Abstract: “An elongate sealing jaw body for mounting a jaw cover. The sealing jaw body includes a base for abutting with a press; and a stem including a proximal region adjacent the base, the stem extending from the proximal end to a distal end and including side walls between the proximal and distal ends, the stem being for mounting the jaw cover thereon. Moreover, the stem further includes heat insulators adjacent the side walls to inhibit heat transfer to the jaw cover.”