section to pass into an adjacent lower section and an inoperative position where they are at least partially removed from chamber 11 and web material in one section is free to pass into the adjacent lower section referring now to fig3 the arrangement including the lost motion connection for mounting lever arms 26 on shaft 28 is shown two collars secured to shaft 28 designated 30 and 32 respectively prevent sideway movement of lever arm 26 on shaft 28 the collar 30 has a laterally extending pin 34 attached thereto which extends parallel to and is spaced apart from shaft 28 and which extends into an oversized hole 36 in lever arm 26 the difference in size between pin 34 and hole 36 allows for lost motion such as a small amount of rotation of shaft 28 without movement of lever arm 26 this small amount of rotation allows one of a group of fingers 24 to remain in an inoperative position when web material is between the end or tip of the finger and the front 14 of box 10 such lost motion also allows a web convolution which remains above a finger 24 following a dumping operation to be explained hereinafter to move the finger to its inoperative position when the web convolution is pulled so that the web convolution can freely pass into the section below the finger pivotal upward movement of a lever arm 40 secured to shaft 28 in the direction of arrow a as shown in fig2 rotates shaft 28 and collars 30 and 32.