Abstract: A process for polymerizing .alpha.-olefins in the liquid phase is disclosed, wherein the olefins are polymerized in the presence of a catalyst prepared by first reacting as aluminum-halogen compound with an organomagnesium compound and thereafter reacting the resulting reaction mixture with a transition metal compound and then activating the resulting catalyst system with an organo-aluminum compound. The homopolymers and copolymers of .alpha.-olefins produced by this process find use in the normal applications of such polymers.

Abstract: A method of linearly filtering spatially two-dimensional signals. The signal to be filtered is applied to an electronic imaging system. For providing a scanning movement, the signal is deflected in the electronic imaging system and swept over at least one mask in which a desired corrective filter function is established in the form of a specific transmission characteristic. The light passed by the mask is detected by means of at least one photodetector placed behind the mask. The output signal of the photodetector is a representation of the filtered two-dimensional signal as a function of the time.

Abstract: Edge shadow effects on copies obtained by episcopic exposure of an original lying on a transparent exposure plate are prevented by directing light toward at least one side edge of the original from a surface laterally adjacent thereto of a light transmitting means disposed on the exposure plate. Each light transmitting means is constituted by a transparent plate member having its surfaces made diffusely reflecting, except a transparent surface directed toward the original and a transparent surface disposed in a path of illumination from a light source. Such a plate member extending along a margin of the exposure plate in electrophotographic copying apparatus serves the dual function of guiding the laying of an original onto the exposure plate and preventing edge shadow effects which otherwise result from a narrow slit or cavity that usually occurs between an edge of the original and the guide member usually provided on the exposure plate.

Abstract: In electrophotographic copying apparatus utilizing a photoconductive belt having markings regularly spaced apart on its back side for control of the copying operations by moving past a detector comprising a light source and a photoelement to generate signal pulses, the detector is made to perform reliably notwithstanding variations of the sensitivity of the photoelement, or of the light emission, by the provision of a circuit for emitting a detector signal proportional to the amount of light sensed by the photoelement together with a signal modifying circuit that maintains an output signal level corresponding to the average value of the detector signal and a control circuit responsive to the output signal level for controlling the intensity of the light source.

Abstract: In a process and apparatus for fixing thermoplastic image material onto paper, wherein the image material in thermally softened condition is transported through a pressure zone while being pressed between and in contact with the paper and belt moving together through said zone, and upon leaving said zone the paper and belt are separated from each other by forced movement of the belt along a path curved away from the paper, the fixing of the image material to the paper is achieved reliably in a simple manner, with little sensitivity to variations of temperature or of the character of the belt surface, by maintaining the thickness of the belt, the speed of movement of the belt and the radius of curvature of said path in a relationship defined by the formula: (D .times. V/R).gtoreq. 0.05, in which D represents said thickness (in meters), V represents said speed (in meters per second), and R represents said radius (in meters).

Abstract: A collating apparatus is mounted above a copying machine and includes a housing frame enclosing a conveying mechanism for conveying sheets from the copy-ejection part of the copying machine along a vertical path alongside of which are positioned horizontal trays for receiving the copy sheets as collated. The trays have associated therewith guide elements which are balanced in equilibrium in a first position in which they project into the conveying path to guide sheets into their corresponding trays and which are activated by the receipt of a sheet in the tray to a second position in which they are moved out of the path. The guide elements are locked in this second position by pawl-like locking elements until all locking elements are released by an unlocking means activated by the copy machine start button.

Abstract: A polycrystalline, fibrous rutile TiO.sub.2 pigmentary material having good optical properties and retention in paper, and exceptionally high tinting strength in latex paint systems is prepared by treating a substantially sulfate-free hydrous TiO.sub.2, prior to calcination, with a mineralizing complex comprising alkali metal and alkaline earth metal salts, a compound of boron and a rutile promoter sol, and calcining the treated hydrous TiO.sub.2 at temperatures in the ranges of from 812.degree.-865.degree. C. followed by washing to remove the calcium ions, milling, hydroclassification and drying; or optionally by a postcalcination treatment for imparting optimum pigmentary properties.

Abstract: A soil cultivating implement or rotary harrow has a row of soil-working members rotatably mounted on upwardly extending shafts. Driving means rotates the shafts and tools, preferably tines, are moved through the soil to work same. Fluid material from a container on a supporting structure is passed in the worked soil through injectors located adjacent the soil-working member. The injectors can be included with each soil-working member and can comprise one or more tine injectors. The injectors extend into the ground and conduct fluid through ducts and passages from the container into the ground. A roller at the rear of the injectors smooths the worked soil.

Abstract: Disclosed is a circuit for automatically controlling the feed rate of parts that is particularly adapted for controlling inductive loads. Disposed on either side of a passageway is a light source and a photo-sensing device which emits a signal pulse whenever a part interrupts the light beam between the light source and the photo-sensor. The pulses from the photo-sensing device are supplied to a monostable multivibrator which converts the pulses to uniform width, fixed amplitude pulses that are integrated and provided to a control circuit which controls the charge on a capacitor. When the charge on the capacitor exceeds a predetermined level an SCR is triggered, operating the motive means of the circuit.

Abstract: Development of a charged photoconductive medium in xerographic copying apparatus is prevented when a properly formed charge image is missing as a result of insufficient imagewise exposure, by a system in which the intensity of the exposing illumination is sensed by a detector such as a photoelectric cell or a phototransistor, and when the illumination is below a level sufficient to form a proper charge image a signal emitted by a detector causes a discharging device such as an A.C. corona or a lamp to discharge the charged medium at a location between the exposure station and the developing station of the apparatus. Means also are provided whereby said signal causes interruption of the feeding of copy material to receive an image, and whereby it causes the execution of a preset copy program to be blocked until the exposing illumination is restored to a proper level of intensity.

Abstract: The invention concerns a device for securely fastening panels of a suspended wall or ceiling construction having in-turned flanges at the sides of the panels, panel supports running transverse to the panels, hooks on the panel supports, on which hooks the flanges of the panels rest, and locking members positioned between each two adjacent panels to insure firm securement.

Abstract: This invention relates to mower conditioners of the type having at least two rotatable cutter units mounted side-by-side and each supporting at least one cutter blade to cut the standing crop by impact, as opposed to shearing. The mower-conditioner comprises a rotary crop conditioning and spreading apparatus extending rearwardly of the mower and having a pair of rotary units disposed rearwardly of each pair of cutter units, with each rotary unit being rotatable about a generally upright axis. One rotary unit of each pair of rotary units is located closer to the mower than the other rotary unit of the pair.

Abstract: An amplifier having a plurality of cascaded stages each comprising an operational amplifier having an output connected to a first output terminal of the amplifier through two series-connected resistors and a capacitor, the junction point of the two resistors being connected to the negative input of the operational amplifier, and the junction point of the capacitor and one of the series-connected resistors being connected to the positive input of a next operational amplifier, the output of each operational amplifier being additionally connected to said first output terminal through a variable resistor having a movable contact connected to the second output terminal of the amplifier.

Abstract: A method and apparatus for evaluating the corrosion protection that will be provided to a metallic surface by a surface layer. The layer is formed by use of corrosion inhibitors in a corrosive fluid.

Abstract: In a gyro horizon type of equipment, roll corrections are fed to the aircraft symbol which is a normally fixed display element and pitch correction is introduced on a movable display element or drum with modification of the position of the display elements of the instrument gyro as a function of an interconnection of the instrument gyro with a gyromaster reference through comparators connected to each of the roll and pitch systems.

Abstract: A package for packaging a stack of articles in sheet form comprises at least two strips which are overlappingly sealed to each other, so forming a loosely overlying edge which greatly facilitates opening of the package. The whole may be provided with protective sheets at both sides of the stack, whereby said protective sheets may have a row of perforations at the edge of the composing strips so that the first sheet of the stack may easily be taken from the stack after removing part of the protective sheets.

Abstract: A method and apparatus of connecting the ends of a strap of thermoplastic material wrapped about a package comprising, winding a strip from a supply about a package, separating the strap from the supply to define two ends and a free end connected to the supply, positioning the ends in overlapping relation, interposing the said free end between the overlapping ends, applying a pressure force to the two ends and a relative tractive force longitudinally to the free end to create heat until the free end is removed and the two ends are fused to one another.

Abstract: Method for the production of biaxially molecularly oriented polymeric film with more balanced tensile characteristics across the width, by subjecting the film between the longitudinal and the transverse stretching to an intermediate release treatment comprising maintaining the film at reduced longitudinal tension and at a temperature which is comprised between the second order transition temperature of the film and a temperature which is by 30.degree. C higher.

Abstract: The invention comprehends a capsule for stoppering the neck of a bottle, characterized in that its skirt has a cross section which is cylindrical practically over the whole of its vertical height, has a slight thickness, substantially uniform over the whole of its height, and includes around its inner wall, a retaining rib of triangular section intended to be anchored and fit beneath the collar on the neck of the bottle.

Abstract: A plastic container includes a one piece plastic body portion having a cylindrical outer wall and a bottom wall, and a one piece cap portion having a cylindrical outer wall and a top wall. The outer wall of the cap has a snap fit around a portion of the outer wall of the body to hold the cap on the body. The top wall and the bottom wall have a plurality of small holes therethrough which allow gases and vapors to enter the container but prevent the contents of the container from leaving the container. The holes are in the shape of square truncated pyramids with the larger area ends of the holes being at the inside surface of the respective walls. A label may be secured around the cylindrical outer surface of the container across the junction between the body and the cap to help prevent removal of the cap from the body.