SETT OCH ANORDNING FOR TILLVERKNING AV EN SAMMANSATT BANA

摘要

An apparatus for manufacturing a sandwich web comprises first and second rotatable applicator rollers which are mounted so as to form an adjustable first roller nip therebetween adjacent adhesive applicator means which applies a film of adhesive to each of the applicator rollers for coating on respective sides of a substrate web. The apparatus includes a pivotal arm which contains a first laminating roller which forms a nip with the first applicator roller so that a laminating web may be fed thereover to engage the adhesive on one side of the substrate. In addition, a second laminating roller is contained by the pivotal arm and it may be brought into association with the first laminating roller to form a third roller nip so that a second liner may be laminated to the adhesive on the opposite face of the substrate. In accordance with the method of the invention the substrate is fed between the first roller nip and is coated on each side with an adhesive to a predetermined level which is regulated by the rotational speeds of the applicator rollers and it is thereafter directed over a portion of the surface of the first laminating roller so that the laminating web which is fed thereon is bonded to the adhesive on the one side of the substrate. The second liner is then fed on the opposite face with a second laminating roller which is arranged in association with the first laminating roller to define a third nip therewith. The rotational speeds of the laminating rollers in their adjustable positions relative to each other and to the applicator rollers permit selection of the film amount of adhesive and the bonding which is effected between the liners and the substrate.