Miter joint for hollow plastic frame members
AssigneesColor-Plast S.p.A., Generale Ultrasuoni S.p.A.
InventorsGiacomo Crotti, Erminio Diolaiti
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Abstract
An angular connection for a frame or counterframe composed of hollow sections of plastic material includes at least one plastic angular element inserted with its two legs fitting firmly in the hollow sections at the point at which they converge. The walls of the sections are welded to the legs of the insert by ultrasonic spot welds. A second plastic insert may be provided for connecting together edges of the sections, the first plastic insert being arranged to connect the main bodies of the sections together. Both inserts are connected to the hollow sections by ultrasonic spot welds. A method of making an angular connection for a frame and counterframe includes the step of welding hollow sections to at least one plastic angular element using ultrasonic welding techniques.
Claims6
An angular connection for a frame or counterframe composed of converging hollow sections of plastic material, the connection comprising at least one plastic angular element having legs, said legs being inserted and fitting firmly in respective ones of said converging sections. walls of said sections being welded to said legs by ultrasonic spot welds, wherein said plastic angular element connecting said bodies of said sections is in the shape of a hollow "L" having internal partitions connecting short walls with the long walls of said "L", and including at least one ultrasonic spot weld applied to the outside perimetric surface of said bodies of said sections in correspondence with said partitions.
Dependencies are inferred from the claim text.