Abstract: An expanding cone for securing to a reel includes an inner funnel shaped core with a wide end at a base attachable to a support shaft and tapering outwardly from the base. An enclosing body around the core having a plurality of windows. A respective blade at the core below each window and movable outwardly through the window to engage the interior of the mandrel upon the enclosing body moving toward the base of the core. A spring normally biasing the enclosing body off the core away from the base of the core. A pawl pivotally supported to the core engaging the collar of the enclosing body for preventing the enclosing body from being urged toward the base of the core by the installed mandrel. A lever movable to lift the pawl off the collar as the mandrel is installed on the enclosing body until the collar is free to be moved toward the base of the core.

Abstract: A braking system for bobbin holders for holding a bobbin. A closed oleo-hydraulic circuit adapted to increase the flow of oleo-hydraulic fluid to two connected fluid gear pumps and reduction units. The increased fluid pressure to the gear pumps brake rotation of the bobbin-holders as the inertial racing of the bobbin increases, e.g. with the unwinding of sheet material on the bobbin. The oleo-hydraulic circuit includes a pressure regulator and a solenoid valve for transmitting oleo-hydraulic fluid contained in a tank through the oleo-hydraulic circuit past both gear pumps.

Abstract: A fluid distribution device having a circuit including a first and a second duct between a common inlet and a common outlet. A third duct to the first duct and a fourth duct to the second duct. A one-way valve at each side of the connections from the third and fourth ducts to the first and second ducts enables flow from the inlet into each of the third and fourth ducts, but prohibits flow from the third and fourth ducts back to the inlet and only permits the latter flow out of the outlet. Various valves at the inlet and the outlet control pressure. A return path from the outlet to the inlet has a cooler in it. A reservoir supplies fluid.