Plastic closure part with severable membrane
AssigneeBericap Holding GmbH
InventorGünter Krautkrämer
Life of this patent
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Abstract
The invention concerns a plastic closure part (10) which can be fixed to a container or a further closure part to be fixed to the container, comprising a tubular discharge portion (3) whose cross-section is closed by a membrane (7) which has a tear line (8) extending peripherally over more than 180° along its outer edge and a corresponding method for the production of such a closure. In order to develop a closure part having the features set forth in the opening part of this specification and a method for the production thereof to the effect that the problems occurring upon injection moulding due to narrow flow passages are eliminated it is provided according to the invention that the tear line (8) is formed by a cut introduced into the material of the membrane (7) with a cutting or punching tool.
Claims20
A plastic closure part which can be fixed to a container or a further closure part to be fixed to the container, comprising:
- a tubular discharge portion whose cross-section is closed by a membrane which has a tear line extending peripherally over more than 180° along its outer edge, characterised in that the tear line is formed by a cut introduced into the material of the membrane with a cutting or punching tool, and wherein the cut is introduced after injection moulding of the plastic closure.
A method of producing a plastic closure part which can be fixed to a container or a further closure part to be fixed to the container, the method comprising:
- injection moulding the plastic closure part in an injection moulding mould, the plastic closure part having a tubular discharge portion whose cross-section is closed by a membrane;
- and
- forming an incision that extends peripherally over more than 180° along an outer edge of the membrane, wherein the incision defines a tear line for the membrane, is formed after the injection moulding operation and at least partial hardening of the plastic closure part, and is formed by a cutting or punching tool.
Dependencies are inferred from the claim text.