ITPD960112A1 - PROCEDURE FOR THE PRODUCTION OF CARAFE AND PRODUCT OBTAINED - Google Patents

Description

TITLE

PROCEDURE FOR THE PRODUCTION OF CARAFFES AND PRODUCT OBTAINED.

DESCRIPTION

The present patent relates to glass processing technology in particular in relation to the production of jugs.

Currently, jugs are produced with systems such as melting directly in the mold, blowing glass into molds, manual modeling with blowing by a craftsman of a mass of blown glass.

Manual blow molding is suitable for limited production of artistic specimens but not suitable for large-scale production.

The production by blowing glass into the mold involves the use of a greater mass of glass in order to be certain of having a minimum thickness of glass at any point. Furthermore, it is often necessary to grind the burrs due to the cracks between the parts of the mold.

The production by casting in the mold involves, identically to the method just mentioned, a grinding of the burrs from the mold, has minor differences in the thickness of the walls but if the casting is not carried out correctly or the glass mixture is not homogeneous the product obtained is fragile and therefore useless.

The subject of this patent is a process for the production of jugs and the jugs obtained with this process.

The procedure involves the use of a continuous tube of pyrex type glass which is cut into portions of adequate length and each portion is processed to take the shape of a carafe. The continuously produced tube, while still hot, is cut by any of the known methods such as thermal shock or mechanical tools. The single portion of the glass tube is sent to the subsequent processing stages.

The bottom of the carafe is made by heating one end of the tube portion until it is easily malleable. The soft end is molded and shaped until it is closed to assume the usual shape of the bottom. To create a regular and straight bottom with respect to the sides of the carafe, after c.

the softened end has been closed, the carafe is pressed onto a counterform whose shape reflects the shape of the bottom to be obtained (circular, hexagonal, or any other). The mouth of the carafe is also shaped by localized heating and shaping with the use of special tools or counterforms pressed against the edge of the carafe.

The jug handle can be obtained by applying a handle to it, for example obtained from a shaped glass tube with a smaller diameter whose end has been softened and fixed to the jug wall.

Alternatively, it is possible to make the handle by heating part of the walls and shaping them in such a way as to obtain swellings or grooves that allow a secure grip.

Both for the formation of the bottom and for the formation of the handle by shaping the walls, it is possible to blow air under pressure inside the jug in order to favor the expansion of the glass towards the outside. At the end of the various processes, the carafe is placed in a cooking oven in order to eliminate the various internal tensions in the glass generated by the various processes.

The jug thus obtained is particularly light since it does not require more glass to ensure a minimum thickness of the walls, it is free of burrs, it does not have the shadows in the glass mass that would occur with the melting in the mold, the surface is smoother and more uniform compared to traditional methods.

In the attached table is presented, by way of non-limiting example, a practical example of jug production.

From the continuous glass tube, still hot, a portion of suitable length is cut with a known method (Figure 1).

One of the ends of the tube portion is heated until it becomes soft and deformable (Figure 2).

The softened end is kept semi-fluid and deformed in order to reduce the opening until it closes (figure 3).

The closed end is shaped to its final shape by inserting it into a suitable shape (figure 4).

The open end is heated in one part and is dilated towards the outside to form the pouring spout (figure 5).

A portion of the lateral surface of the carafe, opposite the pouring spout, is heated (figure 6) to apply a previously formed glass handle (figure 7).

These are the schematic modalities sufficient for the skilled person to realize the invention, consequently, in concrete application there may be variations without prejudice to the substance of the innovative concept.

Therefore, with reference to the preceding description and to the attached table, the following claims are expressed.

Claims (7)

CLAIMS 1. Process for the production of jugs characterized by the fact of providing for the use of a glass tube (pyrex type) produced continuously which is cut while still hot, and where one end of the portion of the tube is heated until it is easily malleable and it is molded and shaped until it is closed to assume the usual shape of the bottom of a carafe. 2. Process for the production of jugs as per claim 1 characterized in that, after said still softened end has been closed, the jug is pressed onto a counterform whose shape reflects the shape of the bottom to be obtained. 3. Process for the production of jugs as per claim 1 or 2 characterized in that the spout of the jug is shaped by localized heating of part of the other end and subsequent shaping. 4. Process for the production of jugs as per claim 1 or 2 or 3 characterized in that the jug handle is obtained by applying a glass handle whose end has been softened and fixed to the jug wall. 5. Process for the production of jugs as per claim 1 or 2 or 3 characterized in that, by heating, parts of the walls are shaped in such a way as to have bulges or hollows which allow a secure grip. 6. Carafe characterized by the fact that it is obtained through a process as per claim 1 ο 2 ο 3 ο 4 ο 5. 7. Process for the production of jugs as per the preceding claims, characterized by the fact that its production and its marketing are understood to be protected by this patent, all as described and illustrated.