| 摘要 |
<p>A painting roller comprising a hollow roller cylinder (11) mounted to be axially rotatable about a rod (14), the rod supporting a piston (30) urged towards one end of the cylinder by a spring (33), and a discharge bar (16) positioned externally of the cylinder adjacent the periphery of the cylinder, the discharge bar being in fluid communication with the rod through a discharge control valve whereby in use the movement of the cylinder relative to the rod causes paint to be drawn into the cylinder and forces the piston towards the other end of the cylinder so that opening of the control valve forces the piston to said one end of the cylinder and causes paint to be discharged along the rod and out of the discharge bar onto the periphery of the roller.</p> |
