is then able to pass the equalizing device when the roller 34 has been lowered by that amount fig2 shows in a very schematical manner a side elevation of another embodiment of the equalizing device the two equalizing rollers 32 and 34 the latter being coated by a rubber layer 35 have their axes in a horizontal plane the control motor 36 adjusts the thickness of the nip 41 by a horizontal displacement of the roller 34 so that no measures will be necessary to neutralize the weight of this roller finally fig3 shows also schematically an embodiment of a roller free equalizing slit the slit is formed between an elongated stationary shaped part 32a and another shaped part 34a which is however pivotable around the axis 39 the operating surface of the shaped part 34a coming into contact with the material web 20 is coated with a rubber layer all surfaces coming into contact with the web 20 are finally coated with an antifrictional layer the equalizing slit is formed in the lower portion of the shaped parts 32a 34a for the control device 36 see the description above fig4 shows schematically in side elevation a preferred applicator unit 22 namely the already mentioned metering roller application device the metering roller application device used here is another invention of the applicants and disclosed in all details in u.