| 摘要 |
PURPOSE:To provide a sponge roller free from a defect such as a parting line or a projection on the external surface thereof by venting gas via a mandrel having a vent hole. CONSTITUTION:A cylindrical type sponge section 3 is coaxially supported on a mandrel 2 having vent holes 4. The external surface 7 of the section 3 is preferably made circumferential with a constant radius and in continuous and uniform foamed state. Also, the external surface 7 of the section 3 may be a skin layer 8. |
