Method for reducing or eliminating residue in a glass container and a glass container made in accordance therewith

Patent metadata

Field	Value
Publication number	US-9994477-B2
Application number	US-201514853276-A
Country	US
Kind code	B2
Filing date	Sep 14, 2015
Priority date	Sep 30, 2004
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A method of preparing a glass medical container is provided including the steps of providing a glass blank and forming a channel through a part of the glass blank, the channel being substantially free of tungsten or derivatives thereof. In a further aspect of the subject invention, a glass medical container is provided including a glass body having a channel extending through a part of the glass body, the channel being substantially free of tungsten or derivatives thereof. With the subject invention, tungsten or derivatives thereof can be generally or altogether completely avoided in glass medical containers.

First claim

What is claimed is:

1. A method of producing a glass medical container comprising:
providing a glass blank;
providing a pin at an opening in said glass blank;
heating said glass blank;
introducing an inert gas into an environment surrounding said pin at least while the glass blank is being heated; and
forming said glass blank to conformingly engage said pin to form a channel,
wherein the pin comprises a metal selected from the group consisting of: platinum or platinum group metals; metals or alloys containing nickel; silicides; and combinations thereof.

2. The method of claim 1 , wherein said forming step comprises forming said glass blank to form a channel having a length and defining a diameter that is constant along said length.

3. The method of claim 2 , wherein said forming step comprises forming said glass blank to form a channel having a length and defining a diameter that varies along said length, and wherein said forming step comprises forming said glass blank to form a channel having a first portion defining a first constant diameter and a second portion defining a second constant diameter, said first diameter being larger than said second diameter.

4. The method of claim 3 , wherein said first constant diameter is 0.6 mm and said second constant diameter is in the range of 0.2 to 0.4 mm.

5. The method of claim 1 , wherein said forming step comprises thermally manipulating said glass blank at a temperature in the range of 600 to 900° C.

6. The method of claim 5 , wherein said channel is substantially free of tungsten or derivatives thereof.

7. The method of claim 1 , wherein said glass blank is unwashed before or after said forming step.

8. The method of claim 1 , wherein the inert gas is nitrogen.

9. A method of producing a glass medical container comprising:
providing a glass blank;
providing a pin at an opening in said glass blank;
heating said glass blank;
introducing an inert gas into an environment surrounding said pin at least while the glass blank is being heated; and
forming said glass blank to conformingly engage said pin to form a channel.

10. The method of claim 9 , wherein said forming step comprises forming said glass blank to form a channel having a length and defining a diameter that is constant along said length.

11. The method of claim 10 , wherein said forming step comprises forming said glass blank to form a channel having a length and defining a diameter that varies along said length, and wherein said forming step comprises forming said glass blank to form a channel having a first portion defining a first constant diameter and a second portion defining a second constant diameter, said first diameter being larger than said second diameter.

12. The method of claim 11 , wherein said first constant diameter is 0.6 mm and said second constant diameter is in the range of 0.2 to 0.4 mm.

13. The method of claim 9 , wherein said forming step comprises thermally manipulating said glass blank at a temperature in the range of 600 to 900° C.

14. The method of claim 13 , wherein said channel is substantially free of tungsten or derivatives thereof.

15. The method of claim 9 , wherein said glass blank is unwashed before or after said forming step.

16. The method of claim 9 , wherein the inert gas is nitrogen.

Assignees

• Becton Dickinson Co

Inventors

• Prais Alfred W
• Cocheteux Bruno
• Cortes Arturo
• Delabie Patrice
• Wales Edouard
• Luedtka Richard D
• Schaecher Randy
• Vulliet Daniel

Classifications

• A61J1/00

  Containers specially adapted for medical or pharmaceutical purposes (capsules or the like for oral use A61J3/07; specially adapted for surgical or diagnostic appliances or instruments A61B50/30; containers for radioactive substances G21F5/00) · CPC title

• A61M5/3129

  Syringe barrels (A61M5/3205 and A61M5/50 take precedence) · CPC title

• C03B23/092 Primary

  by pressing · CPC title

• A61M5/34

  Constructions for connecting the needle {, e.g. to syringe nozzle or needle hub (connecting catheter tubes to hubs A61M25/0014)} · CPC title

• A61M5/3134

  characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula · CPC title