公开(公告)号：US3801398A

公开(公告)日：1974-04-02

申请号：US3801398D

申请日：1971-10-13

Applicant: RUBBERFAB VRADERSTEIN NV

Inventor： PIERSMA L ,  SIEMES A

IPC: B29C47/00 ,  B29C47/92 ,  B29C65/00 ,  B29C69/00 ,  B29D23/24 ,  B60C5/04 ,  B29H15/00

CPC classification number: B29D23/24 ,  B29C47/0023 ,  B29C47/0026 ,  B29C47/0066 ,  B29C47/92 ,  B29C65/00 ,  B29C66/1142 ,  B29C66/532 ,  B29C66/71 ,  B29C66/8351 ,  B29C2793/0027 ,  B29C2947/92638 ,  B60C5/04 ,  Y10T29/49829 ,  B29K2021/00 ,  B29K2007/00

Abstract: This invention relates to tire inner tubes, to a mechanised and simplified method, and to an apparatus for manufacturing tire inner tubes with air valves in which a conveyor carries tubing portions of an extruded tubing of rubber or the like along apparatuses for forming holes in the tubing portions and for positioning and securing air valves over the holes, the speed and relative movements of the conveyor and apparatuses being adjusted and controlled such that the apparatuses execute their operations within the length of time that expires between each passage of a length of inner tube, and in which the tubing portions are cut off from said tubing before or after the holes have been formed and the air valves have been secured.