| 摘要 |
PURPOSE: To ensure effective injection of a synthetic resin into a damaged portion or pockmark by disposing a vent hole so as to communicate with an interior space of a casing between a plunger and a discharge opening when the plunger is retracted to a rearward position. CONSTITUTION: A repairing device comprises a syringe 10, an applicator 11, and a sealing disk 12. By gripping flanges 16, 18, a plunger 17 is slowly retracted whereby a vacuum is created in an interior space of a casing 13 which communicates via a discharge nozzle 15 and a passage 27 in the applicator 11 with cracks present in the damaged portion 30. Due to this vacuum, any air and moisture which may have penetrated into the damaged portion 30 will be removed. An ambient air pressure acts to transport a synthetic resin onto the pockmark 30, the penetration into the same being promoted both by the pressure and capillary forces that are effective in the fine cracks. |
