Patents by Inventor Shannon LOISELLE

Shannon LOISELLE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • High speed injection molding with heat/cool cycle for making optical articles
    Patent number: 11938694
    Abstract: A method for producing an optical article having a Fresnel microstructure and an injection molding system for producing such an article. The method includes heating and cooling a mold and applying a pressure to a thermoplastic material during injection molding of the optical article to facilitate formation of the Fresnel microstructure.
    Type: Grant
    Filed: October 8, 2018
    Date of Patent: March 26, 2024
    Assignee: Essilor International
    Inventors: Hao-Wen Chiu, Shannon Loiselle
  • Method for injection molding weld line free minus power lens elements
    Patent number: 11697256
    Abstract: A method for injection molding of a weld line free minus power lens element comprises injecting a melt of thermoplastic material at a temperature higher than a glass transition temperature (Tg) of the thermoplastic material in an initial molding cavity delimited by two facing mold inserts, wherein the melt of thermoplastic material comprises at least one UV absorber. During the injecting, the two facing mold inserts are moved toward one another to define a final molding cavity whose volume is less than that of the initial molding cavity. After cooling and disassembling of the two facing mold inserts, the weld line free minus power lens element is recovered. One of the two facing mold inserts comprises a flat surface facing the initial molding cavity, thereby to form a flat surface on one side of the weld line free minus power lens element.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: July 11, 2023
    Assignee: Essilor International
    Inventors: Hao-Wen Chiu, Shannon Loiselle, Shawn Mcdermott
  • High Speed Injection Molding with Heat/Cool Cycle for Making Optical Articles
    Publication number: 20200316886
    Abstract: A method for producing an optical article having a Fresnel microstructure and an injection molding system for producing such an article. The method includes heating and cooling a mold and applying a pressure to a thermoplastic material during injection molding of the optical article to facilitate formation of the Fresnel microstructure.
    Type: Application
    Filed: October 8, 2018
    Publication date: October 8, 2020
    Inventors: Hao-Wen CHIU, Shannon LOISELLE
  • METHOD FOR INJECTION MOLDING WELD LINE FREE MINUS POWER LENS ELEMENTS
    Publication number: 20190389159
    Abstract: A method for injection molding of a weld line free minus power lens element comprises injecting a melt of thermoplastic material at a temperature higher than a glass transition temperature (Tg) of the thermoplastic material in an initial molding cavity delimited by two facing mold inserts, wherein the melt of thermoplastic material comprises at least one UV absorber. During the injecting, the two facing mold inserts are moved toward one another to define a final molding cavity whose volume is less than that of the initial molding cavity. After cooling and disassembling of the two facing mold inserts, the weld line free minus power lens element is recovered. One of the two facing mold inserts comprises a flat surface facing the initial molding cavity, thereby to form a flat surface on one side of the weld line free minus power lens element.
    Type: Application
    Filed: January 26, 2018
    Publication date: December 26, 2019
    Inventors: Hao-Wen CHIU, Shannon LOISELLE, Shawn MCDERMOTT