Abrégé

Method and station (6) for the skiving of the equatorial surface (4) of the casing (5) of a pneumatic tyre (2) during a retreading process of the same pneumatic tyre (2); the old worn tread is removed from the pneumatic tyre (2) in order to expose the equatorial surface (4) of the casing (5) of the pneumatic tyre (2); the presence of any damage on the equatorial surface (4) of the casing (5) is identified by capturing a three-dimensional profile of the equatorial surface (4) of the casing (5) by means of a profilometer (12) and by analyzing the same three-dimensional profile; and the equatorial surface (4) of the casing (5) is skived where there is damage resulting from the formation of craters (7) on the equatorial surface (4).

Classes IPC  ?

• B29D 30/54 - Rechapage
• G01M 17/02 - Pneumatiques

Abrégé

A method of manufacturing an agricultural tyre (1) with deep cross-lugs (6), comprising the steps of: (a) proving a tyre case (2) and tread belts (3); (b) applying rubber blocks (206) onto tread belts (3), each of such rubber blocks (206) being arranged to make a respective lug (6) of the final tread (4); (c) winding a rubber ribbon (200) above said rubber blocks (206) so as to completely enclose said rubber blocks (206); (d) curing the rubber blocks (206) together with the wound ribbon (200) in a curing mould (105) negatively reproducing a desired pattern of the tread (4).

Classes IPC  ?

• B29D 30/52 - Chapes non vulcanisées, p. ex. sur des pneumatiques usagésRechapage
• B29D 30/58 - Application de bandes de chapes en caoutchouc, c.-à-d. application de bandes de rechapage non vulcanisées
• B29D 30/66 - Moulage des chapes sur les carcasses de pneumatiques, p. ex. chapes antidérapantes avec des pointes

Abrégé

The present invention relates to a folding arm (10) for a sidewall band of a tyre comprising a rod (11) that has a main portion (15) and a head portion (16) fitted together at an interface section (17). The folding arm further comprises a folding assembly (20) comprising a support (21) and more than one folding roller (22,23) idle mounted on said support, wherein the support (21) has a chevron-like shape and the assembly being connected to an head end (14) of said rod (11). The section area at the head end (14) is lower or equal to 90 % of the area of the interface section (17). The invention also relates to an arm mechanism comprising a plurality of said folding arms and to a drum apparatus for building tyres, comprising one or more of said arms mechanisms.

Classes IPC  ?

• B29D 30/32 - Pose des tringles ou des noyauxPliage des couches textiles autour des tringles ou des noyaux de tringle

Produits et services

Tires.

Abrégé

A tire building method comprising: feeding an elastomer strip in a feed direction towards a building drum by means of a first and a second feed conveyor arranged in succession; cyclically determining the transverse position of both sides of the elastomer strip in a centring direction perpendicular to the feed direction; calculating an average head out of center on a head portion of the elastomer strip; and moving the second feed conveyor transversely in the centring direction by an amount equal to the average head out of center, before winding the elastomer strip around the building drum.

Classes IPC  ?

• B32B 41/00 - Dispositions pour le contrôle ou la commande des procédés de stratificationDispositions de sécurité
• B29D 30/30 - Mise en place des couchesGuidage ou étirage des couches en cours d'application
• B29D 30/24 - Tambours
• B29D 30/00 - Fabrication de pneumatiques, de bandages pleins ou de leurs parties constitutives
• B29D 30/44 - Étirage ou traitement des couches avant application sur le tambour
• B29D 30/70 - Couches de protection annulaires

Produits et services

Tyres.

Produits et services

Tyres.

Produits et services

tyres.