Metal treatment – Compositions – Heat treating
Patent
1990-07-12
1992-03-17
Yee, Deborah
Metal treatment
Compositions
Heat treating
148 12B, C21D 926
Patent
active
050965069
ABSTRACT:
Metallic card clothing is illustrated having sharp metallic points C at tips of teeth 32 formed by punching and thereafter exerting a mechanical force bending metal over at the tips of the teeth.
REFERENCES:
patent: 4653152 (1987-03-01), Wada
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