Biased cross seal for packaging machine
US5016426A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/81419
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A biased seal for a form, fill and seal packaging machine includes an elongated seal bar which is attached to a support element via a plurality of connectors/retainers which are fixed to the seal bear, but movable with respect to the support element. A plurality of compression springs are positioned between the seal bar and the support element. The seal bar is movable on the connectors from a position wherein the seal bar is juxtapositioned against the sealing element and the compression springs are under compression and an extended position wherein the seal bar is displaced outward from the sealing elements by the bias in the compression springs. The support element is fixed to a slide assembly which is connected to an activator rod via an adjustment bracket. When used in combination with an opposing seal bar, the combination of the adjustable bracket assembly and the biased seal bar allows for variable amounts of pressure to be applied to films which are sealed together between the bias seal bar and the further seal bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.