Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1978-03-06
1979-06-26
Wityshyn, Michael G.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
53373, 53479, 93 441GT, 156358, 1565801, 1565802, B65G 5906, B65H 324
Patent
active
041592204
ABSTRACT:
A method and apparatus for forming a seal between layers of thermoplastic coated paperboard or the like wherein there are different numbers of layers and varying thicknesses at different locations within the area to be sealed. The apparatus includes an anvil having a work surface for engaging one outer surface of the layers and a horn that vibrates at a predetermined frequency when energized. The horn has a work surface that opposes the work surface of said anvil. A control circuit is operable for sequentially; (1) pre-triggering said horn, to energize it and cause it to vibrate; (2) moving said anvil and energized horn into the sealing position to clamp the paperboard layers therebetween and maintaining the clamping pressure over the entire area of the layers within predetermined limits, (3) holding the energized horn in the sealing position with respect to the anvil for a predetermined period of time to cause the thermoplastic coating of the paperboard layers between the work surfaces to be activated to flow, (4) deenergizing the horn to terminate the vibration thereof, (5) holding the anvil and deenergized horn in the sealing position with the paperboard layers clamped between the work surfaces thereof for a predetermined period of time to permit the activated thermoplastic coating to set, and (6) retracting the horn and anvil with respect to each other to unclamp the sealed paperboard layers.
REFERENCES:
patent: 3499808 (1970-03-01), Obeda
patent: 3666602 (1972-05-01), Obeda
patent: 3697357 (1972-10-01), Obeda
patent: 3905280 (1975-09-01), Egleston et al.
patent: 3910014 (1975-10-01), Braun
patent: 3956046 (1976-05-01), Tsuchiya et al.
patent: 3956975 (1976-05-01), Egleston et al.
patent: 3971300 (1976-07-01), Bachner
Bosche Eugene R.
Walke, Jr. Earl W.
Ex-Cell-O Corporation
Wityshyn Michael G.
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