| 摘要 |
PURPOSE: To enable a carton to be opened simply and hygienically by forming the opening part of the carton in a curve. CONSTITUTION: The opening part 1 of a carton is formed in curves 2, 3 as against a prior art or straight line. Auxiliary materials 4, 5 formed of different materials are provided for the part held between fingers and pulled apart in unsealing. As a result, the carton can be opened simply and smoothly. The opening part 1 is secure from impairment and can be kept in a clean state and the use is also reassuring from the viewpoint of hygiene. |
