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Manual spraying device for spraying e.g. pharmaceutical product, has set of calibrated holes, where diameter of each hole ranges between specific micrometers and does not differ from mean of diameters of other holes by specific percentage
Manual spraying device for spraying e.g. pharmaceutical product, has set of calibrated holes, where diameter of each hole ranges between specific micrometers and does not differ from mean of diameters of other holes by specific percentage
The device has a spray nozzle (16) with an inner chamber receiving a non-gaseous fluid product e.g. pharmaceutical product, under pressure and delimited towards outer side by a perforated front wall (17b). A dispensing device is mechanically actuated by a push-button (9), and transfers the product from a reservoir to the inner chamber of the nozzle. The front wall has a set of calibrated holes (22), where diameter of each hole ranges between 1 and 100 micrometer and does not differ from a mean of the diameters of the other holes by above 20 percentages. The front wall is made of a material chosen from silicon, glass, metal, alloy, ceramics and polymers, and is made in the form of a complex including a polymer layer chosen form polyethylene and polypropylene, polyester layer and metallic material.
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