Characteristics

The universal perforating machine ( UPM ) is composed of a stationary column with 3 arms used for driving, the film unrolling and the film uprolling operations, and of an interchangeable table - based machine with a punching part, a film guidance, light marking unit, dust evacuation unit, sling regulator and a prepier-cing and transport unit. The machine works with intermittent feed, with each punching stroke the film is adjusted by catching needles. The punches are held by a highly precise prismatic ram on roller bearings. The starting part of the film is automatically pre - pierced and fed into the punching part and farther into the feeding installation. A loop regulation holds the loose film string ( loop ) in front of the punching part, within certain limits, at a constant value.