Abstract: A sheet feeder for corrugated paperboard sheets utilizing timed intermittently rotatable belts against which either the top or bottom sheet, depending on the configuration chosen, of a stack is brought into contact to feed such sheet in synchronism with adjacent processing machinery and utilizing continuously applied negative atmospheric pressure to hold such sheet against the belts without the need for valving or otherwise breaking the suction pressure.

Abstract: A stripping device for removing waste sheet material from the vicinity of a cutter. In one embodiment, a plurality of pins are mounted to a rotatable drum positioned adjacent a rotary steel cutting die. The die includes knives for cutting a sheet of material into a desired configuration with the waste portion of the sheet remaining wedged on the die. The stripper pins pierce and lift the waste portion of the sheet away from the die. In lieu of a drum, a plurality of hubs mounted to a common shaft may be provided having the stripping pins mounted thereon. In another embodiment, the stripping pins are mounted directly to the rotary cutter. A cam-actuated lever mounted to the rotary cutter is operable to eject the waste sheet portion from the stripping pins.

Abstract: A belt type box blank folding machine including bar folder assemblies on a downstream end thereof for engaging partially folded substantially upstanding outer panels on the blanks and folding them downward against inner panels of the blanks. The bar folders are arranged to pivot from an upright position, in engagement with the upstanding panels, to a horizontal position and to simultaneously reciprocate along the path of blank travel to provide maximum engagement with the outer panels during folding thereof. The bar folders are parallel with the fold line of the outer panels during folding thereby preventing twisting of the panels and locking of the leading flaps of the outer panels against the inner panels.

Abstract: Rotary slitting apparatus for slitting paperboard material including a pair of coacting knife holders for mounting on parallel adjacent rotatable shafts, such holders having thin flexible annular slitting blades clamped thereon at a slight angle to a plane normal to the axis of the shafts so that the blades overlap slightly to provide scissors-action cutting of paperboard material passed between the heads.

Abstract: A method and apparatus for extending the useful life of resilient covers on anvil rolls of rotary die cutters by causing the die cutting rules to penetrate the covers at sequential incrementally small circumferentially spaced locations around the cover by adding to the speed of rotation of the anvil roll relative to the speed of the die holder roll. Lateral reciprocation of the anvil roll is translated to rotary motion by a gear and pivot lever arrangement, such rotary motion being added to the normal speed of the anvil roll.

Abstract: A method and apparatus for detecting jam-ups of serially advancing blanks of which the method comprises storing a number corresponding to the length of the blanks in predetermined increments, detecting a leading edge of such blanks, actuating a control means by the detection of the leading edges which generates a digit corresponding to the predetermined increments, detecting a trailing edge of such blanks to deactuate the control means, comparing the stored number with the digits generated by the control means, and stopping the blanks when the number of digits exceeds the stored number.

Abstract: An electrostatic precipitator for cleaning a particle laden gas passing therethrough comprising a shell having a gas inlet and outlet port and defining a gas chamber therein, a plurality of laterally spaced collector electrodes suspended within the gas chamber defining gas passages between adjacent collector electrodes, a discharge electrode assembly suspended from an insulator within the gas chamber, a portion thereof suspended within the gas passages between the adjacent collector electrodes, the discharge electrode assembly being insulated by the insulator from the shell and the collector electrodes, and a plurality of electrically insulating stabilizers connected between selected ones of the collector electrodes and the discharge electrode assembly for maintaining the portion of the discharge electrode assembly suspended within the gas passages substantially centered between the adjacent collector electrodes.

Abstract: An oil ring assembly for internal combustion engine pistons including an annular split piston ring with an inner circumferential groove, a radially expandable split annular spring in the groove, and a bridging means in the groove spanning the gap between opposite ends of the piston ring. The spring is preferably a coil spring and the bridging means is preferably a cylindrical arcuate segment located between opposite ends of the spring with pins on each end extending inside the coils of the spring. Alternatively, the arcuate segment may be formed from a tightly wound coil spring. A second enbodiment utilizes a serpentine expander as the spring and the bridging means comprises a flat arcuate segment located in a notch in the expander adjacent the gap in the piston ring.

Abstract: A permanently sealed gear coupling for connecting a pair of substantially coaxially aligned rotatable shafts comprising a hub connected to each of the rotatable shafts, each of the hubs including outwardly extending spur gear teeth projecting from a portion of the outer surface thereof; a sleeve surrounding and radially spaced from each of the hubs, the sleeve having inwardly extending spur gear teeth in meshing engagement with the outwardly extending gear teeth on each hub; and permanently mounted sealing rings for retaining lubricant in spaces between the hubs and the sleeve for lubricating the meshing gear teeth.

Abstract: Herein disclosed is an apparatus for changing the rotary position of a slotter member and for changing the relative position between fixed and movable knives mounted on the slotter member.

Abstract: An electrostatic precipitator for cleaning a gas flowing therethrough comprising a shell having a gas inlet and outlet port and defining a gas chamber therein. Sets of spaced collector electrodes are suspended within the shell, the collector electrodes defining gas passages therebetween. Discharge electrodes are suspended within the gas passages for ionizing particles in the gas for collection by the collector electrodes. Hoppers are suspended below the collector electrodes for collecting the particles dislodged from the collector electrodes, each of the hoppers being suspended beneath at least two of the sets of collector electrodes.

Abstract: A bearing member such as a piston ring for internal combustion engines having a wear resistant alloy coating applied to its wear surface by plasma spraying an aggregate mixture of particles thereon. The mixture is made by first alloying carbon, silicon, chromium, nickel, iron, and boron together to form intermetallic brazing and binding alloy particles and by alloying substantially 75% cobalt and 25% molybdenum to form cobalt-molybdenum alloy particles, for mixing with individual particles of pure molybdenum. These three different particles form the aggregate mixture to be sprayed on the bearing surface.

Abstract: A method of stacking corrugated paperboard blanks issuing from a corrugator that produces parallel streams of blanks from an advancing endless web by shingling the blanks from each of the streams and advancing them to lineally displaced stacking stations where a predetermined number of blanks are accumulated and then interrupting the flows of blanks for removing stacks of blanks from the stacking stations. Suitable apparatus for performing the method includes vertically displaced, parallel shingling conveyors which advance the shingled blanks to lineally displaced stacking platforms and a gating apparatus at the downstream end of each conveyor to interrupt the flow of blanks while the stacks are removed from the platforms. The output end of the lower conveyor rises to compensate for the increasing height of the stack on its associated platform while the other platform falls to similarly compensate for the increasing height of the stack thereon.

Abstract: The invention comprises bearing members having a coated wear surface applied by plasma-spraying an aggregate of particles thereon consisting of nickel-aluminum particles, nickel-molybdenum particles, tungsten carbide particles, and intermetallic alloy particles to form a high temperature, oxidation resistant, wear resistant, and scuff resistant coating. Alloying of the constituents in the final coating is desired and is achieved by encapsulating both the aluminum and molybdenum particles with nickel (alternatively the nickel-aluminum may be in the form of a bonded aggregate), by sintering the tungsten carbide in a matrix of cobalt, and by alloying nickel-cobalt, carbon, silicon, chromium, boron, and iron into an intermetallic alloy to form an aggregate of four types of particles for plasma-spraying onto the wear surface.