Roll type sheet material feeding apparatus

In a roll type feeding apparatus enclosed within a housing and including indexing drive means having an input shaft rotated continuously and an output shaft rotated intermittently in one rotating direction, a main roll mounted on said output shaft to be rotated together with said output shaft, and an auxiliary roll adapted to cooperate with said main roll thereby to feed a sheet material in a state clamped between said main roll and said auxiliary roll, the improvement comprising a pair of supporting panels, means for pivotally mounting each panel, at one end thereof, to the housing so as to be swingable in a direction orthogonal to the axis of said main roll and adapted to swing said auxiliary roll toward or away from said main roll in dependence on the swinging movement of said supporting panels, adjusting means for adjusting the swinging movement of said auxiliary roll, said adjusting means including spring means for biasing said supporting panels so that said auxiliary roll is urged to move toward said main roll, and a cam rod rotatably supported in said housing and connected to both of said paired supporting panels thereby to displace angularly said supporting panels simultaneously against the urging direction of said biasing spring means upon rotation of said cam rod.