Hot wire control apparatus and method
US7411162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jan 10, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/962
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Control system and apparatus for controlling current input to an electrical resistance element such as a seal wire. The system and apparatus of the present invention is a closed loop feedback modification to conventional systems, and takes advantage of the inherent expansion of the seal wire as it is heated. The feedback mechanism monitors both the actual current passing through the wire, and the length of the sealing wire, and adjusts the current applied to the wire, responsive to those monitored inputs. The usage of the sealing machine is also monitored and the application and amount of current flowing to the wire is varied based on this usage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.