Sealing wire temperature control system
US6719863B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Oct 1, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/007
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for sealing sheets of plastic film together, comprising an apparatus having a first jaw, a second jaw, a sealing wire and a temperature sensor device. The first jaw and the second jaw are displaceable with respect to one another to a closed position, wherein the first jaw and the second jaw are opposed to one another with the sealing wire therebetween, such that sheets of plastic film positioned between the first and the second jaw in the closed position ate sealed together by the sealing wire when heated during a sealing cycle. The temperature sensor device is positioned to measure a temperature of the sealing wire during the sealing cycle. A power supply is connected to the sealing wire to supply an electric current thereto for heating the sealing wire. A controller is connected to the power supply and to the temperature sensor device for receiving temperature signals representative of the sealing wire temperature during the sealing cycle, the controller being inputted with a desired temperature signal from an operator, the controller automatically adjusting the value of the electric current from the power supply to the sealing wire as a function of the temperature signa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.