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Progressive former with removable tooling
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Patent number 4,631,950
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Issue date Dec 30, 1986
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The National Machinery Company
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Thomas E. Hay
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Forging machine transfer
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Patent number 4,398,408
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Issue date Aug 16, 1983
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The National Machinery Company
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Robert E. Wisebaker
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Automatic tool changer for forging machines
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Patent number 4,304,041
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Issue date Dec 8, 1981
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The National Machinery Company
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Gaylen O. Kline
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Transfer mechanism
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Patent number 3,965,718
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Issue date Jun 29, 1976
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The National Machinery Company
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Gaylen O. Kline
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...