An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibers which extend from the core and are held by the core, the core having a main longitudinal direction of extension, known as the main axis (X), and the core being rectilinear along the main axis (X), the fibers forming an envelope (E) with their free ends, characterized in that the envelope (E) comprises, along the main axis (X), a substantially concave face (F1) and a substantially convex, opposite, face (F3).

An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibers which extend from the core and are held by the core, the core having a main longitudinal direction of extension, known as the main axis (X), and the core being rectilinear along the main axis (X), the fibers forming an envelope (E) with their free ends, characterized in that the envelope (E) comprises, along the main axis (X), a substantially concave face (F1) and a substantially convex, opposite, face (F3).

An apparatus for manufacturing an individual brush unit constituting a rotary brush by being stacked in multiple layers, includes an anvil having an insertion hole through which a filament group passes, a filament feeding unit which feeds the filament group from a feeder including a ring cutter on a tip and holds the filament group while a predetermined amount of the filament group protrudes outward from the insertion hole of the anvil, and an ultrasonic welder including a horn having a horn tip portion which pushes and radially expands a protruding tip of the filament group and welds a central part of the expanded filament group, to form the individual brush unit. A core of the welded central part is sandwiched between the ring cutter and the horn tip portion and is cut out, to simultaneously form a shaft hole and separate the individual brush unit from the filament group.

An apparatus for manufacturing an individual brush unit constituting a rotary brush by being stacked in multiple layers, includes an anvil having an insertion hole through which a filament group passes, a filament feeding unit which feeds the filament group from a feeder including a ring cutter on a tip and holds the filament group while a predetermined amount of the filament group protrudes outward from the insertion hole of the anvil, and an ultrasonic welder including a horn having a horn tip portion which pushes and radially expands a protruding tip of the filament group and welds a central part of the expanded filament group, to form the individual brush unit. A core of the welded central part is sandwiched between the ring cutter and the horn tip portion and is cut out, to simultaneously form a shaft hole and separate the individual brush unit from the filament group.

A toothbrush comprises a plurality of bristles, each of which comprises an upper part and a lower part, wherein toughness of the lower part is smaller than the toughness of the upper part, an enrooting member into which the bristles are enrooted, wherein the enrooting member comprises a plurality of enrooting holes that receive the plurality of bristles, wherein each of enrooting hole comprises an enrooting recess that receives the lower part of the bristle. A method of manufacturing a toothbrush comprises steps of cutting a predetermined length from a plastic wire; processing the cut wire into a bristle having an upper part and a lower part, wherein toughness of the lower part is smaller than the toughness of the upper part; and enrooting the bristles into a plurality of enrooting holes of the enrooting member.

An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibres which extend from the core and are retained by the core, the core extending in a main longitudinal direction, referred to as the main axis (X), the core being rectilinear along the main axis (X), and the fibres forming an envelope (E) with their free ends. The envelope (E) has four faces (F1-F4), the faces (F1-F4) each having a plane of symmetry comprising the main axis (X), each of the four faces (F1-F4) being generated by a straight line, referred to as a generating line, orthogonal to the main axis (X) and orthogonal to the plane of symmetry of the face (F1-F4), at least two consecutive faces (F1, F2) of the four faces (F1-F4) having a curved profile along the main axis (X).

An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibres which extend from the core and are retained by the core, the core extending in a main longitudinal direction, referred to as the main axis (X), the core being rectilinear along the main axis (X), and the fibres forming an envelope (E) with their free ends. The envelope (E) has four faces (F1-F4), the faces (F1-F4) each having a plane of symmetry comprising the main axis (X), each of the four faces (F1-F4) being generated by a straight line, referred to as a generating line, orthogonal to the main axis (X) and orthogonal to the plane of symmetry of the face (F1-F4), at least two consecutive faces (F1, F2) of the four faces (F1-F4) having a curved profile along the main axis (X).

Described is an industrial brush (1) comprising a brush body (2) obtained by the solidification of a metal in which the metal wires are locked in a rigid fashion for a first portion (3) thereby having a rigid body. The second portion of metal wires (4) is, on the other hand, free to perform brushing when the brush body (2) is rotated about a relative axis (5). The brush body (2) incorporates the metal wires with a structural coupling (with zero tolerance) which keeps unaltered the relative characteristics over time, with heat variations and at high speeds of rotation. It is also possible to construct the elements of traditional brushes with the same metal and a process is described for constructing new geometrical shapes for producing brushes with synthetic and natural wires with the traditional systems. Also described is a process for making a brush (1) comprising the steps of feeding in a mold (8) a metal in the molten state (melting temperature less than 2000 C.), in such a way that the first portion of the metal wires (3) is immersed in the metal which, when solidifying, forms a brush body with a rigid structure with a high mechanical strength such as to render perfectly stable the operation of the brush at high speeds and at high temperatures. During solidification of the molten metal there is also a heat treatment on the metal wires which improves their mechanical characteristics. Flanges, outer cups and inner cups with innovative embodiments can also be made with the same molding process, improving the characteristics of the traditional brushes.

Described is an industrial brush (1) comprising a brush body (2) obtained by the solidification of a metal in which the metal wires are locked in a rigid fashion for a first portion (3) thereby having a rigid body. The second portion of metal wires (4) is, on the other hand, free to perform brushing when the brush body (2) is rotated about a relative axis (5). The brush body (2) incorporates the metal wires with a structural coupling (with zero tolerance) which keeps unaltered the relative characteristics over time, with heat variations and at high speeds of rotation. It is also possible to construct the elements of traditional brushes with the same metal and a process is described for constructing new geometrical shapes for producing brushes with synthetic and natural wires with the traditional systems. Also described is a process for making a brush (1) comprising the steps of feeding in a mold (8) a metal in the molten state (melting temperature less than 2000 C.), in such a way that the first portion of the metal wires (3) is immersed in the metal which, when solidifying, forms a brush body with a rigid structure with a high mechanical strength such as to render perfectly stable the operation of the brush at high speeds and at high temperatures. During solidification of the molten metal there is also a heat treatment on the metal wires which improves their mechanical characteristics. Flanges, outer cups and inner cups with innovative embodiments can also be made with the same molding process, improving the characteristics of the traditional brushes.

An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibers which extend from the core and are held by the core, the core having a main longitudinal direction of extension, known as the main axis (X), and the core being rectilinear along the main axis (X). The fibers form an envelope (E) with their free ends, the envelope (E) comprising faces (F1-F4) which alternate about the main axis (X), the faces (F1-F4) being curved, a cross section made transversely to the main axis (X), known as the cross section, having a substantially polygonal shape so as to form edges between the curved faces (F1-F4).