An apparatus and a method for duplex printing are disclosed. The apparatus includes a print zone where printing is performed and a duplex module configured to change the orientation of the media sheet. The duplex module is positioned so as to receive the media sheet from the print zone, trailing edge first. The method includes feeding a media sheet to the print zone and printing swaths of ink dots on a first side of the media sheet. Black ink density is calculated for each swath containing black...

Provided is a duplex printer and method of duplex printing. The duplex printer and method of printing includes a paper feeding belt that is vertically installed to form a first vertical surface; a photosensitive drum that is installed to contact the first vertical surface; and a transfer roller that is installed to contact an other surface of the first vertical surface contacting the photosensitive drum to transfer a toner image from the photosensitive drum onto a sheet of paper, which is suppli...

A duplex projectile to be fired from a gun bore is made up of a tubular pectile and a conical shaped projectile fastened within the tubular projectile by means which are capable of withstanding acceleration forces on the round while the round is within the bore after being fired but which release the conical projectile from the tubular projectile once the two exit from the bore.

A receptacle, such as one for a duplex electrical outlet, includes a grounding plate facilitating ready grounding of the receptacle. A conventional ground screw is provided at one end of the receptacle and the grounding plate abuts the receptacle housing and has an opening therein for receipt of the ground screw, and a contoured surface extending away from the opening and for operatively engaging a ground object. The ground object may comprise a face plate for the receptacle, the grounding plate...

A duplex lock codable by a master key and releasable by a duplex key and comprising a first fixed hollow cylindrical body in which a second cylindrical body is rotatably mounted. An axially shiftable slider is firmly secured to the second cylindrical body for locking it relative to the first cylindrical body by insertion in a cavity provided at the bottom of the first cylindrical body. When the slider is withdrawn, the two cylindrical bodies are released. The slider is provided with a plurality ...

A method and apparatus for forming a laminated bifocal lens which includes forming a frontal lens component having a bifocal element in a substantially stress-free manner and bonding the frontal lens component to a rear lens component which is also formed in a substantially stress-free manner. The laminated lens so provided may be inexpensively formed, is lightweight, and has optimum optical and physical characteristics.

A duplex electrical connector having a housing and an insert in the housing that provides two inbound end apertures that conduct two armored cables to and through a single outbound end aperture. The duplex electrical connector incorporates snap in spring steel retainers to provide a connector that allows rapid and simplified installation of a pair of armored cables into a single junction box outlet. The outbound end of the duplex connector preferably has a smooth outer cylindrical section and in...

A duplex conveyor includes two generally parallel longitudinal profiles adapted to support a conveyor thereupon with each profile including an upright stem, a leg projecting generally transversely from an inner side of each upright stem and carrying a vertical clamping bar, and a retainhing strip projecting generally transversely from an outer side of each upright stem. Each retaining strip has an exterior longitudinally inclined surface disposed in inclined relationship to a longitudinal plane ...

This duplex receptacle will be factory installed in its own enclosure and sealed to provide safety and quick mounting. Both outlets can be constantly powered or one of the outlets can be wired for constant power and the other outlet controlled by a switch. Both applications can be performed by the internal bussing of the duplex receptacle and a cam within the receptacle housing. At installation, the installer will set the cam on the back of the receptacle according to the application desired.

A duplex system has duplicated processor devices. Each of the processor devices has a first copying section which writes data written in a memory of the processor device, into a same address of a memory of the other processor device, a second copying section which divides all data in the memory of the processor device to sequentially write all data into the memory of the other processor device periodically, an error detecting section which checks the data written in the memory of the processor d...