Koninklijke Emballage Industrie Van Leer B.v.

Frans A Tasseron

This invention relates to a bushing structure having a bushing (1) and a polygonal flange (2) said flange initially being formed with a circular circumference (5) having an outer diameter equal to the diameter of the inscribed circle (14) of the polygon to be made whereafter by means of cold deformation the material of the flange at the location of the angles of the polygon to be made is forced to flow outwards by means of a die pressed into the flat surface of the flange, the die having projections, the inner surfaces of which are steep with respect to the axis of the die and the bottom surface of which run obliquely and arching by upwards and outwards the radial width of said projections decreasing from the center to both sides.

Bushing having a polygonal flange

The invention relates to a method and a tool (6,8) for producing a bushing structure (1,2) having a bushing (1) and a polygonal flange (2) said flange initially being formed with a circular circumference (5) having an outer diameter equalling the diameter of the inscribed circle (5) of the polygon to be made whereafter by means of cold deformation the material of the flange at the location of the angles of the polygon to be made is forced to flow outwards by means of a die (8) having projections (9) the inner surfaces (10) of which are steep with respect to the axis of the die and the bottom surface (11) of which run obliquely and arching by upwards and outwards the radial width of said projections decreasing from the center to both sides.

Method and tool for producing a bushing structure having a polygonal

A lockable cap for a screw top container having an annular element with a plurality of upwardly extending hooks, the element is held in place by a groove beneath the container screw threads. The cap has an annular wall defining an inverted U-shaped hollow into which the hooks project and lock the cap. The hooks can be manually compressed radially-inwardly to unlock them.

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Heemstede, Netherlands

Frans A Tasseron