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Individual
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Individual
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Priority to ES200627ApriorityCriticalpatent/ES200627A1/en
Publication of ES200627A1publicationCriticalpatent/ES200627A1/en
New system of formation of covers for binding of propeller that consists essentially of having together with the sheet of sheets to bind a sheet of cardboard or similar folded on itself provided with two rows of perforations coinciding with each other and with those of the sheets to be bound the wire propeller is then passed through the set of these perforations in the necessary length after which the cover sheet is opened by transferring its outer sheet to the opposite part so that a single cover is formed which completely covers the spine leaving through it only a few small sections of the binding helix. (Machine-translation by Google Translate, not legally binding)
ES200627A1951-11-171951-11-17A new system for forming covers for helix bindings (Machine-translation by Google Translate, not legally binding)
ExpiredES200627A1
(en)