Patent ID: 6817799
Filing Date: 2004-11-16
Classification: A45D

Abstract:
A dispenser (1) of a product (11), typically of a stick-form cosmetic product, including a body (2) forming a lateral wall (20) of a moulded plastic material delimiting a central cavity (21) intended to contain said product, with, at its upper end, an upper orifice (22), and, at its lower end, typically a bottom (23) including a circular lower orifice (24), a cap (3) intended to seal said upper orifice (22), a propellant device including a base-plate (4) and a piston (5), said base-plate (4), typically fitted with a channel or hollowed-out part (40), engaging with said lower orifice (24) typically by a means of assembly that provides a rotation of said base-plate (4) relative to said lateral wall (20) or said bottom (23), said base-plate (4) including a so-called â€œmaleâ€  helical thread axial screw (42), said piston (5) forming a support for said product, typically open-work with a hollowed-out part (51), and a central part (52) with a so-called â€œfemaleâ€  thread engaging by screwing with said axial screw (42), a toothed wheel (6) of external radius R engaging in rotation with said base-plate (4) to rotate said axial screw (42) manually, and correspondingly move said piston (5), and a means of sealing said lower orifice (24) and/or said hollowed-out part (40), characterised in that said lateral wall (20) includes an assembly:a) of an inner jacket (7) including an inner tubular part (70), of area cross-section Si and thickness Ec, forming at an upper end said upper orifice (22) and including at a lower end said lower orifice (24), said inner jacket typically delimiting said central cavity (21), b) and an outer body (8) including an outer tubular part of area cross-section Se>Si and thickness Ei, said thicknesses Ec and Ei being taken typically below 2 mm, so as to be able to manufacture said typically rigid dispenser using high throughput moulding and without dimensional distortion of said inner jacket (7) and said outer body (8) of plastic material, and in such a way that, since said inner tubular part is part of or is included in said outer tubular part, and cannot therefore be seen from the side, said outer body is able to have a cross-section different from that of said inner jacket, with in particular different radii of curvature for said outer body and for said inner jacket.