Abstract:
The bottle, particularly suitable for carbonated beverages, is of the type with a substantially cylindrical shape and is provided circumferentially with at least one deep annular groove with a quadrangular cross section.

Description:
This is a continuation application of application Ser. No. 07/669,551 filed on Mar. 14, 1991, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to a plastic bottle particularly for containing beverages. 
     The bottle is particularly suitable for the containment of carbonated beverages such as mineral waters, orangeades or other beverages to which carbon dioxide is added. 
     It is known that plastic bottles suitable for the containment of carbonated beverages, of the kind currently used in the 1.5- or 2-liter size, must have a body which is more resistant than the others. 
     The greater resistance of these bottles, which are manufactured with the method of blow molding, is usually obtained by increasing the thickness of their body. 
     This naturally increases the amount of raw material used and consequently the cost of the bottles. 
     In order to solve this disadvantage, bottles which are circumferentially provided with slight annular reinforcement grooves with a triangular cross section have been made commercially available, but the practical results have not been up to the expectations, since due to the filling and to the consequent tensions to which the bottle is subjected its outer surface tends to stretch longitudinally, consequently stretching the annular grooves, which achieve no effect. 
     The surface of bottles for beverages is furthermore generally completely smooth and also has a considerable diameter (approximately 85 mm), so that gripping with a user&#39;s hands is often troublesome. 
     SUMMARY OF THE INVENTION 
     The aim of the present invention is to provide a plastic bottle of the type commonly used for the containment of carbonated beverages in the 1.5- or 2-liter size which solves the disadvantages described above in the known art. 
     A consequent primary object is to provide a bottle which, despite being suitable for the containment of carbonated beverages, is equal in cost to those suitable for non-carbonated beverages. 
     Not least, the object is to provide a bottle which is not more difficult to manufacture than currently commercially available bottles. 
     This aim, these objects and others which will become apparent hereinafter are achieved by a plastic bottle of the type with a substantially cylindrical shape, characterized in that it circumferentially comprises at least one deep annular groove with a quadrangular cross section. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further characteristics and advantages of the invention will become apparent from the detailed description of an embodiment thereof, illustrated only by way of nonlimitative example in the accompanying drawings, wherein: 
     FIG. 1 is a perspective view of the bottle according to the invention; 
     FIG. 2 is an enlarged perspective view of a detail of the bottle of FIG. 1. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to the above figures, the bottle is indicated by the reference numeral 1 and comprises a cylindrical body 2, a shaped bottom 3 at a first end of the body 2, and, at a second end of the body 2, a neck 4 with a thread for a closure. 
     The bottle 1 is made of plastic material with conventional methods of blow molding, in particular with the material commonly indicated by the acronym PET. 
     According to the invention, the bottle 1 is circumferentially provided, in an upper region of the body 2 (i.e. in the upper half of the body 2 closest to the neck 4), with a deep annular groove 5 having a quadrangular cross section which is in particular a cross section in the shade of an equilateral trapezoid. 
     The groove 5 therefore comprises two annular bands 6 and 7 with a conical shape which are connected by an inner cylindrical band 8. 
     Since the bottle 1 is manufactured by blow molding, as mentioned previously, the amount of material which deposits on every part of the parison in its initial shape is the same, and since the band 8 of the finished bottle has a considerably smaller diameter than the body 2, after blowing the thickness at the band 8 is greater than that of the other parts of the body, so that it is considerably resistant and the groove 5 is not subjected to stretchings. 
     The inner band 8 in practice has a function which is comparable to that of the reinforcement hoops of barrels. 
     It should also be pointed out, considering the fact that the bottle will be preferably manufactured in the currently commercially used 1.5- and 2-liter sizes, that the local diameter reduction caused by the presence of the groove 5, provided at a grip area of the upper region of the body 2, allows a better grip with a user&#39;s hands with respect to current bottles. 
     Finally, the fact that in practice the amount of material used is equal or slightly greater than that used for bottles for non-carbonated beverages provides a further advantage of the present invention. 
     It has thus been observed in practice that the bottle according to the invention has achieved the intended aim and objects. 
     The invention thus conceived is susceptible to numerous modifications and variations, all of which are within the scope of the inventive concept. 
     All the details may furthermore be replaced with other technically equivalent elements. 
     In practice, the materials employed, so long as compatible with the contingent use, may be any according to the requirements.