Abstract: An apparatus for applying an adhesive padding to a tack strip substrate composed of the following elements: (a) a conveyor for conveying a substrate along an elongated path; (b) an arm disposed above the conveyor, pivotable about an axis, biased to a first position, disposed so that the arm comes in contact with the substrate as the substrate is being conveyed along the elongated path by the conveyor, and adapted to be moved from a first position to a second position when brought in contact with the substrate; (c) a feeding device, disposed over the conveyor, for feeding to the substrate along a first path an adhesive strip and removing a removable backing therefrom along a second path; (d) a cut-off device having a movable part for cutting said adhesive strip, the movable part adapted to be moved from a first position above the substrate to a second position below the substrate and biased to the first position; (e) an activator connected to the movable part of the cut-off device and adapted to momentarily mo