Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1983-06-29
1985-07-30
Wityshyn, Michael
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
156495, 156553, 156555, 228 1, 228 11, B29C 2708
Patent
active
045319995
ABSTRACT:
A method and apparatus for bonding together a plurality of juxtaposed webs which are subject to being ultrasonically bonded together to form a laminate as the webs are being driven forward at a relatively high velocity. The regions of the webs to be bonded are subjected to progressively increasing compressive forces while simultaneously being subjected to ultrasonic energy as they traverse an elongate portion of a predetermined path at a predetermined velocity. After the regions are ultrasonically bonded they may be subjected to another compression prior to the bonds becoming fully set upon cooling. The method may be practiced in an apparatus which includes an ultrasonic horn and an anvil which are configured and disposed to define a bonding passageway having an elongate convergent portion; and the apparatus may include a pressure roll biased towards the anvil adjacent the downstream end of the passageway. In a preferred apparatus embodiment: the anvil is a power-rotated cylinder having a relief-type bonding pattern disposed on its circumferential surface, and the face of the ultrasonic horn is so curved in the machine direction that the passageway has a convergent-divergent arcuate shape; the entrance to the passageway is sufficiently high to obviate web-splice induced jams; and the convergent portion of the passageway is preferably somewhat longer in the machine direction than the divergent portion.
REFERENCES:
patent: 3242029 (1966-03-01), Deans
patent: 3562041 (1971-02-01), Robertson
patent: 3733238 (1973-05-01), Long et al.
patent: 3836413 (1974-09-01), Frohlich et al.
Persson Louis T.
Riemersma Coenraad E.
Braun Fredrick H.
Slone Thomas J.
The Procter & Gamble & Company
Witte Richard C.
Wityshyn Michael
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