Method and apparatus for dividing a paper web
OwnerLars Ekströminventor
Life of this patent
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Abstract
A method of dividing a formed paper web into at least two partial-width webs during production of creped paper in a paper machine having a cylinder with an adhesive coating to which the web adheres. The web is divided in conjunction with the cylinder by one partial-width web being detached by scraping from the outer surface at a first web-detaching point while the other partial-width web, still adhered to the outer surface, accompanies this surface to a second web-detaching point situated downstream, to be detached by scraping from the outer surface, at least one partial-width web being creped off. The invention also relates to a apparatus and a paper machine including such a apparatus having doctor blades forming the web-detaching points.
Claims12
An apparatus for dividing a running fibrous web having a width into at least two partial-width portions along a dividing line therebetween extending longitudinally along a running direction of the web, comprising:
- a rotating cylinder having an outer surface adapted to have the web wrapped circumferentially thereabout and be adhered thereto such that rotation of the cylinder carries the web along the running direction;
- and
- at least first and second doctor blades engaging the outer surface of the cylinder for removing the web therefrom, the first doctor blade forming a first web-detaching point for removing one partial-width portion of the web from the cylinder and the second doctor blade being circumferentially spaced from the first doctor blade and forming a second web-detaching point for removing another partial-width portion of the web from the cylinder, whereby the two partial-width portions of the web are removed from the cylinder at different times such that the web is divided into the two partial-width portions along the dividing line therebetween.
A machine for forming creped paper, comprising:
- a rotating drying cylinder adapted to receive a wet formed paper web, the drying cylinder having an outer surface adapted to have the web wrapped circumferentially thereabout;
- a transfer roll in operative engagement with the drying cylinder for transferring the paper web onto the outer surface of the drying cylinder;
- an adhesive applicator constructed and arranged to apply adhesive to the outer surface of the drying cylinder for adhering the paper web thereto;
- and
- at least first and second doctor blades engaging the outer surface of the cylinder for removing the web therefrom, the first doctor blade forming a first web-detaching point for removing one partial-width portion of the web from the cylinder and the second doctor blade being circumferentially spaced from the first doctor blade and forming a second web-detaching point for removing another partial-width portion of the web from the cylinder, at least one of the doctor blades being operable to crepe the partial-width web removed thereby.
Dependencies are inferred from the claim text.