Harry B Egleston

US Patent:

D2668300, Nov 9, 1982

Filed:

Oct 27, 1980

Appl. No.:

6/200787

Inventors:

Harry B. Egleston - Whitmore Lake MI

International Classification:

D0903

US Classification:

D 9416

US Patent:

39569756, May 18, 1976

Filed:

Mar 19, 1975

Appl. No.:

5/559848

Inventors:

Harry B. Egleston - Livonia MI
Robert E. Lisiecki - Orchard Lake MI
Duncan J. Crawford - Franklin MI
Eric A. Braun - Northville MI
Earl W. Walke - Oak Park MI

Assignee:

Ex-Cell-O Corporation - Detroit MI

International Classification:

B31B 166

US Classification:

93 49M

Abstract:

Apparatus and method for forming sealed joints by welding layers of thermoplastic coated paperboard together. One outer surface of the paperboard layers is placed in engagement with back-up means, and the opposite outer surface of the paperboard layers is engaged by vibrating means so that the thermoplastic coating of the paperboard is heated by the vibration to weld the layers together. The apparatus and method is particularly useful in forming sealed joints for paperboard cartons, such as milk cartons of the type shown, for example, in U. S. Pat. No. 3,309,841. The vibrating means may be an ultrasonic transducer of the type disclosed in U. S. Pat. No. 3,526,792, for example.