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Ind P B R S A
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Ind P B R S A
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Priority to ES1973189431UpriorityCriticalpatent/ES189431Y/en
Publication of ES189431UpublicationCriticalpatent/ES189431U/en
Application grantedgrantedCritical
Publication of ES189431YpublicationCriticalpatent/ES189431Y/en
Filtering sheet, of the type which is formed by an impregnated or similar paper and which is transversely folded in zig-zag, characterized essentially by having incorporated, at appropriate distances and in transverse direction with respect to the folds of the same, linear elements of thickness that prevent the indicated folds from coming to be juxtaposed completely. (Machine-translation by Google Translate, not legally binding)
Intercalable support elements of variable thickness for mechanical stacking of rooftops for rooftops. (Machine-translation by Google Translate, not legally binding)