Method of making a pressure operated container for dispensing viscous products
US3981119A · kind A · utility
9Cited by
2References
6Claims
0Family size
Inventor
Key dates
| Filing date | Sep 9, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Sep 9, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/64
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention contemplates a method of making a pressurized container for viscous foods or other viscous products in which the body of the piston has a substantially smaller diameter than the diameter of the container. The outer periphery of the piston is provided with a resilient flange member that maintains a light sealing pressure on the interior surfaces of the container, allowing the piston to move smoothly upwardly within the container. The inventive method provides enhanced assurance against product leakage and against propellant-contamination of product, prior to selective product discharge as desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.