Form parts, partic. valve caps or plastic or metal

摘要

The connecting devices comprise hollow projections (2) formed on the one form part (1,2) and cavities (3,4) on the other form part as counter pieces for the projections. The projections are of the press button type, or have a pot shape with open or closed face sides. The cavities are open on the base side. The projections have a widening cross-section to the face side and the cavities have a corresp. narrowing cross-section to their accommodation side for the projections. The projections and the cavities are formed on matching flanges (6,7) of the form parts (5,1).