Patent ID: 6978818

Claim:
In a device for affixing an adhesive label to a package, comprising a piston and a cylinder, said cylinder comprising: first and second connections arranged on a wall of the cylinder so as to be spaced apart from each other, said connections controlling the movement of said piston inside the cylinder by being alternatively connected to a pressure media source, to a source of negative-pressure or to a combination thereof, so that said piston is movable between a first dead center position near a first end of the cylinder, and a second dead center position near a second end of the cylinder, thereby causing a stamp to affix a label to the package, wherein the first connection is located at a position on the wall of the cylinder so that it is fully blocked by a cylindrical wall of the piston shortly before the piston reaches the first dead center position, thereby stopping any increase in negative pressure between the piston and the first end of the cylinder before the piston reaches its first dead center position.