Abstract: The weft thread storage device contains a winding drum arranged eccentrically to a stationary axis. The winding drum is provided with a plurality of thread support rods on the side thereof which is opposite to the eccentric portion thereof. The thread support rods rotate conjointly with the winding drum. The winding reel composed of the winding drum and thread support rods carries the weft thread coils or wrappings. An end face of this winding reel supports a thread guide disk mounted on an intermediate support disk. The thread guide disk is constructed such that the outer circumference thereof everywhere exhibits the same distance from a balloon-breaker housing. In one upper portion of the thread storage device this distance is defined by the upper portion of the winding drum.