| 摘要 |
A method and a line for the high-speed packaging of filter bags ( 1 ) containing an infusion product comprises at least three successive operating steps whereby: the filter bags ( 1 ) are wrapped in a continuous protective tubular envelope ( 2 ) by sealing a continuous V-shaped folded strip ( 3 ) along a longitudinal sealing line ( 5 ) and transversal sealing lines ( 6 ); the tubular envelope ( 2 ) is cut into lengths; and the filter bags ( 1 ), individually wrapped in respective envelopes ( 2 ), are placed in cartons. In the method and line ( 26 ) according to the invention, the transversal seal ( 6 ) is made in two successive steps as the continuous folded strip ( 3 ) moves through two separate consecutive sealing stations ( 7, 8 ), the first station ( 7 ) making a part of the transversal seal ( 6 ) and the second station ( 8 ) completing the same transversal seal ( 6 ).
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