PURPOSE:To surely supply a highly viscous paint into the main body of a roller by supporting one end of a squeeze shaft and a roller main body detaining shaft with a supporting rod, attaching a cap for closing to the free end and mounting externally a core to the shaft. CONSTITUTION:With respect to a paint force-feed system coating roller suitable for coating a highly viscous paint, one end of a squeeze shaft 1 is connected to a supporting rod 7 which is simultaneously used as a paint feed tube to communicate with a paint feed passage 5, a roller main body detaining rotor 11 is supported freely rotatable by the supporting rod 7 and a cap 13 is attached to the free end to close the passage 5. Besides, a bottomed cylindrical core 19 of the roller main body 14 provided with paint discharge holes 15 is externally mounted to the squeeze shaft 1, the opening end of the core 19 is concentrically screwed into the rotor 11, the bottomed end part of the core 19 is supported freely rotatable by the outer peripheral surface of the cap 13 and the core is smoothly rotated.
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