A production method for a closed glass container containing at least one solid body is disclosed. The method includes providing a tube tapering toward one end, the inner diameter of which is smaller at a tapered end than an inner diameter at an opposite first end. The tube is connected at the tapered end to a first end of a straight bar tube. The tapered tube is charged with at least one solid body.

A production method for a closed glass container containing at least one solid body is disclosed. The method includes providing a tube tapering toward one end, the inner diameter of which is smaller at a tapered end than an inner diameter at an opposite first end. The tube is connected at the tapered end to a first end of a straight bar tube. The tapered tube is charged with at least one solid body.

The present invention relates to a method for manufacturing an exterior part for a timepiece or piece of jewelry made of Murano glass, said method comprising the following steps: providing a material formed of glass rods (2), also referred to as glass tubes, arranged side by side; multi-cycle heat treatment to consolidate the material and form a blank; machining the blank to produce the exterior part, the method being characterised in that the heat treatment comprises a first cycle (a) consisting of heating the material from a temperature less than or equal to 100° C. to a temperature between 450 and 650° C. at a heating rate between 4 and 12° C./min in order to avoid the formation of air bubbles during the manufacturing of the blank. It also relates to the exterior part for a timepiece or piece of jewelry, in particular a watch case, having a structure with few or no air bubbles.

The present invention relates to a method for manufacturing an exterior part for a timepiece or piece of jewelry made of Murano glass, said method comprising the following steps: providing a material formed of glass rods (2), also referred to as glass tubes, arranged side by side; multi-cycle heat treatment to consolidate the material and form a blank; machining the blank to produce the exterior part, the method being characterised in that the heat treatment comprises a first cycle (a) consisting of heating the material from a temperature less than or equal to 100° C. to a temperature between 450 and 650° C. at a heating rate between 4 and 12° C./min in order to avoid the formation of air bubbles during the manufacturing of the blank. It also relates to the exterior part for a timepiece or piece of jewelry, in particular a watch case, having a structure with few or no air bubbles.

Methods for producing glass articles from laminated glass tubing include introducing the glass tubing to a converter. The glass tubing includes a core layer under tensile stress, an outer clad layer under, and an inner clad layer. The methods include forming a feature the glass article at a working end of the laminated glass tubing and separating a glass article from the working end of the laminated glass tubing, which may expose the core layer under tensile stress at the working end of the glass tubing. The method further comprises remediating the exposed portion of the core layer by completely enclosing the core layer in a clad layer. Systems for re-cladding the exposed portion of the core layer as well as glass articles made using the systems and methods are also disclosed.

Methods for producing glass articles from laminated glass tubing include introducing the glass tubing to a converter. The glass tubing includes a core layer under tensile stress, an outer clad layer under, and an inner clad layer. The methods include forming a feature the glass article at a working end of the laminated glass tubing and separating a glass article from the working end of the laminated glass tubing, which may expose the core layer under tensile stress at the working end of the glass tubing. The method further comprises remediating the exposed portion of the core layer by completely enclosing the core layer in a clad layer. Systems for re-cladding the exposed portion of the core layer as well as glass articles made using the systems and methods are also disclosed.

In a fabricating method for a quartz vial having a body part for containing a substance, a bottom part closing a lower end of the body part, a cylindrical neck part disposed at an upper end of the body part, a cylindrical mouth part disposed above the neck part and having an outer diameter larger than that of the neck part, and a tapered portion connecting the mouth part and the neck part to each other, outer peripheral surfaces of the tapered portion and the neck part are formed by shaving, and the body part that is separately fabricated is welded to the neck part. Thus, quartz vials having a predetermined shape can be mass-fabricated.

In a fabricating method for a quartz vial having a body part for containing a substance, a bottom part closing a lower end of the body part, a cylindrical neck part disposed at an upper end of the body part, a cylindrical mouth part disposed above the neck part and having an outer diameter larger than that of the neck part, and a tapered portion connecting the mouth part and the neck part to each other, outer peripheral surfaces of the tapered portion and the neck part are formed by shaving, and the body part that is separately fabricated is welded to the neck part. Thus, quartz vials having a predetermined shape can be mass-fabricated.

An apparatus and related process for producing a high-strength weld between two glass components. Chucks clamp and move respective first ends of the glass components toward each other inside an enclosure, where the second ends are heated, softened, and welded together in a weld zone. The enclosure has layers of stacked quartz glass bricks and allows the weld zone to cool slowly and avoid stress. A propane quartz melting torch directs a flame inside the enclosure and toward the second ends as the glass components move toward each other. The flame softens the second ends and creates substantially smooth polished surfaces in the weld zone having an increased hydroxide content. At least 80% of the weld zone has a hydroxide content greater than about 10 ppm average in a 10 μm depth from the surface and the tensile strength of the weld zone is above about 10 MPa.

An apparatus and related process for producing a high-strength weld between two glass components. Chucks clamp and move respective first ends of the glass components toward each other inside an enclosure, where the second ends are heated, softened, and welded together in a weld zone. The enclosure has layers of stacked quartz glass bricks and allows the weld zone to cool slowly and avoid stress. A propane quartz melting torch directs a flame inside the enclosure and toward the second ends as the glass components move toward each other. The flame softens the second ends and creates substantially smooth polished surfaces in the weld zone having an increased hydroxide content. At least 80% of the weld zone has a hydroxide content greater than about 10 ppm average in a 10 μm depth from the surface and the tensile strength of the weld zone is above about 10 MPa.