Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1977-04-29
1980-09-02
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
53388, 53463, 156538, 1565832, 1565834, 219228, 219243, 219258, 219347, 219352, H05B 100, B30B 1534, B65B 5114
Patent
active
042208475
ABSTRACT:
An apparatus for thermal sealing and bonding the ends of foil wrapped cigarette packages includes a conveyor for transporting a stack of packages through a heat sealing station having heat sealing units arranged on opposite sides of the path of travel of the conveyor for simultaneously heat sealing the ends of the packages. Each heat sealing unit includes a plurality of thin superposed spaced heating strips equal in number to the packages in the stack and mounted in a housing for unitary movement into contact with the ends of the stacked packages. The strips have a low thermal inertia and are made of a metal having a high heat conductivity. The housing encloses a plurality of infrared radiators, one for each strip, spaced from the side of the strips opposite the side of adapted to contact the package ends for heating the strips by radiant heat in a contact free manner. The radiators are fixedly mounted independently of the housing and the housing is supported for selective movement relative to the fixedly mounted radiators to bring the heating strips into and out of contact with the package ends.
REFERENCES:
patent: 1708079 (1929-04-01), Brewer
patent: 1954128 (1934-04-01), Heyroth
patent: 2222327 (1940-11-01), Walkup
patent: 2397236 (1946-03-01), Boyd
patent: 2403115 (1946-07-01), Olving
patent: 3098922 (1963-07-01), Paxton
patent: 3472721 (1969-10-01), Abramson et al.
patent: 3509317 (1970-04-01), Valsamakis et al.
patent: 3521031 (1970-07-01), Wahle
patent: 3533352 (1970-10-01), Miller
patent: 3543002 (1970-11-01), Poole
patent: 4029935 (1977-06-01), Archer et al.
Focke Heinz
Liedtke Kurt
Bartis A.
Focke & Pfuhl
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