Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1999-01-25
2000-09-19
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264296, 425396, 206508, 220781, B29C 4326, B29C 4350
Patent
active
061207217
ABSTRACT:
A process for the production of pile-up lids, each of which comprises an upper wall (1) and an element (2) arranged around the perimeter of said upper wall (1) and which forms a lip (3) protruding above said upper wall (1), and skirt (4) extending below said upper wall (1); the process includes the steps of bringing together in a synchronous manner external sector elements (9) and internal sector elements (10) in radially opposite directions so that, owing to the forced approach of the contact surfaces of the external and internal sector elements (9, 10) with said upper lip (3) of said lid interposed between them, a reeding pressure-molding is obtained on both the inner and the outer surfaces of said upper lip (3), giving said lip (3) an outline to allow piling up on other similar lids.
REFERENCES:
patent: 3200442 (1965-08-01), Haller
patent: 3403649 (1968-10-01), Geiger et al.
patent: 4228121 (1980-10-01), Meadors
patent: 4278585 (1981-07-01), Arndt et al.
patent: 5253995 (1993-10-01), Romstad et al.
Poe Michael I.
Seda S.p.A.
Silbaugh Jan H.
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