Patent ID: 7559184
Filing Date: 2009-07-14
Classification: B65B

Abstract:
1. A packaging machine for tubular bags, comprising: a film feed device; a forming collar to shape a film web into a tube, a film transport device to pull the film web over the forming collar, wherein the film transport device is disposed downstream of the forming collar viewed in the material flow direction of the film web, wherein the film transport device has two transport elements each acting on respective edge areas of the film web; a film joining device to bond opposite edge areas of the film web together, wherein the film joining device is disposed downstream of the forming collar, viewed in the material flow direction of the film web; a sensor device to detect a misalignment of the film web perpendicular to the material flow direction of the film web, the sensor device disposed between the forming collar and the film joining device, viewed in the material flow direction of the film web; a control device to which the misalignment is transmitted, wherein the transport elements are actuated by the control device independently of one another; and a tracking device actuated by the control device to counteract the misalignment of the film web perpendicular to the material flow direction, wherein the tracking device is disposed between the forming collar and the film joining device, viewed in the material flow direction of the film web.