Patent ID: 7879274
Filing Date: 2011-02-01
Classification: B29C,B65H

Abstract:
1. A method of moulding an end plug having only two-pieces, said end plug being configured for insertion into an open end of a paper roll, said end plug having only two-pieces comprising an integrally formed inner piece and an outer piece rotatably attached to said inner piece, said inner and outer pieces being prevented from axial movement in relation to each other by at least one protrusion of one of the inner and outer pieces running in an annular groove in an other of said inner and outer pieces, wherein one of the inner and outer pieces of said end plug having only two-pieces is part of a mould for moulding the other of said inner and outer pieces, said method comprising: forming the outer piece from a first plastic material in a molten state; allowing the outer piece to cool and harden; and forming the integrally formed inner piece only from a second plastic material, said second plastic material having a lower melting point than the first plastic material, the second plastic material being incompatible with the first plastic material so that the integrally formed inner piece will not adhere to an exposed inner surface of the outer piece.