open draw being defined by a gap between the first clothing and the second clothing whereby the first clothing and the second clothing do not touch one another and the pulp web is not supported and is guided freely,
- a roll for guiding the second clothing after the open draw, and
- a pneumatic nozzle directing a jet onto the first clothing after the open draw, the jet being disposed in a cross-machine area of the first clothing.
Dependencies are inferred from the claim text.