Biaxial stretch wrapping
US5161349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1990 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Oct 2, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B11/045
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Stretch wrapping packaging material on a load includes introducing stretch wrap packaging material onto V shaped tips of projecting portions of a first grooved roller so that the packaging material spans the nonprojecting portions of the first grooved roller. The web of packaging material and the first grooved roller are transported in the direction generally parallel to the grooves. The web of packaging material spanning the nonprojecting portions of the first grooved roller is impinged with V shaped tips of projecting portions of a second grooved roller. The tips of the projecting portions of the second grooved roller are transported at a speed which is less than the speed of the tips of the projecting portions of the first grooved roller. The tips of the projecting portions of the second grooved roller moves at a speed which stretches the web between the first and second grooved surfaces in a direction transverse to the direction in which it is transported and minimizes any stretching of the web in the direction in which the web is transported. The web is stretched between the projecting portions of the first and second grooved rollers in a direction transverse to the direction …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.