METHOD FOR MAKING A GOBLET FOR WATER, WINE, SPARKLING DRINKS OR THE LIKE AND THE GOBLET MADE THEREBY

Abstract: A metal goblet for water, wine, sparkling drinks or the like of the type comprising a metal bowl (10) welded to the upper end of a stem, is characterized by the fact that the upper end of the stem (2) has an outer annular abutment portion (3) and an inner contact portion (5) spaced radially inwardly of the outer abutment portion (3), and by the fact that before welding is effected the inner contact portion (5) projects above the outer abutment portion and is fused to the bowl upon formation of the welded connection.

Description: "A goblet for water, wine, sparkling drinks or the like" The present invention relates to a goblet for water, wine, sparkling drinks or the like. In the production of metal goblets considerable difficulties are currently encountered in making the connection between the cup or bowl and the column or stem, in that this connection is usually made by welding and then the welding zone requires subsequent surface finishing operations in order not to detract from the aesthetic appearance of the goblet so obtained. Such operations are very difficult, however, particularly when stainless steel is used, in that the welding operation itself usually creates localised chromatic variations in the metal which are not acceptable in a product of high quality. Another disadvantage, attributable to the manufacturing process used in the known art, is constituted by the fact that the welding techniques used involve making a weld with the addition of material which is fused to the workpieces, but with this technique it is difficult to be able to maintain the original form of the goblet entirely unchanged in that the weld metal added during welding creates thickness variations which can distort the original dimensions. The present invention seeks to eliminate the above noted disadvantages by providing a metal goblet the structure of which makes it possible to obtain a connection between the stem and bowl without the need for added metal during welding and without having to undertake any delicate surface finishing operations after welding. According to the present invention, there is provided a metal goblet for water, wine, sparkling drinks or the like comprising a metal bowl welded to the upper end of a stem characterised by the fact that the stem has an outer annular abutment portion and an inner contact portion spaced radially inwardly of the outer abutment portion, and in that before welding is effected the inner contact portion projects above the outer abutment portion and is fused to the bowl upon formation of the welded connection, this welded connection being obscured from view by the outer abutment portion. A particular advantage of the invention is that a metal goblet can be made in which the junction between the stem and the bowl can be obtained with extreme dimensional precision without the welded connection of these two elements being visible. Another advantage of the present invention is that it provides a metal goblet structure which, by its particular constructional characteristics, is able to give the widest guarantees of reliability, as well as being very simple to produce. It is to be emphasised that the metal goblet structure of the present invention is suitable for all drinks such as water, wine, sparkling drinks or the like, and is easily obtainable starting from elements commonly available in commerce and, moreover, is competitive from a purely economic point of view. In another aspect, the present invention provides a method of making a metal goblet for water, wine, sparkling drinks or the like characterised by the fact that it comprises the steps of forming an end face of the stem with an outer annular abutment portion and an annular contact portion radially inward of the abutment portion and projecting axially from the general place defined by the abutment portion, positioning the stem with the contact portion in contact with the lower part of a goblet bowl with the stem and the bowl in the desired relative position to form the goblet, and locally heating the annular contact region between the bowl and the contact portion whereby to make a fused connection between this portion and the bowl which, upon completion is obscured by the said radially outer abutment portion. One embodiment of the present invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: F#igured 1 schematically represents a goblet formed as an embodiment of the present invention with its component elements shown separated before welding; Figure 2 is an axial section on a greatly enlarged scale, showing the upper end of the stem; and Figure 3 illustrates, in side view, the goblet obtained by the welded union of the component elements shown in Figures 1 and 2. Referring now to the drawings, the metal goblet shown comprises a bowl 10 and a stem 2, which can have any conformation and dimensions considered suitable. At its upper end, the stem 2 has an outer circular abutment ring 3 terminating at the top with an annular face 4 which is substantially flat in a horizontal plane when the stem 2 is upright. Within the circular outer ring 3 there is provided a circular inner ring 5 which has an edge portion 6 tapering upwardly in such a way as to have, in transverse section, a substantially triangular or saw tooth shape. The circular inner ring 5 is separated from the circular outer ring 3 by an annular groove indicated with the reference numeral 7, and radially within the circular inner ring 5 there is a hollow cavity 8, or shallow recess preferably (as shown, but not necessarily) of substantially conical conformation. The bowl 1 to be fitted to the stem 2 can have any shape and conformation considered suitable and is intended to be connected to the said stem at a median portion of its lower part. The connection between bowl 10 and stem 2 is made by means of resistance welding by superimposing the stem 2 and the bowl 10 over one another such that, initially, the contact between the two is made solely by the tapered end 6 of the inner ring 5 at the end of the stem which projects with respect to the flat plane defined by the outer ring 3. During the resistance welding process the projecting part of the inner ring 5 fuses and tends to penetrate at least partially into the contacting region of the bowl 10 where a concentration of the welding current takes place, which creates a localised fusion such as to allow both the partial penetration of the inner ring 5 into the bowl 10 and the fusion of the bowl 10 which continues until the two components approach one another sufficiently closely for the bowl 10 to come to rest against the flat face 4 of the outer ring 3. The two components are thus fused into a single piece by the welded union of the stem 2 and the bowl 10 without having to provide any added welding metal, and without the welding zone being visible from the outside in that the welding takes place predominantly in the zone of, and immediately surrounding, the inner ring 5 which, when the welding is completed remains obscured from view thanks to the presence of the outer ring 3 against which the cup rests. By the process of the present invention a perfect union of the component elements is obtained in a rapid and certain manner thanks to the specific structural conformation of the upper connection end of the stem and, in particular, by the presence of the inner circular rings which, having a tapering cross section at its upper end, facilitates the localised fusion of material thus contributing to a secure welded union of the two elements. Although the present invention has been described in particular in relation to stainless steel, any other metal, or even plastics, could be used, in which latter case, instead of electrical resistance welding, the welding could be effected by ultrasonics or by high speed friction achieved by relative angular oscillation of the two components.

Claims: Claims: 1. A metal goblet for water, wine, sparkling drinks or the like comprising a metal bowl (10) welded to the upper end of a stem (2), characterised by the fact that the upper end of the stem (2) has an outer annular abutment portion (3) and an inner contact portion (5) spaced radially inwardly of the outer abutment portion (3), and in that before welding is effected the inner contact portion (3) projects above the outer abutment portion and is fused to the bowl upon formation of the welded connection this welded connection being obscured from view by the outer abutment portion (3). 2. A metal goblet for water, wine, sparkling drinks or the like, according to Claim 1, characterised by the fact that the said outer annular abutment portion (3) has a substantially flat circular face (4). 3. A metal goblet for water, wine, sparkling drinks or the like, according to Claim 1 or Claim 2, characterised by the fact that the said inner contact portion (5) has, in transverse section, a substantially trapezoidal shape. 4. A metal goblet for water, wine, sparkling drinks or the like, according to any preceding Claim, characterised by the fact that it includes an annular groove (7) between the outer abutment portion (3) and the inner contact portion (5). 5. A metal goblet structure for water, wine, sparkling drinks or the like, according to any preceding Claim, characterised by the fact that the upper end of the stem is formed with a cavity radially inwardly of the said inner contact portion (5). 6. A metal goblet for water, wine,sparkling drinks and the like, according to any preceding Claim, characterised by the fact that upon completion of the resistance welding the bowl (10) rests in contact with the upper face (4) of the outer abutment portion (3). 7. A method of making a metal goblet for water, wine, sparkling drinks or the like characterised by the fact that it comprises the steps of forming an end face of the stem with an outer annular abutment portion (3) and an annular contact portion (5) radially inward of the abutment portion (3) and projecting axially from the general plane defined by the abutment portion (3), positioning the stem with the contact portion (5) in contact with the lower part of a goblet bowl (10) with the stem (2) and the bowl (10) in the desired relative position to form the goblet, and locally heating the annular contact region between the bowl (10) and the contact portion (5) whereby to make a fused connection between this-portion (5) and the bowl (10) which, upon completion is obscured by the said radially outer abutment portion. 8. A method according to Claim 7, characterised by the fact that the bowl (10) and stem (2) are made of metal and the said local heating is effected by electrical resistance welding. 9. A method according to Claim 7, characterised in that the local heating is effected by ultrasonic welding techniques.

Inventors: PIAZZA, FERDINANDO
Applicants: FRATELLI PIAZZA S.A.S.
Application year: 1985
Main classification: B23K33
IPC codes: A47G19, B29C65, B23K33