Stretch wrapping machine with variable frequency drive torque control
US11407536B2 · kind B2 · utility
0Cited by
12References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Sep 23, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method, apparatus and program product utilize a torque control algorithm constrained by a speed window to control the dispense rate of a packaging material dispenser when wrapping a non-cylindrical load with packaging material. In particular, a dispenser motor of the packaging material dispenser that is controlled by a VFD may be driven to maintain a substantially constant torque, while also constrained to operate within a speed window that is based at least in part on a rate of relative rotation between the packaging material dispenser and the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.