In-line package strapping system
US4989397A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 12, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B13/32
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An in-line strapping system which is particularly adaptable for strapping a compressible stack of sheet material includes a stack feeding mechanism which captures and holds the stack with its vertical side faces squared through the strapping cycle. A pair of vertically disposed compression belts captures the stack fed from an upstream squaring mechanism and feeds the stack into a strapping station to partially encircle the stack with a strap disposed in the path of movement. Only one lateral side of the stack is captured between the compression belt such that the stack is held in cantilevered fashion in the strapping station with the opposite lateral side unsupported. A rotary strap arm supports the partially wrapped strap and carries it around the unsupported rear portion of the stack to a sealing position overlapping the free end of the strap beneath the stack. A heat sealing apparatus seals the overlapping portions of the plastic strap, simultaneously cuts the strap to provide a new free end and clamps the new free end in a preliminary holding position. The strapped stack exits the system and the rotary strap arm continues in the same direction to an upper position and repositio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.