Abstract: The grafting reaction according to the invention occurs after having impregnated the polymeric material, on which were previously created free radicals by activation within an emulsion containing the fluorinated monomer and a graftable derivative of the morpholine. The preferred reagents are morpholinoethyl methacrylate and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl methacrylate. The invention is applicable to the waterproofing of textile articles, particularly made of cotton, silk, linen. The material thus grafted is waterproof when cold, but when hot, it may be washed, dyed or printed by transfer.

Abstract: The invention relates to solutions of cellulose destined to be extruded or spun, containing a tertiary amine oxide as solvent for the cellulose and in particular the N-oxide of N-methylmorpholine. It consists of using ammonium chloride or calcium chloride as additive in the preparation of these solutions.

Abstract: This invention relates to a device for drying, by micro-waves, the selvedge of an advancing flat material, particularly textile material, wherein it comprises a preferably rectangular waveguide of which one end terminates in a short circuit and the other by a bend for connection to the generator. The outer part of the bend, the contiguous face of the guide and the short circuit are provided with a single slot made along the median plane, through which is introduced the selvedge of the material inside the guide. The face of the guide opposite the slot comprises orifices connected via a chamber to a source of suction. Two lips, parallel to each other and to the median plane extend on either side of an all along the slot; their ends form a slight flare. These lips form a quarter-wave trap and facilitate introduction of the selvedge into the guide.

Abstract: Rough product constituted of a film of plastic material, such as a mono-drawn polyester film, presenting perforations of which the outlines form craters raised with respect to the surface of the film. This product may be obtained according to the needling technique.

Abstract: The invention consists in manually inserting a first piece of fabric (49) into the bottom portion of an edge guide comprising three superposed plates (2, 3, 4). The piece of fabric is pushed towards the end of the edge guide by means of jets of air until the side (51) of the piece along which sewing is to be performed is aligned with an end abutment. A dog (17) placed beneath the bottom plate (2) presses the piece of fabric (49) against the bottom face of the middle plate (3) and then displaces it along the sewing line direction until the other side (52) of the corner has reached a reference line (53). A second piece of fabric (54) is manually inserted and is positioned in the same way as the first by means of a dog (18) placed above the top plate (4). Once both of the pieces of fabric (49 and 54) are exactly superposed, the dogs (17, 18) drive them simultaneously at the same speed under the presser foot (47) of the sewing machine.

Abstract: The invention relates to the preparation of a stack of knitted fabric panels for subsequent cutting. It consists in spreading the knitted panels under extension over the needles of a needle table, covering the formed stack over with a sheet of material impervious to air, creating a reduced pressure inside the stack by sucking in the air contained between the table and the sheet, retracting the needles from the stack and proceeding to the cutting while keeping up the suction throughout the cutting operation.The needle table comprises a table top perforated with holes, a movable support on which are fixed the needles and a tight box containing the movable support and equipped with suction means.

Abstract: An alternating current with a frequency comprised between 1 MHz and 10 GHz is generated in a portion of the conductor element (38) limited by two short circuits (12, 13), thereby causing a heating by Joule effect of said conductor element portion. To generate said current, the electromagnetic energy emitted by the microwave or high-frequency generator (1) emitting at the selected frequency is electrically or magnetically coupled by means of an applicator (2, 7) to the conductor element portion acting as antenna tuned on the emission frequency of the generator (1). Application, among other things, to the homogeneous coating of a conductor element, for example based on carbon fibres, carrying a continuous element, for example based on carbon fibres, carrying a continuous or discontinuous coating of thermoplastic material susceptible of heating and melting by thermal conduction.

Abstract: The method for relaxing knitted fabrics according to the invention uses humidity, heat and agitation of the fabric. Said agitation is caused by projecting the fast-advancing fabric against a rigid support on which the then nontensioned fabric piles up.The projection of the knitted fabric is obtained by driving said fabric by friction and without slipping, by means of a movable element of projection into the outlet zone from which the fabric is projected against a receiving zone of the support, which receiving zone is situated close to the outlet zone of the projecting element and substantially transversely to the direction of projection.The movable element of projection is a movable belt turning over two cylinders of which one at least is a driving cylinder, whose driving speed can reach 600 meters/minute.

Abstract: An installation for linear treatment, such as the edging of textile pieces. It comprises a sewing machine, equipped with a feed dog/presser foot system, a work table which supports the piece during edging, a detection device and two recentering means controlled together or independently of each other by the instructions given by the detection device. The two recentering means consist, on the one hand, of an active guide placed immediately in front of the presser foot and ensuring displacement of that part of the piece located near the presser foot, substantially transversely with respect to the line of stitching, and, on the other hand, of a mobile support placed upstream of the active guide presenting a mobile flat surface, on the same plane as the work table.

Abstract: Transfer and positioning apparatus including a vertically adjustable table, a workpiece introducing belt adapted to slidably move an underlying workpiece into a first location on the table. At the first location, the workpiece is engaged by fingers which depress the table to disengage the workpiece from the belt and subsequently move the workpiece across the table to a second location while changing the direction and orientation of the workpiece. At the second station, the fingers are elevated, allowing an elevation of the table and an engagement of the workpiece with a second belt which in turn slides the workpiece from the table to a second station.

Abstract: The temperature of a planar material (8) moving down a process path is measured by causing the material to pass through two openings (3,4) made in a waveguide (1) in such a way that the material effectively does not cut the electric field lines present on the walls of the guide (1) and also so the material (8) passes through the guide in a direction generally parallel to the electric field in the propagation mode of the waveguide and through a region of maximum field strength. The temperature of the planar material (8) is determined by measuring the thermal noise emitted by the material (8) as it passes through the slotted waveguide (1). The slots (3,4) for a rectangular waveguide operating in the TE.sub.10 mode are made along the centerline of the two broad sides of the guide.

Abstract: The process consists firstly in adding, to the solution, an excess of a polyelectrolyte capable of forming an ionic association with the dissolved substance which it is desired to retain, and then in bringing the solution thus obtained into contact with a material possessing ionic groups which retain the polyelectrolyte by virtue of its ionic groups not associated with the said substance. The solution and the material can be brought into contact either by filtration or by tangential bathing. The polyelectrolyte can be retained either by ion exchange or by a charge repulsion effect.The material is advantageously a fibrous material of which the ionic groups are obtained by grafting.

Abstract: The present invention relates to the treatments, particularly in a gaseous medium, of textile articles accumulated in folds and moving under the effect of their own weight along an inclined surface. According to the process of the invention, the displacement of the article is accompanied by a mobile surface in contact with the upper part of the folds formed by the article; this mobile surface is driven so that it moves at a speed approximately equal to that of the article when said article slides normally along the inclined surface. The mobile surface consits of an endless belt whose outer surface, in contact with the upper face of the folds formed by the article, is at a constant distance from the inclined wall.

Abstract: This invention relates to an improved device for measuring the length of yarn absorbed by a textile machine, comprising in known manner a rotating member driven by the yarn during displacement thereof. It presents three fixed guides over which the yarn passes and which are positioned near the rotating member so that the yarn is in contact with the rotating member along two substantially equal arcs of low value, for example from 20.degree. to 50.degree. and advantageously 30.degree.. The device is more particularly applicable to measuring the length of yarn absorbed per stitch on flat knitting machines.

Abstract: A device for regulating the length of thread absrobed by a knitting machine and/or for correcting the variations in tension of a thread supplying a textile machine, is disclosed. The device comprises a tensioning means of any type, a drive member whose rotation results in the movement of the tension-generating member of the tensioning means, a feeler element over which the thread passes and which is moved when the length of thread absorbed and/or the tension of the thread varies and two switches, one controlling the placing in rotation of the drive member in one direction and the other the placing in rotation in the other direction. The direction of rotation of the drive member is selected so that the corelative action of the feeler corrects the variation in the length of thread absorbed and/or of the tension which is the cause of triggering this rotation.

Abstract: The invention relates to an element permitting to simultaneously wash in the same bath two types of textile articles, the articles of the first type being dyed with dyes liable to run in the washing bath and to settle on the articles of the second type. The element according to the invention is in the form of a filtering envelope inside which one of the types of textile articles is enclosed, the envelope being made in a material having more tinctorial affinity towards the dyes liable to run in the bath than the articles of the second type.

Abstract: The present invention relates to a method and apparatus for processing rectangular pieces of fabric wherein the piece of fabric is moved in a first direction until the front edge reaches and is held in a predetermined front position, whereas the remaining part of said piece continues to move in said first direction until the rear edge reaches and is held in a predetermined rear position. The piece is thereafter moved in a second position while the front and rear edges are kept apart at a predetermined distance, and the aforesaid edges are hemmed simultaneously by hemming machines. The method and device according to the invention are used for hemming pieces having two parallel edges, and in particular rectangular pieces cut from a continuous web of fabric, such as for example floor cloths.

Abstract: Process and apparatus for reducing the liquid content of a porous material by means of superheated vapor from said liquid. The apparatus comprises, in order: a vapor generator 1; a circulation fan 2; a vapor superheater 6; a closed, sealed chamber 7, and an assembley 22-26 to provide in the chamber 7 a passage for fluid and for supporting textile material 9 such that it is interposed in the path of the vapor; a vapor condenser 13; a valve for regulation of pressure 16; a conduit for recycling vapor 17, and a device 32, 32a to measure the temperature prevailing in the fluid passage upstream of the porous material.

Abstract: The present invention relates to a continuous method and device for obtaining from a long length of tubular knitted element, a sleeve with a turned back edge.The method consists in guiding the knitting by way of a tubular guide, with one end of said element projecting from the said guide, in turning back said projecting part by means of air jets and lateral gripping tongs, and in pulling forward the whole knitted element and cutting across the said element with a knife.The invention finds a particular application in the production of garment elements or trimmings, such as wrist-bands for gloves, cuffs for sleeves or polar necks.

Abstract: A tube of flexible material moving longitudinally undergoes transition between annular cross section and flattened straight cross section, without change in the length of perimeter of its cross sections, by one stage of changing between the annular cross section and a rectangular cross section, and another stage of changing between that rectangular cross section and the flattened cross section through successively longer and narrower rectangular cross sections. The method is applicable to material produced by a circular knitting machine. Preferably there is a polyhedral guide within the tube.