EVN –High-speed belt bucket elevator

High speed belt bucket elevator. Bucket Elevator with rubber belt to which buckets are connected. The main features of the elevator include the following: - standard dimensions in conformity to DIN specifications, or increased width for larger elevators. - Buckets with either standard capacity according to DIN 15234 specifications or increased capacity, equipped with a series of holes on the rear end for connecting the buckets to the belt fixing bolts; - Standard drive pulley lagged with a layer of vulcanised rubber, with a bulging surface. Alternatively, a pulley with interchangeable lagged segments can be supplied - Squirrel-cage return pulley with double-cone structure and drilled discs for laterally discharging any material impacting against it. - Rubber belt with textile or steel cord structure - Mechanically-joined belt ends. - Tangential feed inlet on idle station - Tangential discharge outlet on drive station Standard tensioning system with pair of threaded bars and adjustment nuts. Alternatively, a parallel tensioning system with counterweight can be installed Type of discharge: tangential - centrifugal

SURFACE FEEDER

Used for receiving various types of loose material unloaded from trucks through a small ramp or from mechanical shovels and placed at the tail end of these machines at floor-level. Moreover, these receiving units can also be used for feeding conveying and processing plants. This extractor is similar to the EP extractor but its metal deck is surmounted by a rubber belt. The metal deck is formed by spaced out rigid pans with hollow profile that are driven by Link chains connected to the side walls. The pans are surmounted by a rubber belt that constitutes the actual support surface of the material being conveyed.This machine combines the sturdiness of metal apron feeders with the cleanliness of rubber belts that seals all potential spillage points for even the finest-grained materials. Any changes can be carried out at low cost It can easily be transformed into a mobile machine if equipped with the apppropriate wheel units and towing brackets. This means that a single machine can be used at various discharge points and at different plants, yielding clear financial benefits. This kind of versatility is particularly sought-after and appreciated for ports applicatgions. In order to contain the levels of dust emitted by certain materials, a fully enclosing cover may be mounted on the upper section of the machine, in addition to flexible covers to protect the entrance point of the lorry and a dust filter positioned above the discharge zone.

ESPLV - High-speed continuous bucket elevator

High-speed continuous bucket elevator, with doble chains connected to bucket sides. Suitable for handling very large capacities (up to 1,500 m3/h or more). Can also be used at medium speeds similarly to those used on ESP Bucket elevators; part of the material is discharged by flowing onto the back of the preceding bucket. When used at medium speed, medium-sized materials can be lifted (70 - 80 mm). Elevator with chains connecting buckets that are driven by toothed wheels.

SCREW CONVEYORS

Our product range includes various types of screw conveyors used in various sectors and in the pre-mixed product, lime, gypsum, steelworks, mining, chemical and power station sectors etc. Screw conveyors are also widely used for recovering and conveying dust in dust-filtering ecological plants, in any sector. The Gambarotta Gschwendt product range includes various types of screw conveyors that can be divided into two main groups, namely: CO - Horizontal screw conveyors: generally used for powdered materials or small-sized material to be conveyed horizontally or with slight inclination (which may however reach 45° or more). CV - Vertical screw conveyors: used for vertically lifting fine-grained material (also known as screw elevators). Gambarotta Gschwendt is able to revamp, modify and enhance screw conveyors of any manufacturer and solve any problem regarding handling of continuous flowing bulk material.

PAN CONVEYORS

Our product range includes several types of conveyors to convey clinker as well as any other bulk material. TP - Pan conveyors: generally used for conveying material with maximum 28° inclination. TPT – Pan conveyors with baffles: suitable for conveying material with inclination above 28°. TC - Box conveyors: generally used for conveying material with inclination above 40°. TTP - Deep bucket conveyors: suitable for conveying material with inclination up to 60°. TPL - Pivoting pan conveyors: suitable for horizontal conveying with multiple intermediate discharge points

DRAG CHAIN CONVEYORS

Our product range includes several types of drag conveyors: TRS - Drag chain conveyor with single drop forged chain: suitable for hauling fine-grained or small-sized material and relatively small capacities with any inclination (even up to 90°). TRD - Drag chain conveyor with double drop forged chain: suitable for hauling lumps and medium-large capacities, generally with inclination < 20°. TRA - Drag chain conveyor with double round steel chain: suitable for the same uses as the TRD, with the added advantage of having a lower vertical extension. TRP - Scraper-paddle conveyor with double chain with rollers: suitable for the same uses as the TRD, but can be operated at high speeds (0.7 m/sec) thanks to the mobile parts supported by the chain rollers that roll on guides. TRC - Submerged drag chain conveyor: suitable for recovering slag and ash immersed in water as a result of various industrial processes (e.g. extinguishing of boiler ash). TRL - Cleaning drag chain conveyor with linear axis: suitable for recovering dust beneath main conveyors such as pan or belt conveyors. TRLC - Cleaning drag chain conveyor with curved axis: suitable for recovering dust beneath main conveyors and recycling them on the latter.

EVD-Bucket Elevator with Chains and Shackles

EVD-DIN type High Speed Bucket Elevator Bucket elevator with chains strands and shackles, manufactured according to the main indications of the DIN 15251 Table. The latter refers to a double chain elevator with the following features: - a series of standard bucket dimensions (width) ranging from 160 mm to 800 mm, increased up to 1600 mm for larger elevators - buckets manufactured according to DIN 15234 specifications and including holes for connection to the shackles - drive wheels with hub and smooth rings for driving the chains through friction - return wheels of the same type as the drive wheels - chain strands manufactured according to DIN 764 specifications (or, alternatively, DIN 766 type strands with shorter links) - DIN 745 type shackles for connecting the buckets to the chains (Gambarotta Gschwendt uses reinforced DIN 5699 schackles that are interchangeable with DIN 745 shackles) - tangential feed inlet on idle station - tangential discharge outlet on drive station - standard counterweight tensioning system with load equivalent to roughly 80% of the weight of the material contained in the up run Type of discharge: tangential-centrifugal

EVR - Bucket Elevator with Continuous Round Steel Chains

EVR - High speed Bucket Elevator with round link chains. Elevator with two continuous drive chains and toothed wheels, with body similar to standard DIN 15251. The main features of the bucket elevator include the following: - standard dimensions (i.e. bucket width) complying with DIN specifications, or increased width for larger elevators - buckets with either standard capacityh according to DIN 15234 specifications or increased capacity, equipped with suitable attachments (A and B) for connection to the chains - drive wheels with replaceable teeth for driving the chains - return wheels with hub and smooth rings - high-grade alloy steel continuous chains with long strands - flat and round driving pins for connecting the buckets to the chains - tangential feed inlet on idle station - tangential discharge outlet on drive station - standard tensioning system with contrast springs, pair of threaded bars and adjustement nuts Type of discharge: tangential - centrifugal

BULK MATERIAL LOADING SYSTEMS

Bulk material loaders load powdered or granular material onto both open and closed trucks and dumpers without causing pollution to the environment. The material flows through an internal element of the bellows and is loaded directly onto the vehicle. Dust is contained by means of vacuum filter. The bulk material loaders are provided with a level sensor which cuts off the flow of material once the maximum level of material has been reached. We produce two types of bulm material loaders: CS: Bulk material loaders for powdered matgerials such as cement, gypsum, ash, etc, or for low abrasive granular materials such as fertilizers, cereal, feed, sawdust or similar CSM: Bulk material loaders for granular materials suck as clinker, lime, coal, lime oxide in lump form or particular abrasive materials The bulk material loaders can be attached directly under the silo from which the material flows by means of appropriate valves (rotary, drum, helmet, butterfly valves) or at the extreme end of a conveyor (screw conveyor, air slide, belt conveyor or other)

SIZER - CRUSHER

Purpose of the machine: the sorter is designed to homogenise the maximum size contained in the flow of the inlet process material. The machine brings to the desired size that remaining fraction of larger-sized particles, maximum 5-10% of the total, contained in the flow of the material, in order to avoid clogging the dosing devices of the downstream process system. Sorter Description: the sorter essentially consists of: - two counter-rotating rotors, each individually controlled by its own drive train consisting of electri motor, gearbox and hydraulic coupling - two grids (crushing plates), one for each rotor, manually adjustable to limit the maximum through size The rotors are composed of: - a series of cutting segments, made of steel with high resistance to wear and stresses, which can be replaced without having to remove the transmission shafts - a contaiment and support structure for the mechanical elements, equipped, in the areas affected by the flow and contact of the material, with anti-wear steel guards - two transmission shafts, one for each rotor, equipped with supports and bearings at each end - automatic overload protection systems - a carrier wheel system for fast transfer from the working position to the maintenance position - gearbox oil cooling control unit Field of use: For materials with a grinding index according to Bond up to about Wi=7 or up to a compressive strenght of material of about 300 MPa Advantages of the App Size Sorter: - crushing rotor shafts supported independently from gearboxes - crushing segments that can be replaced without having to remove the relative shafts - supports with metal and grease seals - low speed crushing so in without vibrations, noise and dust emissions - insensitive due to the fouling of wet material because self-cleaning - possible operation even of a single rotor to ensure system operation

APRON FEEDERS

Material Load: - impact rails: absorb the force of material loading and protect the roller bearings - the plates flex under the loading shock, discharging the force on the frame through the impact rails, thus protecting the roller bearing - once the material is loaded, the plates are stiff enough to flex back and proceed supported by the rollers without contact with the impact rails Plates: - thick steel sections forces the material to follow the plates even during the hardest extractions under a full hopper - the anti-spillage lip is in special armoured steel and ensures continuous contact between two adjacent plates, minimisibg material spillage Wheels and chains: - drive wheels are made in high alloy steels with replaceable toothed segments - the parts in contact with the chain are induction-hardened to extend their operating file - the chains with pins and fixed bushes are in high alloy steel, induction-hardened on the wear surfaces Pins and bushes are tempered to ensure a very long wear life A complete range of strong apron feeders is available for the heavy duty extraction of material from hoppers under waggon tipper or truck unloader. The Apron Feeders are designed for robustness and effectiveness of processes: they can reach over 3600 millimeters ub width; the pans ae built in tick steel profiles, reinforced with beams, with a shock absorbing systems that protects the bearing of the rollers from the impact shocks They can extract hoghly abrasive materials with grain size up to 1500 millimeters. They can be fully dismountable to be retrofitted into your existing bunkers

EV-C Metallic Continuos Bucket Elevators

The EV-C is a continuous bucket elevator, Z shape, with bucket running on rollers fitted in chains Advantages: - No sliding friction between chains/buckets and casing - Low power assumption due to run on rollers - High resistance to foreign matters in conveyed material - Buckets overlaps avoiding spillage - High temperature resistance - Buckets made on steel or stainless steel - Buckets replaceable for easy maintenance - Metallic sealing between the buckets - Multiple inlet feeds for customer flexibility - Full dust / air tight - Heavy duty chains for long-life durability and reliability - Full metallic construction Applications: clinker, fertilizer, carbon black, metal powders cereal, gypsum, cement, salt/spices, catalyst, coffee/tea, chemical confectionery, pasta, batteries, glass cullet

EV-METRO High capacity bucket elevator with continuous descending system

The EV Metro Bulk is a conveying system which allows fast evacuation of bulk material from the escavating area without providing a truck rump At same time the system can be easily adjusted in the lenght/depth following the descending level of excavation The system can be lowered and lifted in/out of digging area for maintenance purpose or in order to dig the area under the metro bulk system as well Data: - capacity up to 800 m3/h - maximum size of material: 150 mm (standard version) - installed power (300 ton/h - 30 mt depth: about 100 kW) - descending level: up to -40 mt (level -40 mt) Advantages of the system: - no truck rump necessary for access for exacavation basement - fast bulk material evacuation due to the high capacity of the system - standard trucks can be used for bulk material transport - no trucks present in the excavating area - all excavating area available for digging operations - dust free loading on trucks - easy maintenance of system, possible outside the digging area at level 0,00 - fast adjusting of system due to the day by day descending digging level

EP-DOS 1000X450 APRON WEIGHING FEEDER

Heavy duty, high temperature, high accuracy Main features: - constant loading and variable chain speed through frequency inverter - 4 load cells installed on an indipendent frame - heavy duty pans (8 mm thick) for truck and hopper loading and feeding - heel plate on loading chute for lumpy materials Weighing system: - automatic calibration program - preset default values for quick and easy commissioning - wall mount housing for installation at site - remote control - 4 load cells with output balancing - frequency inverter Main advantages: - heavy duty version for hot materials - compact, only 5 m long - high accuracy thanks to software load cell output balancing - combined feeding and weighing functions in a single unit - mechanical weight adjustement - electrical weight adjustement - low vibrations system Scope of supply: - apron weighing feeder complete with weighing system, frequency inverter, electric board - commissioning and calibration of the weighing system

ESPC - Bucket Elevator with central chain

ESPC - High-speed bucket elevator with single central chain. Bucket elevator with a single chain driven by a toothed wheel. The main features of the bucket elevator include the following: - standard dimensions in conformity to DIN specifications starting from 200 mm, with increased width for larger elevators - buckets od suitable capacity and shape, with four holes on rear end for connection to the chain - toohed return wheel - link chain with side plates, pins and fixed bushings. Certain plates fature drilled angular attachments for connection to the buckets - tangential feed inlet on idle station - tangential discharge outlet on drive station - standard tensioning system with contrast springs, pair of threaded bars and adjustement nuts. Alternatively, a hidraulic tensioning system can be used Type of discharge: tangential - centrifugal

ESP - Bucket Elevator with double back chains

ESP - Medium-speed continuous bucket elevator, with double chains connecting the rear of buckets. The mild centrifugal force due to low speed causes part of material to flow off the back of the preceding bucket. Bucket elevator with chains driven by toothed wheels. The main features of the elevator include the following: - standard dimensions in conformity to DIN specifications starting from 315 mm, with increased width for larger elevators - high-capacity buckets with extended sides in the upper section (buckets in the discharge phase) so as to contain the material arriving from the bucket behind The back of the buckets features holes for connection to the chains - Drive wheels with interchangeable toothed segments for driving the chains - Toothed return wheels - Link chains with side plates, pins and fixed bushings. Certain plates feature drilled angular attachments for connection to the buckets - Tangential feed inlet on idle station - Tangential discharge outlet on drive station - Standard tensioning system featuring parallel tensioning by counterweight Alternatively , a hydraulic tensioning system can be used Type of discharge : tangential, partly centrifugal and partly gravity discharge

SILO PLOW FEEDER EF-S

WHEELED CUTTER EF-C

SPARE PARTS

The use of original spare parts increases the life of plants and decreases maintenance intervals. Our Technical Service helps customers to select the right spare part for each machine Our Technical Service can retrieve all kinds of original documents to help program effective maintenance services, supply spare parts and study how to improve service conditions Our know-how can also be used to boost the performance of equipment of other makes by retrofitting or revamping existing plants. A scheduled maintenance, for istance, can be a great opportunity to improve productivity by installing a drive group equipped with an electronic frequency converter that optimizes material flow. Gambarotta Gschwendt is a manufacturer, not just a reseller: our warehouse is always well equipped with components and half-processed parts and our production department can manufacture any kind of spare part in short time During a maintenance programming phase, our After Sales Service can help evaluate the need for intervention and suggest solutions to improve the profitability of a process We also provide assistance for installing spare parts or restarting the plant WHAT WE DO - Measure and make 3D drawings of existing civil works such as steel structure, existing conveyors and bucket elevator casings - Design conveyors, bucket elevators and feeders to be installed in the existing spaces - "D" series - Hinged supports - "F" series - Flanged supports - Sliding supports - Intermediate supports - Lubrification-free supports - Motors and gearboxes - Cell feeders - Simple and double flap valves - Gate and Rod valves - Diverters and Rotary valves - Shafts and wheels - Chains and scrapers - Chains and rollers One year warranty from the date of delivery In case of need for spare parts pls send an email request to spareparts@gambarotta.it

PAN CONVEYOR CAPACITY BOOSTER

A TP booster is a system for detecting overcapacity that temporarily increases speed and capacity to avoid overflow. The system automatically reduces the speed as soon as overcapacity is no longer required It is made of: - load cells under the inlet - frequency inverter at drive + dedicated control card - control board - sized electric motor Functionning: the load cells under the inlet chute detect the incoming high amount of matertial. The output from the load cells, conveniently controlled from the control board, take to an increase of the speed at the frequency inverter The frequency inverter is controlled by a special function which increases the speed based on the actual measured torque necessary for conveying the higher amount of material. As soon as the incoming material capacity goes back to normal, the frequency inverter automatically decreases the speed

ELM-Bucket Elevator with link chains with pins and bushes

ELM- Low Speed Bucket Elevator with toothed drive wheels and double chains connected to the bucket sides. Similar to ELR elevators but mounting roller chains with pins and bushings fixed to the bucket sides, to ensure central discharge aligned with the elevator. The main features of the elevator include the following: - standard dimensions of the same series as for high-speed elevators, starting from 315 mm - sturdy buckets, suitable for dredging on the reinforced outer side and discharging on the opposite internal side. Four holes are drilled into the sides for connection to the chains - toothed return wheels - link chains with side plates, pins and fixed bushings. Certain plates have drilled shaped attachments for connection to the buckets - tangential feed inlet on idle station - central discharge outlet under drive station - standard tensioning system featuring parallel tensioning by counterweight Alternatively, a hydraulic tensioning system can be used Type of discharge: central gravity

EM- ARMORED CHAIN CONVEYOR

Function: -armored chain conveyors for hopper discharge of crushed limestone, stickly materials as chalk, gypsum, clay or coal - armored chain conveyors are 2-8 strand chain conveyors designed to convey material on the upper side, lined with wear resistant base plates - high capacity of bulky and sticky materials, continuously discahrged and metered from bunker Applications: - railroad car discharge - coal silo feeding - quarry feeding and discharge operations - crusher feeding - materials conveyed: coal, clay, limestone, clinker, gypsum, potash, petroleum coke, cement, lime gypsum Main Features: - wear resistant version - round link chains with cleaning scrapers - compact design with reduced height - variable chains speed and capacity - impact resistant design

NEW BUCKET ATTACHMENT "GQS"

- no breaking shackles - fast assembly - continuous chains - replaceable to DIN shackles - endless chain strands can be used - bucket attachments runs over plain wheels - suitable for replacing all the DIN bucket attachments in round steel link chain bucket elevators except side-wall attachments - less wear and tear on chain - no overdimensional components - higher component reliability

ROLLER SCREEN AND CRUSHER

The Roller Screen Crusher has been developed to crush and screen matariel. It also removes foreign materials, such as stone, wood or plastic, that have passed through the crushing stage without being crushed. Oversized material is conveyed by the rollers to the crusher where the crushable material is reduced to the size required and after that it passes onto a second roller screen. Object harder than the normal feed make the crusher setting increase, and the materials pass through the crusher onto the second roller screen, where the oversized material is rejected as waste. Advantages: - small crushing building - low feeding height - compact equipment construction - light equipment - low electric power - smaller electric switchgear and cables - the heaviest part, the crusher roller, is also relatively light. For the maintenance and repair crane, only a lift beam and a simple hoist are needed - can be easily encapsulated to minimize dust problems

ETR-Bucket Elevator with continuous round chains (for large grain size)

Non-dredging Low-Speed bucket elevator for lifting large-sized material. Elevator with two round link continuous chains and toothed wheels. The chains are anchored to the sides of the buckets to ensure central discharge aligned with the bucket elevator. The main features of the bucket elevator include the following: - standard dimensions (i.e. bucket width) of the same series as for high-speed elevators, starting from 315 mm - non-dredging continuous pocket buckets with overlapping edges, equipped with bushings for connection to the driving pin - drive wheels with exchangeable teeth for driving the chains - return wheels with hub and smooth rings - high-grade alloy steel continuous chains with long strands - couplings for connecting the chain strands - bucket driving pin, one end of which connects to the chains - central feed inlet on idle station - central discharge outlet under drive station - standard tensioning system with contrast springs, pair of threaded bars and adjustement nuts Type of feed system: central Type of discharge: central gravity Drive station These bucket elevators can lift large-sized lumps of material (even up to 400 mm), thanks to direct loading into special "pocket" buckets without any dredging The picture shows the drive station of an ETR bucket elevator during installation. Note how the "pocket" buckets are joined together and ensure gravity discharge in the central zone of the drive station Boot station Lower section of the bucket elevator comprising the central feed inlet. The special feed system configured at the centre of the boot station, allows for directly feeding the buckets without dredging thanks to a suitable hopper that protects the return shaft. In this way, even exceptionally large sized lumps of material can be lifted

ELD - Bucket Elevator with chains and shackles

ELD - Din-Type Low-speed Bucket Elevator Bucket elevator with chain strands and shackles The chains are placed on the sides of the buckets to ensure central discharge aligned with the elevator. The main features of the elevator include the following: - standard dimensions (i.e. bucket width) of the same series as for high-speed elevators, starting from 315 mm - sturdy buckets, suitable for dredging on the reinforced outer side and discharging on the opposite internal side. The sides are fitted with two perforated brackets for connection to the shackles. - drive wheels with hub and smooth rings for driving the chains through friction - return wheels of the same type as the drive wheels - chain strands manufactured according to DIN 764 specifications (or, alternatively, DIN 766 type strands with shorter links) - DIN 745 type shackles for connecting the buckets to the chains - tangential feed inlet on idle station - central discharge outlet under drive station - standard counterweight tensioning system with load equivalent to roughly 80% of the weight of the material contained in the up run Drive Station The top section of a bucket elevator that drives it through the drive assembly and discharges raised material through gravity from a central outlet. It consists of a sturdy structure with brackets for shaft supports, an upper cover comprising two parts that can be removed for inspection and maintenance, a drive shaft with two smooth ring wheels supports with bearings and dust-proof seals for the drive shaft Inspection and adjustement doors; de-dusting flange Central Discharge Outlet On low-speed bucket elevators, material is discharged through gravity in the central zone of the head section, which includes an appropriate hopper located under the drive shaft. A suitable element protects the hopper against wear caused by the material being discharged Find out more at www.gambarotta.it

TC Box Conveyor

An alternative to transport clinker at inclines over 45° are TC box conveyors. Similar in composition and specification to TP conveyors, TC box conveyors include a metal belt that conveys the material and which is made up of a series of boxes placed at a distance corresponding with twice that of the chains that connect them underneath. The front wall of one box mounts onto the rear wall of the neighbouring box to avoid any loss when the material is loaded. The chains connect the boxes to each other and also provide the required articulation. The chains have an "anti-rotation" feature, allowing the belt to be supported in an almost planar position even though the supports are placed four times further apart than the pins of the chains. One box in every two is equipped with a pair of rollers with bearings that guide and support the belt and rest on the tracks Material is conveyed on the upper branch only, where several loading points are allowed. Specification of TC Box Conveyor - possible inclination is up to 60' - no powder leakage throughout the life of the conveyor - minimum curve radii of 10m are permitted

TTP Deep Bucket Conveyor

The favourable position of the chains allows the conveyor to be used to transport incandescent material The chains are positioned laterally and in the highest part of the buckets - the area least affected by the hot material. This position reduces the vertical footprint of the equipment compared to TP and TC conveyors. TTP deep bucket conveyors convey material on the upper branch only but hold material well within the confines of the conveyor. Throughout the conveyor's life, no flow-through of material is observed. Moreover, this type allows for the occasional transport of incandescent material (900-1000 °C), which is particularly useful in istances or kiln malfunction

TRP Drag Paddles Conveyor

The drag paddles conveyor TRP allows the transport of bulk material having very low pile angle, on sloped tracks

SLIDE GATES

Gate valves for interrupting material flow, to be installed on the loading / discharge outlets, with manual, pneumatic or electro-mechanical drive

FLAP VALVES

Single and double shaft-mounted flap valves for separating sections with different pressures, with electro-mechanical, pneumatic or hydraulic drive

ROTARY VALVES

Radial rotary valves for infeeed and outgfeed of materials, as well as for separating sections with different pressures, with electro-mechanical controls

EXPANSION JOINTS

Flexible joints for coupling flanged outlets to various elements Made of heat and wear resistant materials. Additional accessories like torque limiting devices, centralized lubrification systems, rotation control, devices and other instruments may be supplied upon request

ELR - Bucket Elevator with continuous round chains

Low-Speed Bucket Elevator with round link chains. Type of bucket elevator with two continuous drive chains and toothed wheels. The chains are anchored to the sides of the buckets to ensure central discharge aligned with the elevator. The main features of the elevator include the following: - standard dimensions (i.e. bucket width) of the same series as for high-speed elevators, starting from 315 mm - sturdy buckets, suitable for dredging on the reinforced outer side and discharging on the opposite internal side. The sides are fitted with suitable attachments for connection to the chains - drive wheels with replaceable teeth for driving the chains - return wheels with hub and smooth rings - high-grade alloy steel continuous chains with lond strands - couplings for connecting the chain strands - flat and round driving pins for connecting the buckets to the chains - tangential feed inlet on idle station - central discharge outlet under drive station - standard tensioning system with contrast springs, pair of threaded bars and adjustement nuts