Device for connecting products mutually and an ultrasonic welding device

Device for attaching a first product to a second product, comprising an ultrasonic welding device which is intended and adapted to realize a durable welded connection between a wall of the first product and the second product, which welding device comprises an ultrasonic welding torch and an anvil which are each displaceable between a rest position, clear of the first product and the second product, and an active position opposite each other in which a wall part of the first product and a strip-like part of the second product lie therebetween, first supply means suitable and intended for receiving the first product thereon and supplying it in a transport direction to the welding device, and second supply means suitable and intended for receiving the second product and moving at least the strip-like part thereof close to the wall of the first product, wherein the welding device comprises a displaceable support arm and the anvil extends from the displaceable support arm with which the anvil is displaceable between the rest position and the active position, characterized in that at least one of the welding torch and the second supply means extends together with the anvil from the displaceable support arm and is displaceable at least particularly with the support arm between at least the rest position and the active position.