Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Sicedison SpA
Original Assignee
Sicedison SpA
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Publication date
Application filed by Sicedison SpAfiledCriticalSicedison SpA
Priority to ES0285996ApriorityCriticalpatent/ES285996A3/en
Publication of ES285996A3publicationCriticalpatent/ES285996A3/en
Improvements in the construction of valve bags, of the type that can be formed by a sheet of flexible material, for example of plastic material, characterized in that the constituent part of the material inlet valve is obtained by means of an edge initially projecting above of the upper edge of said sheet, whose flange is folded inwards along a generatrix of a tubular piece constituted by said sheet and located in the middle part of the rim, the latter then folding so as to be carried inside the bag, below said upper edge, closing the upper edges of the bag and flange by welding together. (Machine-translation by Google Translate, not legally binding)
ES0285996A1963-03-121963-03-12Improvements in the construction of bags with valves (Machine-translation by Google Translate, not legally binding)
ExpiredES285996A3
(en)
Procedure and device for the manufacture of valve bags with crossed fund of synthetic material (Machine-translation by Google Translate, not legally binding)
Improvements in the manufacture of bags of plastic material provided of valve of load and closure (Machine-translation by Google Translate, not legally binding)