Patent ID: 7530382
Filing Date: 2009-05-12
Classification: A01G,B29C,B29L,Y02A

Abstract:
1. Device for continuous manufacture of drip irrigation tubes, comprising an extruding device for producing a tube body, a calibrating device, and a cooling device for the tube body, a feed apparatus for feeding dosing elements into the tube body along a guideway, the feed apparatus including a separating device into which each of the continuously fed dosing elements is captured, ejected onto the guideway, and inserted into the tube body by means of an airstream along the guideway, the airstream being producible with air jets formed by supply lines that communicate with the guideway and are disposed such that the airstream hits the dosing element to be advanced at an angle of about 25°, and means for connecting the dosing elements to the inner walling of the tube body, comprising a pressing element which is formed by the end area of the guideway and which protrudes into the extruded tube body, and a pressing roller which is able to be pressed against the tube body from the exterior in the region of the pressing element, the calibrating device being formed by a tubular body whose feed region narrows to the desired diameter of the tube body and whose longitudinally elongated body area protrudes into the cooling device, and is provided with a recess into which the pressing member protrudes so that the pressing and connecting process of the dosing elements with respect to the inner walling of the tube body ensues inside the calibrating device, the pressing roller having an indentation that corresponds to the outer contour of the tube body in the region of the calibrating device and having a bottom provided with a marking structure, the pressing roller being configured to cause the marking structure to provide a mark on the surface of the tube body in the region of the respective dosing element so as to facilitate locating the respective dosing element in the tube body when placing an outlet aperture through the tube body and the respective dosing element.