Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1978-06-15
1979-12-25
Hoag, W. E.
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29460, 49501, 156 71, 156250, 264154, 264157, 264258, 264261, 264263, 264328, B23P 1700, B29D 302, B29D 900, B29G 300
Patent
active
041797906
ABSTRACT:
The invention relates to a process of manufacturing, in one and the same operation, a wall or a wall section having an opening therein, and a door or cover for the opening, the door or cover being larger than the free opening in the wall or wall section.
The two components are formed in a common tool, the components being placed in staggered parallel planes and interconnected by means of a connecting flange which is directed substantially transversely of these planes and extends between the surrounding edge portion of the wall opening and the surrounding edge portion of the door or cover. After forming, the two components are severed by cutting off of the connecting flange, the overlap of the wall or wall section and the door or cover being determined by the thickness of the connecting flange.
REFERENCES:
patent: 2549513 (1951-04-01), Nicolle
patent: 3896589 (1975-07-01), Mitchell
patent: 4080710 (1978-03-01), Hess
patent: 4126975 (1978-11-01), Williams
AB Trelleborgplast
Hoag W. E.
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