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Priority to ES0245594ApriorityCriticalpatent/ES245594A3/en
Publication of ES245594A3publicationCriticalpatent/ES245594A3/en
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Abstract
Improvements in the bobbin holders for conical tubes, characterized in that the retention of the conical cardboard tubes by the bobbin holder is carried out by means of an increase in diameter that undergoes a continuous and solid ring of elastic material which is deformed in circumferential direction, at cost of the reduction of its cross section and at the instance of forces exerted radially on its inner surface, effort to which are transmitted, gradually and uniformly, by elements interspersed between said inner surface of the elastic ring and a body, displaceable axially and internally with respect to said ring and transmitting elements, which acts on these last elements because of the efforts exerted on it by means other than these improvements. (Machine-translation by Google Translate, not legally binding)
ES0245594A1958-11-181958-11-18Improvements in the conveyor tubes (Machine-translation by Google Translate, not legally binding)
ExpiredES245594A3
(en)