Abstract: An arcuate anti-erosion shield of stellite or the like has an inner surface with a film supported adhesive attached thereto and gasket strips formed from a fluoroelastomer along the edges thereof. The method of repair of an eroded shield is disclosed in which the eroded shield is removed, welding material dissolved by acid, and the blade sandblasted. The film is removed from the shield and the shield installed on the turbine blade. Pressure and heat is applied to the shield to thermoset the adhesive.

Abstract: A method for the restoration of radial cord vehicular tires having damaged cords. A portion of the inner surface of the tire casing is removed over a region including at least the damaged area to a depth sufficient to remove all damaged radial cords. This removal region includes up to, and across, both bead portions of the casing. A patch unit having a conforming outline to that of the trough created by the removal is inserted into the trough and is bonded therein. This patch unit extends in the trough across the bead portions. The patch unit contains reinforcing cords to replace those that are removed. Preferably, the body of the patch unit is formed of uncured rubber which is cured in place in the casing so as to become permanently bonded to the casing. Cosmetic repair of the external surface can be accomplished by removing damaged material and thereafter filling the region, preferably with uncured rubber that is cured in place.

Abstract: A method for the production of frames from rigid plastic profiles for use on refrigerator cabinets and in particular on chest freezers, which comprises forming the plastic profiles, mitering and welding the edges of the plastic profiles to form a frame having sharp-edged corners, and rounding at least one of the sharp-edged corners by means of thermo-forming.The invention also comprises the finished frame thereby obtained and its application in the field of refrigerator cabinets and in particular, chest freezers.

Abstract: Damaged composites are repaired by use of a rubber modified vinyl ester resin composition as either an adhesive for bonding metal or cured composite to the area surrounding the damaged area or by placing an uncured reinforcing material saturated with a rubber modified vinyl ester resin composition over the prepared damaged zone and curing in place.

Abstract: A repair patch kit for repairing holes in panels of composite materials includes a bolt having a rigid washer of about the same diameter as the hole to be repaired. The rigid washer bears against a flexible washer that is substantially larger than the hole. The flexible washer has radiating flukes extending from a central hub region. The flukes can bend when the flexible washer is pushed through the hole and then spring back to their original shape on the blind-side. One edge of the flukes is curved which causes the flukes to twist and present only one edge to the edge of the hole as the flexible washer is pushed through, to facilitate passage of the flexible washer through the hole. A set of resin-impregnated fabric plies is pushed through the hole behind the flexible washer on the bolt and is pressed against the marginal regions of the hole on the blind side of the panel by the flexible washer.

Abstract: A method for repairing carbon fiber rapiers used in weaving machines which have been split longitudinally comprises grinding the rapier at the split to form a longitudinal groove in the body of the rapier along the split, filling the groove with a paste of ground glass fiber in epoxy resin, and grinding off any resin paste which extends beyond the original rapier configuration. A repaired rapier having a groove filled with a mixture of epoxy resin and ground glass.

Abstract: A method for performing a repair to a damaged area on a contoured section of a composite structure, including the steps of laying up a repair patch over the damaged area of the composite structure, installing a conformal thermocouple over the repair patch so that the conformal thermocouple is in direct communication with and completely conforms to the exact shape of the contour section so as to act as a vehicle for the transfer of heat and pressure to the repair patch, applying heat to the repair patch via the conformal thermocouple, applying pressure to the repair patch via the conformal thermocouple, and curing the repair patch.

Abstract: A repaired elastomer article having a cut or crack entirely therethrough. A treating agent is located about the cut portion on the inner surface of the article and an amine curable polymer or prepolymer layer resides over said treating agent. A cured elastomeric patch resides over said curable polymer. Since the amine curable polymer cures at ambient temperatures, the repair of the elastomer article can occur on site. The invention is especially useful in the repair of tires.

Abstract: A method for performing a repair to a damaged area of a composite structure wherein an obstruction is in close proximity to the repair site, including the steps of laying up a first patch on the repair site on a first side of the composite structure, applying heat to the repair site via a second side of the composite structure which is opposite to the first side of the composite structure so that heat is conducted through the composite structure from the second side of the composite structure to the repair site on the first side of the composite structure, applying pressure to the repair site, and curing the first patch.

Abstract: Cryogenic process and apparatus for removing adherent coatings or linings from metallic substrates, especially the interiors of metal vessels or pipes. In one embodiment, a metal vessel having a polymeric interior lining is pressurized to about 900 psi, and the lining is contacted with a cryogenic liquid, preferably carbon dioxide, while this pressure is maintainted. The pressure is high enough so that the cryogenic liquid does not boil. The lining is then subjected to shock by ultrasound, for example. This causes the lining to break up into small particles and fall off the metal substrate. These particles, suspended in the cryogenic liquid, are removed from the pressure vessel and separated from the cryogenic liquid, which can be reused. In another embodiment, the cryogenic liquid is injected into a pipe having an adherent mineral deposit while maintaining a pressure of about 700 psi. A stream of cryogenic liquid containing suspended mineral particles is removed from the pipe.

Abstract: A method and structure is disclosed herein for effecting repairs of ballistic damage in stressed aircraft structures, including bending of two thin manually deformable metal sheets each adhesively bonded to one part of a hook and pile fastening material, known as "Velcro", the bent and conformed patches once in place being impregnated with resin. Once the resin hardens the interlocked hook and pile surfaces are fixed, fixing the curvature and stiffness of the resulting patch.

Abstract: A method of stopping leakage of water in a concrete structure comprising injecting a hydrophilic one component type polyurethane prepolymer or an impregnating agent which is prepared by adding cement to such polyurethane prepolymer into a hermetically sealed chamber formed in a leaking part of the concrete structure, whereby the polyurethane prepolymer foams and cures through reaction with water leaking in the concrete structure and the foamed prepolymer is forced to enter all cracks in the leaking part of the concrete structure by means of foaming pressure and volume expansion caused by the reaction, thereby caulking and hermetically sealing the cracks, and thus restoring the strength and watertightness of the concrete structure.

Abstract: A method of repairing windshields that have been chipped or cracked comprising the steps of removing damaged glass from a break in the surface of the glass, fixing a pressure applier over the break, impact vibrating the windshield and heating the reverse side of the windshield to increase the size of the opening being filled and to drive air from the opening, injecting a resin into the damaged area while vibrating and heating and, if necessary, removing any additional air by developing a suction over the damaged area. The apparatus of the invention includes a frame that is suction held in place, and that mounts the injection plunger and a vibrator to vibrate the glass as a resin is injected into openings in the glass.

Abstract: A method for repairing and reinforcing a torn plastic tote is provided. The edges of the tears are bevelled and the tears are then welded with a plastic material which is of the same type as the material from which the plastic tote is made. A strip of plastic material is formed into a closed loop by welding the ends of the loop together. The loop is placed around the upstanding walls, preferably around the upper edge thereof and the loop is then spot welded to the upstanding walls. In an alternative embodiment, only a loop is placed around the tote and the tears are not welded.

Abstract: Apparatus for extracting a coverslide from a solar cell includes a receptacle defining a cavity in which a rack is disposed which mounts a plurality of partitions in spaced, side-by-side relationship. The partitions define a plurality of extraction chambers therebetween which are open at their opposite ends. A screen is disposed below and underlies the rack for retaining solar cell modules received within the chambers in upright standing positions therein. The cavity is almost filled with a liquid solvent capable of detaching the coverslide of each module from its solar cell. A stirring device disposed below the rack on the bottom of the cavity can be actuated to create flow of the solvent along a circulatory path upwardly through some of the chambers and downwardly through other of the chambers and generally parallel to a plane of attachment of the coverslide to the solar cell of each module in the chambers.

Abstract: A procedure for providing an overlay on a concrete slab or similar subsurface including the steps of placing a plurality of anchor holes into the concrete slab to be repaired and/or providing an anchor channel at its periphery, providing a bed of fibers on the exposed surface of said concrete slab and extending into and filling said anchor holes and/or channel, infiltrating a flowable cement slurry throughout the fibers and into the anchor holes and/or anchor channel, and curing the slurry to form an overlay which has integral fiber-reinforced anchor portions extending into the slab.

Abstract: Method and apparatus for repairing damaged tapered radar radomes. The method comprises the steps of preparing the damaged skin layers, affixing corresponding patches thereto and trimming same, where only the radome skin has been damaged, and, when both skin and core have been damaged, includes preparing the damaged skin layers and core, affixing an oversized repair core section in said prepared core, trimming the repair core section to an appropriate local configuration, affixing repair patches to the prepared skin layers and trimming same. An apparatus in practice of the present invention comprises a support affixable to the surface of the radome, at least one circumferential track device coupled to the support, at least one meridional track device coupled to the circumferential track device, and a router carriage assembly coupled to the meridional track device. A particular router device capable of precision vertical adjustment to 0.0005" is also disclosed for practice with the above apparatus.

Abstract: A method and apparatus for on-site repair and refinishing of building panels that have been discolored or worn is provided. In one embodiment, worn acoustical tiles are first removed from their installed location ceiling and worn parts are cut off. Replacement parts are then fitted to the remaining portion of the worn tile and adhesively attached. The repaired tile is then sprayed with adhesive and a sheet of decorative material is attached. Finally, the repaired tile with the decorative material attached is run through pinch rollers, resulting in a neat and secure bonding. The tile is then re-installed in its original location with the decorative material exposed.In another embodiment, a worn or discolored ceiling tile is removed from the ceiling and placed into a pre-fit, semi-rigid decorative covering. The tile and decorative covering are then replaced in the ceiling in the original position of the tile with the decorative covering exposed.

Abstract: A method for repairing damaged dashboards and similar articles is disclosed. The method comprises the steps of trimming away damaged material to form a repair area, substantially filling the repair area with an air drying repair compound, allowing said repair compound to air dry, adding a polyester resin to a plastisol material to produce a heat curable repair compound, applying the heat curable repair compound over the air drying repair compound and applying heat to the heat curable repair compound to cure it. The method produces a repair which closely matches the hardness of vinyl and similar plastic materials which are conventionally used to cover dashboards.

Abstract: A method of applying and repairing veneers and the like comprises the following steps:sticking a sheet to the outside surface of the veneer;unsticking the veneer from its support;sticking the sheet to a substantially rigid transparent plate;repairing the veneer and then resticking it to its original support.For applying a previously made up mosaic coating, a transparent temporary support plate is used enabling the composition to be offered up for visual inspection prior to final fixing.

Abstract: Disclosed is a repair kit apparatus and a method for repairing holes in drywalls, sheet-rock or gypsum board. The repair kit comprises a template having a saw guide or diagonal slot, one or more repair plugs, patching compound and instructions for effecting the method of repairing the drywall. The template is used to cut out a portion of the drywall about the damaged area, with the drywall being at a sloped angle or contoured inwardly. The repair plug has a peripheral sloped wall edge and is dimensioned for being insertable into the cutout with its sloped wall edges abutting the sloped or contoured wall portions defining the prepared drywall cutout. The repair plug may be mounted within the drywall cutout such that its outermost (face) surface is slightly recessed below the surface of the drywall. Next, patching compound may be applied over the repair plug to form a relatively flat smooth wall surface.

Abstract: An apparatus and process are provided for the production of plywood. The apparatus is adapted to form plywood panels without prior patching of defects in the veneer sheets used to form the panel. The formed panel then is electro-optically scanned to identify and locate defects. The sensed defect data is stored in a control unit which in turn directs a defect removal apparatus and a patcher to appropriate locations for removing and patching the defects.

Abstract: A method for effecting repairs of the damaged components of a machinery in he field which would otherwise require high temperature treatment of the damaged components to form a metal-oxide epoxy joint in a shop. The method includes preparing a repair patch which includes a metal sheet with the metal oxide layer thereon, applying a thin high performance protective coating thereover, covering thereof with a sacrificial backing sheet and then curing the adherent-top coat backing sheet to form a highly durable bonded system which can be stored until needed. At the time of repair the backing sheet is removed by sanding or grit blasting and the adherent is applied to the structure to be repaired under ordinary temperature conditions.

Abstract: The method of sealing and bonding faying surfaces of laminated graphite reinforced epoxy plates, including the steps of mixing an uncured epoxy resin with a filler of carbon microspheres, impregnating a layer of spaced glass fibers or cloth with the mixture, positioning the impregnated fibers between the faying surfaces of overlapping plates, fastening the plates together, and curing the resin. When it is necessary to repair the seal, the fasteners are removed and the plates are separated with a wedge at the seal bondline without damaging the plate laminations.

Abstract: A method for repairing ballistic impact damage to structural panels of vehicles comprising the steps of cutting out the damaged area in the panel in a preselected size circular cutout, bending a circular patch including an exterior circular metal sheet laminated to a smaller circular interior cloth layer to match the surface convolutions of the panel, impregnating the interior cloth layer with resin and attaching the patch to the panel. In this manner the patch is bent to fit before impregnation and is fixed to the bent shape by fixing the cloth layer.

Abstract: A vinyl repair compound and two step vinyl repair method provide an exceptionally strong and long wearing repair. The repair compound includes vinyl resins, a solvent, a plasticizer and silica filler, has a paste-like consistency and air dries. The repair process entails the following: trimming away the damaged material, placing backing material behind the damaged area if necessary, filling the repair area flush with the surface of the surrounding material with the repair compound and allowing it to air dry. Due to shrinkage of the compound as it dries, a depression is formed which is then filled with a conventional heat curable plastisol vinyl repair compound. If necessary, smooth or grained release paper is placed over the repair area, heat is applied to cure the plastisol compound and the repair is allowed to cool.

Abstract: A plate glass repair apparatus comprises a plate member that has an outer peripheral seal and can be held onto the surface of the plate glass to be repaired with vacuum generated from a self contained hand operated vacuum pump mounted on the plate. The plate is made so that the plate surface is forced down against the glass in locations sufficient to prevent the glass from being over stressed and for securely holding the tool in position. A cup like cutter for cutting a circular hole in the glass is positioned adjacent one corner of the plate and has a separate seal surrounding the cutter to form a chamber. Cutting fluid, such as water, is provided to flow from the outside of the cup like cutter toward the interior, where it is exhausted during the cutting operation. The cutter device for repairing plate glass is put into position over a break that is to be removed for plugging. Prior to cutting a backing plug is placed on the opposite face of the glass where the plug will be cut from the glass.

Abstract: This invention relates to a method and machine for removing at least one layer of reinforcing elements from a breaker or belt of a rubber tire.According to the method of the invention for removing at least one layer of reinforcing elements, such as steel cords, etc. from a breaker or belt located between the tread area and the carcass of a rubber tire; the tread area of the tire is first removed down to the layer of reinforcing elements by rasping off this tread area, and afterwards each reinforcing element, for example each steel cord, of the layer to be removed is cut through in at least one place and the so cut reinforcing elements are removed by further rasping.This invention further relates to a machine for carrying out this method.

Abstract: A wall repair kit includes a supporting member for disposition in back of an opening in the wall to be repaired. A mounting member is engageable with the supporting member for locating the supporting member in juxtaposition to the opening and locating means on the supporting member maintains the supporting member in operative relationship with said opening during the installation of the supporting member into permanent relationship with the opening.The present invention relates to a wall repair kit for utilization in repairing holes in walls, hollow door structures and the like. It also relates to the method of patching such holes by the utilization of the device.

Abstract: In repairing articles of natural rubber or elastomer predominantly of natural rubber with cured polymer or prepolymer (polyurethane/polyurea), adhering advantages are obtained especially at elevated temperatures when the damaged area is treated with halogen-containing oxidant dissolved in 1,2-dichloroethane instead of other solvents.

Abstract: Plaster core laminated wallboard is repaired or finished with a repair article comprising a substantially rigid steel plate having integral teeth forcibly insertable into the wallboard to hold the article in place over the damaged area, and a flexible cover portion formed of wallboard facing paper overlapping the edges of the plate and bonded thereto. The thickness of the paper cover portion may be tapered toward the outer edges thereof to form a smooth transition from the cover portion to the existing wallboard surface. Holes in the plate near the edges or corners thereof provide for increased contact of wallboard repair compound with the paper cover portion. The article may be formed in different configurations for covering plumbing openings, exterior corners and elongated stress cracks or seams.The wallboard is repaired by cutting a recess into and through the paper surface lamination of said wallboard to the outline of the plate portion of the repair article.

Abstract: Means and method for repairing an inflatable ball damaged to the extent that its ability to remain inflated has been impaired in which the method comprises the steps of removing a portion of the ball covering so as to permit the removal of the damaged bladder, if any, and the insertion of a new or replacement bladder; maintainably positioning the new or replacement bladder within the ball covering for ease of inflation thereof; and the restoring of the surface integrity of the ball cover while providing external access through the restored surface to the inflation valve of the new or replacement bladder. Apparatus has been disclosed for carrying forth the steps of the method and the end result of practicing the method is seen to be a manufacture comprising a repaired inflatable ball.

Abstract: A fabric repairing tool is provided with a cutter which is operable in a one-shot shearing operation to remove a portion of fabric from a folded piece of material held in the tool with a foldable clamp, and is further provided with heating means which is energizable to a controlled temperature effective in a desirable period of time to bond a thermoplastic pad and patch to a damaged fabric.

Abstract: A method for repairing heavy-duty tires which have experienced separation at the intersection between the tread and sidewall is provided. The method comprises the steps of removing the loose rubber surrounding the separated area, buffing the area to a smooth finish, applying a rubber adhesive to the buffed area, firmly applying a blanket of uncured rubber of approximately one-half inch thickness to the buffed area and curing the rubber to the carcass. Alternatively, a thin blanket of tread rubber may be applied over a thin blanket of cushion gum to a total thickness of applied rubber of approximately one-half inch.

Abstract: A method of coating uncoated portions of a coated optical fiber is disclosed. In this method a grooved split mold apparatus is used. This fiber, including coated portions of the fiber are placed within the groove and appropriately tensioned so as to prevent contact between the uncoated portions of the fiber and the mold. Injection molding techniques are then used to recoat the uncoated portions of the fiber.

Abstract: Surface defects in a cured, molded thermoset fiberglass reinforced (FRP) part can be repaired by filling the defect or void with an excess of a thermosetting conductive repair material, applying pressure and heat sufficient to cure said material without substantial shrinkage of said material, removing the pressure, cooling and finishing said parts to the original surface contour.

Abstract: A damaged area of a fabric is repaired by removing the damaged area from the fabric while folded across the damaged site, and thereafter bonding a patch and underlying thermoplastic impregnated pad to each other and to the fabric with the application of heat.

Abstract: A fabric repairing assembly is provided with an impact cutter which is operable by a plunger that is slidably mounted in an embracing housing. The assembly is further provided with a heater which includes a sleeve that slidably receives the said housing and wherein the housing can be moved to cause the plunger to press the heater against cloth undergoing repair.

Abstract: A product and method for making a patterned area in a pile rug in which pile yarn is carved out and removed to form a trough-like area, and one or more fabric pattern pieces having a total area and shape coinciding with the carved out trough-like area is inserted into the trough-like area and adhesively bonded in place. The top surface of the fabric pattern piece is distinct in either color, texture, material, or pattern from the main pile surface to produce contrasting patterns in the surface of the rug. The fabric pattern piece may be a separate pile strip including its own base fabric and pile yarn of different color, texture, material, height, or other distinguishing characteristics from the pile yarn of the main body of the rug. The method is particularly adapted for forming linear patterned insert pieces along the borders of an area pile rug.

Abstract: A method is disclosed for the repairing of extensive damage to plasterboard areas wherein wet plaster will normally not hold in such a large repair area. The method includes the cutting through the paper surface layer of the plasterboard material in an approximately circular shape around the damaged area. The exposed plaster of the plasterboard can then be sanded by such a tool as a power rotating sander such that the plaster within the plasterboard is removed to a predetermined depth. A plate member having a thickness less than this predetermined dimension and preferably on the order of 0.014 inches is then placed over the damaged area within the removed plaster area. This plate member is fixedly secured to the undamaged area of the plasterboard within the defined circular area. The plate member is preferably perforated throughout for ventilation and securement of plaster thereto.

Abstract: An improved process for repairing a damaged section of a bowling lane comprises removal of the upper planar surface of the bowling lane having the damaged portion therein, and subsequently resurfacing the section with a laminated structure of a specified thickness. Prior to the reinstallation of the section, the exposed substructure of the bowling lane is adjusted by reducing the height thereof, such that when the resurfaced section is replaced, it is flush with the remainder of the bowling lane. Finally, the entire bowling lane is resurfaced, preferably with a decorative laminate surface.

Abstract: A method for repairing grained or embossed vinyl sheeting with imprinted vinyl molds is provided, whereby the repaired area is grained or embossed in the original pattern without the application of pressure, thereby eliminating depression or deformation in the repaired vinyl sheeting.

Abstract: PCT No. PCT/US79/00666 Sec. 371 Date Aug. 30, 1979 Sec. 102(e) Date Aug. 30, 1979 PCT Filed Aug. 30, 1979 PCT Pub. No. WO81/00538 PCT Pub. Date Mar. 5, 1981This invention relates to a buffing tool (10, 10a) and method for preparing internal surface portions (14) of a tire (13) for application of a sealing patch thereto. A puncture (12) formed in a beadless tire (13), having a tread formed integrally therewith, is difficult to prepare for patching by use of conventional buffing tools and methods due to the mass of tightly wrapped reinforcing wires and multiple plies incorporated in the tire.

Abstract: A method and apparatus for repairing plastic and vinyl materials utilizes a heat curable repair compound and a hand tool which supplies a narrow jet of heated air. The hot air tool receives air at a constant low pressure from a regulated air supply and includes an electrical heating element which heats the air passing through it to a temperature sufficient to cure the repair compound. Damage to plastic and vinyl materials can thus be repaired by trimming the damaged area, filling the trimmed area with the heat curable compound, heating the compound with the jet of air from the tool and finally, texturing the surface by the application of graining paper to the patch.

Abstract: Methods of restoring or repairing damaged areas in the coating of high performance reflective glass composed of a thin, transparent film such as a metal and/or a metal oxide deposited on a vitreous substrate. Damages to the film such as scratches, abrasive rubs and the like are covered with a compatible filler to substantially restore the light transmittance characteristics. The repaired areas are covered with a protective coating to increase their durability.

Abstract: During the labeling of a vial, mislabeling can occur. The unwanted label is cleanly and economically removed by forcing the vial through a novel collet-cutter. The cutter has at least two cutting edges and two slots. The slots permit expansion of the diameter of the cutting edges during the passage of a vial. At least one of the edges of the slots is outwardly sharpened. Further, its cutting edges are at an angle to the incoming vial and have an internal diameter whereby the label is removed completely and cleanly when the vial is forced through the cutter.

Abstract: A process for refinishing the surface of a body of acrylo-butadiene-styrene (ABS) polymer by applying to the surface a coating material and treating the body with a solvent. The surface is cooled, together with at least the material underlying the surface, to a temperature in the range about 32.degree. F. to 40.degree. F. The surface of the body is then contacted with a solvent vapor for a time sufficient to reflow the surface but not to warm appreciably the inner layer of the body. The process avoids distortion in the refinished surface.

Abstract: A method for resurfacing a bowling alley to fill dents and overlie the original wood surface with an oil barrier layer over which is adhesively affixed a high pressure laminate material layer with an external surface having the appearance of the original surface of the alley.

Abstract: Ethylene-propylene-non-conjugated-diene rubber (EPDM) parts having a defective paint job can be stripped with 100 parts of a solution containing 50 to 99 parts of sulfuric acid, from about 0.1 to 10 parts of a surfactant and from about 0.9 to 49.9 parts of water. The stripped part can be effectively repainted with polyurethane enamel provided that the stripped part is not subjected to the normal pretreatment required in painting EPDM parts.

Abstract: A method for repairing panes of glass is provided which enables fractured panes to be strengthened and holes refilled while the pane remains installed in its support structure. The method comprises steps for relieving stress points in a fractured pane, and for applying substantially transparent materials for filling portions of the pane where glass has been removed or separated. The method enables repair of laminated glass panes as well as solid glass panes.