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Individual
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Individual
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Priority to ES0157810UpriorityCriticalpatent/ES157810U/en
Publication of ES157810UpublicationCriticalpatent/ES157810U/en
An improved lightweight binding, consisting of a profile obtained by extrusion that forms the spine and a portfolio of flexible material. The profile has a triangular section with a flat face that connects with the other two converging faces that start the sides of the spine. The triangular shape of the section of the profile of the spine is opened by the convergence line of the two lateral faces, forming in this theoretical vertex of the triangular section the insertion opening of the portfolio. The edges of the opening of the faces that limit the converging faces of the profile have protrusions in the form of small balls that imprison the sheets of the portfolio and the inner paper sheets that are held by virtue of the elastic pressure of the converging faces. (Machine-translation by Google Translate, not legally binding)
ES0157810U1970-04-211970-04-21Perfect lightweight binding (Machine-translation by Google Translate, not legally binding)
PendingES157810U
(en)
A method of making a tubular member for a heat exchanger or similar from a plate of substantially flat material. (Machine-translation by Google Translate, not legally binding)