UPPER MAGNETIC PLATE
The upper plate contains a serie of strategically distributed bobbins that generate a constant magnetic field in the whole surface on having been crossed by an electrical current, which must be kept at all time.
The punches, positioned by means of centring devices, stay magnetized and fixed in the wished position. The plate is provided with a heating system formed by a set of internal resistances that warm the plate of homogeneous form. This type of plates facilitate the change of formats since they allow to position all kind of punches.