Patent ID: 6289936
Filing Date: 2001-09-18
Classification: F16L

Abstract:
A method for binding a connecting pipe to a principal pipe which has been reconstructed with a relining pipe of plastic material, said method comprising the steps of determining the mid-point of an opening in the principal pipe, which is located in the proximity of that end of the connecting pipe pointing toward the principal pipe, said step of determining occurring from the inside of the relining pipe; producing an opening in the relining pipe in the region of the mid-point by heating the plastic material of the relining pipe located in said region proceeding from the inside of the relining pipe; widening the produced opening by simultaneously exerting pressure onto the inside of the relining pipe in the direction toward the connecting pipe and heating the region of the plastic material on which the pressure is exerted proceeding from the inside toward the outside of the relining pipe to form a collar around the opening projecting into the end of the connecting pipe; applying a plastic material of the collar to an inside surface of the end of the connecting pipe pointing toward the principal pipe; fastening the plastic material of the collar to the inside of the connecting pipe; and further flattening and fastening the plastic material of the collar to the inside of the connecting pipe.