Abstract: The present invention relates to an applicator device for applying a product of the fluid or pasty type to keratin fibres, comprising a central core (1) having an elongate shape which extends along a longitudinal axis XX, at least one row of elongate spikes (2) comprising a first end (20) embedded in the core and a second, free end (21). According to the invention, at least one of the spikes (2) is delimited by a first flat face (200) that is coincident with a longitudinal plane, known as the reference plane P, and by a second flat face (210) that forms an angle of between 10 and 180° with said first flat face, said at least one spike comprising a first region (22) that is embedded in the core (1) and has a substantially constant cross section in the form of a portion of a circle, and a second region (23) having a variable cross section that is situated substantially in the longitudinal continuation of said first region (22).

Abstract: A one-piece applicator device for applying a fluid or pasty product to keratin fibres includes a core that extends along a longitudinal axis XX and at least one flexible stem that is embedded at at least a first and a second point along the longitudinal core, the stem extending substantially along the longitudinal axis XX, spikes being provided on the core and/or on the at least one stem. The core is provided with at least one through-opening and the at least one flexible stem extends substantially in a radial plane and has at least a first and a second curve along its length, such that the stem crosses the at least one opening without contact in order to ensure mobility in a radial plane of the device.