US 12,232,594 B2
Cosmetic ink application device and a method of applying cosmetic ink
Woo Ram Park, Kawasaki (JP); Chin Kai Lee, Kawasaki (JP); and Vishal Sharma, Kawasaki (JP)
Assigned to L'Oreal, Paris (FR)
Appl. No. 17/619,963
Filed by L'OREAL, Paris (FR)
PCT Filed Jun. 19, 2020, PCT No. PCT/JP2020/025120
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/256157, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-115671 (JP), filed on Jun. 21, 2019.
Prior Publication US 2022/0354234 A1, Nov. 10, 2022
Int. Cl. B41J 3/407 (2006.01); A45D 34/04 (2006.01); A45D 44/00 (2006.01); B41J 11/00 (2006.01); B41J 29/393 (2006.01); B41M 5/00 (2006.01)
CPC A45D 44/005 (2013.01) [A45D 34/04 (2013.01); B41J 3/4073 (2013.01); B41J 11/008 (2013.01); B41J 29/393 (2013.01); B41M 5/0047 (2013.01); B41M 5/0088 (2013.01); A45D 2200/205 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A kit comprising:
a cosmetic ink application device; and a marker agent
wherein a region of the skin to which the marker agent is applied forms the marker region,
wherein the cosmetic ink application device comprises:
a light source for irradiating human skin with ultraviolet light;
an optical sensor for detecting intensities of fluorescence in an ultraviolet range and/or a visible light range emitted from the skin in response to the irradiation of the ultraviolet light;
an applicator for applying a cosmetic ink on the skin;
a head portion for holding the light source, the optical sensor, and the applicator; and
a controller, wherein the controller:
defines a region on the skin which emits fluorescence having an intensity different from fluorescence emitted from other regions of the skin when irradiated with the ultraviolet light, as a marker region by moving the head portion parallel to a surface of the skin,
determines a position for carrying out the ink application based on the marker region, and
causes the applicator to apply the ink to a predetermined portion of the skin, and
wherein the marker agent is prepared such that the difference between the intensity of the fluorescence emitted from the marker region and the intensity of the fluorescence emitted from the regions of the skin other than the marker region when irradiated with ultraviolet light reaches the threshold value or less after a predetermined time has elapsed from the application of the marker agent.