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US 8,998,853 B2Granted
Syringe body/needle assembly and method for producing same
AssigneeSchott AG
InventorsBernd Hoppe, Daniela Seiler, Andreas Roters, Katrin Schellenberg
Life of this patent
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Abstract
A syringe body/needle assembly and a method for producing such a syringe body/needle assembly are provided that if free of an organic adhesive bond.
Claims11
A method for producing a syringe body/needle assembly, comprising the steps of:
- selecting a frequency range of electromagnetic radiation, a first material, and a second material, so that, upon irradiation of the first and second material, the first material absorbs more electromagnetic radiation than the second material and the first material melts;
- providing a needle and a syringe body having a nozzle, the nozzle comprising the first material and a remaining portion of the syringe body comprising the second material;
- positioning the syringe body and the needle in a relationship for bonding the needle with the syringe body;
- irradiating the syringe body with the electromagnetic radiation at least in the region of the nozzle to cause the first material to melt at least partially thus fixing the needle in a hermetically sealing way in the syringe body;
- and
- cooling the syringe body/needle assembly, wherein the nozzle further comprises at least one connecting body, the at least one connecting body comprising the first material, and wherein the at least one connecting body comprises a glass capillary portion.
3 more elements
A method for producing a syringe body/needle assembly, comprising the steps of:
- selecting a frequency range of electromagnetic radiation, a first material, and a second material, so that, upon irradiation of the first and second material, the first material absorbs more electromagnetic radiation than the second material and the first material melts;
- providing a needle and a syringe body having a nozzle, the nozzle comprising the first material and a remaining portion of the syringe body comprising the second material;
- positioning the syringe body and the needle in a relationship for bonding the needle with the syringe body;
- irradiating the syringe body with the electromagnetic radiation at least in the region of the nozzle to cause the first material to melt at least partially thus fixing the needle in a hermetically sealing way in the syringe body;
- cooling the syringe body/needle assembly;
- and
- relieving residual stresses still existing in at least the syringe body induced by irradiating the first material.
4 more elements
A method for producing a syringe body/needle assembly, comprising the steps of:
- providing a needle and a syringe body having a nozzle, the nozzle comprising a first material that absorbs more electromagnetic radiation than a second material of the syringe body;
- positioning the syringe body and the needle in a relationship for bonding the needle with the syringe body;
- irradiating the first material with electromagnetic radiation at least in the region of the nozzle to cause the first material to melt at least partially;
- cooling the syringe body/needle assembly to hermetically sealingly fix the needle in the syringe body;
- and
- heating at least the syringe body until it reaches at least a strain point at a viscosity of η=1014,5 dPa·s.
3 more elements
Dependencies are inferred from the claim text.