Claims (4)
1. Sito, koje se sastoji od ploča (2) postavljenih okomito u smjeru sijanja (S), sa zadebljanim gornjim rubovima i poprečno postavljenim zakrivljenim profilima (3) s tangentama na svojim gornjim krajevima, koje definiraju ravninu sita (7) paralelno sa smjerom sijanja (S), slobodni razmak između susjednih ploča (2) i susjednih profila (3), koji slijedom navođenja određuje veličinu (širinu) sita (M), naznačen time, da:
a) udaljenost (H) između ravnine sita (7) i gornjeg vrha zadebljanih rubova (4) iznosi najmanje 30 % širine sita (M), poželjno najmanje 50 % širine sita (NI) i, posebno poželjno najmanje 100 % širine sita (M);
b) polumjer zakrivljenosti ® zakrivljenih profila (3) iznosi najmanje 30 % širine sita (M), po mogućnosti najmanje 60 % širine sita (NI) te, posebno poželjno najmanje 100 % širine sita (NI), te, ako je prikladno,
c) krajnji dijelovi (područja) (5, 9) profila (3) koji su izrađeni bez pregiba protežu se tangencijalno od zakrivljenog dijela (6).1. Sieve, which consists of plates (2) placed vertically in the sowing direction (S), with thickened upper edges and transversely placed curved profiles (3) with tangents at their upper ends, which define the plane of the sieve (7) parallel to the direction sowing (S), the free distance between adjacent plates (2) and adjacent profiles (3), which determines the size (width) of the sieve (M) according to the sequence of instructions, indicated by the fact that:
a) the distance (H) between the plane of the sieve (7) and the top of the thickened edges (4) is at least 30% of the width of the sieve (M), preferably at least 50% of the width of the sieve (NI) and, particularly preferably, at least 100% of the width of the sieve (M );
b) the radius of curvature ® of the curved profiles (3) is at least 30% of the sieve width (M), preferably at least 60% of the sieve width (NI) and, especially preferably, at least 100% of the sieve width (NI), and, if appropriate,
c) the end parts (areas) (5, 9) of the profile (3), which are made without folds, extend tangentially from the curved part (6).
2. Sito u skladu s patentnim zahtjevom 1, naznačeno time, da je širina (D) zadebljanih rubova (4) najmanje dvostruko, poželjno trostruko, a osobito poželjno četverostruko veća od širine ploče (2)2. Sieve according to patent claim 1, characterized in that the width (D) of the thickened edges (4) is at least twice, preferably three times, and especially preferably four times greater than the width of the plate (2)
3. Sito u skladu s patentnim zahtjevom 2, naznačeno time, da je gornji poprečni presjek zadebljanih rubova (4) okruglog oblika, poželjno kružnog ili eliptičnog.3. Sieve according to claim 2, characterized in that the upper cross-section of the thickened edges (4) is round, preferably circular or elliptical.
4. Sito u skladu s bilo kojim od patentnih zahtjeva 1 do 3, naznačeno time, da je kut (X) između tangente na donjoj završnoj točki zakrivljenog dijela (6) profila (3) i vodoravne ravnine najmanje 1,5 puta, poželjno bar 2,0 puta i naročito poželjno 3,0 puta veći od kuta (Y) između ravnine sita (S) i horizontalne ravnine.4. Sieve according to any one of patent claims 1 to 3, characterized in that the angle (X) between the tangent at the lower end point of the curved part (6) of the profile (3) and the horizontal plane is at least 1.5 times, preferably at least 2.0 times and especially preferably 3.0 times greater than the angle (Y) between the screen plane (S) and the horizontal plane.