GB2190582A

GB2190582A - Peeling vegetables

Info

Publication number: GB2190582A
Application number: GB08704022A
Authority: GB
Inventors: Bo Jonsson
Original assignee: Limas AB
Current assignee: Limas AB
Priority date: 1986-04-14
Filing date: 1987-02-20
Publication date: 1987-11-25
Anticipated expiration: 2007-02-20
Also published as: GB8704022D0; SE448668B; GB2190582B; SE8601670D0; DE3711847A1; DE3711847C2

Description

GB 2 190 582 A 1

SPECIFICATION the terminal stage of the peeling operation.

A Peeling Machine for Vegetable Products, in a suitable embodiment of the peeling machine Especially Potatoes according to the invention the reduction of the size of the peeling space from the charging end to the This invention relates to a peeling machine for 70 discharging end is ensured by the fact that the pitch vegetable products, especially potatoes. of the thread of the conveying screw decreases from A previously known peeling machine for potatoes the charging end to the discharging end.

is of the roller peeling type in which the potatoes are An embodiment of the invention is hereinafter fed by means of a screw conveyor through a described by reference to the accompanying chamber defined by a rotatable drum, the potatoes 75 drawings, in which:

being peeled while being fed through the chamber Fig. 1 is an axial section of a peeling machine by rotating rollers which define the peripheral according to the invention.

surface of the chamber and have a grinding or Fig. 2 is a cross sectional view of a peeling drum cutting coating consisting for example of of the peeling machine shown in Fig. 1.

carborundum grits. 80 The peeling machine shown in the drawings is The object of the invention is to provide an principally intended for the peeling of potatoes. The improved peeling machine of the above kind in peeling machine comprises a support consisting of which the peeling of the products is more uniform legs 2 and longitudinal beams 4. A drum 6 of and in which larger volumes of the products can be basically cylindrical shape is rotatably journalled in peeled per unit of time than in previously known 85 the support. The peripheral surface of the drum 6 is peeling machines of the type described. constituted by a number, for example twenty, rollers In orderto comply with this object the peeling 8 parallel with the axis of the drum. At one end, machine according to the invention comprises a which constitutes the charging end, the drum 6 has chamber having a charging end and a discharging a cylindrical charging portion 10 adapted to be end, a screw conveyor comprising a conveying 90 supplied with potatoes through a charging bowl 12 screw rotatably journalled in the chamber for connected with the charging portion 10. At its continuously feeding the products through the opposite end which constitutes the discharging end chamber from the charging end to the discharging the drum 6 has a cylindrical discharging portion 14.

end thereof and means for peeling the products The charging portion 10 and the discharging portion while the products are fed through the chamber, in 95 14 have fixedly connected, annular elements 16 and which the thread of the conveying screw and a 18, respectively, at their peripheral surfaces. The peripheral surface of the chamber enclosing the rollers 8 are rotatably journalled in these annular conveying screw define a peeling space extending elements 16 and 18 by means of shaft studs 20 and helically through the chamber from the charging 22, respectively.

end to the discharging end thereof this peeling 100 The drum 6 including the rollers 8 supported by space being of decreasing size in the direction from the charging portion 10 and the discharging portion the charging end towards the discharging end of the 14 of the drum is rotatably journalled on a shaft 24 chamber. rotatabiy connected with the support of the peeling The fact that the size of the peeling space machine. To the end portions of the shaft 24 there available to the products decreases from the 105 are connected pulleys 26 and 28, respectively, the charging end to the discharging end of the peeling drum 6 being supported by means of driving belts device according to the invention permits 30 and 32, respectively, extending around the considerable mobility of the products in the initial pulleys 26 and 28, respectively, as well as around stage of the peeling, which results in a substantial pulleys 34 and 36, respectively, enclosing the improvement in the uniformity of the peeling. The 110 charging portion 10 and the discharging portion 14, reduction of the size of the peeling space also respectively, of the drum 6. The end of the shaft 24 ensures that the pressure of the products against supporting the pulley 28 is coupled with a driving the peeling means which is necessary for motor 40 through a gear box 38. Thus, the shaft 24 accomplishing the peeling is maintained during the provides for the support as well as for the driving of whole peeling operation in spite of the fact that the 115 the drum 6.

volume of the products is successively reduced The rollers 8 are rotatable by means of a driving because of the peeling while the products are fed arrangement separate from the driving through the peeling machine. arrangement of the drum. The driving arrangement In a preferred embodiment of the peeling device for the rollers 8 comprises a driving motor 42 which according to the invention the peeling means are 120 by means of driving belts 48 through a gear box 44 adapted to remove from the products less amounts and a pulley 46 is connected with pulleys 50 on the of material while the products are fed from the shaft studs 20 of the rollers 8.

charging end to the discharging end than is The interior of the drum 6 forms a chamberto equivalent to the reduction of the size of the helically which there is connected a screw conveyor extending peeling space of the chamber. This 125 comprising a conveying screw rotatably positioned provides for a substantial improvement of the in the chamber and consisting of a shaft 54, a thread peeling operation because it is desirable to have a 56 and a driving motor 60 connected with the shaft relatively large volume available for the products at 54 through a gear box 58. The rotation of the the initial stage of the peeling operation and a conveying screw 52 feeds the potatoes through the relatively small volume available for the products at 130 drum 6 from the charging portion 10 to the 2 GB 2 190 582 A 2 discharging portion 12. During this feeding it is possible to provide the desired reduction of the conveyance the potatoes are peeled by contact with 50 peeling space available for the potatoes otherwise the rotating rollers 8 which have a surface covering than by reducing the pitch of the conveying screw consisting of grinding or cutting grits of for example thread. For example, it is possible to use threads carborundum. During the feeding of the potatoes having an increasing wall thickness from the through the peeling machine usually about 30 to charging portion to the discharging portion of the 35% of their volume is removed. Because of the fact 55 drum. It is also possible to use a drum having a thatthe peeling machine has three functions of reduced cross sectional size from the charging movement independent of each other, i.e. the portion towards the discharging portion.

rotation of the drum, the rotation of the conveyor

Claims

screw and the rotation of the rollers, there is an CLAIMS effective potato

peeling function. 60 1. A peeling machine for vegetable products, In accordance with the invention the thread 56 of especially potatoes, comprising a chamber having a the conveying screw 52 has a pitch which decreases charging end and a discharging end, a screw in the direction from the charging portion 10 conveyor comprising a conveying screw rotatably towards the discharging portion 14, i.e. in the journalled in the chamber for continuously feeding feeding direction of the conveying screw 52. This 65 the products through the chamber from the provides for a further improvement of the efficiency charging end to the discharging end, and means for of the peeling machine both with regard to the peeling the products while the products are fed peeling result as well as to the capacity of the through the chamber, in which the thread of the machine. In the embodiment shown in the drawings conveying screw and a peripheral surface of the the pitch of the thread 56 is reduced to such a 70 chamber enclosing said screw constitute in the degree that the pitch at the discharging portion 14 is chamber a peeling space extending helically from about 75% of the pitch at the charging portion 10. the charging end to the discharging end of the Thus, the volume available forthe potatoes between chamber, said peeling space being of decreasing two turns of the thread is twice as large as the size from the charging end towards the discharging charging portion 10 of the drum as at its discharging 75 end of the chamber.

portion 14, providing thatthe products have at the
2. A peeling machine as claimed in Claim 1, in discharging portion less space available and are which the peeling means are adapted to remove more tightly aggregated than atthe charging less volumes of materials from the products than is portion of the drum in spite of the fact that the total equivalent to the reduction of the size of the helically volume of the potatoes is reduced by 30 to 35% 80 extending peeling space of the chamber while the during the peeling operation. This means that the products are fed from the charging end to the potatoes are more easily moveable in the drum discharging end of the chamber.

during the initial stage of the peeling which is
3. A peeling machine as claimed in Claim 1 or 2, in important for obtaining a uniform peeling of the which the pitch of the conveying screw thread potatoes, while an efficient peeling is obtained by 85 decreases from the charging end towards the the fact that the potatoes are successively more discharging end of the chamber.

powerfully pressed against the peeling rollers 8
4. A peeling machine as claimed in any of Claims 1 because of the successively reduced pitch of the to 3, in which a peripheral surface of the chamber is thread 56. The successively reduced pitch of the constituted by a number of rotatable rollers thread provides for an increased processing time for 90 provided with a covering adapted to remove the the potatoes at a certain rotational speed of the peel of the products, said rollers thereby conveying screw which improves the efficiency of constituting the peeling means of the peeling the peeling. Thus, in a peeling machine according to machine.

the invention there is an improved peeling result as
5. A peeling machine substantially as well as an increased capacity. 95 hereinbefore described with reference to, and as In the peeling machine according to the invention illustrated in, the accompanying drawings.

Printed for Her Majesty's Stationery Office by Courier Press, Leamington Spa, 11187. Demand No. 8991685. Published by the Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies may be obtained.