Patent ID: 7380987

Claim:
A method for closing an opening in an at least partially filled sack for storing different materials in the form of pellets, granules, grain, seed or similar, comprising the steps of introducing an elongated means into the sack through the opening for closing thereof, bringing a substantially flat side of a plate connected to a first end of the elongated means into contact with an outer side around the opening when the elongated means is introduced into the sack, and retaining the elongated means in the sack through a head or a screw thread arranged in the vicinity of a second end of the elongated means, the elongated means provided with a larger cross section area at the second end than at the first end thereof or provided with a portion projecting substantially perpendicular from the elongated means, the elongated means at least partially along its extent being enclosed by the material inside the sack so that the material between the opening and the head or screw thread forms a resistance to retain the elongated means inside the sack.