| 摘要 |
<p>PURPOSE: To retain a required strength even if the body is made thin and make the thickness of body thinner to economize the plastic material and prevent the external appearance of container from being spoiled and further, prevent it from being damaged during keeping and transportation owing to the smooth external face of the body. CONSTITUTION: A plastic container 1 is made by blow molding of a thermoplastic. Reinforcing ribs 4 are protrusively formed at the inner face of the body 2 and the external face of the body 2 is formed smooth.</p> |
