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-11040905-B2
Application number	US-201815979797-A
Country	US
Kind code	B2
Filing date	May 15, 2018
Priority date	Sep 30, 2004
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

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 system for producing a glass medical container from a glass blank, the system comprising:
a first forming stage comprising a shape-forming tool that forces the glass blank into conforming engagement with a first pin having a circumference having a first diameter around which the glass blank is preliminarily formed to create a preliminary channel, wherein the first pin is positioned with respect to the shape-forming tool and the first diameter is smaller than a diameter of an opening in the glass blank such that, when the glass blank is received in the first forming stage, the shape-forming tool is on an exterior of the glass blank and the pin extends through the opening in the glass blank prior to forming of the glass blank around the circumference of the first pin by the shape-forming tool to form a preliminarily formed glass blank; and
a second forming stage comprising a shape-forming tool that forces the glass blank into conforming engagement with a second pin having a circumference having a second diameter around which the preliminarily channel is further formed to create a finished channel in the finished medical container, wherein the second pin is positioned with respect to the shape-forming tool of the second forming stage and the second diameter is smaller than an inner diameter of the preliminary channel such that, when the preliminarily formed glass blank is received in the shape-forming tool of the second forming stage, the second pin extends into the preliminary channel of the preliminarily formed glass blank prior to forming of the preliminary channel around the circumference of the second pin by the shape-forming tool of the second stage to form the medical container,
wherein the first pin comprises a material that includes tungsten or a derivative thereof and the second pin comprises platinum or platinum group metals, metals or alloys containing nickel, silicides, and combinations thereof, and
wherein the first diameter is greater than the second diameter.

2. The system of claim 1 , further comprising a heating source for heating the glass blank prior to entering the first forming stage.

3. The system of claim 1 , wherein the first diameter of the first pin and/or the second diameter of the second pin is constant along a length.

4. The system of claim 1 , wherein the first pin comprises a first portion having a circumference having the first diameter and a second portion having a circumference having a third diameter that is different from the first diameter and/or the second pin comprises a first portion having a circumference having the second diameter and a second portion having a circumference having a fourth diameter that is different from the second diameter.

5. The system of claim 4 , wherein the first diameter and/or the second diameter is 0.6 mm and the third diameter and/or the fourth diameter is 0.2-0.4 mm.

6. The system of claim 1 , further comprising an inert gas source that introduces an inert gas around the area in which the first pin and the second pin are used to reduce the oxygen content in that area.

Assignees

• Becton Dickinson Co

Inventors

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

Classifications

• 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

• C03B23/092 Primary

  by pressing · CPC title

• A61M5/3129

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

• 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