Abstract: The process control method for a DAD-CAD image forming method includes forming a DAD electrostatic image of a first polarity and applying toner of the first polarity to form a first toner image and then forming a CAD electrostatic image. To provide ample voltage for formation of the CAD image and to reduce scavenging, the development completion of the first electrostatic image is preferably kept below 0.4, preferably by reducing pole transitions provided by a rotatable magnetic core in toning the first image. The process is further controlled by adjusting an initial charge on the image member which also can be trimmed after formation of the first image by a uniform light exposure and by adjustment of AC biases in both toning steps.

Abstract: A mechanical vacuum pump is provided with a pair of cooperating rotors mounted on rotatable shafts within a pumping chamber. Each of the pair of cooperating rotors has a claw profile that terminates in a leading edge shaped to present an angle of no greater than 90 degrees relative to the wall of the pumping chamber. The leading edge shaped in such manner helps to prevent contaminant buildup on the wall of the pumping chamber.

Abstract: Apparatus and method for performing floating point divide operations in 2-bit, non-restoring iterations, wherein multiples of the divisor are formed by selective gating of one or more representations of the divisor into a single 3-input adder circuit, to calculate the partial quotients and subsequent partial dividends. The apparatus produces, without the need of separate holding registers, the zero, 1/2, 3/4, 1 and 3/2 multiples of the divisor.

Abstract: A cargo bed liner system for use in pickup trucks, four-wheel drive vehicles, light utility vehicles and the like, in which rigidified carpeting material made of needle-loomed staple fibers of polypropylene and polyester have been thermoformed to form a floor covering piece, a tail gate covering piece, and two side covering pieces, with flaps on the floor piece being folded upwards to cover the forward panel and any areas of the side panels which have not been covered by the side panel cover pieces. The system is affixed to the vehicle's cargo bed by means of several velcro-type fasteners.

Abstract: This invention relates to an expendable tool, such as a plug assembly, which may be locked within a tubular member, such as a packer assembly, located within a well casing, and a method of locating and releasing same. The plug assembly comprises a main housing adapted to support a plurality of circumferentially spaced, radially retractable locking segments. A longitudinally extending mandrel is slidably mounted within the housing and is axially shiftable from an first position, wherein the mandrel maintains the locking segments outwardly within a cooperating groove formed in the packer assembly, to a second position, wherein the locking segments are permitted to move out of engagement with the well packer. A collet sleeve is secured to the mandrel by a shear pin and maintains the mandrel in the upper position. When it is desired to release the plug from the packer assembly, an actuating sleeve is attached to the lower end of a tubing string and run down the well casing to be engaged by the collet sleeve.

Abstract: The invention comprises a packer which seals against a surrounding well conduit. The packer comprises a mandrel which carries a radially extendable seal for engaging the well conduit. A hydraulic actuator is provided for urging the seal to its set position against the well conduit. Once set, the tool is responsive to fluid pressure differentials in the well conduit across the seal in either longitudinal direction to tighten the seal means. The cylinder of the actuator also serves as a guard to overlie and protect the seal in its unset position, while the piston is designed to define auxiliary piston area to reduce the required setting pressure. The seal is set by being extruded both longitudinally and radially over a retainer extending radially outwardly from the mandrel.

Abstract: Telephone answering apparatus adapted to be coupled to a telephone line and having a first storage medium, such as a first magnetic tape, for storing announcement information and remote telephone number information, and a second storage medium, such as a second magnetic tape, upon which are recorded messages which are received via the telephone line. In response to an incoming telephone call, the first tape is driven so as to transmit the prerecorded announcement, and at the conclusion of this announcement the first tape is stopped and the second tape is driven so as to record an incoming message. A timing circuit is actuated for the duration of the incoming message so as to determine whether it exceeds a minimum duration. At the conclusion of the incoming message, a calling circuit is actuated to resume driving the first tape so that the remote telephone number information is transmitted, thereby dialing a remote telephone station.