Patent ID: 9333720
Filing Date: 2016-05-10
CPC Classification: B29D,B29K,Y10T

Claim Text:
1. A process for building a tire for a vehicle wheel comprising: assembling components of elastomeric material on a forming support, wherein at least one of said components of elastomeric material is manufactured by the steps of: i) dispensing a continuous elongated element of elastomeric material in a form of a strip; ii) applying, by way of an application roller, a portion of the continuous elongated element in a form of coils disposed at least partly superposed in a radial direction of the forming support, wound on the forming support so as to form said at least one component of elastomeric material of the tire; iii) exerting, by way of a central roller distinct from the application roller, a first pressure on a central region of one of the coils of the portion of the continuous elongated element after applying the continuous elongated element onto the forming support; and iv) exerting, by way of two side rollers each laterally offset toward opposite sides of the central roller, a second pressure only on side regions of said one of the coils of said portion of the continuous elongated element applied onto the forming support, the side regions being disposed on opposing sides of the central region, wherein step iv) follows step iii), wherein the continuous elongated element has a cross-sectional shape, measured perpendicular to a dispensing direction, comprising a width that is greater than a height, the height being measured perpendicular to an application surface of the forming support at a point where the portion is brought into contact with the application surface, and wherein the cross-sectional shape of the continuous elongated element is filled continuously with material, wherein the central roller and each of the side rollers are movable irrespective of each other along a direction orthogonal to the forming support at a point where the portion is brought into contact with each respective roller, wherein the central roller is carried by a central small arm hingedly connected to fixed arms about a first articulation axis, wherein the fixed arms are secured to a supporting frame, wherein an end of the central small arm, opposite to the central roller, is connected to the supporting frame by a first spring element, wherein the side rollers are carried by lateral small arms each laterally offset toward opposite sides of the central small arm, wherein the lateral small arms are hingedly connected to the fixed arms about the first articulation axis, and wherein an end of each of the lateral small arms, opposite to the respective side roller of each lateral small arm, is connected to the supporting frame by a respective second spring element.