Moulding apparatus

Claim 1

MOULDING APPARATUS FOR THE COMPRESSION MOULDING OF PLASTIC METERIALS COMPRISING A RING MOULD CARRIER SUPPORTED FOR ANGULAR MOVEMENTS ABOUT A VERTICAL AXIS, A PLURALITY OF ALTERNATIVE RING-SHAPED MOULD MEMBERS SUPPORTED ON SAID CARRIER WITH THEIR AXIS DISPOSED VERTICALLY, MEANS OPERABLE TO ACTUATE SAID MOULD CARRIER INTERMITTENTLY WHEREBY SAID RING-SHAPED MOULD MEMBERS ARE SUCCESSIVELY MOVED TO AND ARRESTED AT A MOULDING STATION, A VETICALLY MOVABLE PLUNGER MEMBER ARRANGED AT THE MOULDING STATION AND NORMALLY DISPOSED ABOVE THE LEVEL OF THE UPPER ENDS OF THE RING-SHAPED MOULD MEMBERS SAID PLUNGER MEMBER BEING ADAPTED TO ENTER THE OPERATIVE RINGSHAPED MOULD MEMBER AND SEAT AGAINST THE INNER SURFACE THEROF, SAID PLUNGER MEMBER AND SAID RING MOULD MEMBER TOGETHER FORMING THE MALE PORTION OF THE MOULD, A VERTICALLY MOVEABLE LOWER MOULD MEMBER OF FEMALE FORM ARRANGED COAXIALLY BELOW SAID PLUNGER MEMBER AND NORMALLY DISPOSED BELOW THE LEVEL OF THE LOWER ENDS OF THE RINGSHAPED MOULD MEMBERS, SAID LOWER MOULD MEMBER BEING FORMED IN ITS UPPER SURFACE WITH A CAVITY OF SUFFICIENT CAPACITY OF HOLD THE AMOUNT OF MOLDING MATERIAL REQUIRED