Bag-folding apparatus
US6113526A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1996 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Dec 19, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A folding apparatus of a bag-making machine includes a plurality of folding mechanisms each having a pair of nip rollers which receive a sheet or bag from an associated carrier structure, to thereby sequentially form transverse folds in each sheet or bag. In order to abate lamination-like adhesion of relatively thin, light gauge film materials to the belts and other surfaces of the folding apparatus, the belts and/or guide rollers of the apparatus are preferably provided with grooved sheet-contacting surfaces. The apparatus is additionally configured to abate wrinkling or buckling of a leading edge portion of each sheet or bag which can occur attendant to its reversal in direction of movement as it is directed between the nip rollers of each folding mechanism. High-speed operation is facilitated while avoiding improperly folded bags, or equipment jamming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.