Apparatus for moulding articles from plastics material

Claim 1

APPARATUS FOR FORMING ARTICLES FROM SHEET PLASTIC MATERIAL COMPRISING TWO PARALLEL ARRANGED, RELATIVELY MOVABLE PLATENS RESPECTIVELY PROVIDING CO-OPERATING TOOL MEANS ADAPTED, WHEN THE PLATENS ARE DISPOSED IN THEIR OPERATIVE POSITIONS, TO FORM AN ARTICLE FROM A SECTION OF A SHEET OF HOT PLASTICS MATERIAL DISPOSED BETWEEN THE PLATENS, MEANS FOR EFFECTING RELATIVE MOVEMENT OF THE PLATENS TOWARD ONE ANOTHER, STOP MEANS HAVING PARTS WHICH ENGAGE WHEN THE PLATENS REACHED THEIR OPERATIVE POSITIONS AND SERVE TO RETAIN THE PLATENS IN THESE POSITIONS AGAINST THE ACTION OF THE MOVING MEANS, CUTTING MEANS FIXEDLY SECURED TO ONE OF THE PLATENS, REMOTELY OF THE STOP MEANS, AND SO ARRANGED THAT THE PERIPHERY OF THE SHEET SECTION IS ENGAGED FROM OPPOSITE SIDES OF THE SHEET BY THE CUTTING MEANS AND FACING PARTS OF THE OTHER PLATEN, RESPECTIVELY WHEN THE PLATENS ARE IN THEIR OPERATIVE POSITIONS, AND MEANS FOR CAUSING THE CUTTING MEANS AND THE SAID FACING PARTS TO BE URGED TOGETHER MORE STRONGLY, WHEREBY THE INHERENT FLEXIBILITY OF A PLATEN ALLOWS FURTHER, LIMITED RELATIVE MOVEMENT BETWEEN THE CUTTING MEANS AND THE SAID FACING PARTS SUFFICIENT TO CAUSE THE SHEET OF THE CUT ALONG AT LEAST MAJOR PART OF THE PERIPHERY OF THE SECTION.