Drive device for a handheld heater unit

Abstract

Drive device for a handheld heater unit for welding plastic sealing webs and sheets, which is equipped with a heater device for heating the plastic sealing webs and sheets which are to be welded. The drive device has an elongate housing with a pressure-exerting and driving roller, by means of which the joining force can be applied in the vertical direction with respect to the plastic sealing webs and sheets. Furthermore, there is a coupling unit for joining the housing to the heater unit, in such a manner that the longitudinal axes of the housing and of the heater unit run substantially parallel to one another. In the housing there is a motor, which drives the pressure-exerting and driving roller, the height and/or distance of which with respect to the heater device is adjustable. The drive device together with a corresponding heater unit allows quicker, more accurate and therefore better-quality welding of the plastic sealing webs and sheets in manual welding applications, since the user only has to concentrate on applying the joining force. It is therefore possible to produce welds on plastic sealing webs and sheets on inclined and vertical walls, overhead, in U-shaped recesses or grooves and in corner regions.

Dependencies are inferred from the claim text.