An improved duplex reproduction system which produces duplex copy sets in collated separated stacks from a stack of precollated documents. The system includes a document feeding apparatus which feeds a stack of documents one by one onto the platen of a copy processor for producing copies of each document. The copy sheets are transported to a receiving tray in a sorting apparatus which does not sort the copy sheets when producing the first side of the duplex copies. The documents are reloaded int...

An anodized aluminum coating is sealed by a duplex process that comprises immersing the coating in a solution containing a divalent metal cation such as iron, cobalt or nickel followed by immersing the coating in a solution containing a multivalent anion such as phosphate, silicate, molybdate or chromate. The resulting seal imparts greatly improved corrosion resistance to the coating.

A duplex stainless steel having a good combination of hot workability, corrosion resistance and cold formability, said duplex stainless steel consisting essentially of, in weight percent, carbon 0.12 max., nitrogen 0.12 max., manganese 8 to 16, silicon 1.0 max., nickel 1.0 max., chromium 15 to 20, molybdenum 0.6 to 2.0, carbon + nitrogen 0.06 to 0.14 and the balance iron, the chromium equivalent of 13.5 to 16.0 in accordance with the formula: Chromium equivalent in percent = %Cr + %Si + %Mo - %N...

Rhodium plated articles are given superior wear qualities by providing an undercoating of a tin-nickel alloy. The invention is particularly applicable to metallic discs having a magnetic coating on the discs.

A combustible cartridge case for use with a fully telescoped round of ammunition wherein the case is of a laminated type construction with a cylindrical molded grain propellant sandwiched between a double wall combustible case of felted nitrocellulose thereby adding considerable physical strength to the cartridge. A supplementary cylindrical charge of molded propellant is positioned in the rear portion of the case surrounding the outer wall of the igniter located aft of the projectile.

A super duplex stainless steel with low susceptibility to weld cracks and high weldability, as well as the resistance to stress corrosion cracking and toughness of the weld zones. The steel is therefore suitable for a wide range of applications including heat exchangers exposed to sea water, brine-resistant equipment and structures, pipings in chemical plants, line pipes, and oil well pipes. The steel includes, in weight %, 2.0% or less Si, 2.0% or less Mn, 22.0-24.0% Cr, 4.5-6.5% Ni, 4.0-4.8% M...

A duplex focusing device is installed a duplex light transceiver module for transmitting light signals. The duplex focusing device comprises a ball lens assembly and a body. The ball lens assembly has a first lens and a second lens both being symmetrical half ball matching to each other. A layer of wavelength-division medium is placed between the first and second lens to ensure that light transmitted from a laser diode will transmit through the ball lens assembly. Thereby, the light transmitting...

A duplex light transceiver module comprises a body having a light receiving module, a light transmitting module, and an optical fiber adaptor. The light emitting module has a laser diode chip and a metal header bearing the laser diode chip. A metal cap of the duplex transceiver module is combined with a round cylindrical focusing element which is installed ahead a light emitting end of the laser diode chip. One end of the cylindrical focusing element is formed with a ramp. A wavelength-division ...

Apparatus for duplex printing comprising: a first impression roller (24) on which a first side of a sheet (22) having a leading edge and a trailing edge is printed referenced to the leading edge; a second impression roller (26) on which a second side of the sheet is printed; and a transport system (20) that removes a printed sheet from the first impression roller (24) and transports it to the second impression roller (26), the transport system comprising a perfector (32) that receives the sheet ...

An electrostatographic and/or xerographic machine includes a media path adapted to move a media sheet. Sensors are positioned adjacent the media path. The media sheet has a leading edge and a trailing edge and the sensors are adapted to identify locations of the leading edge and the trailing edge of the media sheet. A marking device is positioned adjacent the media path. The marking device is adapted to print first items on a first side of the media sheet and print second items on a second side ...