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Individual
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Individual
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Application filed by IndividualfiledCriticalIndividual
Priority to ES0307576ApriorityCriticalpatent/ES307576A3/en
Publication of ES307576A3publicationCriticalpatent/ES307576A3/en
Improvements in the manufacture of screws, characterized by constituting them composed of a metal core comprising an essentially cylindrical body and an end head provided with means for the application of a screwing tool, and a molded coating of a plastic material of appropriate mechanical characteristics , which completely covers said body of the soul, presenting on its outer surface the thread of the screw, and with an extreme expansion that wraps around the head of the core, exposing only the surface thereof to which the screwing tool is applied. (Machine-translation by Google Translate, not legally binding)
ES0307576A1964-12-181964-12-18Improvements in the manufacture of screws. (Machine-translation by Google Translate, not legally binding)
ExpiredES307576A3
(en)