Bag blocks
US6793613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/986
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A block of bags for a product filling process includes a plurality of bags stacked in overlying relationship. Each bag of the block has a top edge, a bag mouth and opposite first and second side edges. First and second weakened segments extend from adjacent edge points on respective opposite lateral edges of the bag. A central line of perforations extends between inner ends of the first and second weakened segments. A tear-off region is defined between the central line of perforations and the top edge. During automatic filling of the bag, the weakened segments are torn to form an open bag mouth, and the central line of perforations is torn after filling to separate the bag from the block. The weakened segments can be cuts and are spaced from the lateral edges of the bag to define frangible bridges at the lateral edges, wherein the frangible bridges are broken during opening of each bag. The invention also provides a bag filling platform which holds bag lip portions at a depressed elevation so that lip portions that remain on the platform after bags are separated do not interfere with the filling of subsequent bags.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.