Patent ID: 8646245

Claim:
A method for packaging a fluid product dispenser, where the dispenser comprises a reservoir of constant effective volume filled with a fluid product, and a dispensing device that comprises a dip tube configured to extract the fluid product contained in the reservoir on operation of the dispensing device, the reservoir and the dip tube being made from a material or materials that are substantially or perfectly transparent, where the dip tube is initially connected to the dispensing device and initially contains air, and the dip tube has one free end extending to a bottom of the reservoir, wherein the method comprises extracting the air from the dip tube and replacing the air by the fluid product when the dip tube is connected to the dispensing device; the method of extracting the air and replacing the air comprises the following successive steps: a. fitting the dispensing device onto the reservoir in an unsealed manner, so that the dip tube is immersed in the fluid product, while still filled with air, b. subjecting an interior of the reservoir and the dip tube to a vacuum so that the dip tube is emptied of the air, c. returning the interior of the reservoir to atmospheric pressure, and d. assembling the dispensing device onto the reservoir in a sealed manner.