Laminated pack comprising a plurality of closely superposed sheets and method and device for forming the pack

Abstract

Abstract A laminated pack comprises a plurality of uniform, closely adjacent superposed sheets and a mechanical interconnection for said sheets holding them together which comprises the pinching of a portion of the sheets themselves against one another. The interconnection is effected by slitting the sheets in areas to form teeth on each side of a hole formed through the sheet or along an edge of the sheet and by subsequently deflecting the teeth in a stacked set of sheets so that adjacent ones of the teeth move into recesses vacated by similarly deflected teeth of the next adjacent sheet and fit into the area with a pinching interengagement. The pack is formed by feeding prestamped sheets along a feed path and separating and stacking individual sheets therefrom in a direction perpendicular to the advance direction of the strip and also pinching the sheet so that teeth formations of superposed sheets bear into the next adjacent sheet to hold them together. The apparatus advantageously includes a stamping tool designed as a combined tool and stacking mechanism which is mounted in a recess of a die plate which comprises two feed rollers having axes which are parallel to each other into the direction of a strip containing the prestamped sheets. The mechanism includes a plurality of contacting projections and a punching mechanism mounted above the recess separating the prestamped sheets from the fed strip and a punch which acts on teeth formations of the sheets to cause their pinching interengagement.

Inventors

• 👤 Rolf Beenken

Bibliographic Details