Patents Assigned to Pearle, Inc.
  • Hot melt adhesive composition that melts at relatively low temperatures
    Patent number: 5326413
    Abstract: Novel lower temperature hot melt adhesive and coating composition that melts at temperatures less than 190.degree. F. (about 87.8.degree. C). This composition has a sufficient modulus to bind ophthalmic lenses to metal blocks during grinding processes. The composition also exhibits low melt viscosity and may be mechanically removed without leaving significant residue. Composition comprises a resin, a tackifier, a wax (generally with a molecular weight less than 600), and an optional stabilizer.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: July 5, 1994
    Assignee: Pearle, Inc.
    Inventors: Pascal E. Esemplare, Ronald W. Gumbs