Machine for sealing cups with film
US4989393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Dec 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/8735
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A web of heat-sealable film is advanced in overlying relation with filled cups to a sealing station where both the web and the cups dwell momentarily. During the dwell period, sealing heads advance downwardly and seal the web to the upper end portions of the cups. The heads are advanced downwardly with a two-step stroke, the heads first advancing in unision with a carriage and then being individually advanced by individual pneumatic actuators which are mounted on the carriage. After being sealed, the cups are indexed to a cutting station where annular knives are advanced downwardly to cut through the web and leave each cup with a circular sealing membrane. The knives are advanced with a two-step stroke similar to that of the sealing head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.