US 5,203,920 AGranted

Device for applying a coating composition to traveling webs of material on two web paths

AssigneeJ.M. Voith GmbH

InventorAnton Plomer

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Abstract

A coating section for coating a traveling web of material, such as paper, wherein the web to be coated travels along a selected one of two different web paths. There is a lower counter roll and an upper press roll which define a nip between them and the distance apart of the two rolls is adjustable. A respective applicator for coating composition is on each of the first and second sides of the lower roll and on the third side of the upper roll, and the third side is the same side of the coating section as the first side of the lower roll. First web guide rollers guide the web from below, past the counter roll and the first applicator and not through the nip. Second guide rollers guide the web through the nip.

Claims13

Dependent claims

A device for applying coating composition to a web which passes through the device on a selected one of two different web paths, the device comprising:

a lower rotatable counter roll having a first periphery for support of a web thereon and being rotatable between spaced apart first and second sides;
a first applicator at the first side of the counter roll, the first applicator including first means for applying a first coating composition directly onto a first web;
first web guide means for guiding the first web along the first one of the web paths around the counter roll past the first applicator;
a second applicator at the second side of the counter roll, the second applicator including second means for applying a second coating composition to the counter roll at the second side;
a rotatable upper press roll located above the counter roll at a distance therefrom as to form a nip with the counter roll at the top of the counter roll;
the press roll having a respective second periphery and being rotatable between respective spaced apart third and fourth sides, the nip being formed between the first and second sides of the counter roll and the third and fourth sides of the press roll;
a third applicator at the third side of the press roll, the third applicator including third means for applying a third coating composition to the press roll at the third side;
second web guide means for guiding a second web along the second web path through the nip between the counter roll and the press roll and not past the first applicator;
the second web guide means being so positioned and the counter roll and the press roll being so rotatable that the second path of the second web is through the nip from the first to the second sides of the counter roll;
first web guide means including first guide rollers being positioned for directing the first web up to the counter roll from below such that the first web approaches the counter roll from below and from the second side of the counter roll;
and
respective first and second means for mounting the counter roll and the press roll for rotation, and at least one of the mounting means being movable for adjusting the width of the nip between the rolls.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A device for applying coating composition to a web which passes through the device on a selected one of two different web paths, the device comprising:

a lower rotatable counter roll having a first periphery for support of a web thereon and being rotatable between spaced apart first and second sides;
a first applicator at the first side of the counter roll, the first applicator including first means for applying a first coating composition directly onto a first web;
first web guide means for guiding the first web along the first one of the web paths around the counter roll past the first applicator;
a second applicator at the second side of the counter roll, the second applicator including second means for applying a second coating composition to the counter roll at the second side;
a rotatable upper press roll located above the counter roll at a distance therefrom as to form a nip with the counter roll at the top of the counter roll;
the press roll having a respective second periphery and being rotatable between respective spaced apart third and fourth sides, the nip being formed between the first and second sides of the counter roll and the third and fourth sides of the press roll;
a third applicator at the third side of the press roll, the third applicator including third means for applying a third coating composition to the press roll at the third side;
second web guide means for guiding a second web along the second web path through the nip between the counter roll and the press roll and not past the first applicator;
the second web guide means being so positioned and the counter roll and the press roll being so rotatable that the second path of the second web is through the nip from the first to the second sides of the counter roll;
first web guide means including first guide rollers being positioned for directing the first web up to the counter roll from below such that the first web approaches the counter roll from below and from the second side of the counter roll;
and
respective first and second means for mounting the counter roll and the press roll for rotation, and at least one of the mounting means being movable for adjusting the width of the nip between the rolls.

9 more elements