| 摘要 |
PURPOSE:To obtain the marking method easy for change of display as well as visually dis criminative by using PVC for container film and gas laser light for laser light in blister packaging. CONSTITUTION:In a blister packaging line, a laser beam marking device 10 has a laser oscillator 11 and irradiating part 12 of laser beam, marking is executed by aligning/scanning a beaming spot to a marking shape. By using PVC for container film F, irradiation of laser beam makes the irradiated part to sublimate or evaporate to form recessed part and discolor the surface. CO2 laser beam having the wave length suitable for film heating is used for laser beam. Further, because CO2 laser beam can heat film by a wave length of 10mum, the marking, which is easy for changing display such as commodity description, lot number, etc., and visually dis criminative, is made possible. |
