Abstract:
The present invention belongs to the field of mechanics and refers to a device for selective processing of mixtures of green and ripe coffee cherries. Said device is a helical conic apron comprising vibro-elastic inserts which pliability allow them displace proportionally to the size and hardness of different coffee cherries. Additionally, the present invention refers to an integral machine comprising helical conic aprons with vibro-elastic inserts, which does not use water and is designed to receive mixtures of ripe and green coffee cherries, depulp ripe cherries, separate semi-pulped green cherries by a separating machine and remove the pulp from ripe cherries. Finally, the present invention refers to a method for the selective processing of mixtures of green and ripe coffee cherries by the use of the already mentioned integral machine.

Description:
This application is a National Stage Application of PCT/IB2009/055555, filed 7 Dec. 2009, which claims benefit of Serial No. PI-0806014-2, filed 22 Dec. 2008 in Brazil and which applications are incorporated herein by reference. To the extent appropriate, a claim of priority is made to each of the above disclosed applications. 
     TECHNICAL BACKGROUND 
     Quality of the coffee drink depends greatly on the type of cherry processed because while ripe coffee cherries allow obtaining high quality per cup, green coffee cherries produce astringent and unpleasant flavours deteriorating quality of the drink. Therefore, it is clear to be convenient to carry out processing of ripe coffee cherries and green coffee cherries separately. 
     Despite the above, use of machines during harvesting of coffee cherries, as well as non selective manual harvesting of the coffee crop has evidenced an increase in the percentage of green cherries mixed with harvested ripe cherries, which unfortunately implies the need of carrying out a separation process of green and ripe coffee cherries before the processing stage, which is not simple considering, for example, that all coffee cherries have the same density, and therefore, their separation can not be made by flotation. 
     Different mechanisms exist at present for separating green from ripe coffee cherries. For example, electronic machines are known selecting the cherry from its colour, technology based on the use of lens and sensors for detecting bean by bean differences in colour reflection. Despite said method does not require water and power consumption is low, its application is very limited due to the high cost of equipment and low processing capacity. 
     Other type of mechanisms for separating mixtures of green and ripe coffee cherries known at present are directly related to the depulping process. Thus, for example, green and ripe coffee cherry separating machines have been designed which functioning principle lies on the initial compression of the mixture on walls of a perforated metallic basket, so that exerted pressure allows only breaking of pulp of ripe cherries and their subsequent passing (pulp and coffee beans in separate) through perforations of the metallic basket. In other hand, green whole cherry does not pass through perforations of the basket because of its size and hardness, and then it leaves by a side thereof. 
     However, performance of said equipment represents certain type of problems, among which, there are: 1) use of lot of water is required to keep perforations of the basket clear and also to regulate power consumption; 2) subsequent stage is required to separate the pulp from the beans of the ripe cherry, which is made usually by methods such as flotation or by metallic screens, and therefore, they also require high water and power consumption; 3) water contacted with the pulp and coffee mucilage becomes contaminated and its recovery implies high treatment costs; and 4) non depulped ripe cherries are mixed with green cherries, and smaller green cherries pass through perforations of the metallic basket together with the pulp and depulped ripe beans, then, subsequent processes are necessary for their recovery. 
     In other hand, patent document U.S. Pat. No. 3,139,919 teaches a machine designed to depulp, wash and classify coffee, involving a disk depulping machine, a coffee friction washer machine and a screen classifying coffee bean by size. This document emphasizes that said machine allows selectively depulping ripe cherries as a result of the position of disks in the depulping machine and of differences in sizes existing between ripe and green coffee cherries. However, said performance principle does not consider the existence in the crop of small ripe and green cherries, as well as the existence of big ripe and green cherries, then said system is evidently not effective to carry out an efficient selective depulping process. Additionally, depulping machine described in document U.S. Pat. No. 3,139,919 requires lot of water for its performance, and this technology is currently obsolete for evident reasons. 
     On the other side, at present there are known vertical depulping machines using rigid aprons, as well as horizontal cylinder depulping machines using high hardness and low elasticity rubber bottomed aprons, working together with circular screens as mechanism for separating green and ripe coffee cherries. However, due to the need of avoiding depulping of green cherries, structure and position of aprons in said machines must be calculated so that depth of the channel is higher than the size of the green cherry, which evidently leads to a high process inefficiency because small ripe cherries are also able to pass whole together with green cherries, forcing an additional process for recovering said ripe cherries. 
     In turn, screens are machines in form of flat tray which bottom is a slotted sheet moving laterally by cycles by and eccentric action, which causes materials of smaller size than the slots are able to pass through them, whereas remaining material (that is, of higher size) to be finally removed in separate. Unfortunately, said machines are characterized by their low process capacity, their instability and by the excessive noise they generate. 
     On the other side, circular screens are rotating cylinders of great size attached to a rotating shaft by metallic arms, and which are partially covered by a slotted sheet or by bars spaced each other. Said arrangement allow rotating movement of the screen to induce passing of materials of smaller size through the slots or spaces, and confining inside greater material, thereby achieving separation of materials based on their size. However, said apparatuses are not suitable either to carry out separation processes due to their excessive size and high cost. 
     Finally, it is very important to emphasize that the process known currently for depulping ripe coffee cherries in horizontal, vertical or disk depulping machines, is composed by four (4) fundamental stages:
     1. Dosing the amount of coffee to be depulped by a rotating mechanical element;   2. Entering of cherries to the depulping zone which is formed by the dentate jacket or grate and the apron;   3. Squeezing coffee cherries between the rigid channel-shaped bottom of the apron and the dentate jacket or grate until pressure exerted surpasses breaking resistance of the pulp and make two coffee beans (formed by endosperm, tegument, endocarp and pectin layer) separate; and   4. Removing pulps from the depulping zone which are hooked in teeth of the dentate jacket or grate, and leaving of depulped beans by a different opening located at the end of the apron channel.   

     Form the above, it is clear that said depulping mechanism implies squeezing of coffee cherries between two rigid walls (bottom of the apron and dentate jacket or grate), then, pressure that green cherries thus processed are subjected to, is able not only to generate their depulping (favouring their mixture with ripe beans also depulped), but also to imply generation of mechanical damage in the bean. Thus, for example, it is known that depulping process made between rigid and abrasive surfaces produces a breaking of an amount equivalent to 5% and 15% parchment of green beans, and between 0.2% and 1% depulped ripe beans. 
     BASIC CHARACTERISTICS OF THE INVENTION 
     Well then, considering teachings of the previous state of the art, and based on the performance of the different types of depulping machines know so far, applicant of the present invention considered that an efficient way to carry out processing of mixtures of green and ripe coffee beans—independently from the percentage of green cherries in the mixture—, was by making fundamental changes in the structure of helical conic aprons making part of vertical coffee depulping machines, so it is possible to depulp ripe coffee beans regardless their size, separate pulp mechanically without the use of water and do not depulp green cherries, leaving them whole to facilitate their separation by size. 
     In this sense, and considering that compression resistance and breaking resistance of the pulp (mesocarp and pericarp) are higher for green coffee beans in relationship to ripe coffee cherries, inventor has incorporated to the body of the helical conic apron a series of elastic inserts which pliability allow them to have a displacement proportional to the size and hardness of the different types of coffee cherries, so that differential pressure exerted by said elastic inserts allow breaking the pulp of ripe cherries and just scratch the pulp of green cherries, and without causing breaking of the parchment of depulped ripe beans. 
     As a consequence of the above, that is, since the geometric design and location of elastic inserts in the body of the helical conic apron allow green cherries to pass along the metallic channel of the apron body without being completely depulped, subsequent separation by sizes of depulped ripe beans and of semidepulped green beans is achieved easily. 
     Additionally, temporary contact between each green coffee cherry fed to the depulping machine and elastic inserts located along the channel of the apron generates a brief displacement of said inserts perpendicularly to the channel trajectory, so that continuous passing of green cherries creates a repeated or vibrating movement of elastic inserts forcing all cherries,—regardless their size—, to contact the dentate jacket or grate of the depulping machine, favouring thus hooking of pulp of depulped ripe beans in teeth of the jacket, their subsequent removal from the vibro-elastic apron, and therefore, their separation from the coffee mass, being this last formed only by depulped ripe beans and semidepulped green cherries. 
     Well then, after said coffee mass leaves vibro-elastic aprons, it is carried to a green cherries separating machine wherein, by helixes of a rotary rotator, said mass is introduced to a semicircular basket containing suitably separated slots to allow passing of depulped ripe coffee beans, without allowing passing of semidepulped green cherries, of greater size, which are therefore separated from the final mass of the semicircular basket canasta. 
     Finally, coffee ripe beans passing by slots of the semicircular basket are carried by the hopper and by the protective guards of said semicircular basket to a double-threaded screw conveyor, which convey them out of the machine. In other hand, the pulp of the ripe cherry swept before by the dentate jacket or grate, is also conveyed to the screw conveyor, which carries it out of the machine through a different duct. 
     As seen, mentioned equipment, that is, helical conic aprons with vibro-elastic inserts, green cherries separating machine, and the integral machine comprising them, allow—without the use of water—receiving mixtures of ripe and green coffee cherries, depulping ripe cherries, separating semidepulped green cherries and separating pulp from ripe cherries, all above without damaging depulped coffee ripe beans and semidepulped green cherries. 
    
    
     
       DETAILED DESCRIPTION OF THE INVENTION 
       Besides what was stated before, subject matter of the present application and surprising technical advantages achieved by the inventor shall be appreciated in detail by the following description of the structure and performance of the vibro-elastic helical conic apron, of the green cherry separating machine, and of the integral machine including them, with reference to the accompanying drawings wherein: 
         FIG. 1   a  is a picture of a vibroelastic helical conic apron; 
         FIG. 1   b  is a picture of an individual elastic insert; 
         FIG. 1   c  is a picture of the apron body; 
         FIG. 1   d  is a picture of a insert-holder structure with elastic inserts; 
         FIG. 2  is a general and cross-sectional view of a vertical conic depulping machine with vibro-elastic helical conic aprons; 
         FIG. 3   a  is a schematic view of the green cherry separating machine; 
         FIG. 3   b  is a schematic view of the semicircular basket of the green cherry separating machine 
         FIG. 3   c  is a sectional schematic view of the green cherry separating machine; 
         FIG. 4  is a general view of the screw conveyor; 
         FIG. 5  shows the general assembly of an integral machine for the selective processing of mixtures of ripe and green coffee cherries; 
         FIG. 6  is a general view of the metallic structure on which the integral machine of  FIG. 5  rests; and, 
         FIG. 7  shows a schematic diagram of the integral machine of  FIG. 5 . 
     
    
    
     Well then, regarding  FIG. 1 , the vibro-elastic helical conic apron  40  is formed by a piece in form of channel or apron body  82 , elastic inserts  83  which base is snap fitted to an insert-holder structure  84 , and screws  85  allowing the attachment between the apron body  82  and the insert-holder structure  84 . 
     Said elastic inserts  83  are pieces from rubber or any other natural or synthetic flexible material, such as, for example, Teflon, nylon, urethanes, polyurethanes, polyamides and/or elastomer mixtures or any plastic material. 
     In other hand, both apron body  82  and insert-holder structure  84  are metallic elements or any other material which does not alter their correct performance. 
     Also, in other embodiment of the invention, said elastic inserts  83  may be fastened to the insert-holder structures  84  by glues, screws, vulcanization, or by any other material or process allowing to lockup their base and keep their end or tab free, so this last may displace and vibrate after contacting green and ripe coffee cherries being processed. 
     Additionally, in other embodiment of the invention, apron body  82  and the insert-holder structure  84  may be joined by rivets, glues, welding or by any other material or process allowing a stable fastening between these two components. 
     Finally, the present invention includes implementation of elastic inserts  83  inside a helical conic apron without limiting their number and size, and without being restricted to a specific arrangement or geometric shape. 
     Well then, regarding the physical arrangement of the integral machine for the processing of mixtures of green and ripe coffee cherries comprising vibro-elastic helical conic aprons, and with specific reference to  FIG. 5 , a metallic structure (A) withstands a vertical conic depulping machine (B), a green cherry separating machine (C), a pulp and depulped beans screw conveyor (D), a motor (E) and protective guards (F y G). 
     On the other side, regarding the functioning mechanism of the above mentioned integral machine and with reference to  FIGS. 2 to 4  of the present application, mixture of green and ripe coffee cherries enters to the vertical conic depulping machine including previously described vibro-elastic helical conic aprons  40 , and deposits in the hopper  1 . The blade of the hopper  2  and the rotating feeder  3 , form the cherry feeding regulation system to the depulping machine, so that already dosed coffee (green and ripe) passes to a second chamber formed by the framework  10  and bottom of framework  11 , wherein the stirrer  8  is located, rotating at the same speed than the rotating feeder  3 , and which function is distributing and press squeezing coffee cherries inside the vibro-elastic helical conic aprons  40 . In said vibro-elastic aprons  40  only ripe cherries are depulped, which already separated pulp is then hooked by the dentate jacket or grate  16  mounted on the depulping cone  14 , so that they both rotate jointly at the speed of a vertical shaft  34 , acting as support of the depulping cone  14 . Subsequently, ripe coffee beans and semi-depulped green cherries continue through the vibro-elastic apron  40 , pass the star  38  and fall to the framework tube  61  of the green cherry separating machine. Once inside, rotor helixes  59  convey the coffee mass and introduce it in the semicircular basket  58 , wherein a stirring process of said coffee mass is generated by blades, so that, by the movement and centrifuge force originated by the rotor  59 , depulped ripe coffee beans pass through the slots of the semicircular basket  58 , whereas semidepulped green cherries—because of their greater size—are kept inside the semicircular basket  58  until they are finally removed through a duct specially designed for this purpose. 
     Finally, ripe coffee beans passing through slots of the semicircular basket  58  are carried by the hopper  69  and by the protective guards of the semicircular basket  58  to a double-threaded screw conveyor  77  (left in an end and right in the other), which convey them out of the machine. On the other side, pulps of ripe cherry previously hooked by the dentate jacket or grate  16 , are also conveyed to the screw conveyor  77 , which take them out of the machine through a different duct. Rotation of said screw conveyor  77  is actuated by the chain pinion  74 , whereas rotation of the vertical conic depulping machine is actuated by the chain pinion  17 . However, both chain pinions  74  and  17  are actuated by the channels of the double pinion  64 . 
     Said semicircular basket  58  may be manufactured with perforated metallic or plastic sheet or by round or square metallic rods. 
     This integral machine may be constructed in different sizes and capacities, and may be actuated by any type of motor, either electric or internal combustion motor. 
     On the other side, it is very important to emphasize that during currently known processing of coffee, green cherries are dried whole, and this fact represents high energy requirements (drying machines of higher capacity are required) and therefore, of money. However, authors of the present invention have been able to establish that physical contact during a time superior to four (4) hours between semi-depulped green cherries (that is, such as they leave the previously describe integral machine) and mucilage of depulped ripe beans allows achieving a forced ripening of said green cherries, thereby facilitating their depulping process by the integral machine of the present application, without causing physical damages in coffee beans. In this sense, removal pulp of said green cherries drastically decreases drying times and therefore, processing costs. 
     As a result of the above, the present application comprises a method for the selective processing of mixtures of green and ripe coffee cherries, comprising the following stages:
         a. Feeding a vertical conic depulping machine comprising vibro-elastic helical conic aprons, with green and ripe coffee cherries;   b. Depulping ripe cherries and semi-depulping green cherries by passing the mixture through vibro-elastic helical conic aprons and without adding water;   c. Separating by size depulped ripe cherries from semidepulped green cherries by a separating screen with improved rotor;   d. Collecting pulps of depulped ripe cherries hooked by the dentate jacket or grate of the vertical conic depulping machine;   e. Allowing contact of semidepulped green cherries with mucilage of depulped ripe cherries; and,   f. Feeding a vertical conic depulping machine comprising vibro-elastic helical conic aprons, with semidepulped green cherries which were contacted with mucilage of depulped ripe cherries.       

     Finally, the present invention includes the use of vibro-elastic helical conic aprons, of green cherries separating machine and the use of the previously described integral machine, for the selective processing of mixtures of green and ripe coffee cherries. 
     Comparative Examples 
     In order to evaluate performance of vibro-elastic helical conic aprons of the present invention, testing was made on processing of mixtures of green and ripe Arabic coffee cherries (30% green cherries and 70% ripe cherries) by using a conventional green separating machine (pressure performance), and depulping machines with:
         1) Helical conic aprons with metallic bottoms with different channel depths (6 mm, 7 mm y 10 mm); and,   2) Vibro-elastic helical conic aprons.       

     During said performance tests, following variables were evaluated:
         Depulping deficiency in ripe cherry, equivalent to percent by weight in sample of non depulped ripe coffee (optimal percentage: 0%);   Efficiency of selectivity in green cherry, equivalent to percent by weight in sample of non depulped green coffee (optimal percentage: 30%);   Mechanical damage to ripe bean, equivalent to percent by weight of ripe coffee bean mass having partial loss of parchment or kernel (optimal percentage: 0%, despite Icontec Standard 2090 accepts up to 1%);   Mechanical damage to green bean, equivalent to percent by weight of green bean mass having partial loss of parchment or kernel (optimal percentage: 0%); and,   Power required during the process.       

     Results obtained are summarized in Table 1: 
     
       
         
               
             
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 Results obtained Turing selective processing of mixtures of  
               
               
                 green and ripe Arabic coffee cherries (30% green cherries and  
               
               
                 70% ripe cherries) using different machines and processes. 
               
             
          
           
               
                   
                 Conven- 
                 Metallic 
                 Metallic 
                 Metallic 
                   
               
               
                   
                 tional 
                 helical 
                 helical 
                 helical 
                   
               
               
                   
                 green cherry 
                 conic 
                 conic 
                 conic 
                 Vibro- 
               
               
                   
                 separating 
                 apron 
                 apron 
                 apron 
                 elastic 
               
               
                   
                 machine 
                 (channel 
                 (channel 
                 (channel 
                 helical 
               
               
                   
                 (pressing 
                 depth:  
                 depth:  
                 depth:  
                 conic 
               
               
                   
                 method) 
                 6 mm) 
                 7 mm) 
                 10 mm) 
                 apron 
               
               
                   
               
               
                 Depulping 
                  5% 
                  2% 
                   5% 
                  20% 
                  1% 
               
               
                 deficiency in 
                   
                   
                   
                   
                   
               
               
                 ripe cherry 
                   
                   
                   
                   
                   
               
               
                 Efficiency of 
                 25% 
                  3% 
                  10% 
                  20% 
                 27% 
               
               
                 selectivity in 
                   
                   
                   
                   
                   
               
               
                 green cherry 
                   
                   
                   
                   
                   
               
               
                 Mechanical 
                  0% 
                  1% 
                 0.5% 
                 0.2% 
                  0% 
               
               
                 damage to 
                   
                   
                   
                   
                   
               
               
                 ripe bean 
                   
                   
                   
                   
                   
               
               
                 Mehcanical 
                  1% 
                 15% 
                  10% 
                   5% 
                  1% 
               
               
                 damage to 
                   
                   
                   
                   
                   
               
               
                 green bean 
                   
                   
                   
                   
                   
               
               
                 Use of water 
                 SI 
                 NO 
                 NO 
                 NO 
                 NO 
               
               
                 Power 
                 0.75 
                 0.6 
                 0.6 
                 0.6 
                 0.5 
               
               
                 Kw/ton 
                   
                   
                   
                   
                   
               
               
                 cherry 
               
               
                   
               
             
          
         
       
     
     Above results show clearly that use of vibro-elastic helical conic aprons during processing of mixtures of green and ripe coffee cherries allows not only achieving an excellent selectivity during depulping process, but also radically decrease mechanical damage caused in depulped coffee beans. 
     Also, it is very important to emphasize that performance of the integral machine for processing mixtures of green and ripe coffee cherries according to the present invention does not requires water and power demand is low, these characteristics evidence other type of advantages achieved with respect to the performance of the conventional green cherry separating machine. 
     Description of Parts of the Vertical Conic Depulping Machine with Vibro-Elastic Aprons 
     
         
         1. Hopper: it stores cherry coffee to be depulped 
         2. Hopper blade: leads coffee cherry to the feeder 
         3. Feeder: together with adjusting fins and mooring screws form the feeding regulating system of the machine. 
         4. Adjusting fins 
         5. Mooring screws—adjusting fins with washer and nut. 
         6. Adjustment nut of stirrer with vertical shaft 
         7. adjustment washer of stirrer and vertical shaft 
         8. Stirrer: it is mounted on the vertical shaft on the depulping cone and distributes and press-fills coffee cherries to all helical conic aprons. 
         9. Dragging wedge of stirrer. 
         10. Framework: structure the upper part of the machine, it is mounted on helical conic aprons, it withstands the hopper and stores coffee cherries to be depulped. 
         11. Frameworkk bottom: steel sheet complementing the space existent between aprons and the depulping cone avoids coffee cherries to fall with pulp without being depulped. 
         12. Right lateral guard: together with other guards lead the pulp to the pulp screw conveyor. 
         13. Screws with washer and nut mooring guards of the framework. 
         14. Depulping cone. Cone trunk on which jacket or grate is mounted and together with helical conic aprons execute the depulping process of coffee cherries and is coupled to the vertical shaft 
         15. Dragging bolt of depulping cone, it ties up depulping cone with stirrer. 
         16. Dentate jacket or grate: steel sheet half burble-shaped teeth, due to its shape, it injures the pulp of the coffee cherry and forces it to detach from the bean to withdraw it out of helical conic aprons. 
         17. Chain pinion: it receives the control of the rotor of green cherry separator and transmits it to the whole machine. 
         18. Dragging wedge of the chain pinion 
         19. Prison screw of the chain pinion 
         20. Horizontal shaft: it is mounted on bearings in the support arm and supports the chain pinion and the conic pinion. It transmits power from the chain pinion to the conic pinion. 
         21. Horizontal shaft bearing cap: it contains the retainer, it retains the bearing and avoids axial displacement of the horizontal shaft. 
         22. Retainer: sealing avoiding oil leakages by the horizontal shaft 
         23. Mooring screws of the bearing cap of horizontal shaft. 
         24. Bearing of horizontal shaft: bearing on which horizontal shaft is mounted 
         25. Supporting arm of horizontal shaft: it is supported on the elbow of the drive and withstands bearing of the horizontal shaft and bearing cap. 
         26. Conic pinion of horizontal shaft: it transmits control and allows change in rotation sense from the horizontal shaft to the vertical shaft. 
         27. Dragging wedge of conic pinion of horizontal shaft 
         28. Mooring safety nut and washer of conic pinion to the horizontal shaft 
         29. Drive elbow: it withstands the supporting arm of horizontal shaft. It is supported on the star of the base and is oil reservoir to lubricate the whole drive. 
         30. Base: It supports the machine and rests on the Framework tube of the green cherry separating machine, it leads depulped coffee to the framework tube 
         31. Mooring safety nut and washer of conic pinion of vertical shaft. 
         32. Dragging wedge of vertical conic pinion to the vertical shaft 
         33. Conic pinion of vertical shaft: it receives control from the conic pinion of horizontal shaft and transmits it to the vertical shaft 
         34. Vertical shaft: it is mounted on bearings in the star of the base and supports the depulping cone and the conic pinion. It transmits control to the stirrer and feeder. 
         35. Bearings of vertical shaft: bearings on which vertical shaft is mounted. 
         36. Mooring studs of the star and the base 
         37. Studs joining the star of the base and the drive elbow. 
         38. Star of the base: it is supported on the base and supports transmission, depulping cone and aprons. 
         39. Mooring bolts of aprons to the star of the base. 
         40. Vibro-elastic aprons: channel-shaped metallic pieces with elastic inserts covering the area of the jacket or grate without contacting it, keeping a distance allowing the pulp to exit. 
         41. Hex nut screws and flat washer for mooring apron framework 
         42. Left lateral guard 
         43. Rear and front guards. 
         44. bearing cap of vertical shaft: it contains the retainer, it retains the bearing and avoids axial displacement of vertical shaft. 
         45. Retainer: sealing avoiding oil leakages by the vertical shaft. 
         46. Mooring screws of the bearing cap to the star. 
         47. Separating bushing: it is between the adjustment washer of the cone and the internal lane of superior bearing of vertical shaft. 
         48. O&#39;ring: round rubber packing complementing the function of the separating bushing avoiding oil leakage through the vertical shaft. 
         49. Adjustment washer of depulping cone: this washer compensates tolerances in mechanisms and avoids depulping cone to chafe the star of the base.
 
Description of Parts of the Green Cherries Separating Machine
 
         50. Balance: it receives control of the motor pulley and transmits it to the whole machine by bands. 
         51. Prison screw adjusting the wedge to the rotor shaft. 
         52. Dragging wedge of the balance 
         53. Pillow block with bearings on which rotor is mounted. 
         54. Screws mooring pillow blocks with the left support flange. 
         55. Left support flange: it withstands left pillow blocks and the semicircular basket on the structure. 
         56. Screws mooring flange to the structure. 
         57. Screws mooring semicircular basket to flange. 
         58. Semicircular basket: constructed with square, round rods, or perforated sheet and sheet triangular roof. 
         59. Rotor: tube with welded helix stages forming a screw and stage blades to form a stirrer. It has two welded shaft ends and is mounted in bearings of the pillow block. 
         60. Mooring screws of the semicircular basket to the framework tube. 
         61. Framework tube: it withstands the semicircular basket, the reel and the base of the vertical conic depulping machine and receives depulped coffee. 
         62. Reel: it joins the framework tube and the right support flange. 
         63. Right support flange: it withstands the reel and the right pillow block on the structure. 
         64. Double pinion: it is mounted on the end of the shaft, transmits control to the vertical conic depulping machine and to the depulped coffee and pulp screw conveyor through belts. 
         65. Dragging wedge of double pinion. 
         66. Prison screw adjusting the wedge to the rotor shaft. 
         67. Screws tying up vertical conic depulping machine and the green cherries separating machine.
 
Description of the Parts of Screw Conveyor
 
         68. Protective guards of the semicircular basket 
         69. Depulped coffee Hopper carrying depulped coffee leaving the screen to the screw conveyor 
         70. Hopper carrying the pulp to the screw conveyor 
         71. Screws fastening hoppers to the structure 
         72. Screws fastening pillow blocks to the channel of the screw conveyor 
         73. Pillow block with bearing on which screw conveyor is mounted 
         74. Chain pinion living control to the screw conveyor 
         75. Prison screw fastening the dragging wedge of the chain pinion 
         76. Dragging wedge of the chain pinion 
         77. Double-threaded screw conveyor, one to the Leith, one to the right, carrying pulp by one side and depulped coffee by the other side 
         78. Channel of screw conveyor with two mouths, one in each end. 
         79. Bushing withstanding the end of the screw conveyor 
         80. Bushing support 
         81. Mooring screw of the channel support. 
         82. Apron body: channel-shaped metallic piece 
         83. Elastic insert: piece from rubber of synthetic material 
         84. Insert-holder structure: element fising elastic inserts 
         85. Screws fixing the cap to the apron
 
Description of the General Assembly of the Machine of  FIG. 5 
 
         Item A: Metallic structure wherein all elements are supported 
         Item B. Vertical conic depulping machine with vibro-elastic aprons 
         Item C: Green cherries separating machine 
         Item D: Pulp and depulped beans screw conveyor. 
         Item E: Motor 
         Item F: Motor guard 
         Item G: Depulping machine guard