Abstract: Blow molding and thermoforming processes in which a mold system having low thermal inertia mold-halves provided with heating and cooling systems is utilized for producing plastic articles coated with surface-upgrading films of high melting polymers or polymers exhibiting a high scratch resistance to improve mechanical characteristics of the molded article. The films may be positioned, before the mold is closed, close to the low thermal inertia mold-halves. Rapid heating and rapid cooling of the mold-halves in contact with the surface-upgraded films permit strength adhesion of the upgrading material to the surface of the molded article.

Abstract: A self-supporting roof plate for motor vehicles and the like is disclosed, characterized in that said roof plate consists essentially of a composite structure comprising a plate of rigid thermoplastic material bonded to a layer of foamed plastic material having a thermo-acoustical insulating function, and a layer of an aesthetically pleasing plastic material, said multi-layer structure being so shaped as to include on opposite sides two hook-like or S-shaped arcuate strips forming elastically yielding strips, adapted for the assemblage of the structure against the roof body of the car, by snap-fitting said arcuate strips into grooves prearranged between the roof ceiling and the body sides of the vehicle. The rigid plate may be a box-type or similar structure. The arcuate strips may be obtained by the thermo-forming of the composite structure.

Abstract: A dish-washing machine composed of thermoplastic material comprising an inner enclosure fitting within but spaced from an outer enclosure, and a plurality of functional units. The functional units include a dish-carrying drawer unit having a rotor mounted within the inner enclosure, an electrical control unit mounted in the space between the upper end of the inner enclosure and the outer enclosure, and an hydraulic unit located in the space between the lower end of the inner enclosure and the outer enclosure. A vapor condenser is located within the space between the inner and outer enclosures for condensing steam passing through holes in the inner enclosure.