Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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43/00
Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
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B21D43/02
Advancing work in relation to the stroke of the die or tool
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B21D43/04
by means in mechanical engagement with the work
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B21D43/05
specially adapted for multi-stage presses
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B21D43/057
Devices for exchanging transfer bars or grippers; Idle stages, e.g. exchangeable
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