Closure for pharmaceutical containers and method for sealing a bottle
A closure for a pharmaceutical vial. The closure comprises an aluminum foil with an inductively meltable adhesive, an elastic seal, and a cap. The cap has an opening through which a perforating cannula can be inserted.
1. A closure for pharmaceutical packages, comprising:
a cap made of a dielectric material and attachable on a vial;
a metal foil which in its assembled state rests on a rim of said vial, wherein at least on a surface that rests on the rim the metal foil is provided with an adhesive which is meltable inductively through the metal foil; and
an elastic seal inserted above the metal foil;
wherein the cap has a base wall with at least one opening through which the elastic seal and the metal foil can be perforated;
wherein the elastic seal is adapted so that once the cap has been applied on the vial the metal foil is already sealingly pressed onto the rim of the vial without the adhesive having been melted yet; and
wherein the closure is a snap-on closure.
2. The closure as claimed in claim 1 , wherein the snap-on closure is designed so that it cannot be removed without being destroyed.
3. The closure as claimed in claim 1 , wherein the metal foil is an aluminum foil.
4. The closure as claimed in claim 1 , wherein the elastic seal is rotatable relative to the metal foil.
5. The closure as claimed in claim 1 , wherein the cap or the elastic seal is made of a transparent material.
6. The closure as claimed in claim 1 , wherein the cap has claws for being latched on a collar of the vial, wherein the claws are distributed around the circumference of the cap covering a maximum of 180° in total.
7. The closure as claimed in claim 1 , wherein the cap has claws for being latched on a collar of the vial, and wherein the cap has openings in its base wall above the claws.
8. The closure as claimed in claim 1 , wherein the cap has claws for being latched on a collar of the vial, wherein the metal foil and the elastic seal are retained in the cap by the claws.
9. A package comprising a vial with a closure as claimed in claim 1 .
10. The package as claimed in claim 9 , wherein the package is filled with bone cement monomer.
11. A mixing device for bone cement, comprising a package according to claim 10 , which is filled with bone cement monomer.
12. A method for sealing a vial with a closure for pharmaceutical packages which comprises
a cap made of a dielectric material and attachable on a vial;
a metal foil which in its assembled state rests on a rim of said vial, wherein at least on a surface that rests on the rim the metal foil is provided with an adhesive which is meltable inductively through the metal foil; and
an elastic seal inserted above the metal foil;
wherein the cap has a base wall with at least one opening through which the elastic seal and the metal foil can be perforated; and
wherein the method comprises the steps of:
filling the vial;
then applying the closure in an aseptic area, wherein the vial is already sealed when the closure is applied; and
subsequently heating the metal foil by induction so that the adhesive melts thereby creating a material bond between the metal foil and a rim of the vial, wherein the inductive heating of the metal foil is performed after leaving the aseptic area.
13. The method for sealing a vial as claimed in claim 12 , wherein after the material bond has been created between the metal foil and the rim, the vial is sterilized externally using a gas.