| 摘要 |
<p>For producing transverse seams on tube bag machines, two conjointly, oppositely moving sealing tool jaws (15, 16) are provided, which are movable on a carriage (6) during the sealing process. For driving the sealing tool and selecting an appropriate stroke length, the frame (5) on which the carriage (6) rests is movable up and down by a pair of coupled cam-actuated levers (19). The axes of rotation (34) of two levers (19), and thus the distances travelled by their uncoupled, flapping ends, are adjustable along the lengths of the levers. This is accomplished by turning a spindle (3) bearing oppositely wound screw threads, which sets adjustment bodies (30) with sliding blocks (4) for the two-armed levers (19). Thus, packages of varying heights can be efficiently sealed, since the sealing mechanism always seals in the middle of the package height, regardless of stroke length selected.</p> |
