Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1975-03-19
1976-05-18
Coan, James F.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
53375, 93DIG1, 93 441R, 156 731, B31B 166
Patent
active
039569756
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.
REFERENCES:
patent: 3224915 (1965-12-01), Balamuth et al.
patent: 3239995 (1966-03-01), Monroe et al.
patent: 3241291 (1966-03-01), Monroe et al.
patent: 3468731 (1969-09-01), Obeda
patent: 3507095 (1970-04-01), Kuhnle
Braun Eric A.
Crawford Duncan J.
Egleston Harry B.
Lisiecki Robert E.
Walke, Jr. Earl W.
Coan James F.
Ex-Cell-O Corporation
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