Portable table top welder

A portable table top welder for welding plastic material webs, the portable table top welder comprising:

• a frame including a carrier housing including a carry handle and a support arm on which a welding device including a hot air nozzle is arranged;
• at least one transport roller including a rotatable transport roller axle and at least one contact pressure roller that is rotatably supported at the carrier housing,
• wherein the at least one transport roller and the at least one contact pressure roller are arranged downstream of the hot air nozzle and in direct contact with the plastic material webs during the welding,
• wherein the at least one contact pressure roller is arranged above the at least one transport roller,
• wherein the at least one transport roller is arranged on the carrier housing and driven by a controllable or regulatable drive,
• wherein the at least one contact pressure roller is not driven,
• wherein a weight is connected to an eccentrical element,
• wherein the eccentrical element is rotatably connected to the carrier housing at one side by a concentrically supported eccentrical element axle and the eccentrical element is rotatably connected on another side to the at least one contact pressure roller by an eccentrically supported contact pressure roller axle,
• wherein the welding device is pivotably arranged on the carrier housing so that the welding device is pivotable in a plane that is substantially parallel to a plane that is defined by the transport roller axle and the contact pressure roller axle in an operating position of the welding device,
• wherein the welding device is pivotable from a ready position where the welding device is not in contact with the plastic material webs to the operating position where the welding device is in contact with the plastic material webs,
• wherein the at least one contact pressure roller is caused by the weight to pivot about the eccentrical element axle in a first direction of rotation together with the weight,
• wherein the at least one contact pressure roller rotates about contact pressure roller axle in a second direction of rotation when the plastic material webs are welded by the portable table top welder,
• wherein the first direction of rotation is identical to the second direction of rotation,
• wherein the weight is arranged above the hot air nozzle, and
• wherein the weight moves downward towards the hot air nozzle when the the at least one contact pressure roller is caused by the weight to pivot about the eccentrical element axle in the first direction of rotation towards the at least one transport roller.