Glass container with an improved bottom geometry

Patent metadata

Field	Value
Publication number	US-11014701-B2
Application number	US-201916394527-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	May 18, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A glass container for packaging a pharmaceutical composition including a glass tube with a first end and a second end, the glass tube having a wall thickness dw, a glass bottom having an outer area, and the glass bottom closes the glass tube at the first end. The glass container further including a curved glass heel extending from the outer area of the glass bottom to the first end of the glass tube. The curved glass heel is defined by an outer radius ro, an inner radius ri and a thickness of the glass dh in the curved glass heel, further wherein dh3/(ro×dw)>0.8 mm.

First claim

What is claimed is:

1. A glass container for packaging a pharmaceutical composition, comprising:
a glass tube with a first end and a second end, the glass tube having a wall thickness (d w );
a glass bottom having an outer area, wherein the glass bottom closes the glass tube at the first end;
a curved glass heel extending from the outer area of the glass bottom to the first end of the glass tube, wherein the curved glass heel is defined by an outer radius (r o ), an inner radius (r i ) and a thickness of the glass (d h ) in the curved glass heel, and further wherein:
d h 3 /( r o ×d w )>0.8 mm.

2. The glass container according to claim 1 , wherein r i >0.7 mm.

3. The glass container according to claim 2 , wherein r i >0.9 mm.

4. The glass container according to claim 2 , wherein r i >1.2 mm.

5. The glass container according to claim 1 , wherein r i +d h −r o >0 mm.

6. The glass container according to claim 5 , wherein r i +d h −r o >0.25 mm.

7. The glass container according to claim 5 , wherein r i +d h −r o >0.75 mm.

8. The glass container according to claim 1 , wherein the glass tube is a cylindrical glass tube and wherein the glass bottom is a circular glass bottom.

9. The glass container according to claim 8 , wherein the circular glass bottom has a thickness that varies within the area from a center of the circular glass bottom to the outer area of the circular glass bottom, wherein a minimum thickness of the circular glass bottom is (d b,min ) and wherein d h /d b,min <3.0.

10. The glass container according to claim 9 , wherein d h /d b,min <2.0.

11. The glass container according to claim 9 , wherein d h /d b,min <1.2.

12. The glass container according to claim 1 , wherein the glass container further includes a coating that at least partially superimposes at least one of an exterior surface and an interior surface of the glass tube.

13. The glass container according to claim 1 , wherein the glass container is at least one of thermally tempered and chemically tempered.

14. The glass container according to claim 1 , wherein the glass container further comprises a top region with an inner diameter is (d t ) and a body region in which an inner diameter of the glass tube is (d b ), wherein d b >d t .

15. The glass container according to claim 14 , wherein the glass container further comprises a shoulder that connects the body region with the top region, and the shoulder includes a shoulder angle α that is in the range from 10° to 70°.

16. The glass container according to claim 15 , wherein throughout the body region the wall thickness (d w ) of the glass tube is in a range from 0.2 mm, based on a mean value of this wall thickness (d w ) in the body region.

17. The glass container according to claim 1 , wherein the glass container has an interior volume (V i ) in a range from 2 to 150 ml.

18. The glass container according to claim 1 , wherein the glass container includes one of a borosilicate glass, an aluminosilicate glass, a soda lime glass, and a fused silica.

19. The glass container according to claim 1 , wherein d h 3 /(r o ×d w )>1.2 mm.

20. The glass container according to claim 1 , wherein d h 3 /(r o ×d w )>2.0 mm.

Assignees

• Schott Ag

Inventors

• Langsdorf Andreas
• Thomas Peter
• Maurer Florian
• Kummer Hanspeter
• Mutlu Fatih

Classifications

• B65D13/02

  of glass, pottery, or other ceramic material · CPC title

• B65D1/09

  Ampoules · CPC title

• B65D1/0261 Primary

  Bottom construction (B65D1/06 takes precedence) · CPC title

• B65D23/0814

  characterised by the composition of the material · CPC title

• C03B23/045

  Tools or apparatus specially adapted for re-forming tubes or rods in general, e.g. glass lathes, chucks (C03B23/043 takes precedence) · CPC title