49results about How to "Increase shrinkage" patented technology

The present invention discloses clerodendranthus spiatus extract for treating urinary calculus and its preparation process, and belongs to the field of Chinese herbal medicine extract and application technology. The clerodendranthus spiatus extract preparing process includes the following steps: soaking clerodendranthus spiatus in 4-10 times methanol to extract and concentrating to obtain extractum; dissolving the extractum in solvent in the same volume; extracting the solution first with petroleum ether and then with ethyl acetate and concentrating to obtain coarse extract; and chromatographic separation, eluting, collecting and concentrating to operate clerodendranthus spiatus extract A. The clerodendranthus spiatus extract A is liposoluble flavone glycoside compound and has obvious urinary calculus treating effects.

Gastric banding devices, and drive systems designed to operate gastric banding devices, are disclosed. The gastric banding devices and drive systems intend to increase performance, durability, and simplicity over known gastric banding systems. Embodiments include transmission systems configured to output a variable force. Embodiments also include banding structures biased to apply a constrictive force to a patient's stomach. Supporting, or skeletal, structures are also disclosed. Various drive systems designed to improve power efficiency are also disclosed.

The invention relates to the technical field of furniture articles, in particular to an intelligent movable cabinet, comprising a cabinet body and a drawer. It also includes a drive unit, a motion unit, an air header and a controller. Through the drive unit, the motion unit and a flexible board, on the one hand, the cylinder block is controlled to move on the first passage by the first air cylinder, so that the cylindrical block squeezes the No.1 elastic plate, and the roller rolls on the No.2 channel under the mutual cooperation of the No.1 elastic plate, the roller, the fixing plate, the limit block and the movable bar, so that the movable bar pushes the drawer to slide, thereby realizing the opening or closing of the drawer, reducing the time consumed by the user and improving the userexperience; on the other hand, according to the files that the user needs to view, the corresponding drawer is opened automatically, and the gas is applied on the flexible board, so that the files areejected through the flexible board, thereby improving the user experience.

The invention discloses a hydraulic internal mold device for a concrete box girder. The device comprises a mold board system and a plurality of oil cylinders; the mold board system comprises a top mold and multiple moving molds sequentially distributed on the left side and the right side of the mold board system, the mold boards are connected through hinges to form an inner cavity shape of the box girder in an enclosing mode, and the oil cylinders are longitudinally hinged between every two mold boards. A connecting rod mechanism is hinged between every two adjacent moving molds, the connecting rod mechanisms and the moving molds hinged to the connecting rod mechanisms together form a multi-rod mechanism, the oil cylinders and the connecting rod mechanism which are arranged between every two adjacent moving molds are hinged into a whole, piston rods of the oil cylinders stretch out to enable the internal mold system to keep the inner cavity shape of the box girder, and the piston rods contract to enable the internal mold system to be closed in a folded mode. Due to the fact that the connecting rod mechanisms and the moving molds are hinged and both can rotate around the joints, strokes of the oil cylinders can be greatly shortened through application of the connecting rod mechanisms; accordingly, the mold board system can be folded and contracted in an inner cavity of the box girder in a large angle, and then one-time integrated demolding of the overall internal mold device can be successfully achieved.

The invention relates to the field of traditional Chinese medicines and particularly relates to a traditional Chinese medicine composition for treating postpartum fainting. The traditional Chinese medicine composition consists of the following components in parts by weight: herba leonuri, fresh ginger, red jujubes, Chinese ginseng, astragalus, white atractylodes rhizome, Chinese angelica, safflower, fructus lycii, radix paeoniae rubra, donkey-hide gelatin, ligusticum wallichii, radix curcumae, liquorice, lotus leaf, herba ecliptae, benzoin, polygonum multiflorum, peach kernels, prepared rehmannia root and rhizoma cyperi. The traditional Chinese medicine composition has the effects of promoting blood circulation to remove blood stasis, tonifying qi, regulating flow of qi and relieving pains, increasing uterine contraction amplitude, reducing postpartum hemorrhage, strengthening immunity of the body and improving the hematopoietic function of the body. The traditional Chinese medicine composition adopts a pure traditional Chinese medicine preparation, is safe and free of pollution, free of toxic and side effects, reasonable in formula, remarkable in curative effect, and free of adverse reaction, as well as toxic and side effects.

The present invention discloses a clerodendranthus spicatus extract capable of resisting urinary lithiasis and its preparation method, belonging to the field of Chinese medicinal material extract and application technology. Said method includes the following several steps: (1), mixing clerodendranthus spicatus and methyl alcohol according to the ratio of weight: volume=1:4-10, soaking, extracting and concentrating to obtain extract mixture; (2), mixing said extract mixture and dissolving liquor according to the ratio of weight:volume=1:1, dissolving; (3), firstly, using petroleum ether to extract the dissolved liquor, then using ethyl acetate to make secondary extraction, concentrating so as to obtain extract; and (4), making above-mentioned obtained extract undergo the processes of chromatography, elution, collection and concentration so as to obtain the invented cleodendranthus spicatus extract component A. Said cleodendranthus spicatus extract component A belongs to a fat-soluble flavone aglucone compound, said compound can be used for preparing the medicine with the functions of improving litholysis, promoting lithecbole, diuresis and relieving inflammation, etc.

The present invention discloses a clerodendranthus spicatus extract for resisting urinary lithiasis and its preparation method, belonging to the field of Chinese medicinal material extract and application technology. Said method includes the following steps: (1), soaking the cleodendranthus spicatus and methyl alcohol according to the ratio of weight:volume=1:4-10, extracting and concentrating so as to obtain extract mixture; (2), mixing said extract mixture and dissolving liquor according to the ratio of weight:volume=1:1 and dissolving; (3), firstly, using petroleum ether to extract said dissolved liquor, then using ethyl acetate to make secondary extraction, concentrating to obtain extract; and (4), making the above-mentioned obtained extract undergo the processes of chromatography, elution, collection and concentration so as to obtain the invented cleodendranthus spicatus extract component A. Said component A belongs to a fat-soluble flavone aglucone compound which can be used for preparing the medicine with the excellent effect for improving litholysis, promoting lithecbole, diuresis and relieving inflammation, etc.

The invention relates to a cleaning agent for non-setting adhesive and belongs to the field of daily chemical products. The cleaning agent has the beneficial effects that progressively-induced feedingis carried out on locust larvae, parietal cells are stimulated to secrete gastric acid, and the secretion of digestive function enzyme of locusts to adhesive powder and the reproduction amount of corresponding intestinal microorganisms are enhanced, so that the decomposing capability of the non-setting adhesive can be greatly improved; by a composition with biological cleaning components, external components of the non-setting adhesive can be firstly decomposed to form gaps, and by matching with a wetting agent, the permeating effect of other components can be greatly improved and the cleaning effect can be achieved; since the starch octenyl succinate structure in a composite emulsifying component has hydrophobic alkenyl long chains and hydrophilic carboxyl groups, the cleaning agent system for the non-setting adhesive is not easy to form gel or flocculate, so that good free fluidity and hydrophobicity of a pressure-sensitive adhesive system in the preparation process are improved, particle agglomeration of other components such as composite fillers is prevented, and the dispersing effect and the permeating effect of pressure-sensitive adhesive are improved; the problems of poor permeation effect and low cleaning efficiency of the currently common non-setting adhesive are solved.

The invention discloses a kidney tea anti-urinary calculus extract and a preparation method thereof, and belongs to the technical field of extracts and applications of Chinese herbal medicines. The method comprises: (1) soaking, extracting, and concentrating kidney tea and methanol at a weight: volume ratio of 1:4 to 10 to obtain an extract mixture; 1 proportion mixing and dissolving; (3) Extract the solution with petroleum ether first, then extract with ethyl acetate and concentrate to obtain the extract; (4) Chromatography, elute, collect and concentrate the extract to obtain the kidney tea extract Material A component. It is a fat-soluble flavonoid aglycone compound, which can significantly improve the symptoms of urinary stones, reduce the amount of stones, increase urine output, help stone discharge and anti-inflammatory effects. It can be directly, compounded or further separated and extracted, and can be used for anti-calculus, stone expulsion, diuretic and anti-inflammatory drugs in the urinary system.

The invention discloses an application of sodium butyrate in the preparation of hypoxic pulmonary hypertension control medicines. The sodium butyrate has an inhibition effect on the secretion of endothelin-1 of hypoxic endothelial cells and has a promotion effect on the secretion of NO in the hypoxic endothelial cells, so the hypoxic pulmonary hypertension disease is controlled. The sodium butyrate has the advantages of stable property, easy dissolving in aqueous solutions, direct oral taking after dissolving, convenient administration, convenient carrying, non-toxicity and harmlessness, and low price.

The invention relates to a polyester based on a polycondensation product of terephthalic acid and / or terephthalic acid derivatives comprising bivalent alcohols. Said polyester is characterised in that (I) between 40 and less than 90 mol. % of ethylene glycol, propane-1,3-diol and / or butane-1,4-diol is combined with (II) between 60 and more than 10 mol. % alkane-l,2-diol, exclusively ethylene glycol, and the polyester has a melting point of between approximately 145 and 250 DEG C (in accordance with DIN EN ISO 53765). It has a comparatively low melting point, such that it can be retreated at the lower melting temperature. This prevents undesired secondary and decomposition reactions during the retreatment, and enables energy costs to be reduced.; The inventive polyester is especially suitable for producing fibres or filaments by melt-spinning, and films, bottles and other moulded parts according to an injection moulding method. The fibres can be treated to form a high-quality nonwoven material.

The invention relates to a prevention and control method for reducing poison of alcohol and lactic acid in an intensive tobacco leaf baking process, which belongs to the technical field of blending of cured tobacco. The method comprises the following steps of: a, picking tobacco leaves in the morning of a clear day or rainless cloudy day, and not spraying water before the tobacco leaves are charged into a furnace; b, controlling tobacco loading density to be between 35 kg / m<3> and 45 kg / m<3>; c, controlling relative humidity of air in a curing barn to be between 90 percent and 75 percent and keeping the tobacco leaves at the temperature of 38 DEGC for 36 to 48 hours in a yellowing period; d, controlling the dry-bulb temperature to be between 51 DEG C and 53 DEG C and the wet-bulb temperature to be between 40 DEG C and 41 DEG C, and baking for 24 to 36 hours in a leaf drying period; and e, keeping a dehumidifying door slightly open by 2 to 3 percent in an entire tobacco leaf baking process, wherein the maximum opening of an air inlet door accounts for 70 percent of the total opening. In the method, other operating technologies are the same as those in the conventional baking method. The invention has the characteristic of low cost, easiness in learning, understanding and grasping, remarkable reduction in baking green smoke and black waste smoke, and increase in oil content of tobacco leaves, wrinkling degree and fragrance. The method is suitable for intensive tobacco leaf baking under different ecological environments in Chinese tobacco areas.

The present invention relates to a control cooling method for preventing high-carbon rod from producing self-breakage in its production process. Said method includes a control cooling process, and is characterized by that according to the deficiency of water cooling control after the rod is rolled, a reasonable temperature control range can be defined, before finishing rolling mill a pre-water-cooling equipment is added, so that the finishing rolling temperature can be reduced, and the austenite grain size can be further refined. Besides, before water tank a temperature-measuring device is added, so that the temperature range can be accurately controlled.

The invention relates to a constipation-treating Chinese medicinal composition, wherein the composition comprises white atractylodes rhizome, dried rehmannia root, and cimicifuga rhizome. The invention also relates to the process for preparing the composition, its use, and the medicament containing the composition as the active constituent.

The invention discloses a furan resin self-hardening heating insulated feeder and a preparation method thereof, and belongs to the field of casting. The problems that according to a traditional heating insulated feeder, heating is not enough, the insulation effect is poor, the requirement for high-quality castings is hard to meet, and the feeder has high feeding are solved. The feeder is prepared from aluminum powder, carbon dust, magnesium powder, nitrate, ferric oxide powder, sodium chloride, a mixture of vermiculite and expanded perlite, silica sand, furan resin and toluenesulfonic acid. The method comprises the steps of 1, weighing according to mass fractions; 2, blank mixing; 3, compaction molding in a feeder mold, and room temperature hardening. The feeder is used for casting.

The invention discloses a method for manufacturing a normal pressure reinforced wax mould head, which is characterized by comprising the steps of: 1, firstly manufacturing a discrete mould assembly; 2, pouring wax liquid at normal pressure and doping wax crumbs; and 3, cooling, taking away the discrete mould assembly to obtain the normal pressure reinforced wax mould head. Compared with the method for manufacturing the mould by adopting the discrete mould head assembly through splicing at normal pressure, the wave crumbs formed at high pressure are doped in the manufacture process, and have high density and strong adsorbability, the shrinkage depression degree of the wax liquid containing the wax crumbs is far less than that of the wax liquid without containing the wax crumbs, the strength of the wax mould is improved, and the wax crumbs ensure that the cooling speed of the mould head is increased and the production period is shortened.

The invention discloses a Rabdosia ternifolia sanitary napkin core sheet processing method. According to the present invention, the Rabdosia ternifolia sanitary napkin core sheet is prepared by usingcarboxyethyl germanium sesquioxide, dandelion, Rabdosia ternifolia, Leonurus artemisia, Cyperus rotundus L, Argy wormwood, silver ion and a compounded component dispersion liquid as raw materials through traditional and modern science refining, and has effects of meridian promoting, collateral activating, uterus warming, miscarriage preventing, blood circulation activating, blood stasis dissipating, blood circulation promoting, physiological function regulating, sterilizing, inflammation eliminating, liver and kidney protection, deodorizing, immunity improving, dysmenorrhea removing and the like.

The invention discloses a medicine for removing embryonic tissue residues and a preparation method of the medicine. The medicine is prepared from the following raw material medicines: immature bitter orange, carbonized human hair, motherwort herb, Szechwan raspberry, root of Korean raspberry, thlaspi arvense, beautiful sweetgum fruit, descolor cinquefoil herb, cherokee rose fruit, perfoliote knotweed herb, root of sinkiang arnebia, peach seed, Chinese angelica, ginseng, gynostemma pentaphyllum, common ginger, donkey-hide glue and licorice root. Various medicines are combined to ensure that blood stasis can be dispersed, pathogenic heat can be cleared, qi and blood can be replenished, and blood can be returned to meridians, and all medicines can play roles in activating blood and removing blood stasis, clearing heat and stopping bleeding, and nourishing blood and invigorating qi together; and the whole prescription can be used for relieving both primary and secondary symptoms, achieving tonification and purgation in combination, ensuring 'bleeding stopping in blood stasis dispersion', ensuring 'blood stasis dispersion in bleeding stopping', and achieving combined use in circulation and astringing so as to ensure that blood stasis cannot be remained in a bleeding stopping process and blood activation can be achieved without causing massive hemorrhage; and moreover, products with functions of reinforcing qi and nourishing blood are additionally provided so as to ensure that the effects of strengthening the body resistance and removing blood stasis, increasing the tension and motility of the uterine smooth muscles, enhancing the contraction amplitude of the uterine smooth muscles, removing the embryonic tissue residues after medical abortion, reducing the bleeding volume, shortening the vagina bleeding time are achieved, toxic or side effects are small and the safety is good.

The invention belongs to the technical field of traditional Chinese medicine, and discloses preparation and preliminary pharmaceutical evaluation methods of a compound qi-tonifying and intestine-moistening capsule. The compound qi-tonifying and intestine-moistening capsule is composed of fructus cannabis, semen pruni, raw radix astragali, radix codonopsis, fructus aurantii immaturus and radix polygonati officinalis. The preparation method of the compound qi-tonifying and intestine-moistening capsule comprises the following steps of: adding the fructus cannabis fine powder and the semen pruni fine powder into dry extract powder extracted from the raw radix astragali, the radix codonopsis, the radix polygonati officinalis and the fructus aurantii immaturus, granulating together, and after adding pectin, filling into a capsule shell so as to obtain the compound qi-tonifying and intestine-moistening capsule. According to the invention, the pectin is added, the pectin is basically not absorbed after entering the digestive tract, and the pectin forms jelly after absorbing water, so that not only can intestinal moisture be maintained, but also the volume of excreta in the large intestine can be increased so as to stimulate intestinal peristalsis to generate awareness of defecation and take the effect of promoting the medicine effect; and the compound qi-tonifying and intestine-moistening capsule has the effects of tonifying qi, nourishing yin, increasing liquid, moistening dryness, promoting the circulation of qi, removing stagnation and relaxing bowel, is conformity with constipation of gerontal patients, which is caused by deficiency of qi and yin, not only can relax the bowels, but also can improve the overall function of the patients, and takes the effect of treating diseases and solving the root cause.

The invention relates to non-woven fabric processing machinery, in particular to a non-woven fabric production device. The non-woven fabric production device comprises a base mounting frame, a fabricplacing mechanism, a fabric guiding mechanism, two tensioning mechanisms and a fabric winding mechanism. The fabric placing mechanism is rotatably mounted in a groove formed in the base mounting frame, and the fabric guiding mechanism is slidably mounted in the groove formed in the base mounting frame. The two tensioning mechanisms are fixedly installed at the two ends of the base mounting frame respectively, and the two ends of the fabric winding mechanism are rotationally installed in grooves formed in the different tensioning mechanisms respectively. The non-woven fabric production device has the advantages that the density of a non-woven fabric winding drum can be adjusted after rewinding, the rewinding density can be adjusted in the non-woven fabric rewinding operation, and the winding drum can be conveniently mounted and dismounted.

The invention relates to the field of application of waste concrete recycled aggregate to road water-stable layers, in particular to a mix proportion design method of cement-stabilized recycled macadam containing waste brick fine aggregate. The method comprises the following steps: screening the particle sizes of recycled concrete aggregate and waste brick fine aggregate; measuring indexes such as apparent relative density, sand equivalent and organic matter content of the recycled concrete aggregate and the waste brick fine aggregate; and replacing part of the recycled concrete fine aggregate with the waste brick fine aggregate, mixing according to a designed aggregate mixing ratio, and measuring technical indexes. The 7d unconfined compressive strength of the cement-stabilized regenerated crushed stone test part with the optimal replacement rate of the waste brick fine aggregate obtained by the mix proportion design method is 5.60 MPa, and the maximum dry density is 2.102 g / cm < 3 >.

The invention discloses an arm strength fitness equipment that adjusts weight according to the bending degree. The structure comprises a height and weight adjusting device, a cantilever beam, a steering wheel, a fixed adjusting rod, a rope, an adjusting connecting block, a connecting bolt, and a handle. The upper end of the height and weight adjusting device and the right end of the cantilever beam are fixed by the bolt, which has the beneficial effect that, in the later arm training, the weight control bolt and the weight connecting block can cooperate with each other to reduce the weight ofthe iron blocks in the second half of the arm bending process, so that the arm bending of will be completed, thereby improving the degree of contraction of the arm muscles during the bending, which leads to a better exercise effect by making the muscle peak of arm muscle more prominent. When an iron block is separated, it can be fixed in the air under the action of the suspension anti-drop device, so as to avoid damaging the equipment by falling blocks after weight reduction.

The invention provides a traditional Chinese medicine composition for treating ectopic pregnancy and a preparation method thereof, and relates to the technical field of medicine preparation. The traditional Chinese medicine composition comprises rhizoma sparganii, wild grape vines, cowherb seeds, curcuma zedoary, angelica sinensis, fructus aurantii, radix trichosanthis, spina gleditsiae, salvia miltiorrhiza, scalded leeches and pseudo-ginseng. The traditional Chinese medicine composition disclosed by the invention can quickly wither the gestational sac, then is discharged out of the body, and is used in the early stage of extrauterine pregnancy, namely when the fallopian tube is not broken. According to the preparation method of the traditional Chinese medicine composition, volatile oil is extracted from one part of medicinal materials by adopting a steam distillation method, effective components are extracted from the other part of medicinal materials by adopting a percolation method, so that active components capable of treating ectopic pregnancy in the medicinal materials are obtained, and the active components can be prevented from being damaged by extracting through different methods; and furthermore, the treatment effect of the medicine on ectopic pregnancy is better.

The invention relates to the technical field of aluminum-based composite materials, in particular to a preparation method of high-load and high-heat-resistant braided fiber-reinforced aluminum-based composite materials. It includes the following steps: preparing a fiber preform, and placing the fiber preform in a packaging mold; degumming: feeding liquid carbon dioxide into the packaging mold under pressure and temperature that make the carbon dioxide liquid, so that the liquid carbon dioxide is completely Immerse the fiber preform for 20-24 hours; expansion: adjust the pressure or / and temperature to gasify and release the liquid carbon dioxide; impregnation: place the packaging mold in a vacuum pressure infiltration device, and pass the molten liquid metal through Air pressure is used to impregnate the fiber preform into the packaging mold to obtain a composite material. This application utilizes the characteristic that the volume of liquid carbon dioxide increases when it changes into gas, so that the fiber prefabricated body expands, avoiding the problem of residual stress caused by different thermal expansion coefficients, thereby effectively increasing the load of the composite material.

The invention discloses a myocardial bionic scaffold made from a composite conducting material and a preparation method thereof. According to the preparation method disclosed by the invention, a graphene oxide-gelatin hydrogel bionic scaffold with a reinforced conducting performance is formed by compounding a conducting material graphene oxide with gelatine, and then crosslinking genipin without biotoxicity. The elasticity modulus of the bionic scaffold can be regulated and controlled by changing a crosslinking degree, and the mechanical properties of internal myocardium can be better simulated; meanwhile, the surface micro-structure of the scaffold is controllable and the conducting material, that is, graphene oxide is compounded, thus realizing simulation for an internal myocardium micro-environment, promoting the growth of myocardial cells, and forming a highly-ordered space structure and conduction for intercellular electrophysiological signals and contraction signals; and therefore, the growth of the myocardial cells can be promoted and the functions of the myocardial cells can be improved.

The invention relates to a pharmaceutical composition for treating post abortion colporrhagia and process for preparation, wherein the raw material medicaments include (by weight proportion) astragalus root 0.5-5 parts, motherwort 1-20 parts, rhizome of Sichuan lovage 0.5-15 parts and cattail pollen 0.5-15 parts.

The invention relates to the technical field of glass, in particular to a processing technology of a glass panel. Through glass pretreatment, annealing treatment and post-treatment, high-strength glass can be obtained through the annealing treatment, the glass substrate is cut into a proper shape to obtain glass slices through glass pretreatment, hydroxyl groups on the surface of the glass substrate are removed through cleaning, the polarity of the glass substrate is reduced, contamination of oil stains is reduced, and the service life of the glass substrate is prolonged. The surface of the glass substrate is kept clean. In the annealing treatment process, the glass slices are heated to 420-900 DEG C and then cooled, so that the surfaces of the glass slices are sharply shrunk to generate compressive stress, and tensile stress is formed in the middle of the glass slices, thereby improving the stress depth and stress degree of the tempered glass and obtaining higher strength. In post-treatment, through cleaning, printing and fingerprint removing treatment, the surface of the tempered glass is kept clean, the waterproof and oil-proof effects are achieved, and dust and fingerprints attached to the surface of the tempered glass are reduced.

The invention discloses a saline-alkali soil conditioner, and belongs to the field of soil improvement. The soil conditioner has good biocompatibility with high-pressure fat extraction, pulverizationand fermentation of pig bones, and bacterial cellulose has many hydroxyl groups which can chemically react with dopamine, carbomer and the like in the system to further improve the water retaining effect; NaHCO3 and Al2(SO4)3 added hierarchically can be stirred and geothermally treated during the use, wherein the aluminum hydroxide is an amphoteric metal hydroxide and can react with alkaline components in the saline-alkali soil to produce aluminum salts, so as to achieve the effect of reducing the alkalinity of soil; and the culture material for culturing locust improves the vitality of the stomach, has certain inducing effect on plant growth, and can promote plant growth and improve soil fertility. The saline-alkali soil conditioner solves the problems of poor water retaining property andpoor improvement effect of the conventional saline-alkali soil conditioner.

The invention discloses a driving method of electronic ink for display. The method comprises the steps of calculating the electrowetting ink driving voltage U of an electrowetting original, editing the electrowetting ink driving voltage U, and forming and loading a voltage waveform. Due to waveform characteristics of sine waves, the shrinkage stability of the electrowetting ink is improved. The maximum shrinkage degree of the electrowetting ink is effectively improved. The problems that ink droplets are easy to disperse and the shrinkage degree of the ink is low in the prior art are solved. The aperture opening ratio can be more accurately controlled. The movement shape of the ink is more effectively controlled, and the stability of the ink is improved. The maximization of the aperture opening ratio is realized.

A shrinking machine for fabrics (T) comprises: a flexible belt (2) for supporting and transporting a fabric (T), the flexible belt (2) being arranged in a closed loop around an inlet roller (4) and anoutlet roller (5); an intermediate body (7) of which a stretch (9) of the outer surface (8) identifies with a corresponding stretch (10) of the flexible belt (2) between the two rollers (4, 5) a sliding channel (11) for the fabric (T); a metal mesh (18) arranged in contact with the flexible belt (2) starting from a point corresponding to the inlet roller (4) and terminating at a point coincidingwith or following the inlet point (19) of the sliding channel (11).