Device for the manufacture of self-sustaining cups of thin paper
AssigneeEcopack GmbH & Co.
InventorsLuigi Ferri, Francesco Ferri
Life of this patent
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Abstract
A frustoconical matrix and a punch of a complementary shape and coaxial to the former can be brought together to shape an inserted sheet of thin paper. The matrix has a cylindrical peripheral surface along which a beading member comprising a cylindrical foil is slidable in a close running fit. A shoulder extends coaxially to the punch to define a pit having a cylindrical internal wall having a diameter smaller than the outside diameter of the beading member. Heating means are controllable to heat the shoulder to a temperature such that the pit is expanded to a diameter of close running fit between its internal wall and the beading member.
Claims8
A device for manufacture of self-sustaining cups of thin paper, comprising a frustoconical matrix and a punch of a complementary shape and coaxial to the former, the matrix and the punch being adapted to be brought together to shape an inserted sheet of said thin paper, wherein
- the matrix has a cylindrical peripheral surface along which a beading member comprising a cylindrical foil is slidable with a close running fit;
- a shoulder extends coaxially to the punch to define a pit having a cylindrical internal wall having a diameter smaller than the outside diameter of the beading member;
- heating means are controllable to heat the shoulder to a predetermined temperature such that the pit is expanded to a diameter of close running fit between its internal wall and the beading member.
Dependencies are inferred from the claim text.