Patent ID: 7404482

Claim:
A lateral guidance device for products moving on a conveyor track of a goods handling system, the device comprising: at least one hollow guide located along at least one part of said conveyor track, at least two lateral profiles fitting together with each other, each with an inner face and an outer face, with at least one of said outer faces being a lateral external guidance face, an upper face and a lower face, where said guidance device is equipped with means for lateral adjustment of said lateral external guidance face, at least one expandable chamber housed in said hollow guide, at least one means to supply said expandable chamber with expansion fluid, return means to facilitate the return of said lateral external faces of said profiles to a position of minimum distance between said lateral external faces, when said expandable chamber ceases to be supplied with fluid, so that the distance between said outer faces of said profiles is adjustable as a function of supplying of said chamber with expansion fluid, between said minimum distance and a maximum distance.