Peel-top container assembly system
US4122790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1977 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | May 12, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B7/168
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for forming and mounting end closures for peel-top containers, each closure including a peelable sealing membrane, with a folded pull tab, and a separate plastic overcap. The individual sealing membranes are cut from a continuous web and deposited directly on the open ends of cans or containers being fed in a continuing line. Each membrane is retained in properly oriented association with the corresponding container, by adhesive tacking or through a partial vacuum generated within the container, until such time as the container supported membrane is engaged by a chuck to effect a positive sealing of the membrane to the container. After a sealing of the membrane to the container, the container proceeds through a cycle wherein the tab on the membrane is laterally bent, the overcap is applied, and the container with completed end closure is discharged. Embossing of each membrane is normally selectively done so as to occur only over the area thereof inward of the peripheral portion which engages the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.