| 摘要 |
A heating element for a plastic film laminator has a cylindrical base member. A heating layer of conductive resin such as conductive silicone is molded to the base member. An outer layer of dielectric material may cover the heating layer. Resistive electrical contacts are connected to the heating layer. An electrical power supply is connectable to the contacts. The resistive contacts create a voltage drop within the contact along the axis of current flow. This lowers the current density at the interfaces of the contacts and heating layer to prevent localized overheating of the conductive resin.
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