Bradbury, F. (Fred) · Manchester : John Heywood Ltd. · leaf 324
at the back, and a1, b1, c1, d1 and e1, at the front, all ofwhich are at right angles to the punches, but immediately above DESIGN PREPARATION AND CARD STAMPING. 319 them. Each key is circumscribed, near its centre, by a spiralspring, enclosed within the punch box, as shown. These springsoperate to…
Textile machinery
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