| 摘要 |
A multicolored drinking cup is formed by blow molding a multicolored parison. The parison is formed by feeding the outputs of a plurality of controllable rate extruders into an extruding head and varying the flow rates of the extruders in a controlled manner under computer control to produce a parison in which the colors vary in width along the height. The parison is then blow molded to form the container. |
