The ornamental design for a vacuumsealingappliance, as shown and described.
1. Vacuum sealing appliance
1.1 : Front and top perspective view
1.2 : Back and top perspective view
1.3 : Front and bottom perspective view
1.4 : Front
1.5 : Back
1.6 : Right
1.7 : Top
1.8 : Left
1.9 : Bottom
The broken lines in the drawings show unclaimed environment only and form no part of the claimed design; the thin lines in the drawings illustrate the shapes of the three-dimensional surface.