Method and line for the high-speed packaging of filter bags containing an infusion product
First Claim
1. A method for the high-speed packaging of pre-formed filter bags (1) containing metered quantities of an infusion product, comprising at least three steps, in the first of which the filter bags (1) are wrapped in a protective tubular envelope (2) formed by a longitudinal seal (5) and a transversal seal (6) making a flattened tube from a continuous strip (3) of envelope (2) material folded into a V shape with wings (4) between which the filter bags (1) are suitably placed at regular intervals from each other;
- in the second step, the tube being cut into predetermined lengths, each containing one filter bag (1) wrapped in an envelope (2); and
in the third step the filter bags (1), wrapped in the envelopes (2), being placed in cartons;
wherein 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 rest of the same transversal seal (6).
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Abstract
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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Citations
30 Claims
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1. A method for the high-speed packaging of pre-formed filter bags (1) containing metered quantities of an infusion product, comprising at least three steps, in the first of which the filter bags (1) are wrapped in a protective tubular envelope (2) formed by a longitudinal seal (5) and a transversal seal (6) making a flattened tube from a continuous strip (3) of envelope (2) material folded into a V shape with wings (4) between which the filter bags (1) are suitably placed at regular intervals from each other;
- in the second step, the tube being cut into predetermined lengths, each containing one filter bag (1) wrapped in an envelope (2); and
in the third step the filter bags (1), wrapped in the envelopes (2), being placed in cartons;
wherein 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 rest of the same transversal seal (6). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15)
- in the second step, the tube being cut into predetermined lengths, each containing one filter bag (1) wrapped in an envelope (2); and
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12. The method according to claim, wherein the squeezing step precedes the step of heat sealing the continuous strip (3) of material from which the envelopes (2) are made.
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16. A line for the high-speed packaging of pre-formed filter bags (1) containing metered quantities of an infusion product, comprising at least three consecutive working sections (23, 24, 25), in the first of which (23) the filter bags (1) are wrapped in a protective tubular envelope (2) formed by a longitudinal seal (5) and a transversal seal (6) making a flattened tube from a continuous strip (3) of envelope (2) material folded into a V shape with wings (4) between which the filter bags (1) are suitably placed at regular intervals from each other;
- in the second working section (24), the flattened tube being cut into predetermined lengths; and
in the third working section (25) the filter bags (1), wrapped in the envelopes (2), being placed in cartons;
wherein the first section (23) of the line (26) includes two separate and successive sealing units (27, 28) designed to make each transversal seal (6) on the continuous strip (3) in two consecutive steps, the first unit (27) making the first part of the seal and the second unit (28) completing it. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- in the second working section (24), the flattened tube being cut into predetermined lengths; and
Specification