Abstract: Manually and electrically powered die cutting machines for making paper cutouts with replaceable dies. A generally cubicle platen cutting head preferably mounted on a supporting cabinet comprises a rigid, supporting base with a pair of outwardly projecting, parallel side plates that surround a pair of spaced apart platens. A stationary platen is fixed between the sides. A movable platen is laterally suspended between the sides away from the fixed platen, defining a die-receptive compartment therebetween. A die selected to produce the desired shape, and the paper to be cut, are inserted within the die-receptive compartment in sandwiched relation before platen compression. The movable platen is suspended by pins projecting laterally away from its edges that engage suitable follower slots defined in the side plates. A crankshaft assembly pivots an elongated, roller-equipped crankshaft to displace the movable platen for cutting.

Abstract: A semi-automatic hand-held pneumatic gun for installing plastic rivets. The gun includes a handle equipped with a manual trigger, and an associated magazine which serially feeds a plurality of stored rivets. Repetitive semi-automatic cycling of the gun is established by cooperation between a triggered air system, an intermediate pneumatic system, and a pneumatic barrel assembly. The trigger valve establishes a plurality of pneumatic pathways between it a manifold and the intermediate pneumatic system, activating first and second intermediate valves disposed within the intermediate valve pneumatic chamber. The barrel chamber includes an elongated ram and an associated piston. When the trigger valve is in a rest position, a pneumatic path is established whereby the first intermediate valve is biased to a rest position establishing another pneumatic path biasing the piston to a rest position.

Abstract: A method of forging a solid flanged head on a hollow steel tube by positioning a cylindrical steel plug within a steel tube of the same grade, and extending said positioned cylindrical plug beyond the end of the tube, thereafter heating the end of the tube and plug beyond the critical temperature of the steel material, and thereafter forging the softened material so that a solid steel head is formed which extends beyond the continuous wall of the steel tube.