Container Closure
AssigneeObrist Closures Switzerland GmbH
InventorsDerek Hindle, Peter Pargen
Life of this patent
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Abstract
A moulded closure base includes a sidewall and a top plate. The sidewall has a retention projection having a retention surface for engaging a complementary projection on a container neck. The top plate has one or more access slots through which part of a die extends during moulding to form the retention surface.
Claims21
1-49. (canceled)
A moulded closure base for providing at least part of a container closure, the base including a sidewall and a top plate, the sidewall having a retention projection having a retention surface for engaging a complementary projection on a container neck, the top plate having one or more access slots through which part of a die has extended into, and has been withdrawn from, during moulding to form the retention surface.
A method of forming a closure base, comprising:
- moulding a body including a sidewall and a top plate;
- and
- moulding a retention projection on the sidewall;
- in which the tooling for moulding at least part of the retention projection is introduced through the top plate.
A method of moulding a closure base comprising the steps of:
- moulding a body including a sidewall and a top plate, the sidewall including one or more retention projections;
- introducing a die component through a mould cavity space which will form part of the top plate as part of step (a);
- moulding the body;
- and
- withdrawing the die component through one or more slots which have been formed in the top plate by the die component, such that the body retains the slot(s) after being demoulded.
Dependencies are inferred from the claim text.