Method and apparatus for manufacturing a fibrous material product on which a deferred-action adhesive and a removable protective strip are disposed

Abstract

The described process involves the production of a product comprising a fibrous substrate to which an adhesive with long-term effect and a removable protective strip are applied in order to permit use of the adhesive to be deferred. The process is particularly useful with substrates whose surface to which the adhesive is applied contains irregularities. The adhesive is heated to a temperature at which it becomes paste-like and readily flowable and is brought to an opening situated above a plane surface on which the substrate has been placed. The adhesive is then caused to flow simultaneously with a relative movement between the substrate and the opening to be deposited on the substrate as a strand that is preferably continuous. The temperature of the adhesive on the substrate is then lowered in order to increase its viscosity until it becomes paste-like just prior to the point of turning solid. Pressure is thereafter applied to the adhesive, preferably with the imposition of a protective strip, in order to cause spreading of the strand and to cover it along its full length. Finally, the resultant product may be cut to produce a substrate of desired shape having an adhesive band thereon and a detachable protection strip covering the adhesive band.

Dependencies are inferred from the claim text.