Patent ID: 6918733

Claim:
A hold down clamp for a stack of a sheet material carried on a transportation trolley for selective operative association with a printing machine, comprising: a holding arm ( 6 ) adjustable along an upright guide member ( 7 ), said holding arm extending substantially horizontally at its distal end and having, in the area of its distal end, a contact member ( 8 ) mounted for lowering down on the top sheet of the sheet material, said contact member ( 8 ) at least partly elastically pliable under the return force on engagement with the stack ( 2 ), said holding arm including a locking device ( 17 ) so as to be selectively lockable to, and releasable from, said upright guide member ( 7 ), said holding arm ( 6 ) having at least one release member ( 19 ) operatively associated with said locking device ( 17 ), said at least one release member ( 19 ) being movable in the direction parallel to said guide member away from the stack ( 2 ), for moving said locking device relative to said guide member to release said locking device from said guide member.