Apparatus and method to maintain positive separation of reactive bands

The method of packaging first and second kneadable plastic masses that react when mixed, that includes

• (a) providing the masses in lengthwise elongated strip form and traveling the masses lengthwise in parallel relation but with a predetermined gap therebetween,
• (b) providing an elongated first plastic film that defines a barrier and traveling said film in the direction of travel of the masses, said film being thermoplastic and including the step of preliminarily heating and forming the film to define said barrier to have V-shape, with side sections, in cross section,
• (c) thereafter urging the traveling formed film toward the traveling masses to contact same and to locate the barrier in said gap, said urging including providing an annular fin on a roller and resiliently urging the fin into the groove defined by said V-shape, and
• (d) providing and traveling a second elongated plastic film in under supporting relation with said masses, the first plastic film being urged downwardly toward the masses so that the film side sections are urged against the masses at the same time that the barrier is urged downwardly in the gap to contact the second film.