Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1978-06-21
1980-10-28
Goolkasian, John T.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
156 731, 156293, 1565801, 264 23, 422 56, 428138, 428167, 428185, B32B 310, B32B 3116
Patent
active
042307570
ABSTRACT:
An article and its method of manufacture is disclosed wherein three sheets of thermoplastic web material are bonded to form a laminated unit with an object captured therein. Energy director element sets are disposed between adjacent sheets in an orientation such that when the layers are brought together with the object therebetween and a compressive force and high frequency vibratory energy are applied to the unit, the pressure and vibratory energy are concentrated at a first portion of the energy director elements so that the thermoplastic material in the region of the concentrated pressure softens. A second portion of the energy director elements is aligned with, but spaced from the object to be captured between the sheets. The spacing corresponds generally with the thickness of the energy director elements so that, as the first portion of the energy director elements melts during sonic bonding, the second portion of the elements approaches the object. As bonding is completed, the second portion of the energy director elements contacts the object to securely hold it between the bonded sheets.
REFERENCES:
patent: 3661661 (1972-05-01), Berleyoung
patent: 3819437 (1974-06-01), Paine
patent: 3874963 (1975-04-01), Barger
patent: 3973064 (1976-08-01), Paine
patent: 3992158 (1976-11-01), Przybylowicz et al.
patent: 4060438 (1977-11-01), Johnson
patent: 4152390 (1979-05-01), Nosco et al.
Dawson Robert A.
Eastman Kodak Company
Goolkasian John T.
Sales M. S.
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