Abstract: A penetrating oil including isoalkane solvent and oil derived from biological sources and a method for producing the same, are disclosed. Use of a composition containing isoalkane solvent and oil derived from biological sources is further disclosed.

Abstract: An apparatus for packaging article goods, such as paper goods, forming a stack comprises a conveyor adapted to carry a continuous stack formed by identical individual articles, such as envelopes, and a displacer device located along one side of the stack advancing path and provided with a detector for a count article constituted by one of identical articles and protruding from the stack. A separator element is adapted to penetrate into the stack for producing a gap between a stack portion to be separated first from the stack and the rest of the stack. The apparatus also includes a pusher element which is located at the front of the separator element in the advancing direction of the conveyor and is adapted to move across the stack advancing path for displacing the stack portion to a further processing unit located along the other side of the advancing path. The separator element is aligned with a gripper which is adapted to clasp the protruding count article and then release it to be left in the stack.