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ZULAICA Y S R C FABRI Cia
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ZULAICA Y S R C FABRI Cia
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Application filed by ZULAICA Y S R C FABRI CiafiledCriticalZULAICA Y S R C FABRI Cia
Priority to ES0305922ApriorityCriticalpatent/ES305922A1/en
Publication of ES305922A1publicationCriticalpatent/ES305922A1/en
IMPROVEMENTS IN THE MANUFACTURE OF DRAWING CASES, characterized in that the upper area of the edges of two rectangular metal modules are regularly spaced a series of also rectangular holes of small height with respect to their bases, and that when introducing them in a suitable mold, with molten plastic material, this adheres to the suitable area and, therefore, also enters the rectangular holes provided in the said flanges in such a way that upon cooling a compact plastic mass is produced which, due to being embedded in the aforementioned holes, gives place to a grip of extraordinary solidity, which produces a perfect adjustment of the entire plastic mass to the area of the bead considered. (Machine-translation by Google Translate, not legally binding)
ES0305922A1964-11-111964-11-11Improvements in the manufacture of drawing cases. (Machine-translation by Google Translate, not legally binding)
ExpiredES305922A1
(en)