| 摘要 |
<p>The first stage in blow forming synthetic containers uses an inwardly domed bottom (10) which is moulded as essentially a frustrum of a straight cone (1a,1b). Also claimed is the manufacture of hot washable plastic bottles, esp. of PET, which have a bottom which can be inspected, by first blow forming the bottom (10) as a truncated cone (1). When removed from the mould or after shrinking the bottom has, in section, a curvature (10',10",10w) whose point of inflection (10w) is axially higher then the ring (10r) along which the bottom support ring is attached to the bottle.</p> |
