Cosmetic applicators and methods of manufacture
A molded plastic applicator for cosmetics, such as a mascara brush, including an integral molded plastic panel that lies substantially in a mold plane when formed and is bent out of the mold plane to surround an extended longitudinal axis when the applicator is assembled. A plurality of openings, or projections such as bristles, are formed in or on the panel so as to be oriented substantially in a common pull direction transverse to the mold plane when the panel lies in the mold plane and to be oriented substantially radially of the longitudinal axis in directions distributed around the axis when the panel is bent to surround the axis. A retainer holds the panel bent out of the plane in surrounding relation to the axis. The panel may be formed as a plurality of free-ended limbs, radiating from a hub through which the longitudinal axis extends, and bent down around the axis; alternatively, it may be generally rectangular as formed, and bent into a cylinder about the axis, or it may be formed as a band that is wound helically about the axis. A method of making the applicator includes steps of molding the panel, bending the panel about the axis, and retaining the panel in the bent configuration.
1. A molded plastic applicator for cosmetics, comprising:
(a) an integral molded plastic panel lying substantially in a mold plane when formed and bent out of the mold plane to surround an extended longitudinal axis;
(b) a plurality of features formed in or on the panel, oriented substantially in a common pull direction transverse to the mold plane when the panel lies in the mold plane and oriented substantially radially of the longitudinal axis in directions distributed around the axis when the panel is bent to surround the axis; and
(c) further including a retainer holding the panel bent out of the plane in surrounding relation to the axis;
wherein said panel is sufficiently flexible so as to be bent around said axis with substantially continuous surface curvature, and said features are projections formed on and extending outwardly from the bent panel,
wherein said panel comprises an elongated band having a surface, said features are projections extending from said surface, and said band is bent into a helix around said axis with said surface facing outwardly, and
wherein said retainer comprises a wire extending longitudinally through said band, said wire being twisted helically to form and maintain said helix and said band being molded around said wire.
2. A molded plastic applicator for cosmetics, comprising a plastic panel molded around an elongated bendable and shape-holding insert, the panel initially lying substantially in a mold plane and being transformed to a bent configuration at least partially out of the mold plane by bending the insert, and a plurality of features formed in or on the panel, initially oriented in at least one of (i) a substantially common pull direction transverse to the mold plane and (ii) the mold plane, at least some of the features being reoriented relative to others of the features when the panel is transformed to the bent configuration,
wherein the insert is a wire having opposed ends, and the panel is transformed into the bent configuration by a process comprising bending the wire into substantially a U shape having substantially parallel legs and twisting the legs about each other, and
wherein the features are bristles projecting from the panel and have greater flexibility in a first direction transverse to their lengths than in a second direction transverse to their lengths.