Plastic bottle with reinforced concave bottom
US4989738A · kind A · utility
15Cited by
30References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 13, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Oct 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2077/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A blow molded plastic bottle has a reinforced plastic bottom with a concave central portion and a bottom rim portion. A solid depending rib, formed at the pinch off seam, extends across the concave portion, and depending hollow ribs, formed in the concave portion at ninety degress to the solid rib, extend radially to the bottom rim portion. The hollow rims effectively reduce the depth of the bottom rim intermediate the seam junctions to reduce bulging of the concave base thereby preventing instability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.