Abstract: Method and device for inspecting transparent webs for the presence of defects which include scanning the web to be tested with a flying spot, directing the light passing through the web to a receiver system which has transparent and opaque regions, supplying pulses by a photoelectric transducer disposed in the receiver to a computer corresponding to the light intensity received at the receiver system, directing the light spot such that when the material web is free of defects the light spot covers the opaque and the transparent regions of the receiver system in a continuous alternation, supplying the light spot intensity changes representing the change of regions to the computer as pulses and the light intensity fluctuations based on defects to the computer as pulses, and in the computer evaluating these pulses while these pulses are separated according to the regions of the receiver system.

Abstract: A clamp for circular cutting tools (2) has a bearing bore (6) at the clamp head (5) in order to support a cup-shaped insert (7). The receptacle (9) of the cup-shaped insert (7) is elastically deformable and has a recess configured as a truncated hollow cone and the centering profile (3) of the circular cutting tool (2) is configured as a truncated cone. The convergin cone angle of the recess in receptacle (9) is smaller than the cone angle of the centering profile (3). Several cuts (10) separate the receptacle (9) in spring segments (11). The bottom (12) of the recess has a larger diameter than the contact surface (13) of the circular cutting tool (2). It is provided with a circular groove (14) running along its periphery.

Abstract: In a batch package 20 which includes a stack 6 of individual packages 16, the external film 17 as well as the multilayer film 2 of the individual film 16 include several layers which are bonded to each other. The core layer 3 is made of a polypropylene polymer, the external layers 4, 5 of one of the films are made of a polypropylene copolymer or terpolymer consisting of ethylene or olefins which have 4 to 10 C-atoms, the external layer 21, 22 of the second film are made of acrylic resin. During heat sealing and shrinkage, the external layers 4, 5, 21, 22 of one film are bonded to each other, respectively; however, they are not bonded to the external layers of the second film; i.e. even after the shrinkage and heat sealing the external film 17 is not joined to the individual package 16 and the multilayer film 2 enclosing the latter.

Abstract: Laminated grinding disks are built up in layers with the interposition of at least one layer of vibration-damping materials as sound insulation, the layer of vibration-damping materials being placed in the mold in the form of fine, free-flowing powder and/or granules. The powder or granules can consist of elastomers which can withstand heating to more than 110.degree. C. The elastomer can be mixed with synthetic resin. The addition of filler improves the working qualities of the mixture and improves its granulability.

Abstract: High speed milling or drilling tool of the type including a rotatable head which carries several circumferentially arranged cutting insert holders for reversible cutting inserts retained by dogs. Each insert has a pair of parallel top surfaces bounded by four orthogonal end surfaces, two of which are received against perpendicular sidewalls in an open pocket of the holder. Each top surface has at least one pair of elongate clamping indentations which are formed as surfaces of rotation and lie at a like angle .beta. to the adjacent end surface of the insert.

Abstract: A diphasic ceramic compact, sintered without pressure, is prepared for use in a combination of two sliding or sealing elements with improved control of the bearing surface portion of the functional surface; the compact contains44 to 89.5 wt.-% of .alpha.- silicon carbide,0.5 to 6 wt.-% of boron carbide, and10 to 50 wt.-% of metal boridesfrom groups 4b to 6b of the Periodic Table of Elements, and the metal boride content is increased at the functional surface.

Abstract: Cutter inserts are provided with a circumferential primary bevel whose width is between 0.05 to 0.2 mm and which has an angle of inclination downward from the top surface of between 20 and 35 degrees. The primary bevel is adjoined by a secondary bevel which has a width between 0.5 and 2.0 mm and an inclination downward from the top surface between 5 and 15 degrees. The primary bevel is at an angle .alpha. between 5 and 15 degrees with respect to the secondary bevel. At the corner radii the secondary bevel comes to an end and thereby forms the strengthened area.

Abstract: The present invention is in a sintered molding of partially stabilized zirconium oxide having a microstructure of 40 to 70 volume percent cubic phase, 30 to 70 volume percent tetragonal phase, and up to 10 volume percent monoclinic phase wherein the tetragonal phase is present in the form of precipitates less than 200 nm. A mixture of magnesia and yttria is used to stabilize the zirconia. Optionally, the sintered molding may further contain up to 20 wt. % spinel.

Abstract: Web-like planar structures 10 are tested by means of a light source 11 which directs a light beam 4 onto a rotating mirror wheel 5. The light beam is projected onto the web 10 to be tested via a stationary folding mirror 1 which is centered above the web to be tested. The folding mirror 1 is composed of at least two mirror surfaces 2, which form an obtuse angle .alpha. to each other. The light beam 4 coming from the polygonal surface 14 of the mirror wheel 5 covers successively all mirror surfaces 2 of the folding mirror 1 during the rotation of the mirror wheel 5. The number of scannings of the web-like planar structures 10 per polygonal surface 14 is increased, corresponding to the number of mirror surfaces 2.

Abstract: Disclosed is a starting mixture for the preparation of a sintered body on a basis of aluminum titanate consists of more than 46 wt.-% TiO.sub.2, up to 49.5 wt.-% Al.sub.2 O.sub.3, 3 to 5 wt.-% quartz, and less than 0.2 wt.-% impurities, Al.sub.2 O.sub.3 and TiO.sub.2 being present in the weight ratio of 1:0.95 to 1:1.05. The sintered body according to the invention is composed of:15 to 35 wt.-% TiO.sub.2 ;60 to 85 wt.-% Al.sub.2 TiO.sub.5 (aluminum titanate);up to 5 wt.-% Al.sub.2 O.sub.3 ;up to 17 wt.-% Mullite; andmax. 0.2 wt.-% impurities,all parts by weight together totaling 100 wt.-%.Also disclosed are processes for making the sintered body.

Abstract: A method of testing security papers with respect to the positions of a safety thread and water marks to detect errors in the paper is performed by a linewise scanning of a finished paper web. The web has at least two point like measuring marks inserted into it in addition to the water marks, whereby impulses which are originated from these measuring marks are evaluated and the sheet width and the sheet distortion are calculated by comparing the x-y positions of the individual measuring marks with each other. The measuring marks are sharpe edged and rich in contrast. The given edge impulse is evaluated.

Abstract: A ski having good glidability, and low wear in its glide zones, and in which the tread areas in the glide zones are so configured that ordinary flexural stress will not ensue in cracking or other damage to the thread. The ski has a glide surface comprising one or more elements which are in the form of at least one of solid ceramic sintered compacts and coated metal base plates.

Abstract: Skimming blades in papermaking machines have a dewatering surface 4 adjoining the supporting surface 3 supporting the wire 1. To sustain the desired microturbulence of the fiber suspension 2 on the wire 1, the dewatering surface 4 is provided with troughs 7. The troughs 7 have a wavy shape, in which the wave crests 5 have a smaller radius r than the wave valleys 6.

Abstract: Disclosed is a cutting tool insert of sintered ceramic intended for machining ferrous materials. The insert contains 7 to 29% by volume of a hard substance, 1 to 15% by volume of a metal oxide compound, and at least 70% by volume of aluminum oxide, and a maximum of 0.3% by volume of impurities.

Abstract: In a sliding element having first and second members in friction and/or sealing contact, the first member s made by sintering a ceramic mixture based on silicon nitride, the content of the silicon nitride phase and/or of the silicon nitride mixed crystal phase being at least 60 weight-percent and the second counter-element member being formed of a ceramic material based on aluminum oxide.

Abstract: In microcapsules of the type used for pressure-sensitive, carbonless copy papers, having walls formed from aliphatic diisocyanate and diamine and containing a solvent mixture with a dye precursor dissolved therein, the solvent mixture containing a component which easily dissolves the dye precursor and the capsule wall material and a component which only poorly dissolves the dye precursor and the capsule wall, the improvement comprising the poorly dissolving solvent component is an alkylbenzene having from 8 up to 14 C-atoms in the alkyl moiety; and the easily dissolving solvent component is selected from the group consisting of diisopropyl naphthalene, a hydrogenated terphenyl, an alkylated diphenyl, a diphenyl alkane, a chloroparaffin and a mixture thereof, the ratio of easily to poorly dissolving components ranging form 15:85 to 75:25 vol %, and being adjusted within this range so that a solution of the wall-forming aliphatic diisocyanate is just at the turbidity point in the mixture of easily dissolving an

Abstract: A manual grinding or polishing tool consists of an endless grinding or polishing belt, which is tightened about a substantially flat bar-like profile having at least one limb. The limb or limbs are disposed resiliently in relation to the profile, so that the grinding or polishing belt is held under tension. The resilient material can consist of strip steel or elastomers. Between the grinding or polishing belt and the tool body a resilient intermediate layer can be disposed in the form of an endless belt.

Abstract: A jaw implant having a bore to accommodate a replacement tooth holder, which has a screw head and a lower portion provided with a screw thread. The screw head is configured and proportioned such that the portion provided for embedment into the cortical bone tissue is of cylindrical shape, and has a diameter that is not smaller than the outside diameter of the thread on the lower portion.

Abstract: The inspection for surface deformation of flat glass is carried out by the flying-spot method wherein the beam of light is thrown by a rotating mirror 13 onto a folding mirror 6 which reflects the light onto the continuous sheet of glass 2 to be inspected. The reflected light beam 4 strikes a light-diffusing plate 1 disposed ahead of the receiver 11. The area of the light-diffusing plate 1 on which the beam of light impinges when the sheet of glass 2 is free of defects is opaque. On this opaque area there are disposed in a spaced relationship two photodiodes 7 between which a light bar formed by the scanning light beam extends. When the thickness of the flat glass 2 varies gradually, light will strike one of the photodiodes 7. The pulse so triggered controls a tracking mechanism 50 which adjusts the folding mirror 6 so that the light bar again extends between the photodiodes 7.

Abstract: A process is disclosed for manufacturing flat shaped articles made of individual fibers such as paper, woven fabric, knitted fabric and non-woven fabric impregnated with an aqueous dispersion of a polymeric binder including a sensitizing agent for causing the dispersion to coagulate at a temperature substantially below 100.degree.C. The binder coagulates at a temperature substantially below 100.degree.C. and the method includes impinging live steam on the major surfaces of the article to suddenly coagulate the binder, thereby fixing its position within the fabric and preventing its migration to the fabric's surfaces. One or more adjustable position steam nozzles are used for this purpose.