The invention relates to a method for manufacturing packages comprising a tubular body made from a cardboard material and a sealing structure made from a cardboard material, and machines implementing said method, comprising supplying a sealing unit (2) with preformed tubular bodies, two by two, and with sealing structures in the form of flat portions, two by two, each one comprising a central part with a shape conjugated to the shape of the opening of the tubular bodies, surrounded by a peripheral portion that can be folded down that is sufficient to assemble a sealing structure sealably with the inner side wall of the tubular body, inserting pairs of sealing structures into a forming tool (7), and forming them in a bowl, inserting, placing and sealing bowls in the tubular bodies using said forming tool; transferring, two by two, the tubular bodies assembled to the sealing structures to a finishing unit (10), if the sealing structure is a lid, precutting (14) the side wall of said tubular body and partially precutting said lid along a peripheral line, at least one finishing operation for the end of the package bearing said sealing structure.

Method for making a closure for closing a container, the closure including a closure body made of paper and an inner sealing element attached to the closure body, the method includes the following steps: providing a sheet material including at least a paper layer and a sealing layer, removing an excess portion of the sealing layer from the sheet material so that the remaining portion of the sealing layer forms the inner sealing element in the sheet material; by use of a forming device, forming the sheet material, in which the inner sealing element has been previously formed, to realize the closure body having the inner sealing element attached.

A lid from paper, paperboard or paper-like material for a container, wherein the lid is produced from an integral planar blank and has a lid plate and a lid collar. The lid collar proceeds from a periphery of the lid plate, and the lid collar is formed from at least two plies of the planar blank. A first ply of the lid collar, proceeding from the periphery of the lid plate, extends to a periphery of the lid collar, and wherein a second ply of the lid collar, from the periphery of the lid collar, on a radially inner side of the lid collar extends to a periphery of the second ply of the lid collar. The periphery of the second ply of the lid collar at least in portions is received in a groove in the region of the periphery of the lid plate.

A method for producing a breakable weak point in molded bodies made of fiber-containing material is described. Further, a tool for producing a breakable weak point in molded bodies made of fiber-containing material is described. A molded body made of fiber-containing material is also described. The molded body has at least one surface portion that has at least one region with a breakable weak point.