Method and apparatus for stretch wrapping the top and sides of a load
US5463842A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1991 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Aug 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1944
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for wrapping the top and sides of a load. A web dispenser dispenses and stretches web on the direction in which it is dispensed. The load is rotated relative to the web dispenser as web is wrapped onto the load. The web dispenser is positioned in an orientation generally parallel to the sides of the load for wrapping the sides of the load, and is changed to an orientation generally parallel to the top of the load for covering the top of the load. A web supply may change orientation along with the web dispenser or may be fixed relative to the web dispenser in an orientation generally parallel to the sides of the load. When the web supply is fixed, an accumulator is provided for accumulating web. The accumulator dispenses web when the web dispenser is changing orientation and when the web dispenser is in the orientation generally parallel to the top of the load. The web supply does not provide web when the web dispenser is changing orientation or when the web dispenser is in the orientation generally parallel to the top of the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.