| 摘要 |
<p>A method of deep-drawing articles, such as beakers, from heated thermoplastic sheet starts with an individual blank for each beaker; this is heated, but is not clamped around the edge for deep-drawing, until it has been heated. The advantages are that the prodn. rate from individual blanks is increased by preheating, while the advantages of individual deep-drawing are obtd.</p> |
