FIELD: tyre industry; casemaking drums. SUBSTANCE: drum for assembling circular blanks of pneumatic tyre casings has movable rod mounted coaxially with drive shaft and pin secured on housing of power cylinder for driving the sectors square to longitudinal axis of drive shaft. Relatively intersecting axial slot and longitudinal slot in which pin is fitted are made on one end of drive shaft. Movable rod is fitted in axial slots with regulator mounted on outer end of rod. Inner end of rod is connected with pin. Ring cylinder housing has shell with radial slots and levers mounted in slots. Drum working diameter regulator screw is installed on movable rod and is furnished with shaped nut. EFFECT: facilitated assembling of tyre casings. 3 cl, 4 dwg
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