Punching machine

Cutting – Means to drive or to guide tool – Unicyclic

Patent

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Details

83571, 83620, 83633, B26F 106

Patent

active

040006735

ABSTRACT:
A machine for punching a series of aligned holes in suitable stock, e.g., for forming binding holes in a stack of sheet material such as paper. The machine is electrically operated and generally includes a pressure bar which is guidingly constrained for movement along a vertical plane. A plurality of punches and coating dies are included and are arranged in a row and suitably attached to base structure directly beneath the pressure bar. Downward movement of the pressure bar is effective to drive the lower portions of selected ones of the punches into the respective dies and upward movement of the pressure bar is effective to return those driven punches, thus constituting one cycle thereof. A pair of lever arms are provided, having one of the ends thereof coupled to the pressure bar and being pivotally attached to the base and are suitably power driven by structure including a clutch which is operably coupled to the other ends of the lever arms for causing reciprocating movement thereof. Also included is switching structure for selectively causing the clutch to be engaged to drive the punches through the described cycle.

REFERENCES:
patent: 858066 (1907-06-01), Fehr
patent: 1159161 (1915-11-01), Bernhagen
patent: 1920999 (1933-08-01), Murch
patent: 2630467 (1953-03-01), Winther
patent: 3072003 (1963-01-01), Sirugue
patent: 3153966 (1964-10-01), Fredrick et al.
patent: 3416392 (1968-12-01), Rutz
patent: 3592092 (1971-07-01), Blowsky

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