Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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CRIADO
Lorenzo S A
Original Assignee
CRIADO
Lorenzo S A
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Filing date
Publication date
Application filed by CRIADO, Lorenzo S AfiledCriticalCRIADO
Priority to ES365542ApriorityCriticalpatent/ES365542A1/en
Publication of ES365542A1publicationCriticalpatent/ES365542A1/en
Process for manufacturing a composite tube, characterized in that the inner lining of the tube is first prepared, either by extrusion when it is small diameters, or by calendering for larger diameters; this inner lining of rubber, rubber or similar material being; this liner is placed on a mandrel or metallic tube that acts as an internal mold, the outer diameter of this mandrel being corresponding to the caliber of the tube to be manufactured. (Machine-translation by Google Translate, not legally binding)
ES365542A1969-04-011969-04-01Procedure for manufacturing a compound pipe. (Machine-translation by Google Translate, not legally binding)
ExpiredES365542A1
(en)
A new procedure for the manufacture of concrete pipes with precompressed or pretensed duels (Machine-translation by Google Translate, not legally binding)