Electric heating – Metal heating – Of cylinders
Patent
1990-02-08
1991-03-19
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1053, 219 1071, 219 1073, 219 1079, 1562742, 1563802, H05B 610
Patent
active
050013190
ABSTRACT:
The invention relates to an inductive heating apparatus for carrying out a continuous weld along a moving web of laminated packing material (8). The apparatus includes two similar elongated metal plates (1) with two slots (2, 12). The metal plates (1) are arranged at some distance from one another and are connected electrically to one another and to an a.c. source (10). The laminated packing material (8) which is to be welded together is advanced between the two plates (1). Within the plates (1), pressure rollers (6) are arranged in a recess (5).
REFERENCES:
patent: 2708704 (1955-05-01), Duda, Jr.
patent: 2790055 (1957-04-01), Van Iperen
patent: 3038055 (1962-06-01), Ross
patent: 3395261 (1968-07-01), Leatherman et al.
patent: 3764767 (1973-10-01), Randolph
patent: 4694134 (1987-09-01), Ross
Leung Philip H.
Tetra Pak Holdings & Finance S.A.
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