Abstract: The present invention consists of a safe and arming apparatus and method that generates a magnetic field across a portion of the munition. The magnetic field provides a signal of arming data which is read by the safe and arming device in the munition. This signal is used with the velocity of the munition, after firing, to set the arming delay or the munition.

Abstract: A device for allowing a 25 mm or similar gun to be cycled through its automatic or semi-automatic mode without live ammunition and without interrupting each cycle because of a misfire. The device is entirely electric and requires no mechanical attachments to the gun and no adjustments of the gun. The device is portable and can be quickly and easily connected to and disconnected from the gun. The device uses signals from a source of gun control signals to develop a sear solenoid voltage which simulates signals developed by gun recoil caused by live ammunition. The simulated signals enable the gun to operate without stopping due to a misfire.

Abstract: For supplying a cartridge belt comprising individual, separable belt members from a magazine to a machine gun, a guide channel is provided which has an outwardly pivotable channel portion. The channel portion can be pivoted between a position aligned with the guide channel and a position aligned with a replacement ammunition channel, a pivoting device being provided which separate the two belt members located in the partial channel between the channel portion and the machine gun and connects same to a belt member in the replacement ammunition channel, so that without manual activity it is possible to fill an ammunition magazine and after pivoting back the channel portion the filled belt can be joined to the belt located above the separating point.

Abstract: A lightweight military vehicle is provided with an unmanned turret for interchangeably supporting large weapon stations. Elastomer filled stanchions connected to a turret platform serve to isolate weapon impulse forces from the vehicle frame. Driver, commander and gunner seats are located externally to the turret and provided with said doors to enable quick exiting. Both powered and manual backup drives are external to the rotating turret disk and are accessible from the gunner's seat. The elevation drive employs a ball and socket joint connecting an upper yoke mounted to the weapon with a fixed lower portion controlling vertical movement of the yoke and thereby the elevation of the gun.

Abstract: A variable height column having a base, a midsection and an upper section. The base includes at least one upwardly extending guide shaft and the upper section includes at least one downwardly extending guide shaft. The midsection includes guide paths and bearings dimensioned for sliding engagement with the guide shaft. Hydraulic actuating means are provided to move the midsection vertically relative to the base and to move the upper section vertically relative to the midsection at the same rate to permit the uniform straightline extension and retraction of the column.

Abstract: An air distribution system, particularly for automobiles, in which the depth of the unit is relatively short and in which control over the direction of air flow can be achieved by movement of an element in a plane orthogonal to the direction of air flow. A main air flow outlet is formed in a wall member and a parallel flow path is formed adjacent the outlet and has diverging walls which are relatively short so that there is no wall attachment or coanda effects per se. Flow of fluid through the adjacent parallel flow path exits through an opening that directs the air in a direction generally parallel to the short wall direction of the adjacent flow path. By controlling the entry of air into the parallel flow path, the main air flow vector is deflected and the direction of flow is thereby controlled. The deflection is greater when an obstacle slightly intrudes the side of the outlet opposite the parallel flow path.

Abstract: A ventilating duct system including a plurality of ducts are disposed about an oven door on the face of an oven. Each duct includes a plurality of spaced openings to allow cool air from a source of cool air to be directed about the oven door. A first air feed duct extends from a distribution box to one corner of the duct system to direct cool air into a pair of ducts that meet and are connected at that corner. A second air feed duct is similarly connected to the other pair of ducts and to the distribution box. An infeed duct directs air to the distribution box. If desired, a control duct can be disposed in each of the ventilating ducts. The control ducts would be connected to the distribution box to receive the cool air therefrom and would be formed with spaced openings and would be movable from a position with its openings aligned with the openings in the ventilating ducts to facilitate the flow of cool air therefrom to positions out of alignment therewith.

Abstract: Within the vent system of an air conditioning unit or the heating system at least one flap is pivotably mounted such as to be moveable between a closed position blocking flow through the conditioned air vent, and an open position allowing conditioned air to pass through the vent and into one or more rooms to be serviced by the conditioned air. One or more stops are provided to cease pivotable movement of the flap when the open position is reached. Preferably more than one flap is utilized. Preferably gravity is utilized to bias the flap into the closed position so that when the heating or air conditioning blower is turned off the flap will return to the closed position. The flap is also moveable manually between the open and closed positions, thereby a room or rooms which are not to be heated or cooled may be blocked off from the air conditioning or heating system by the manual closing of the flap.

Abstract: A novel and improved cover assembly for an air moving device such as a fan or air conditioner mounted in a wall or ceiling for drawing air therethrough. To prevent cold air from leaking through the device, the improved cover assembly is detachably connected by magnetic means to the rim of the device. The cover assembly is made of insulating material and has a plurality of recesses or channels formed on the internal side thereof extending in spaced relation to each other from the outer edge of each of the inner recesses so that a wide range of rims can be served by one size cover assembly. Depending on the rim size or shape (rectangular, square or circular) the cover assembly can be "fitted" to any rim in question by removing the excess material at the appropriate line of perforations.

Abstract: A cooker for continuous grilling of hamburger patties and the like uses a shiftable grid which intermittently lifts the patties off a stationary grid and effects advancement after each lift-off until a U-shaped path is traversed extending initially through and terminating beyond one end of the cooker exteriorly thereof. The patties travel upwardly along a straight line with respect to a first pair of legs of the grids and then upwardly and arcuately with respect to a pair of first grid quadrants, whereupon they invert and drop such as to travel upwardly and arcuately with respect to a pair of second grid quadrants. Finally, the patties travel upwardly along a straight line with respect to a pair of legs of the grids forming the final stretch of the travel.

Abstract: A method of and an apparatus for producing boiled eggs uniformly heats and solidifies each of the eggs. As the heating means, infrared and/or far infrared rays is adopted. The eggs are supported by pairs of conveyor rolls having recesses. The respective pairs of conveyor rolls are rotated in the same rotating directions, whereby the eggs supported thereon are turned about the axes thereof, so that the whole surfaces of the eggs can be uniformly irradiated by the infrared and/or the far infrared rays.

Abstract: A pressure smoker having a stainless steel cooking vessel including a smoke generating cavity, the cooking vessel being heated by electric heating elements positioned to heat the walls of the vessel while creating a cool area at the bottom of the vessel, the smoke generating cavity having a separate heating element, the controls for the smoker including separate controls for the heating elements for the vessel and the heating element for the smoke generating cavity, and pressure responsive valves to control both heat and pressure within the cooking vessel.

Abstract: A supporting frame includes a pair of press bars adjustable fore and aft and being positionable in an upper or lower position relative to the frame. A hydraulic press head assembly is supported above the press bars and is manually operable to engage a work piece supported by the press bars. The hydraulic press head assembly includes a manually operated pump, a release valve, a relief valve and an oil reservoir all supported upon the upper end of a press frame. The entire assembly is designed to be supported on a conventional work bench or on its own work bench as desired.

Abstract: An embossing system is disclosed for embossing cards with characters of at least two pitches. A number of embossers equal to the number of lines of characters to be embossed on the card are positioned in line. Each embosser is dedicated to the embossing of a particular line of characters with a particular pitch. A common transport belt conveys the cards from an input hopper past the embossing stations of each of the in line embossers to a wait station. During embossing, the transport belt is moved from the current longitudinal position to the longitudinal position where the closest next character(s) are to be embossed by any one of the embossers. The embossed cards are conveyed from the wait station to a topper which applies topping to the embossed characters.

Abstract: A matrix line printer which includes a shuttle-carrier mounted in a frame for limited reciprocating movement and supporting a plurality of print elements; a plurality of rollers are journalled in the frame and arranged parallel to the direction of reciprocating movement of the shuttle, projections on the shuttle engage the rollers; a pair of circularly round, cylindrical guide pins are arranged in coaxial relation to each other and mounted to respective opposite ends of the shuttle, run in a pair of corresponding sleeve-like bearings; leaf springs on the shuttle urge the projection against the rollers; and additional springs are arranged transversely to the coaxial alignment of said pins for balancing purposes.

Abstract: A serial impact printer including a novel hammer mechanism for applying a printing force against a character element to drive it in sequence against a marking medium, a mark receiving support, such as a sheet of paper, and the print line on a platen. The hammer mechanism delivers its impact force against a character element along a line forming an angle with a line normal to the surface of the platen at the point of contact of the character element with the platen. This arrangement enhances the ink release of single strike ribbons and multi-part carbon forms. By urging the hammer mechanism against the character element for an extended dwell time of at least 1 millisecond, which is substantially greater than that in conventional printers, the ink release of multi-strike ribbons, fabric ribbons and correctable ribbonsd may also be enhanced. By incorporating both the oblique impact and the extended dwell, the ink release characteristics of all conventional ribbons and multi-part forms will be enhanced.

Abstract: A method and device for removing spots from a printing plate of a printing machine having a moistening mechanism with an application roller and an immersion roller immersed in a container with a moistening agent and operated in contact with the application roller for application of a moistening agent to the printing plate, wherein the application roller is driven by a plate cylinder connected to the application roller in a form-locking manner, with an interposition of a switching coupling, so that a peripheral speed of the application roller in a coupled position is lower than that of the plate cylinder. The drive also includes a hydraulic cylinder connected by a scanner and a switch to an electric motor for driving the immersion roller.

Abstract: The present invention provides an automatic blanket wash system that recirculates a separable mix of water and solvent. The mix is selectively applied to the blanket cylinders by closing a pressure valve in the recirculation system return line and selectively opening valves to spray bars at the blankets. The pressure valve closing causes a pressure build up in the system for the spraying of the mix onto the blankets.

Abstract: The pole body for electric fuses comprises a homogeneous insulator in which a needle-shaped detonator pin is arranged normally to the plane of a metal layer which contacts a detonator charge on its opposite side. Due to the nearly point-shaped detonating bridge formed in the metal layer there occur, at the moment of detonation, very high current densities which cause melting of the detonating bridge. The pole body is manufactured from a glass tube surrounded by a metal tube. In order to prevent occlusion of gas in the insulator formed from the glass tube, a guiding body is placed upon the tip of the detonator pin which is part of a pole pin or of a pole cup during the melting operation. Preferably, the pole body is used in fuses with extremely short reaction times, for example, in ammunition, projectiles and the like.

Abstract: A shell formed of a casing having a propellant in it and a means of igniting the propellant, and shot formed of a plurality of metallic pellets each of a pyramid shape, that is, in the form of a polyhedron having a equilateral triangular base and equilateral faces meeting in a common apex. The pyramidal shape causes the pellets to travel in a flatter trajectory than spherical pellets commonly used so that when the shell is of the type used in a shotgun, the pellets have greater range, more directional stability, and are less affected by sidewinds.

Abstract: A cartridge with a frangible projectile, usable in an automatic or semi-automatic fire-arm, for instance a pistol, wherein the propellant gases are initially expanded to recoil the breech block and then further expanded to propel the frangible projectile without breaking the same until impact.

Abstract: Device for continuously controlling the clamping force in monocable ropew, comprising a test spring which acts against the pressure spring and which is arranged with the latter-mentioned in the pressure mechanism. A signal and/or stop device is responsive to a deformation of the test spring when a predetermined threshold magnitude of deformation has been exceeded.

Abstract: A low-level freight car for carrying trailers and containers at a low overall height combines a low center sill with relatively light side sill assemblies to provide a rigid structure having low deflection characteristics under the expected buff, draft and vertical load combinations, while keeping overall tare weight to reasonable levels and providing an adequate safety factor.

Abstract: Equipment for public transport vehicles and transit areas having on either side of a longitudinal passageway, symmetrical transverse rows of sitting seats, having an alternating orientation, sometimes facing and sometimes back to back. At least above two longitudinal sequences of sitting seats on the side of the longitudinal passageway are provided longitudinal lounger seats, at a rate of one lounger for two sitting seats, whereof the central bottom points bear on the seat backs coupled back to back and whereof the adjacent raised ends are extended on the curved inner roof area. Access to each central bottom point takes place by steps located on the other side of the longitudinal passageway and which face one another, in the sides common to the seat backs joined back to back.

Abstract: An assembly for securing a standard bridge plate to the upper deck of a railroad car arranged to carry automobiles on at least two levels, said railroad cars having a track member from which a sliding door is hung positioned adjacent the edge of the deck at the end of the railroad car comprises a fixed leaf secured to the surface of the deck and spaced gudgeons mounted to an end of said fixed leaf. A rotating leaf has spaced gudgeons mounted thereto for being positioned between the spaced gudgeons secured to the fixed leaf. Pins pass through the gudgeons and secure the leaves together such that the rotating leaf may be turned back onto the surface of the deck or may be rotated to bridge the track member from which the door is hung. The rotating leaf has an offset therein so that a portion of said rotating leaf extending away from the deck and beyond the track member is positioned downwardly of the top of said track member.

Abstract: A work table is disclosed having three end-to-end abutted sections joined by adjustable longitudinal bars for forming a rigid table from one or more of the respective sections. Four sets of adjustable bars extend longitudinally of the table and fit varying lengths of the table comprising from 1 to 3 sections of the abutted table members. The bars extend in parallel to the longitudinal length of the table, provide rigidity to the respective table sections as well as extend between the respective sections when one or more leaves are joined. Cross X-type legs are provided with a variable pivot. The variable pivots enables the crossover point of the legs to be varied so that the table may be disposed at various heights and inclinations about its longitudinal length. The legs are provided at their upper end with U-sectioned channels having locking wing nuts for keying at selected locations to the longitudinal bars.

Abstract: A blast supression device for use in explosive hardening in a relatively confined enclosed area. The device absorbs and dissipates the explosive force by utilizing a containment frame covered with overlapping multiple flexible resilient flaps that dissipate the explosive force by yielding during the blast within the device.

Abstract: The electronically controlled locking apparatus is used with a door such as a safe door, and enables the door to be released by either a mechanical combination lock or an electrical lock control circuit. The control circuit generates an output signal when a correct access code is entered by a user for causing a control linkage to release the door. Alternatively, the mechanical lock can also cause the control linkage to release the door by authorized personnel, in the event of either a control circuit malfunction, or the authorized user being unable to recall the access code. The circuit includes both a non-volatile and a volatile memory means for storing the access code, and a display device for providing a visual indication of the correct code within the protected area, so that the door can be unlocked with the mechanical lock, and then the access code for the electrical lock circuit can be viewed at the protected side of the door.

Abstract: Apparatus for feeding solid waste material to one or more chargers of the type for forcing solid waste material into a furnace or boiler. An elongated auger housing is mounted above the chargers and includes a plurality of openings along its length and for depositing solid waste material into hoppers of the chargers. An auger is supported in the housing and conveys solid waste from one end of the auger housing to the other. A supply conveyor is provided for carrying a continuous supply of solid waste material to one end of the auger housing from a supply container. A return conveyor is positioned adjacent a discharge end of the auger housing and returns excess waste material to the supply container.

Abstract: A seed drill has a hoe point operable to create a furrow and a fertilizer feed shank to apply fertilizer in the furrow. A seed tube is operatively positioned behind the hoe point and fertilizer feed shank within the furrow and is vertically adjustable relative to the fertilizer feed shank and hoe point. An adjustable hoe bed provides vertical movement of the hoe points and seed tubes relative to the main frame of the seed drill. An adjustable banding cup adaptor meters the feed of fertilizer to either the fertilizer feed shank or the seed tube. V-shaped packer wheels create V-shaped soil compaction which allows for water retention and plant protection.

Abstract: Apparatus is disclosed for processing workpieces prearranged within pallets in an automatic sewing machine system. The apparatus includes an automatic release of a pallet containing a sewn workpiece. The front of the pallet drops onto shock absorbing members located within inclined chutes. The chutes contain slides which allow the dropped pallet to slide downwardly following impact with the shock absorbing members. The chutes are mounted in such a manner that they may be easily removed from the automatic sewing machine system.

Abstract: A method of sewing along a marginal edge of a fabric piece wherein the fabric piece in a flat state is gripped between a stationary low friction surface and a movable high friction surface, so that movement of the high friction surface relative to the low friction surface will slide the fabric piece over the low friction surface, while maintained in the flat state. The fabric piece is gripped so that the marginal portion to be sewn is exposed, and as the fabric piece is moved over the low friction surface the marginal portion of the fabric piece is moved along a path through a sewing machine head so a sewing operation may be performed thereon.

Abstract: A sewing machine with a sensing device positioned ahead of a stitch-forming point, senses changes in the thickness of a material being fed by the sewing machine. In order to determine the difference in thickness, the sensing device has a pickup foot capable of vertical movement with a sensing surface that lies on the material adjacent the point the stitch is formed. A sensing lever is movably mounted on the pick-up foot with a sensing arm that lies on the material ahead of the sensing surface, a measuring member detects the relative movement between the pickup foot and the sensing lever.

Abstract: A method and apparatus is disclosed for making improved tufted buffing pads of varied density across the face surface thereof. The apparatus comprises a tufting machine for placing pile in a spiral or circular pattern on a backing pad to form the buffing pad. The backing pad is held by a rotatable and laterally-movable pad holder which is coupled to a programmable controller. An improved buffing pad of varying density is achieved by coupling a programmable computer to the programmable controller for varying the length of intermittent steps that the pad holder is laterally moved relating to the tufting machine. By proper programming, pile applied to the backing pad is maximized in a selected high-wear area of the buffing pad, and minimized in a selected low-wear area of the buffing pad.

Abstract: A method for constructing a large-scale marine structure, which comprises: providing, near a dock (2) of which at least one end faces the waters through a gate (6), a pond (5) having an end thereof facing the waters through another gate (6'); constructing in the dock (2) a plurality of blocks (1A, 1B) for the large-scale marine structure (1); towing out the plurality of blocks (1A, 1B) thus constructed from the dock (2) to the waters, and towing same into the pond (5); tack-welding together the plurality of blocks (1A, 1B) in the floating state in the pond (5); discharging water in the pond (5) to cause the plurality of blocks (1A, 1B) thus tack-welded together to land onto the bottom (5a) of the pond (5); and fully welding together the plurality of blocks (1A, 1B) tack-welded together to construct the large-scale marine structure (1).

Abstract: A boat lift for a berth having permanently positioned piles in pairs spaced apart a distance sufficient to permit the boat to be berthed thereat to move between the paired piles while in the water includes a cradle having fore and aft transverse members upon which the boat is supported out of the water, a first pair of such piles equipped with first sheaves, a second pair of such piles with second sheaves, a third pair of such piles positioned between the first and second pairs adjacent the second second pair, first and second beams carried by the inside and outside piles of the second and third piles, motor driven winch drums supported by the first and second beams, third sheaves carried by the first and second beams, first inside and outside cables reeved respectively from the first and second drums via the first and second sheaves forward to the inside and outside piles of the first pair to lift the fore transverse member of the cradle, and second inside and outside cables reeved from the winch drums via t

Abstract: A flex wing apparatus comprising a support, a mast coupled to the support and a sail. Battens are carried by the sail, and couplings join the leading edge of the battens to the mast so that the sail and battens can pivot about the mast. The battens can be resiliently deformed varying magnitudes to induce the desired chamber into the battens and the sail.

Abstract: A laterally extending hydrofoil wing is supported in pendulum fashion in a cutout section of a planar keel of a sailing vessel. The pendulum support, in combination with the distribution of mass in the swing wing attempts to maintain the plane of the wing, which is under the surface of a body of water in a position parallel to the surface of a body of water regardless of any rolling or heeling of the vessel. The wing is canted or tilted downwardly into the water in the fore direction of the vessel to plane deeper into the water. When the vessel attempts to roll about its fore and aft axis from its original upright position, the flow of water acting on the canted wing develops a large downward force on the wing and on the keel from which the wing is suspended. The downward force attempts to rotate the keel of the vessel about its fore and aft axis to restore the vessel to its upright position.

Abstract: A keel assembly for a sailboat, the keel assembly having wing-like appendages at the bottom of a fixed keel and having a rotatable flap located at the trailing edge of the fixed keel. The flap includes a cantilevered portion extending below the vertical portion of the keel. In operation, the flap is rotated a few degrees to one side or the other of the center line of the boat so as to create an asymmetrically shaped keel so that the keel and hull exhibit a high lift to drag ratio and efficient sailing performance.

Abstract: A fender surrounding a mooring body and comprising a weight-loaded structure suspended by flexible connecting members from a higher location of the mooring body, which connecting members according to the invention extend upwardly and towards each other towards a point at or adjacent to the vertical axis of the mooring body, such that upon impact by a vessel the fender is tilted and quickly generates a return force.

Abstract: An apparatus for repairing boat hulls comprising a rack mounted for rotation about a horizontal axis. A beam is cantilevered outwardly from the rack, and a hoist mechanism is mounted for travel on the beam. A boat resting on a trailer is moved partially within the rack and the hoist mechanism located on the cantilevered end of the beam elevates the boat from the trailer. The hoist mechanism is then moved along the beam to position the boat within the rack. A series of hull clamping braces that are connected to the rack are positioned in engagement with the hull and complement the shape of the hull. The boat is lowered onto the hull braces, and a series of upper clamping braces that are connected to the rack are brought into engagement with the upper surface of the hull to clamp the boat to the rack. In some cases, side clamping assemblies can also be used to clamp the sides of the hull to the rack. By rotating the rack, the hull can be inverted so repairs or modifications can be readily made on the hull.

Abstract: A pair of identical rigid arms are each pivotably attached at one end to a pair of identical brackets, one bracket attached to a boat and the other bracket attached to a dock, and an elongated helically wound spring is threaded on to each end of the arms to connect them together. The arms are held in place at the bracket by pins or rods which, particularly at the boat bracket, can be quickly and easily removed to free the boat.

Abstract: A negatively buoyant tether cable management apparatus for use with a remotely-operated underwater vehicle is disclosed. The apparatus includes a cable climbing assembly, a depth sensor and a controller coupled to the climbing assembly and formed to actuate the climbing assembly to climb the tether cable when the cable management apparatus has been lowered to a predetermined depth. The climbing assembly includes a pair of powered, ribbed belts which are wrapped at least partially around the periphery of the tether cable at an acute angle to the cable. As the tether cable is lowered further, the climbing assembly climbs to maintain the depth and passes the tether cable out below or beyond the climbing assembly to enable maneuvering of the remotely-operated underwater vehicle with respect to the negatively buoyant cable management apparatus.

Abstract: A single-tone inverted toroidal whistle for producing a uni-directional output of about 135 decibels at 100 feet on axis at a frequency of about 420 hertz. A hollow cylinder having a closed base end is combined with a toroidal body to provide an annular sound chamber the working length of which determines the wavelength of sound generated by passage of air or steam under pressure through an annular slit formed in the interior of the cylinder and impinging against a spaced tapered lip on the inner cylindrical wall of the toroidal body.

Abstract: An easily manipulable hand operable device for use in visualization of relative orientations for steering operations to a final azimuth orientation in homing of a fluid craft having an axis of symmetry and guidance system in making an approach in the homing. Three coaxial indicator discs are used.

Abstract: A sprinkle belt that is operable in a breading machine for coating food products with various kinds of flour type breading to insure that the top coating is evenly applied and relatively light rather than a heavy or clumpy coating as normally applied by present breading machines. As herein disclosed, the preferred embodiment of sprinkle belt comprises an endless wire mesh belt movably disposed in a breading machine of the type disclosed in the assignee's copending application entitled Breading Machine, Ser. No. 421,169 filed on Sept. 22, 1982 now U.S. Pat. No. 4,496,084, and which belt is operable to intercept the discharge of flour breading from the machine hopper as it falls toward food products passing therebelow to disperse said discharged breading into a cloud-like curtain that is substantially evenly and relatively lightly applied as a top coating to the food product.

Abstract: In the application of a volatile solvent to a plastic, roll-on label for a bottle, a large diameter solvent applicating roll is formed with small diameter gravure rolls that extend from the surface of the solvent applicating roll. The small diameter rolls are circumferentially spaced from each other a distance that is equal to the spacing between the leading edge and trailing edge of a plastic label carried on the surface of a transfer drum. The small gravure rolls are relatively rotatable with respect to the large roll and are supplied with solvent from behind within the large roll.

Abstract: An apparatus for applying a modifying ingredient to a mass of open-celled polyurethane foam includes the application of an excess of a liquid solution or dispersion of the modifying ingredient to the mass of foam. A fixed frame mounts a plurality of spaced, generally parallel lower backing rollers. A movable frame is mounted above the fixed frame and carries a plurality of spaced, generally parallel pressure rollers for movement toward and away from the backing rollers. A first adjustment device is provided for lowering the movable frame to move the pressure rollers toward the backing rollers, with the mass sandwiched therebetween. A plurality of second adjustment devices are spaced at locations about the rollers for adjusting the pressure between the backing rollers and the pressure rollers uniformly along the rollers both in a direction transversely to and in the direction of movement of the mass through the rollers.

Abstract: An apparatus for developing a latent magnetic image on a moving magnetic recording medium in which the image is always satisfactorily developed without excess toner particles yet using a simple mechanism. A developing magnet extends parallel to the surface of the recording medium, which is in the form of a magnetic drum. The direction of the magnetic field produced by the magnet at the point (line) of closest approach of the recording medium and magnet is the same as the direction of the magnetic field at boundaries between background regions and recorded image regions on the magnetic recording medium. A nonmagnetic rotating sleeve is positioned around the development magnet, and magnetic toner supplied to the outer surface of the sleeve.

Abstract: A developing device comprises a developer bearing member to form thereon a developer layer with carrier particles which attracts toner particles; a toner holding member which passes by the developer bearing member and faces the developer layer such that toner particles are received to form the toner layer on the toner holding member, and which passes a developing station; a DC voltage source for applying DC voltage between the developer bearing member and the toner holding member for separating toner particles only from the developer held on the developer bearing member and adsorbing it to the toner holding member; and an elastic blade to making contact and slide the toner particles held on the toner holding member.