Abstract A method for preparing a synthetic pipe for use in a float is disclosed. A first pipe is extruded by the use of a first extruding means and separating plates are inserted and fixed in the pipe in a tight manner at predetermined intervals in order to form chambers within the pipe. While the pipe is still heated and in a soft state from the extrusion, a perforating means perforates the wall of the first pipe, between the plates thus forming a communication between the atmosphere and the chamber. This eliminates the deformation of the pipe which would be caused if the chamber were sealed from the atmosphere. After the pipe has cooled, a second pipe is extruded around the first pipe in contact therewith in order to cover the first pipe and thus cover the perforations. In this manner, a closed pipe is formed which is suitable for use as a float. The insertion of the separating plates is conducted in such a manner that a ridge is formed at the point of insertion. This is the finished pipe, a plurality of circumferential ridges at predetermined lengths giving an appearance similar to bamboo.
A METHOD OF PREPARING A SYNTHETIC PIPE FOR USE IN A FLOAT COMPRISING: A. EXTRUDING A FIRST PIPE B. INSERTING AT LEAST TWO PLATES INTO SAID FIRST PIPE AT PREDETERMINED INTERVALS, C. FIXING SAID PLATES TO THE INNER SURFACE OF SAID FIRST PIPE AS SAID FIRST PIPE IS BEING EXTRUDED, D. PERFORATING THE WALL OF SAID FIRST PIPE BETWEEN SAID PLATES WHILE SAID FIRST PIPE IS STILL HEATED AND IN A SOFT STATE FROM THE EXTRUSION, WHEREBY THE SPACE BETWEEN SAID PLATES COMMUNICATES WITH THE ATMOSPHERE, E. EXTRUDING A SECOND PIPE AROUND SAID FIRST PIPE AND IN CONTACT THEREWITH WHEREBY SAID SECOND PIPE AND IN FIRST PIPE AND CONVERS SAID PERFORATIONS THEREBY FORMING A CLOSED PIPE.
Claim 2
Independent Claim
116 words
A METHOD OF PREPARING A SYNTHETIC PIPE FOR USE IN A FLOAT COMPRISING: A. EXTRUDING A FIRST PIPE B. INSERTING AT LEAST TWO PLATES INTO SAID FIRST PIPE AT PREDETERMINED INTERVALS, C. FIXING SAID PLATES TO THE INNER SURFACE OF SAID FIRST PIPE AS SAID FIRST PIPE IS BEING EXTRUDED, D. PERFORATING THE WALL OF SAID FIRST PIPE BETWEEN SAID PLATES WHILE SAID FIRST PIPE IS STILL HEATED AND IN A SOFT STATE FROM THE EXTRUSION, WHEREBY THE SPACE BETWEEN SAID PLATES COMMUNICATES WITH THE ATMOSPHERE, E. EXTRUDING A SECOND PIPE AROUND SAID FIRST PIPE AND IN CONTACT THEREWITH WHEREBY SAID SECOND PIPE AND IN FIRST PIPE AND CONVERS SAID PERFORATIONS THEREBY FORMING A CLOSED PIPE.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein fixing said plates includes pinching said first pipe immediately after said separating plates have been inserted.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein fixing said plates includes heating the edges of said plate prior to insertion in said first pipe.
Claim 5
Dependent Claim
41 words
The method of claim 1 further including drawing said first pipe a faster rate after said plate is inserted than before said plate is inserted whereby a ridge is formed on the outer surface of said first pipe around said plate.
Claim 6
Dependent Claim
29 words
The method of claim 4 further including drawing said second pipe at a rate faster than said first pipe whereby a corresponding ridge is formed in said second pipe.