Plastics container assembly
US4886181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1987 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/8322
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastics container assembly has a tubular wall 1 and a bottom end cap 2 fitted thereto to form a base. The wall 1 has an internal flexible and integral peripheral sealing flange 7 which is displaced by abutment with a closure wall 2a during fitting of the end cap to the side wall so that an annular rib 8 on the cap snap engages with an annular groove 5 in the side wall. A flange 12 on the bottom cap overlies the bottom end of the side wall 3 and may be permanently bonded thereto by welding. The flange 7 presents a smoothly curved concave profile 13 and provides a smooth transition 14 with the closure wall 2a. Fluid seals are provided by abutting surfaces between the rib 8 and groove 5, between the flange 12 and bottom of the wall 1 and between the sealing flange 7 and wall 2a. In a modification the annular rib is located on the wall 1 to snap engage with an annular groove in the cap 2 and the sealing flange 7 is omitted so that the smoothly curved concave profile is formed by an upward extension wall of the bottom cap 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.