Abstract: A video camera is located at a secure access point and is connected to a computer network. The camera is used as a conventional security camera and also provides automated assistance with access control. When an identity badge is presented to the camera by a person requesting access to the facility, a computer that is monitoring the camera recognizes a bar code or other symbols on the badge and accesses a database to locate information associated with that identity badge. This information is then used to determine if the person should be granted access.

Abstract: A self supported cylindrical corrugated filter. The corrugations of the filter define a first and second end. Two arcuate side walls join the first and second end. The filter has a substantially planar front surface and a substantially planar rear surface. The front and rear surfaces extend the length of the filter. The arcuate side walls have a plurality of overlapping folded flaps. Each one of the plurality of flaps is joined to at least one adjacent flap from the plurality of flaps to form the self supported filter.

Abstract: An extruder has a casing with at least one bore. One screw each is arranged in the bore in a rotatably drivable manner and is provided with a screw tip adjoining a nozzle plate. A shearing tool is arranged at the screw tip directly in front of the nozzle plate and is provided with at least one arm, with a shearing gap being formed between said arm and the nozzle plate.

Abstract: A worm shaft coupling for connecting a driven shaft of a transmission mechanism and a coaxially arranged worm shaft of an extruder has a coupling sleeve which connects two coupling pegs in a torque-proof manner and is, in turn axially secured using threaded sleeves. The internal thread of the threaded sleeve facing the worm shaft of the extruder and the associated external thread of the coupling sleeve have recesses allowing the threaded sleeve and the coupling sleeve to be connected in the manner of a bayonet fixing.

Abstract: An apparatus for the manufacture of corrugated board has a housing, in which the following are accommodated: a corrugating roller unit for the production of a corrugated web out of a material web, comprising corrugating rollers adjacent to each other, a gluing device for applying glue to the corrugated web and a pressing device for pressing the corrugated web, to which glue has been applied, to a liner. Outside the housing, a corrugating roller unit loader is arranged with a plurality of corrugating roller unit holders. These each serve to accommodate one corrugating roller unit. The corrugating roller unit loader is displaceable with respect to the housing and guided between loader positions such that in each of the loader positions, a loader guiding portion of one of the corrugating roller unit holders aligns with a housing guiding portion to move a corrugating roller unit, which is accommodated in the corrugating roller unit holder, between a loader holding position and a housing operating position.

Abstract: An extruder with a housing comprising parallel, partially inter-engaging bores and screws disposed therein is used when applying a method of feeding powdery bulk materials into such an extruder. A solid transport of powdery bulk material takes place in an inlet zone disposed downstream of a feed opening wherein said inlet zone is partially filled. The inlet zone is provided with at least one gas-permeable wall portion wherein a layer of bulk material is created on said wall portion, thereby preventing bulk material from passing through, The gas-permeable wall portion is connected to a vacuum source and to a pressure gas source. Furthermore, the gas-permeable wall portion has an inner wall which is set back with respect to the wall of the bores, thereby forming a gap with a partially annular cross section wherein a layer of the bulk material is formed in the gap.

Abstract: A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation.

Abstract: A drive unit for a twin-screw machine, of which the screw shafts, which can be driven in rotation in the same direction, have an axial spacing a, has two output shafts. The output shafts are provided with a respective crown gear which does not collide with the adjacent output shaft. The drive motor provided is in the form of a torque motor having a stator housing, a rotor, which is rotatably arranged in the stator housing, and at both ends of the rotor, outside the stator housing, a drive pinion meshing with a crown gear.

Abstract: In a method for splicing material webs and an associated splicing device it is envisaged, for producing an improved joint, to join the material webs in the area of cut edges essentially overlap-free to form an endless material web, the cut edges being produced by cutting the material webs at least along a first cutting direction and along a second cutting direction, and the cutting directions enclosing an angle ? such that 0°<?<180° applies.

Abstract: An apparatus for the manufacture of compound pipes with an oval cross-section is equipped with mold halves which advance in a direction of production and of which two at a time combine as a pair on a molding path to form one mold. An injection head of at least one extruder is arranged upstream of the molding path. An external nozzle used for the creation of an external tube is substantially circular in shape and is located at a distance upstream of the molding path. An internal nozzle with a cross-section similar to the oval cross-section of the pipe to be created is located inside the molding path. When entering the molding path, the external tube extruded through the external nozzle is expanded in one direction and pressed together in a direction which is perpendicular to the former.

Abstract: A self-tightening retaining system for securing a closure in position closing an access port of a pump housing. The system includes a retaining cover for obstructing removal of the closure from a bore of the access port. The cover has external threads interengageable with screw threads of the bore. A locking device is configured for being secured to the cover such that the locking device rotates together with the cover. The locking device has a fastener receivable in a hole of the closure and has external threads interengageable with threads of the hole. The threads of the cover and the threads of the fastener are spiraled in opposite directions such that when the cover rotates in a loosening direction, the fastener becomes tightened in the hole of the closure thereby stopping the rotation.

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A system, apparatus and method for treating water in a landscape pond so as to enhance the water clarity, where the water to be treated is delivered to a treatment pond to reduce the particulate matter and nutrient level of the water. The treatment pond includes a nutrient level reducing vegetation, facultative bacteria, substrate material for the bacteria (usually gravel) and a treatment apparatus. The treatment apparatus includes a generally vertically disposed hollow and cylindrical stack formation which extends between the treatment pond bottom and surface and defines at least one (1) coupling construction. At least one (1) elongated and generally horizontally disposed water disbursing module is positioned on the pond bottom and coupled to the stack formation. The disbursing module includes a flat bottom, an arcuate upper surface having a plurality of exit apertures therein and a pair of end formations, all of which define a passageway.

Abstract: A method for coating zinc, zinc plated, or steel articles with a hydroxy benzoic acid protective coating by coating a cleaned zinc, zinc plated, or steel with a hydoxy benzoic acid composition having a pH of about 2.0 to 5.0; and coating cleaned tin surfaced articles with a composition having a PH of 2.0 to 12.0, and the composition having as its essential ingredients proteins, amino acids, amino acid—protein compounds and amine alcohols; and the articles produced thereby along with the coated articles having an appropriate paint thereon.

Abstract: A metal film is deposited on a starting substrate, which is any one of a single crystal sapphire substrate, a substrate comprising a single crystal gallium nitride film grown on a sapphire substrate, and a single crystal semiconductor substrate, and a gallium nitride film is deposited on the metal film to form a laminate substrate. By virtue of the above construction, after the growth of the gallium nitride film, the gallium nitride film can be easily separated from the starting substrate, and a gallium nitride crystal substrate, which has low defect density and has not been significantly contaminated with impurities, can be produced in a simple manner.