Method for producing medical glass container and burner for inner surface treatment of medical glass container
AssigneeNipro Corporation
InventorMasamichi Wada
Life of this patent
Estimating the term…
Abstract
To provide a measure for reducing the leaching values of alkali components defined in ISO4802 and the like as much as possible in a glass container for use in storage or the like of pharmaceuticals or the like. The measure includes a container converting process of processing a glass tube into a container shape having a bottom and an opening to form a vial and a fire blast process of scanning an inner surface of the vial with a flame of a point burner while emitting the flame to an internal space of the vial and applying the flame to the inner surface.
Claims4
A method for producing a medical glass container having a mouth opening inner diameter that is less than an internal space diameter, comprising:
- processing a glass tube into the glass container having the mouth opening and a bottom;
- angling a point burner relative to an axis of the glass container;
- positioning a distal end of a nozzle of the point burner at a fixed distance from an inner sidewall surface of the glass container so as to emit a plasma rich portion of a flame from the nozzle onto the inner sidewall surface of the glass container at a bottom of the glass container;
- and
- scanning the flame alone the inner sidewall surface, said scanning comprising moving the point burner axially relative to the glass container inner sidewall while rotating glass container about said axis, wherein the nozzle maintains said fixed distance from a nearest portion of the inner sidewall during said point burner moving and glass container rotating.
Dependencies are inferred from the claim text.