by screw means

Full Title

Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen > by screw means

Child Classifications

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• B30B 1/181
• B30B 1/183
• B30B 1/185
• B30B 1/186
• B30B 1/188
• B30B 1/20 driven by hand
• B30B 1/22 driven through friction disc means
• B30B 1/23 operated by fluid-pressure means