Sift-resistant dispensing closure
US5383582A · kind A · utility
52Cited by
15References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1994 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Mar 18, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/265
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A rotor-style sift-resistant dispensing closure of injection-molded thermoplastic having a base that provides a resilient seal on its dispensing hole and a rotor carried on the base in a position that compresses the seal for sealing effectiveness. The rotor is accurately maintained in a flat configuration by the base which retains the rotor both at its center and at its periphery and which stabilizes the rotor against distortion with upstanding supporting ribs situated between the center and periphery of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.