Abstract: The method of manufacturing a filtration bag for a liquid comprises placing two flexible thermoplastic sheets adapted to filter a liquid upon one another, and welding the sheets together along a desired seam line by vibration welding using tool means which forcibly engage the superposed sheets along the desired seam line.

Abstract: The machine is used to fold and glue paper covering borders onto cardboard or other materials and includes a folding element (9) with a symmetrical row of bristles for folding and gluing the borders passing through in both directions and capable of acting alternately in the two opposite directions; and, on both sides of the mechanism, symmetrical receiving, pressing and advancing elements (1, 3, 5, 7; 21, 25, 27), between which the semi-finished article is fed in a first direction of advance (fA) which is orthogonal to one side of the semi-finished article, and which are capable of operating alternately in two opposite directions (fA, fB) to carry out the folding of the two parallel and opposite borders of the article; a single article may be inserted twice in orientations orthogonal to each other for the folding of the four borders.

Abstract: In a process and machine for covering a tubular member, with a covering.

Abstract: An overlay is applied to a substrate, for example in the manufacture of book covers, by serially wrapping the overlay around a first pair of oppositely disposed edges of the substrate, folding the corners of the overlay into the substrate and wrapping the overlay around the two remaining edges of the substrate. The first wrapping of the overlay around a pair of edges of the substrate is accomplished by feeding the substrate with the overlay adhered thereto through a wrapping station alternately in opposite directions and deflecting the overhanging portion of the substrate at the leading edge out of the path of motion so that these overhanging portions may be engaged by a wrapping tool.