PURPOSE: To easily execute the treatment as well as to lighten a spacing device for the longitudinal threads. ;CONSTITUTION: The spacing device 47 includes a plurality of segments, these segments extend toward a part of circumference of a pouring body 28. Each segment is hinge connected with other. Thus the segments form a ring chain type. A slider 48 connected to the supporting stand, in operation of the apparatus, i.e., in revolution of the pouring body 48, always engages each segment. That is, the slider 48 moves the segment forward by abutting always to the back of the related segment, then each segment is moved discontinuously in the axial direction as much as a pitch of spiral of the elastomeric material at every one revolution of the pouring body 28.;COPYRIGHT: (C)1993,JPO
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