Sealing assembly to fill and seal a reservoir or a disposable gas lighter

A sealing assembly, enabling to fill and seal a gas reservoir of a lighter, the sealing assembly comprising:

• a reservoir body with a cylindrical well provided in the reservoir body, the cylindrical well having an inner wall,
• a plug, intended to be received in the cylindrical well, the plug having a front section and a rear section, the front section comprising radial projections and at least one recess to provide a fluid passage, the rear section having a circular bulge portion, and a weld portion adapted to be melted by welding,
• wherein the plug is adapted to be moved from a first axial position in which the at least one recess provides a filling passage between an inner portion of the gas reservoir and an outside of the gas reservoir, to a second axial position providing a temporary seal position in which a gastight contact is provided between the circular bulge portion of the plug and the inner wall of the cylindrical well, and further from the second axial position to a third axial position providing a definitive seal position in which the weld portion of the plug is joined in a gastight manner to an inner wall of the gas reservoir, and
• wherein, in the first axial position, the front section is in contact with an inner face of the cylindrical well.