Vertical-type bag packaging method and apparatus
US8245485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Sep 21, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7128
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A vertical bag packaging machine has a steam nozzle that is inserted into a bag to inject steam thereinto after an article to be packaged has been filled into the bag, thereby replacing the air in the bag with the steam to effect deaeration. After the steam-replacement deaeration, a seal portion to be ultrasonically sealed is preheated by a preheating device, thereby making the temperature of the seal portion uniform throughout it. The preheating temperature is not lower than a temperature of a highest temperature region of said seal portion before it is preheated and below a melting temperature of a material constituting an inner side of said bag Thereafter, the seal portion is ultrasonically sealed by an ultrasonic sealing device. Thus, reliable and stable ultrasonic sealing can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.