| (19) |
 |
|
(11) |
EP 0 493 133 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
24.02.1993 Bulletin 1993/08 |
| (43) |
Date of publication A2: |
|
01.07.1992 Bulletin 1992/27 |
| (22) |
Date of filing: 27.12.1991 |
|
| (51) |
International Patent Classification (IPC)5: C25D 11/38 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB NL |
| (30) |
Priority: |
28.12.1990 JP 409582/90
|
| (71) |
Applicant: TOYO SEIKAN KAISHA LIMITED |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Sato, Nobuyuki
Ebina-shi,
Kanagawa-ken (JP)
- Imazu, Katsuhiro
Yokohama-shi,
Kanagawa-ken (JP)
|
| (74) |
Representative: Woodcraft, David Charles et al |
|
BROOKES & MARTIN
High Holborn House
52/54 High Holborn
London, WC1V 6SE
London, WC1V 6SE (GB) |
|
| |
|
| (54) |
Deeply drawn can and method of producing the same |
(57) A deeply drawn seamless can obtained by deeply drawing a steel plate having an organic
coating which has corrosion resistance large enough to withstand highly corrosive
acidic contents such as acidic beverages and sports beverages.
A tin-containing metal is applied onto the surface of the steel plate in a sea-island
relationship maintaining a coating rate of 20 to 80% and, then, metal chromium and
a hydrated chromium oxide are applied thereon in order to form an organic resin coating
layer on the steel plate. The thus obtained can material is deeply drawn to form a
can.