초록 ▼

Two holders (27-30) arranged on both sides of the mid-plane (4) of a conveyed tubular bag (1) are rotated in parallel directions by crank mechanisms (15-18). A sealing jaw (37) or matching jaw (38) is vertically guided in the holders (27-30) and prestressed by a spring (41) against a stop (44). Stop

Two holders (27-30) arranged on both sides of the mid-plane (4) of a conveyed tubular bag (1) are rotated in parallel directions by crank mechanisms (15-18). A sealing jaw (37) or matching jaw (38) is vertically guided in the holders (27-30) and prestressed by a spring (41) against a stop (44). Stopping rollers (62) project sideways from the jaws (37, 38) and bump against supporting strips (48, 49) before the jaws (37, 38) touch each other. The supporting strips (48, 49) are moved against each other by a controller (54) in such a way that the vertical components of motion of the jaws are delayed in a controlled manner. On the contrary, before the jaws (37, 38) are moved away from each other, they are accelerated up to the required vertical speed to bump softly against the stop (44). This device works without noise, is gentle to the material and may be adapted to various working conditions.

대표청구항 ▼

[ I claim:] [1.] A transverse sealing apparatus for sealing a packaging tube (1), in particular, for a tubular bag packaging machine, comprisingtwo drive units (15-21) arranged on opposite sides of a center plane (4) of the packaging tube (1), which drive a first and second holder (27-30) to be circ

[ I claim:] [1.] A transverse sealing apparatus for sealing a packaging tube (1), in particular, for a tubular bag packaging machine, comprisingtwo drive units (15-21) arranged on opposite sides of a center plane (4) of the packaging tube (1), which drive a first and second holder (27-30) to be circulating synchronously and counter to one another,a sealing jaw (37), which is guided in the first holder (27, 29) so as to be displaceable and biased by a first contact pressure element (41) against a first stop (44), from which sealing jaw is projecting a first stop element (62),an opposite jaw (38), which is guided in the second holder (28, 30) so as to be displaceable and biased by a second contact pressure element (41) against a second stop (44), from which opposite jaw is projecting a second stop element (62),two movable supporting elements (48, 49) with supporting surfaces (50, 51),a control device (54) for moving the supporting elements (48, 49) in such a way that the first and second stop element (62) run onto the associated supporting surface (50, 51) before the sealing jaw (37) and the opposite jaw (38) impact the tube (1) for pressing contact, and that the two supporting elements (48, 49) are subsequently moved toward one another to delay the motion component perpendicularly to the center plane of the sealing jaw (37) and of the opposite jaw (38) in a guided manner.