Method and apparatus for manufacturing a product comprising a substrate on which an adhesive with delayed action and a protection strip are located

摘要

The process relates to the production of a product consisting of a substrate to which an adhesive with long-term effect and a protective band are attached to permit use of the adhesive to be deferred. The process is characterized by the use of a substrate whose surface to which the adhesive is attached may present irregularities. The adhesive is heated to a temperature at which is becomes paste-like and almost liquid, 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. This results in the adhesive being deposited on the substrate as a strand that is preferably continuous. The temperature of the adhesive is then lowered in order to increase its viscosity until it becomes paste-like to the point of turning solid. Pressure is thereafter applied to the paste, like adhesive, preferably with the imposition of a protective strip, in order to cause spreading of and to cover the strand along its full length. Finally, the resultant product may be cut to produce a substrate having an adhesive strip thereon and a detachable protection band covering the adhesive strip.