Self-sustaining container
US5858300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | May 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-sustaining container made of a saturated polyester resin, formed by biaxial stretch blow molding and comprising a mouth and cervical portion, a shoulder, a body and a bottom, wherein said bottom has a self-sustaining structure with a plurality of legs radially bulged around the center of the bottom and valley lines formed between the adjacent legs, and the following portions (A) to (E) are low stretched portions and at least portions (B) and (C) among the following portions (A) to (E) are crystallized portions: PA1 (A) center of the bottom PA1 (B) peripheral portion of the center of the bottom PA1 (C) portion of each valley line close to the center of the bottom PA1 (D) portion of each leg from the edge of the peripheral portion of the center of the bottom to a ground contact portion PA1 (E) portion between said portions (C) and (D).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.