Case closed by a glass with an invisible joint or one that can be decorated and manufacturing methods

A sealed case comprising:

• a middle part having a shoulder having a given hue;
• a back cover delimiting a compartment;
• and
• a glass closing the compartment, the glass having an outer face and an inner face and comprising a transparent material resistant to temperatures above 500° C., wherein the glass is bonded or welded at joint zones at least partially covering the shoulder of the middle part,
• wherein the inner face of the glass includes an enamel deposition having a desired final thickness formed in the joint zones, wherein the enamel deposition is disposed to conceal the joint zones, and wherein the enamel deposition has the same hue as that of said shoulder of the middle part.

A method of manufacturing a sealed case including a middle part and a back cover delimiting a compartment closed by a glass made of a transparent material resistant to temperatures above 500° C., said glass having an outer face, an inner face, and an edge, wherein the method includes the steps of:

• (a) machining a hollow in the inner face of the glass close to the edge;
• (b) carrying out an enamel deposition having a slightly greater thickness than the desired final thickness in one or several steps to form an enamel front surface parallel to the inner surface of the glass;
• and
• (c) machining the enamel deposition to form an enamel front surface parallel to the inner face of the glass and an enamel side surface substantially perpendicular to the inner face of the glass.

A sealed case comprising:

• a middle part having a shoulder having a given hue,
• a back cover delimiting a compartment, and
• a glass closing the compartment, the glass having an outer face, an inner face and an external edge and comprising a transparent material resistant to temperatures above 500° C., wherein the glass is bonded or welded at joint zones at least partially covering the shoulder of the middle part,
• wherein the inner face of the glass includes an enamel deposition having a desired final thickness formed in the joint zones,
• the enamel deposition at least covering a strip at the external edge of the glass to guarantee sealing.

A sealed case comprising:

• a middle part having a shoulder having a given hue, wherein the middle part defines an outer edge of the case and the shoulder extends to the outer edge;
• a back cover delimiting a compartment;
• and
• a glass closing the compartment, the glass having an outer face and an inner face and comprising a transparent material resistant to temperatures above 500° C., wherein the glass is bonded or welded at joint zones at least partially covering the shoulder of the middle part,
• wherein the inner face of the glass includes an enamel deposition having a desired final thickness formed in the joint zones, and the enamel deposition is disposed to conceal the joint zones.

A sealed case comprising:

• a middle part having a shoulder having a given hue, wherein the middle part defines an outer edge of the case and the shoulder extends to the outer edge;
• a back cover delimiting a compartment;
• and
• a glass closing the compartment, the glass having an outer face and an inner face and comprising a transparent material resistant to temperatures above 500° C., wherein the glass is bonded or welded at joint zones at least partially covering the shoulder of the middle part,
• wherein the inner face of the glass includes an enamel deposition having a desired final thickness formed in the joint zones, wherein the enamel deposition is disposed to conceal the joint zones, and wherein the enamel deposition has the same hue as that of said shoulder of the middle part.