Multi-layer radiator of plastic material and process for its manufacture

A multi-layer radiator of plastic material consisting essentially of planar elements formed of vertical substantially parallel water pipes interconnected by webs of plastic material substantially co-extensive with said pipes and a pair of spaced horizontal headers to which the ends of said pipes are connected, said elements being connected to one another by straps at points spaced from said headers to form multi-layer units, the units being firmly joined to one another endwise.

A process for the manufacture of a multi-layer radiator which comprises forming a plurality of elements each comprising a pair of spaced collecting channels connected to the ends of a series of parallel water pipes, said pipes being laterally connected by webs of plastic substantially co-extensive therewith, assembling said elements in parallel into units by securing the outermost pipes in one element to corresponding outermost pipes of another element by straps at points spaced from said collecting channels and assembling said units into said multi-layer radiator by welding the end surfaces of adjacent units to one another, the straps being secured to the pipes by welding at the same time that the surfaces of adjacent units are welded together.

A process for making a multi-layer radiator of plastic material wherein each layer consists essentially of individual planar elements formed of vertical substantially parallel water pipes and a pair of spaced horizontal headers to which the ends of said pipes are connected, which comprises connecting said individual elements to one another by straps at points spaced from said headers to form multi-layer units and welding the units thus obtained to one another.