assembly causing the web to cover or in conjunction with other assemblies the area on the collection surface that would have been covered by the inoperative assembly in practice when one or more assemblies becomes inoperative other assemblies are adjusted and the trajectory paths of the webs from the adjusted assemblies offset the blemish that would otherwise result from the inoperative assemblies the speed of the collection belt may also need to be adjusted the assemblies and collection belt speed may be adjusted by a suitable computer control fig1 and 3 combine to show a preferred embodiment of the invention the assembly 10 consists of a stationary frame 11 on which is mounted a pivot plate 12 on which is mounted a baffle 20 which may be rotated by drive motor 21 shown only in fig3 an annular target plate 26 is also mounted on pivot plate 12 attached to the pivot plate is curved vee rail 13 resting on and engaging rollers 15 and 16 which are mounted on stationary frame 11 as is guide roller 14 resting on and engaging the top of the vee rail the pivot plate pivots around point a as shown in fig2 and 3 and is positioned by rack 17 in conjunction with pinion 18 which is rotated by motor 19 alternatively the pivot plate could be pivoted.