Sheet forming device and method for sheet forming
OwnerGunter Halmschlager, Erich Brunnauer +2inventors
InventorsGunter Halmschlager, Erich Brunnauer, Wilhelm Gansberger, Heinrich Lang
Life of this patent
Estimating the term…
Abstract
Plies that are formed by respective formers are couched together in a sheet forming device, specifically a machine for the production of a multi-ply fiber web, particularly a paper or cardboard web, or a packaging paper web. At least one of the formers for forming a multi-ply web includes a multi-layer headbox, to which at least two different stocks, or stock partial streams of different composition for different plies are furnished.
Claims21
A sheet forming device for the production of a multi-ply fiber web, specifically one of paper, cardboard and packaging paper in which at least two plies, formed by corresponding formers, are couched together comprising:
- a plurality of formers, at least one of said plurality of formers comprising a multi-layer headbox for receiving at least two of stocks and stock partial streams of different compositions for different plies.
The device of 1, further comprising:
- a press section;
- a dryer section;
- and
- at least one of a coating device, an applicator device and a rewinder.
A method of forming a sheet for the production of a multi-ply fiber web, specifically one of paper, cardboard and packaging paper in which at least two plies, formed by corresponding formers, are couched together comprising the steps of:
- providing a plurality of formers, at least one of said plurality of formers comprising a multi-layer headbox;
- and
- furnishing at least two of stocks and stock partial streams of different compositions for different plies.
The method of 11, further comprising the step of providing a press section, a dryer section and at least one of a coating device, an applicator device and a rewinder.
A fiber stock web, formed by a method comprising the steps of:
- forming a liner layer of at least one of long fiber fraction and fines poor fraction on a base wire,
- forming a backing layer of at least one of long fiber/short fiber fraction and fines poor/fines rich fraction;
- and
- forming a center layer of at least one of short fiber fraction and fines rich fraction, said center layer located between said liner layer and said backing layer.
Dependencies are inferred from the claim text.