Abstract: An adjustable nudger roll for use in a friction retard feeder includes multiple springs used in conjunction with the nudger roll in order to allow greater latitude for adjustment of the normal force of the nudger roll against a substrate stack and in order to reduce the incidence of misfeeds. This arrangement adjusts the normal force on substrates as the requirement of the feed force changes and thereby reduces misfeeds and multifeeds.

Abstract: A variable sheet sized sheet feeder adapted to be reloaded while running in a dual tray mode. A dual tray sheet feeder having a sheet transport to reload a stack of sheets from a holding station to an active feed station is provided. The dual tray design allows the holding station to be reloaded while the active tray is feeding thereby providing load while run capability. The feed tray is further provided with tray extensions to allow the loading and feeding of oversized sheets within the same confines. Multiple sensors and movable stack guides are provided to allow the transfer of the sheet stack from one tray to another and to report the status of each tray to the operator through a user interface.

Abstract: An apparatus to detect sheet misfeeds and jams in an electrophotographic printing machine by measuring the tangential reaction force of a sheet entering the nip between two drive rolls and comparing the measured force with preprogrammed parameters within the machine controller. In the event the force measured does not fall within the programmed parameters, the drive motor controller and machine controller can take appropriate corrective action to display an error message, lessen sheet damage and prevent machine damage. A force library can be compiled to predict drive roll wear and failure so as to allow preventative measures to be taken.

Abstract: An improved process and apparatus for reducing NO.sub.x content of flue gas effluent from a furnace, the improvement comprising a burner assembly having a burner and flue gas recirculating system for collecting and passing internally recirculating flue gas into a combustion zone for reaction with a combustion flame. The burner preferably has a plurality of fuel dispensing nozzles peripherally disposed about the combustion zone to aspirate collected internally recirculating flue gas into the combustion zone, and has a plurality of fluid driven eductors to drive further amounts of collected internally recirculating flue gas into the combustion zone.

Abstract: A sheet path velocity profile signature analysis apparatus which utilizes output from various idler rolls throughout the machine paper path to detect abnormalities. The constantly monitored and instantaneous velocity readings are compared with a base line velocity signature established at the factory. If the constantly monitored velocity profile is not within the pre-established operating parameters as set at the factory, automatic machine adjustment procedures are initiated and/or automatic service alerts are issued. The ability to constantly monitor the velocity profile throughout the machine enables preventative maintenance to occur and worn drive rolls, idler rolls and other transport devices can be replaced before catastrophic failure.

Abstract: In an electrophotographic printing apparatus having a fuser roll and a second roll forming a nip therebetween for the passage of a copy sheet therethrough, each copy sheet is inserted through the nip so that at least one edge of the copy sheet is skewed relative to the direction of motion of the fuser roll.

Abstract: A magnetic clutch provides an adjustable slip torque. A housing, having an outer surface of a predetermined frictional coefficient, is disposed around a portion of a shaft, and is rotatable relative to the shaft An outer magnetic member is disposed on the inner surface of the housing, and an inner magnetic member is attached to the shaft and disposed within the housing. The slip torque is adjusted by varying the amount of surface area exposure between the inner magnetic member and the outer magnetic member.

Abstract: A hydrid nudger roll for use in a friction retard feeder includes alternating elastomeric and studded rolls positioned on a support shaft. The outer surface of the elastomeric rolls extends beyond the tips of the studded rolls, but when the elastomeric rolls are deformed against a stack of sheets due to normal force, the tips of the studded rolls extends beyond the outer surface of the elastomeric rolls.

Abstract: An improved process and apparatus for reducing NO.sub.x content of flue gas effluent from a furnace, the improvement comprising a burner assembly having a burner and flue gas recirculating system for collecting and passing internally recirculating flue gas into a combustion zone for reaction with a combustion flame. The burner preferably has a plurality of fuel dispensing nozzles peripherally disposed about the combustion zone to aspirate collected internally recirculating flue gas into the combustion zone, and has a plurality of fluid driven eductors to drive further amounts of collected internally recirculating flue gas into the combustion zone.

Abstract: The invention includes a sheet feeding apparatus having a sheet pocket with a first end and a second end, rollers spaced a predetermined distance from the first end and including a plurality of sheet-feeder nips, one of the nips being an inlet nip for directing a sheet into the first end of the sheet pocket, and at least one other of the nips being an exit nip for directing a sheet out of the first end of the sheet pocket, and bypass rollers for selectively permitting a sheet to exit the sheet pocket via the second end thereof.

Abstract: A copy machine of the present invention may include a photoreceptor for storing a document image, a transfer station for transferring a stored document image to a sheet of copy paper at a transfer location, a supply tray for storing a quantity of copy sheets, transport rollers for conveyiong copy sheets along a path from the supply tray to the transfer location, a detector for detecting a misfeed in the path and for outputting a misfeed signal, and a controller for preventing an image on the photoreceptor from entering the transfer location upon receipt of the misfeed signal.

Abstract: An improved process and apparatus for reducing NO.sub.x content of flue gas effluent from a furnace, the improvement comprising a burner assembly having a burner and flue gas recirculating system for collecting and passing internally recirculating flue gas into a combustion zone for reaction with a combustion flame. The burner preferably has a plurality of fuel dispensing nozzles peripherally disposed about the combustion zone to aspirate collected internally recirculating flue gas into the combustion zone, and has a plurality of fluid driven eductors to drive further amounts of collected internally recirculating flue gas into the combustion zone.