Abstract: Tweezers for holding strip-shaped or thread-shaped material with particularly abrasive characteristics are disclosed, for example, for dental purposes, wherein clamping elements, particularly in the shape of rods, are arranged in the area of the free end of each of the two legs of the tweezers, and wherein, in the closed position of the tweezers, at least one clamping element arranged at a leg contacts two clamping elements arranged at a distance from one another at the other leg or engages in a recess located in the latter.

Abstract: Tweezers for holding strip-shaped or thread-shaped material with particularly abrasive characteristics are disclosed, for example, for dental purposes, wherein clamping elements, particularly in the shape of rods, are arranged in the area of the free end of each of the two legs of the tweezers, and wherein, in the closed position of the tweezers, at least one clamping element arranged at a leg contacts two clamping elements arranged at a distance from one another at the other leg or engages in a recess located in the latter.

Abstract: Tweezers for holding strip-shaped or thread-shaped material with particularly abrasive characteristics are disclosed, for example, for dental purposes, wherein clamping elements, particularly in the shape of rods, are arranged in the area of the free end of each of the two legs of the tweezers, and wherein, in the closed position of the tweezers, at least one clamping element arranged at a leg contacts two clamping elements arranged at a distance from one another at the other leg or engages in a recess located in the latter.

Abstract: A process is disclosed for coating a ceramic composite in which the composite has a pattern of grooves cut into the surface followed by coating to increase adhesion and inhibit cracking of the coating.

Abstract: A process is disclosed for coating fiber reinforced ceramic composites which has particular application for high temperature resistant composite materials for use in applications such as the aerospace industry. The process involves etching the surface to be coated with an etchant to expose the fiber in the ceramic composite while leaving the fiber intact and bound to the ceramic composite, followed by coating the etched surface with a coating composition.

Abstract: The device has a support plate (119) provided with drive means (112, 117) for at least one lower part, as well as a plurality of holding plates (85) arranged in one row with an upper receiving surface and a lower receiving surface (93, 94), respectively, for a plurality of upper parts. The holding plates (85) can be rotated through 180.degree. by means of a pivoting device (86, 87, 108) around a symmetrical horizontal axis (L3). After the upper parts have been placed on the holding plates (85), adhesive is applied to the edges of the upper parts, after which the holding plates (85) are pivoted through 180.degree.. The support plate (119) subsequently gathers the upper parts, which are now hanging down, while at the same time the next upper parts can be placed over the receiving surfaces of the holding plates (85), which [receiving surfaces] are now facing upward. The support plate (119) and the holding plates (85) are designed as suction plates that can be turned on and off.

Abstract: In the process for manufacture of seat covers with honeycomb cells, a plain and folded segment of a cover material is introduced by means of a fold forming traveler into a first of several grooves of a foam plastic panel and after the traveler is retracted, the fold of cover material is sewn to the foam panel. Then, a new segment of the cover material is folded back over the seam by the traveler in the direction of the adjacent second groove and, after forming a fold, is sewn in this groove. In the seat covers produced by this process, the seams are fully concealed by the cover material.

Abstract: A skin holding device on an apparatus for letting out skins is driven by drive devices to follow the treatment and feed tools acting on the skin, so that the skin zone received in the skin holding device is moved synchronously with the skin zone gripped by the treatment and feed tools. In this way a skin, when being let out, can neither be distorted nor can it deviate from its initial angular alignment.

Abstract: An apparatus for letting out skins comprises behind the parting sword a needle bar movable up and down which is movable in addition parallel to the drawoff direction of the skin through a drive mechanism. Together with a supporting plate movable up and down, the needle bar acts on the skin section already let out so that it is held taut and flat.

Abstract: A coating composition for application to a substrate for curing thereon to form an ablative coating. The composition comprises a reactive mixture of epoxy and polysulfide resins, an amine curing agent, refractory fibers and inorganic materials serving as a source of one or more Lewis acids and being capable of forming a glassy reaction product when exposed to heat. When applied to a substrate, the solvent-free composition cures to a tightly adhering, flexible coating capable of providing thermal protection in a very high-temperature, erosive environment.

Abstract: A device for use with a sewing machine for making garments with pleats operates with a folded-over workpiece which is advanced past a reciprocating sewing needle and includes a pleating bar assembly which is insertable between the folds of the material and includes portions which engage against the folds of the material to hold a pleat in position while it is moved by a feed pressure member into a sewing position. The pleating bar assembly includes a supporting member such as a shaft or a rod having pleat members with bearing portions which are rotatable on the support member to permit the plates to be held in position and to be collapsed for bringing the pleat to a sewing position. The material is held by needle or pin members which engage into the material as it is fed into the sewing position.

Abstract: A device is disclosed for letting out hides which comprises a table having a longitudinally extending slot therein for supporting a hide, clamping jaws movable laterally of the slot to clamp a fold in the hide, and a parting sword raisable into the slot to form a fold in the hide and move it into the space between the jaws. One of the jaws is movable parallel to the longitudinal slot to offset part of the hide after it is cut. The parting sword is made up of a pair of side plates and an intermediate plate. One side plate which is adjacent the lengthwise movable jaw is also movable to facilitate the movement of the hide part therebetween into its offset position and the intermediate plate is movable vertically with respect to the side plates so as to form a slot between the side plates in a lowered position to facilitate cutting of the hide and, to permit the clamping of the hide parts using the clamping jaws, against the intermediate plate, with the intermediate plate raised above the side plates.

Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.

Abstract: A fur sewing machine equipped with two feed discs is provided with a trimming mechanism. The trimming mechanism includes a trimming blade which is mounted for oscillatory motion close above the feed discs, and a fixed counterblade. The counterblade is secured to a blade holder which, at the same time, is used for axially fixing the feed disc which is supported on a displaceable carrier bracket. An exhaust device equipped with an injector nozzle is provided to remove the off cuts.

Abstract: Equipment for letting out hides, in which the hides are cut several times obliquely to their lateral edges, the hide parts are then laterally offset and then sewn together again. A gripping tool is provided and is movable crosswise and lengthwise to the cutting line. After the sewing operation, the gripping tool seizes the cut edge and pulls the hide crosswise to the cutting line by the desired distance between cuts. Thereafter it moves the hide parallel to the cutting line, to obtain a constant distance between the sewing machine and the respective seam start on the hide.

Abstract: An apparatus for the parting of hide hair is provided with a hide hair divider moved reciprocally in a longitudinal direction and comprising a plurality of wedge-shaped parting points and similarly formed counter-points. Between the parting and counter-points which are directed against each other, a comparatively narrow gap is provided, which widens to a wide opening. Because of the narrow gap, the parting and counter points cover each other in their path of motion, whereby the danger of the hide hair divider becoming hooked at the hide is reduced.

Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.

Abstract: An apparatus for use with a sewing machine which has a reciprocating needle which moves in cooperation with a pick to sew materials such as furskins into sections at a sewing zone comprises a carriage which is mounted alongside the machine and is movable through a sewing zone and which is advantageously driven from the sewing machine through a drive means which may be selectively connected to the carriage for moving it. A clamp is employed for clamping the material or the furskin therein which is to be joined from an initial skin portion or section and it is positioned on the carriage for movement with the carriage past the sewing zone for sewing thereof to a previously formed section which is held in a holding bracket which is carried by the carriage for movement therewith through the sewing zone at the same time as the furpiece carried in the clamp.

Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.

Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.