Vial and method for producing the same

Patent metadata

Field	Value
Publication number	US-10894735-B2
Application number	US-201715668464-A
Country	US
Kind code	B2
Filing date	Aug 3, 2017
Priority date	May 16, 2005
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A method for producing a vial with low alkali elution by removing a deteriorated region caused by processing on an internal surface of a vial is disclosed. The method involves forming vials from borosilicate glass tubes including a first step of forming a borosilicate glass tube into a cup-shaped body by formation of a bottom of a vial, and a second step of forming the cup-shaped body into the vial by formation of a mouth of the cup-shaped body.

First claim

The invention claimed is:

1. A method for producing a vial as a product wherein the method comprises the steps of:
providing as a preform a container for the vial having a bottom made of a borosilicate glass tube, and
intensely heating only an inner surface of the container as the preform with oxygen-gas flame such that the flame changes from an early blue flame to a yellow flame with increasing temperature so as to obtain the vial as the product.

2. The method according to claim 1 wherein the step of intensely heating is carried out such that a flame reaction of sodium present in the container as the preform of the borosilicate glass tube is caused.

3. The method according to claim 2 , wherein the inner surface to be intensely heated is present from a bottom toward an opening of the container by a certain distance where a deteriorated region caused by forming is present.

4. The method according to claim 1 wherein the oxygen-gas flame is oxygen-town gas flame.

5. The method according to claim 1 wherein the oxygen-gas flame is produced by a point burner.

6. The method according to claim 1 , wherein the inner surface to be intensely heated is present from a bottom toward an opening of the container by a certain distance where a deteriorated region caused by forming is present.

Assignees

• Nipro Corp

Inventors

• Kuwabara Hideo
• Yamauchi Hideki
• Ishimi Yoshitaka
• Senga Shinichiro

Classifications

• B65D1/26

  Thin-walled containers, e.g. formed by deep-drawing operations {(B65D1/165 takes precedence)} · CPC title

• A61J1/06

  Ampoules or carpules (syringe ampoules or carpules A61M5/28) · CPC title

• C03B23/18 Primary

  Re-forming and sealing ampoules · CPC title

• B65D1/00

  Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material (with curved or partially-curved cross-section made by winding or bending paper B65D3/00; with polygonal cross-section formed by folding B65D5/00; specially constructed to be opened by cutting, piercing or tearing of wall portions B65D17/00; rigid pallets with side walls B65D19/02) · CPC title

• C03B23/09 Primary

  Reshaping the ends, e.g. as grooves, threads or mouths · CPC title