×

Heat-sealable, ovenable containers and method of manufacture

  • US 4,387,551 A
  • Filed: 12/31/1980
  • Issued: 06/14/1983
  • Est. Priority Date: 09/21/1979
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for heat-sealing an ovenable board container containing a tray portion and a closure portion, one of said tray portion or said closure portion being provided with a thermoplastic polyester coating and the other of said tray portion or said closure portion being provided with a cross-linked, thermosetting polyester-containing coating, which comprises placing said tray portion and said closure portion into mutual contact to form an assembled container, and heat-sealing said assembled container at a temperature of about 496°

  • to 650°

    F. and at a contact pressure of about 108 to 200 psi to form a self-venting, easy-tear seal.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×