Abstract: A method for forming and conditioning insulating felts of fibrous products whereby an insulating blanket is transported continuously on a transporting device, the insulating blanket is cut into a plurality of fiber strips, the fiber strips are driven by at least one branching-off and convergence device towards at least one reception conveyor, the fiber strips are superposed one on top of another so as to form at least one longitudinal stack, the at least one longitudinal stack is compressed by a compression device, and the compressed stack is cross cut to form the insulating felts. Such a method is implemented on a device including a transporting device, a longitudinal cutting device, at least one branching-off and convergence device, at least one reception conveyor, a compression device, and a cross-cutting device.

Abstract: A machine winds a fibrous mat on itself after compressing it. The winding machine has two bands which each embrace about half the circumference of the roll being formed. The machine also includes a plate intended to keep the mat compressed. This plate and, if appropriate, a device for causing compression of the mat are movable and advance downstream as the fibrous mat is wound. In a variation, the compression device is fixed and the plate is lengthened.

Abstract: A method and apparatus for compressing and packaging compressible materials. The compression is carried out continuously between parallel plates which come closer to each other as they advance. As the plates advance, the materials are accompanied by a lower packaging film and an upper packaging film which are joined at the sides of the compressed materials at the end of compression.

Abstract: A winder intended for compressing a fibrous mat 4 rolls the mat up on itself and wraps it so as to store it and transport it with a reduced bulk. The machine has two belts 1, 2 supported by two fixed rollers 9, 13 and two mobile rollers 14, 15. The tension of the belts and the position of the mobile rollers are managed by a computer. The winding speed and the admissible compression ratio without damaging the fibrous mat are better than with the winder of the prior art.

Abstract: An optical method continuously monitors the dimensions of a body having a parallelogram cross-section and supported on a moving conveyor. A first angular measurement of a first dimension of a first face of the body in a first direction is first performed, the first angular measurement being made with respect to a first reference angle at an apex of a first triangular plane having the first dimension as one side thereof. Substantially simultaneously with the step of determining the first angular measurement, a second angular measurement of a second dimension of a second face of the body in a second direction perpendicular to the first direction is determined, the second face intersecting the first face and the second angular measurement being made with respect to a second reference angle at an apex of a second triangular plane coplanar with the first triangular plane and having a second dimension as one side thereof.

Abstract: For producing mineral fiber mats, the flock emanating from the waste to be recycled is stored and classified according to density. Furthermore, the reintroduced quantities are precisely measured and the flock is caused to burst open. Thus it is possible to reintroduce substantially larger quantities without altering either the appearance or the characteristics of the product obtained.

Abstract: In the manufacture of insulating shells formed by a felt of mineral fibers wound around a mandrel, main pressing elements intervene as soon as the winding begins and remain in contact with the surface of the shell during the entire winding phase. Auxiliary pressing elements intervene only when the shell, during shaping, has reached a given outside diameter of, for example, 200 mm. The invention applies particularly to the insulation of conduits of small and average outside diameters.

Abstract: This invention relates to the heat treatment of thermally insulating fibrous materials, in particular envisaging the use of thermosetting resins as binders.The material is subjected to a field of ultra high frequency radiation, with the water content of said material and the intensity of the radiation field adjusted to suitable levels, and to a current of hot gas.This method of treatment provides a highly advantageous energy yield and very good homogeneity of the characteristics of the product. It is particularly suitable for insulating shells based on mineral fibre felt.

Abstract: For heat treating products having a substantially circular cross section and being composed of mineral fibers containing a binder in solution in water, a metal container impervious to microwaves and equipped with a conveyor device includes a source of hot gas which is directed to the surface of the product. The conveyor in the form of a movable belt and a ceiling of fixed plates cooperate to roll the products during transport through the container so that their displacement is half of the speed of the belt.

Abstract: In the manufacture of insulating shells formed by a felt of mineral fibers wound around a mandrel, main pressing elements intervene as soon as the winding begins and remain in contact with the surface of the shell during the entire winding phase. Auxiliary pressing elements intervent only when the shell, during shaping, has reached a given outside diameter of, for example, 200 mm. The process applies particularly to the insulation of conduits of small and average outside diameters.

Abstract: A method and apparatus for forming rolls of compressible materials such as a mineral wool felt, wherein the felt is rolled up in a space defined by a pair of conveyors and a compression roll. The position of at least one of these elements, particularly the compression roll, is varied during the course of winding, according to a preset program and as a function of the length of felt already rolled, in such a way as to produce a predetermined thickness in each turn of the rolled felt, whereby it is possible to achieve particularly more uniform compression over the entire length of the rolled up felt strip.