Method and machine for wrapping infusion bags in outer envelopes
AssigneeI.M.A. Industria Macchine Automatiche S.P.A.
InventorDante Ghirlandi
Life of this patent
Estimating the term…
Abstract
A method and related machine for wrapping filter-bags (1) in sealed outer envelopes (S) comprises the following steps: feeding single, plane sheets (6) to a station (7) for wrapping each sheet (6) over a corresponding filter bag (1); folding the sheet (6) into a U-shape about a transversal axis (X) of the sheet (6) itself so as to form at least two opposite wings (6a, 6b) between which the filter bag (1) is placed; rolling the longitudinal edges (8a, 8b) of the U-shaped sheet (6) so as to flatten them; and, lastly, joining at least the longitudinal edges (8a, 8b) of the U-shaped sheet (6) to form a sealed outer envelope (S) around the filter bag (1).
Claims22
A method for wrapping filter bags for products for infusion in individual sealed outer envelopes, the filter bags comprising at least one chamber containing a charge of product, and a string connected at one end to the chamber, while the other end of the string is connected to a pick-up tag, the method comprising the following steps:
- feeding a succession of single, plane sheets to a station for wrapping each sheet over a corresponding filter bag;
- folding each sheet into a U-shape about a transversal axis of said each sheet around the filter bag so as to form at least two opposite wings between which the filter bag is placed;
- and
- joining at least longitudinal edges of said each sheet that is folded into a U shape to form a sealed outer envelope around the filter bag,
- wherein after the step of folding the sheet, the method further comprises a step of aligning the longitudinal edges with each other by simultaneously rolling the longitudinal edges.
A machine for wrapping filter bags for products for infusion in individual sealed envelopes, the filter bags comprising at least one chamber containing a charge of product and a string connected at one end to the chamber, while the other end of the string is connected to a pick-up tag, the machine comprising handling means for moving each filter bag in a working direction towards a station for wrapping a single, plane sheet of wrapping material around the filter bag;
- means for folding the sheet of wrapping material about a transversal axis of the sheet to form a U-shaped wrapping around the filter bag, with at least two opposite wings between which the filter bag is placed;
- and a station for joining at least two longitudinal edges of the U-shaped wrapping sheet to form a single sealed envelope around the filter bag;
- wherein the machine further comprises, after the wrapping station, at least a rolling station which comprises roller means for simultaneously rolling the longitudinal edges and aligning the longitudinal edges with each other.
Dependencies are inferred from the claim text.