122) regardless of the elongation of each individual belt over time and to keep the interposed laminar products perfectly flat, stretched and free from creases and unevenness during advancement thereof.
An adaptive staking machine (1) for softening and stretching flexible laminar products, such as leather and hides, which comprises a base (2) defining a longitudinal axis (L) and having an inlet area (3) for the products to be treated and an outlet area (4) for the treated products, on the base there are mounted at least one pair of beating plates (6, 7) which are mutually facing and configured to act on the opposite faces of the products to be treated, at least one of said plates (6) being fixed and the other (7) movable and associated with drive means, advancement means (5) for the advancement of the products comprising at least one upper elastic belt (8) and at least one lower elastic belt (9), arranged mutually facing and interposed between the pair of beating plates (6, 7), each of said elastic belts (8, 9) having an annular development and being wound on at least one pair of upper end rollers (10, 11) and one pair of lower end rollers (12, 13) with axes perpendicular to the longitudinal direction. The machine comprises an automatic adaptive adjustment system (16, 17) for adjusting the tension (T) of each of the elastic belts (8, 9) and configured to recover the elongation of each individual belt over time and maintain the interposed laminar products perfectly flat, stretched and free from creases and unevenness during advancement and treatment thereof.
A radio frequency generator (1) for thermal treatment comprising a plurality of compartments (3) for containing at least one triode (2), a grid feedback circuit (20, 21), the grid inductance (4) of the triode (2), an LC oscillating circuit (5), a variable capacitor (6), a filament transformer (7) for the triode (2) and at least one high direct voltage generator (8). Each containment compartment (3) has a differentiated atmospheric pressure in order to avoid the presence of air flows which can spread particles from the external environment to the compartments (3) and avoid air ionization phenomena and/or the generation of unwanted thermal electric arcs.
A belt-changing tool (1) adapted to be coupled to a machine (2) for processing flexible sheet products, wherein the machine (2) comprises a frame (3) defining an inlet area (4) and an outlet area (5) for the products, the frame (3) having at least one pair of closed-loop conveyor belts (6, 7) installed thereon, which face each other and are supported by pairs of end rollers (8, 9; 10, 11 ). The tool (1 ) comprises a first extending device (20) and a second extending device (20') each having a head (21, 21') slidingly mounted on longitudinal guide means (23, 23'), which are designed to be secured to the frame (3) and at least one transverse grip member (26, 26') associated with the head (21, 21') for engaging a first portion (27, 27') of a belt (6, 7), whose second portion, opposite to the first portion (27), is wound on an end roller (9, 11 ). Drive means (29, 29') are also provided, which act upon the head (21, 21') to longitudinally move it along the guide means (23, 23') thereby stretching the belt (6, 7) and allowing the first portion (27, 27') of the belt (6, 7) to transversely slide on the adjacent end roller (8, 10) with little manual effort. A method of changing conveyor belts (6, 7) of a staking machine (2) for softening and stretching industrial hides, using the tool (1).
C14B 17/14 - Auxiliary devices for leather-working machines, e.g. grinding devices for blading cylinders or dust-removal devices combined with the working machines
F16H 7/24 - Equipment for mounting belts, ropes, or chains
5.
METHOD FOR MANAGING A RADIOFREQUENCY SYSTEM FOR THERMAL TREATMENT OF DIELECTRIC AND/OR ELECTRICALLY CONDUCTIVE MATERIALS
A method for managing a radiofrequency system (1; 201; 301; 401; 501; 601; 701 ) for thermal treatment of a dielectric and/or electrically conductive material (M), said system (1; 201; 301; 401; 501; 601; 701 ) comprising at least one electric generator (10; 110; 710) adapted to generate a radiofrequency output signal at an output power and applicator means (80; 180; 680) connected to the electric generator (10; 110; 710), adapted to develop an electromagnetic field at a receiving zone (Z) of the dielectric and/or electrically conductive material (M), wherein the electric generator (10; 110; 710) in turn comprises at least one generating unit (12) of radiofrequency drive signals at a first power level, amplification means (30; 130) adapted to amplify the radiofrequency drive signals of the generating unit (12) from the first power level to the output power, the amplification means (30; 130) comprising one or more amplification stages (30a, 30b, 30c; 130a), each of which comprises at least one solid-state active electronic component (50), and control means (90) adapted to receive at least a first electrical and/or physical parameter indicative of the output power of the electric generator (10; 110; 710) during operation. In particular, the method comprises the steps of operating the radiofrequency signal generating unit (12) to generate a drive signal at a first power level according to a predetermined trend to obtain a predetermined desired trend of said output power to control the amount of power delivered in the process, acquiring and processing the at least a first parameter to identify a deviation in the output power with respect to the predetermined desired trend, and acting on at least one operating parameter of the system (1; 201; 301; 401; 501; 601; 701) through the control means (90) to obtain the predetermined desired trend of the output power.
A combined machine (1) for the thermic drying treatment of dielectric products (D) comprising: a box-like casing (2) which defines a process chamber or cavity (3) adapted to receive a dielectric product (D) placed on support means and to be thermally treated to obtain the drying thereof, and pumping means (4) operatively connected to the box-like casing (2) and adapted to be operated to create vacuum conditions inside the process chamber or cavity (3) in the presence of the dielectric product (D). In particular, the combined machine (1) comprises an electric generator (5) adapted to generate a radio frequency output signal, at the desired output power, and applicator means (6), contained in the process chamber or cavity (3) and electrically connected with the electric generator (5), adapted to develop an electromagnetic field at a treatment zone (7) of the dielectric product (D) defined in the process chamber or cavity (3) for heating the dielectric product (D) itself.
A drying plant (1) for drying pretreated flexible sheet products, having at least one side on which a layer of a chemical compound has previously been deposited, said system (1) comprising feeding means (2) for feeding the sheet products in a direction (L), drying means (3) for drying the products as they are being fed, which have at least open operating unit (5) with a chamber (6) through which the feeding means (2) are designed to pass, and with at least one applicator (10) connected to a respective generator (11) for application of an alternating electromagnetic field in the RF range and a control unit (1 6), for controlling the generator (11) and/or the applicator (10). The field has an oscillation frequency that ranges from 300 kHz to 300MHz and is preferably 27.12 MHz at least one air blowing means (18) (18) for delivering hot air and/or at least one suction means (19) are provided. The control unit (16) is configured to change the speed of the feeding means (2) or to change the electromagnetic field application time. Sensor means are further provided, for detecting one or more physical and/or thermodynamic parameters of the operating unit (5) and the temperature of the sheet and for controlling the means (2, 18, 19) separately from or in combination with each other and carry out complete drying of the chemical compound layer.
An improved staking machine (1) for softening and stretching flexible sheet products, such as industrial hides and the like having opposite sides, which comprises motorized feeding means (5) for conveying the products in a predetermined longitudinal direction (L), at least one pair of mutually facing beating plates (10, 10'), substantially parallel to the feeding means (5) and acting on the opposite faces of the products. One of the plates (10) is stationary and the other (10') is movable and connected to motor means (11) which impart a reciprocating movement thereto, with a predetermined number of beats per minute. The machine (1) comprises means (23) for adjusting the working pressure between the stationary plate (10) and the movable plate (10'), which selectively act on the stationary plate (10) to change the mutual distance between the stationary plate (10) and the movable plate (10'). The machine (1) further comprises electronic control means (24) which act on the motor means (11) to continuously change the number of beats per minute of the reciprocating motion of the movable plate (10') both during initial start-up and during steady-state operation according to the type of product to be treated and the characteristics of the desired products.
A plant (1) for drying and solid state polycondensing a moisture-containing polymeric material (M) in granular form, comprising a conduit (2) for feeding the material to be treated in a longitudinal direction (L), at least one treatment zone (7) for treating the polymeric material, means (6) for blowing an inert gas into the conduit, radiating means (8) for emitting an alternating electromagnetic field in the radio-frequency band and comprising a plurality of applicators (9) located in correspondence of said treatment zone and external to the conduit in longitudinally offset positions; said applicators are connected to the terminals of an electromagnetic wave generator (10) and comprise pairs of opposed radiating elements (11, 11') which are adapted to generate an alternating electromagnetic field in the conduit; the pairs of radiating elements defining magnetic dipoles with opposite polarities along the conduit. Further claimed is a method of drying and solid state polycondensing a polymeric material in granular form obtained by polycondensation using the plant.
B29B 13/08 - Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
B01J 8/08 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles
B01J 19/12 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor employing electromagnetic waves
B01J 19/22 - Stationary reactors having moving elements inside in the form of endless belts
B01J 8/12 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by gravity in a downward flow
B29C 35/08 - Heating or curing, e.g. crosslinking or vulcanising by wave energy or particle radiation
A vacuum drier (1 ) for drying industrial hides (P), comprises: a body having a bearing structure (2) a pair of end uprights (4), substantially vertical guide means, a lower base (6) and an upper cover (7), a plurality of tables (12) for supporting the hides (P) which are adapted to be peripherally and sealingly coupled to define vacuum chambers (15); drive means for vertically moving the tables (12) along the guide means, which are connected to a power unit (16), heating means for the tables (12) for heating the hides, connected to a hydraulic station (17), vacuum means (26) adapted for selective connection to the tables (12) for drawing vapors released from the hides (P), control means (29) for controlling the drive means, the heating means and the vacuum means (26), a suction line for connecting the chambers with the vacuum means (26), a vapor manifold (30) and connection tubing (31). The vacuum means (26), the power unit (16), the hydraulic station (17) and the control means (29) are mounted to the bearing structure (2) in the plan projection of the body. The vapor manifold (30) is directly mounted to an upright (4) near the tables (12).
A method of drying hides (P) during the finishing process. The finishing process comprises at least one first step a) of depositing a first layer (S') of liquid coating or finishing mixture on the hides (P), possibly followed by a second step c) of depositing a second layer of a fixing agent (S") on the first layer (S'). Drying comprises a first step b) of irradiating the first finishing layer (S') with an alternating electromagnetic field whose frequency is within the RF range, for substantially complete drying of the first layer (S'), followed by a second step d) of irradiating the second layer of fixing agent (S") deposited in said second deposition step c). An apparatus for drying hides (P) during the finishing process, which is designed to be located in a leather finishing plant (R) comprises a shielding tunnel (2), having therein a moving transfer surface (5) for feeding the hides in a predetermined direction (V) and an electromagnetic wave irradiator (8) for irradiating waves in the RF range, which is directed toward the surface of the hides (P) coated with the layers (S', S").
A device for generating an alternating radio-frequency electromagnetic field in a working area (3) comprises an applicator (2) for emitting the electromagnetic field in the working area (3), an oscillator (4) for providing an alternate voltage (VRF) and electric current (IRF) having a predetermined value and a predetermined frequency to the applicator (2), power supply means (5) for supplying a substantially DC voltage (VCC) to the oscillator (4), control means (6) associated with the power supply means (5) for controlling the electrical parameters of the AC voltage, the AC current and/or the frequency provided to the applicator (2) by the oscillator (4). The control means (6) comprise an input port (7) connected to the electric power network (N), a first electronic control circuit (8) which is connected to the input port (7) for substantially instantaneously varying the electrical parameters and instantaneous control of the field emission power, a second electronic control circuit (10) for regulating the operation of the oscillator (4). The first electronic circuit (8) has an output (9) connected to the power supply means (5). A plant comprises the device and a control method for the device.
A23L 3/01 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
A plant for sanitization of flours, grains and similar products comprises a feed line (2) for feeding the products to be treated, first treatment means (3) for reducing the relative moisture content in the product to be treated, second treatment means (4) for reducing the total mycotoxin content in the product to the treated, wherein the second treatment means (4) comprise an applicator device (5) which is adapted to generate an alternate magnetic field whose frequency falls within the radiofrequency range and to direct the field toward the feed line (2). A method of sanitizing flours, grains and similar products.
A23L 3/01 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
A23L 3/18 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials while they are progressively transported through the apparatus
A23B 9/04 - Preserving by heating by irradiation or electric treatment
A23B 9/06 - Preserving by irradiation or electric treatment without heating effect
An extruder apparatus for treatment of civil, industrial and/or animal sludge comprises a load-bearing frame (2) having a feed conduit (3) with an inlet (4) for the sludge to be treated and an outlet (5) for the treated sludge, means (6) for feeding the sludge from the inlet (4) to the outlet (5) of the conduit (3), extrusion means (7) for extruding sludge into a plurality of substantially thread-like extruded elements through the outlet (5), sludge crushing means (8), which are housed in the conduit (3) upstream from the extrusion means (7) to reduce their particle size from a maximum starting value to a minimum final value, thereby preventing the formation of compacted sludge lumps.
The present invention relates to a plant for decontaminating cured food products (P) comprising a treatment chamber (2) having an inlet port (3) for the products to be treated (Pi) and an outlet port (4) for the treated products (Po) and enclosing therewithin, at least partially, an electromagnetic wave generator (5) designed to generate an electromagnetic field to irradiate the products (P) present and bring them up to a first heating predetermined temperature (T1) which is lower than the cooking temperature (Tc) for the products (P) to be treated, and means of surface treatment (6) for the products (P) using hot air having a second predetermined temperature (T2), which comprise a hot air generator (7) designed to generate a high-speed hot-air jet directed onto the surface of the products (P) in order to remove the parasite nesting in the surface layers thereof both mechanically and thermally. A method for decontaminating cured food products (P) implementable with the aforesaid plant (1).
A23L 3/005 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment
A23L 3/01 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating using irradiation or electric treatment using microwaves or dielectric heating
A23L 3/16 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials
A23B 4/01 - Preserving by heating by irradiation or electric treatment
A23L 3/18 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials while they are progressively transported through the apparatus
A device for printing industrial hides comprises a drying chamber (2) internally housing a support surface (3) for at least one hide (P), a cover (10) placed on the top of the support surface (3) in order to define the drying chamber (2), heating means (6) associated with the support surface (3) in order to bring it to a drying temperature, an impermeable flexible membrane (14) placed on the top of the support surface (3) to divide the chamber (2) into an upper portion (21) and a lower portion (2"), pressure means (13) of vacuum type with a suction line (15) connected to the lower portion (2") of the chamber (2) in order to define a pressure difference between the portions (21, 2") of the chamber (2). The drying chamber (2) internally comprises at least one matrix (4) positioned on the surface (3) and having an upper surface (5) reproducing in negative a pattern to be printed on the hide (P). The vacuum pressure means (13) comprise one or more suction passages (17) made in the support surface (3) in a position substantially facing the cover (10) in order to fluidly connect the lower portion (2") with the suction line (15) and to promote the compression of the hide (P) on the matrix (4) for the printing of the ornamental pattern.
A plant for pasteurizing an egg-containing food product comprises a heating section (3) for heating the product to a first operating temperature (T1) above 5O0C1 an overheating station (4) for overheating the product to a second operating temperature (T2) higher than the first operating temperature (T1), oscillating means (18) for generating a radio-frequency electromagnetic field in the overheating station (4), at least one conduit (6) having an inlet (2) and an outlet (5) and at least a connecting portion (16) for connecting together said heating section (3) and said overheating station (4), at least one first thermal holding station (15) in said intermediate portion (16), means (8) for circulating the product in said conduit (6). The circulating means (8) are adapted to circulate the product in said overheating station (4) at a second operating speed (V2) in a substantially turbulent regime for a maximum operating time (t2) of 0.1 s to 5 s, for the second operating temperature (T2) to fall in a range from 55°C to 75°C.
A staking machine with beating plates for industrial hides and similar products comprises a bed (2) supporting one or more operating heads (3, 5). Each head comprises a fixed plate (5) and a moving plate (3) which face each other and are provided with complementarily shaped tools adapted to interact for exerting a working pressure (Pw) therebetween, The fixed plate (5) is integral with a beam (12) installed on substantially vertical posts (13) having threaded portions that can be screwed in complementarily threaded bushes (14) which are integral with the bed (2). Each post (13) has an upper operating end (18) which operates on the beam (12). Working pressure adjustment means (19) are further provided which selectively operate on the operating ends (18) to change the distance (d) between the fixed plate (5) and the moving plate (3), to lock the latter in the desired position as a function of a desired staking pressure (Pws). The machine further comprises antifriction means (24) between the operating end (18) and the beam (12).
patents
