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US 4,057,022 AGranted
Vessel having a pattern-molded bottom, a manufacturing process therefor
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsKenji Koshino, Masayasu Itoh
Life of this patent
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Abstract
A vessel having a pattern-molded bottom formed by a process of molding a pattern on the part of a flat blank which is to become the bottom of a vessel, holding the rest of the blank in such a manner that the molded pattern may not be affected by subsequent working of the part of the blank other than the pattern-molded part, and then forming the side wall of the vessel by drawing the rest of the blank.
Claims6
A process of manufacturing a vessel with a pattern-molded bottom, said process being characterized by the following steps:
- molding a pattern on adequate area of a flat blank in the part thereof to become the vessel bottom;
- clamping an external part of said blank only outside of said molded pattern;
- and
- forming the side wall of the vessel by drawing a part outside the clamped part of said blank while said clamping is maintained.
1 more element
Dependencies are inferred from the claim text.