| 摘要 |
<p>The parent patent described a plastic canister which is produced by blow moulding of an extruded hose to create a wall which is reinforced by outer wall elements. The outer wall elements consist of two truncated cones with the smaller bases facing each other have now been reinforced by adding to the smooth wall halfway along the height an outward semicircular groove, maintaining the same wall thickness. This not only makes the elements mechanically stronger, but it also facilitates their location in the blow mould.</p> |
