FIELD: devices for molding containers with strengthened edges. SUBSTANCE: proposed device has spool for delivery of flexible film, molding ferrule located before first pip for winding the film, thermal welding unit; first pipe has constriction for insertion into second pipe and one insert member which acts perpendicularly relative to surface of film for forming at least one fin directed inside body. One fin is formed by odd number overlapping thermally welded sections of film; odd number is equal to at least three; second pipe has smooth outer surface free from radial projections; body slides. EFFECT: reduced volume required for storage of containers due to reduced thickness of edges. 11 cl, 10 dwg
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