HEAT-SEAL BAND WITH SEPARATE ELECTRICAL PATHS FOR VOLTAGE SENSING AND CURRENT LOAD TRANSMISSION

    公开(公告)号:EP4424500A2

    公开(公告)日:2024-09-04

    申请号:EP23219534.7

    申请日:2023-12-21

    IPC分类号: B29C65/22 B29C65/30 B29C65/00

    摘要: A heat-seal band is provided that incorporates voltage sensing wires, such as signal wires or conductors that are separate from current load carrying wires or conductors. This provides two discrete electrical paths: a voltage sensing path, and a current transmission path. The voltage signal conductor(s) in the voltage sensing path may be insulated to mitigate any non-desired influence by means of the voltage signal conductor's exposure to thermal or electrical influences from the current transmission path, including current transmission paths defined through conductive tabs that connect the heat-seal band to the current load conductors. The voltage signal conductor may connect at a node to the tab to band (tab/band) junction, which is defined at an intersection of the heat-seal band's conductive tab and the band that directs heat into a workpiece. Additional or a second set of voltage sensing conductors may be electrically connected to the heat-seal band at a location that is spaced from or in a subset of the first set of voltage sensing conductors. The second set of voltage sensing conductors may provide a secondary voltage sensing arrangement as a verification tool for evaluating temperature discrepancies between their locations and those of the first set, indicative of heating non-uniformity about the heat-seal band.