| 摘要 |
Method for applying protective sleeves to combustion-type photoflash lamps wherein there is placed proximate a mold means a strip of organic plastic having a thickness of from about 0.3 to 0.8mm, a tough-plastic characteristic at a temperature of from about 160 DEG to 200 DEG C, a tough-elastic characteristic at a temperature of from about 90 DEG to 125 DEG C, and a freezing temperature of from about 65 DEG to 70 DEG C. The strip is heated to the tough-plastic temperature and drawn into the mold means to form a series of plastic cups which have a dimension slightly smaller than the lamps to be sleeved. When the temperature of the formed cups is in the tough-elastic range, they are expanded to be slightly larger than the lamps to be sleeved, and are then frozen. The lamps are then placed into the cups which are then heated to cause them to shrink-fit onto the lamps. The sleeved lamps are then severed from the residual plastic strip. |
