| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and machine for wrapping filter bags in sealed outer envelopes without altering the general structure of existing machinery to make outer envelopes of good quality and ensuring a proper seal. <P>SOLUTION: The method includes the following steps of: 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 to form at least two opposite wings between which the filter bag is placed; rolling longitudinal edges of the U-shaped sheet 6 to flatten these sheets 6; and joining at least the longitudinal edges 8a, 8b of the U-shaped sheet 6 to form the sealed outer envelope S around the filter bag 1. <P>COPYRIGHT: (C)2012,JPO&INPIT |
