公开(公告)号：US10994507B2

公开(公告)日：2021-05-04

申请号：US15738071

申请日：2015-06-19

申请人： BORRACHAS VIPAL S.A.

发明人： Mauri Roque Ferreto ,  Eleno Rogrigues Vieira ,  Ismael Borges Vieira ,  Leandro Gustavo Guedes ,  Paulo Rampon

IPC分类号： B29D30/54 ,  B29C35/18

摘要： This invention provides an envelope configuration for retreading tires using a cold-retreading process. Envelopes formed by two parts are known in the prior art. However, the known sealing means between parts are not satisfactory, either due to sealing problems or due to decreasing the envelope useful life. In order to overcome these limitations, this invention provides an envelope (20) comprised of two parts (22, 24), in which an end region (224a) of a flap (224) of the first part (22) is covered by an end region (244a) of a flap (244) of the second part (24), or vice-versa, in order to form an overlapping joint, in which a free end of the flap (224) of the first part (22) has at least one differentiated cross section (224b) whose thickness is greater than that of the flap (224) of the first part (22), and in which the overlapping joint is covered by an elastic ring (26) that is wide enough to cover said differentiated cross section (224b).