# US 12,178,301 B2 · Glass hair styling iron with heat and light emitting source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,301 B2 - Document ID: US12178301B2 - Status: Granted - Kind: B2 - Application number: 17/121,058 - Filed: 2020-12-14 - Published: 2022-06-16 - Granted: 2024-12-31 - Earliest claimed: 2020-12-14 - Assignees: Conair Corporation - Applicants: Conair Corporation - Inventors: Sophia Wojczak; Paul James Carrubba; Daniel Bishop - Web page: https://patentgrep.com/patent/US12178301B2 ## CPC - A45D 1/16: with a single heated member (A45D1/02 takes precedence) - A45D 1/04: by electricity - A45D 1/28: with means for controlling or indicating the temperature - A45D 2200/205: Radiation, e.g. UV, infrared - A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING ## Abstract A hair styling iron includes a housing, a mandrel extending longitudinally from the housing, the mandrel having a proximal end adjacent to the housing, and a distal end opposite the proximal end, and a plurality of light emitting elements within the mandrel. The plurality of light emitting elements are light emitting diodes that emit light having a wavelength between about 620 to about 750 nm. A cross-sectional area of the mandrel at the proximal end is greater than the cross-sectional area of the mandrel at the distal end. ## Claims ### Claim 1 A hair styling iron, comprising: a housing; a mandrel extending longitudinally from the housing, the mandrel having a proximal end adjacent to the housing, and a distal end opposite the proximal end; and a plurality of light emitting elements within the mandrel, the plurality of light emitting elements being arranged in at least two linear arrays; wherein the plurality of light emitting elements are light emitting diodes that emit light having a wavelength between about 620 to about 750 nm; and wherein a cross-sectional area of the mandrel at the proximal end is greater than the cross-sectional area of the mandrel at the distal end; wherein the mandrel is formed from glass and is both light and radiation transmissive over an entire circumferential outer surface of the mandrel. ### Claim 2 (depends on 1) The hair styling iron of claim 1, wherein: the mandrel has a tapered or conical shape. ### Claim 3 (depends on 1) The hair styling iron of claim 1, further comprising: a tip extending from the distal end of the mandrel. ### Claim 4 (depends on 3) The hair styling iron of claim 3, wherein: the tip is painted or provided with an insulative material configured to inhibit heating of an exterior surface of the tip by radiation emitting elements positioned within the mandrel. ### Claim 5 (depends on 1) The hair styling iron of claim 1, wherein: the at least two linear arrays are parallel, linear arrays. ### Claim 6 (depends on 1) The hair styling iron of claim 1, wherein: the at least two linear arrays are non-parallel, linear arrays. ### Claim 7 A hair styling iron, comprising: a housing; a mandrel extending longitudinally from the housing; a first linear array of light emitting elements within the mandrel; and a second linear array of light emitting elements within the mandrel; wherein the first linear array and second linear array are parallel and arranged to emit light out of opposing sides of the mandrel away from one another and in opposite directions. ### Claim 8 (depends on 7) The hair styling iron of claim 7, wherein: the mandrel is formed from a light and/or radiation transmissive material. ### Claim 9 (depends on 8) The hair styling iron of claim 8, wherein: the mandrel is formed from glass. ### Claim 10 (depends on 8) The hair styling iron of claim 8, wherein: the mandrel has a tapered or conical shape. ### Claim 11 (depends on 8) The hair styling iron of claim 8, wherein: the mandrel is formed from glass; and wherein the mandrel has a tapered or conical shape. ### Claim 12 (depends on 11) The hair styling iron of claim 11, wherein: the light emitting elements are light emitting diodes that emit light having a wavelength between about 620 to about 750 nm. ### Claim 13 A hair styling iron, comprising: a housing; a mandrel extending longitudinally from the housing; a first linear array of light emitting elements within the mandrel; and a second linear array of light emitting elements within the mandrel; wherein the first linear array and second linear array are angled with respect to one another such that the first linear array and the second linear array are not parallel, and are arranged to emit light out of opposing sides of the mandrel away from one another and in opposite directions. ### Claim 14 (depends on 13) The hair styling iron of claim 13, wherein: the first linear array of light emitting elements and the second linear array of light emitting elements are both mounted on a single strip bent into a V-shape. ### Claim 15 (depends on 13) The hair styling iron of claim 13, wherein: the first linear array of light emitting elements and the second linear array of light emitting elements are mounted on first and second strips, respectively, that do not contact one another. ### Claim 16 (depends on 13) The hair styling iron of claim 13, wherein: the first linear array of light emitting elements and the second linear array of light emitting elements are mounted at an angle that corresponds to a shape of an outer surface of the mandrel. ### Claim 17 (depends on 16) The hair styling iron of claim 16, wherein: the outer surface of the mandrel has a conical or tapered shape. ### Claim 18 (depends on 13) The hair styling iron of claim 13, wherein: the light emitting elements are light emitting diodes that emit light having a wavelength between about 620 to about 750 nm. ### Claim 19 A hair styling iron, comprising: a housing; a mandrel extending longitudinally from the housing; a light tube within the mandrel; a first light emitting element positioned at a proximal end of the light tube and configured to emit light into the light tube; a second light emitting element positioned at a distal end of the light tube and configured to emit light into the light tube; and wherein the light tube is devoid of light emitting elements intermediate the first light emitting element and the second light emitting element. ### Claim 20 (depends on 19) The hair styling iron of claim 19, wherein: the light emitting elements are light emitting diodes that emit light having a wavelength between about 620 to about 750 nm.