Stretch wrapping with tension control
US5311725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Jul 30, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B2011/002
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A stretch wrap packaging machine includes a support frame and a rotatable frame rotatably mounted on the support frame. A dispenser is mounted on the rotatable frame to follow an orbital path. The dispenser has a web tensioning system which is selectably operable in a plurality of states. At least one actuation ring is moveably mounted on the support frame for cooperation with the tensioning system and selectively rendering the tensioning system operable in each of the plurality of states of operation throughout the orbital path. An activator moves the actuation ring to cooperate with the tensioning system. The tensioning system may include prestretch rollers connected by an engageable clutch. The tensioning system may also include at least one power assisted roller which is connected by a clutch to a power source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.