Arrangement for a plansifter
AssigneeBuehler AG
InventorAlois Keller
Life of this patent
Estimating the term…
Abstract
A large or square plansifter has a large number of sieve stacks with e.g. more than 20 sieve boxes. Such boxes are constructed without a supporting grating and design so as to be exchangeable in the covered state and so that they can be placed on or in the sieve frames. A free product fall-through space or discharge space is accordingly formed between the sieve screen and a flat base plate. The sieve cleaners are placed on or in the flat base plate. In a particularly preferred manner, the sieve frames are constructed as metal frames. The sieve cleaners clean the sieve screen and clear the product from the base plate. The sieve cleaners preferably have 2, 3 or 4 arms.
Claims21
A plansifter sieve comprising:
- a sieve box having a outer frame, a base plate, at least one box partitioning strip for dividing the sieve box into a plurality of cleaning zones, and a discharge opening corresponding to each cleaning zone;
- a removable, exchangeable sieve frame covering the sieve box, the sieve frame having a sieve covering on only one side;
- and
- a plurality of freely movable cleaning members, wherein each cleaning zone has at least one freely movable cleaning member.
A removable, exchangeable sieve frame for covering a sieve box comprising:
- a rigid rectangular metal frame having a top side;
- at least one metal partitioning member connected to and extending between two opposing sides of the rigid rectangular metal frame;
- and
- a covering mounted on only one side of the rigid rectangular frame, the covering being a sieve covering and being mounted on only the top side of the rigid rectangular frame, whereby the frame possesses sufficient rigidity to resist deformation thereby allowing the metal frame, the partitioning member, and the sieve covering to be removable from the sieve box as a unit.
A cleaning member for a plansifter, wherein the plansifter includes a covering, a base plate and a discharge opening, the cleaning member comprising:
- a boomerang-shaped body having a vertex and two ends and a vertical gravitational axis;
- covering cleaning means disposed on the top of each of the two ends;
- a projection disposed on an extension arm extending from the vertex and away from the two ends for clearing the base plate and discharge opening;
- and
- a wobble foot in the region of the vertical gravitational axis.
A cleaning member for a plansifter, wherein the plansifter includes a covering, a cleaning zone, a base plate and a discharge opening, the cleaning member comprising:
- a main body with a plurality of extension arms and having a vertical gravitational axis;
- covering cleaning means disposed on at least two of the plurality of arms;
- an outwardly extending projection disposed on at least one of the plurality of arms for clearing the base plate and discharge opening;
- and
- a wobble foot in the region of the vertical gravitational axis.
A plansifter for sifting ground grain products comprising:
- a plansifter housing;
- centrifugal drive means for imparting a circular motion to the housing;
- support means for supporting the housing;
- stack means for feeding the ground grain products to the top of the plansifter;
- discharge sleeve means for removing the sifted ground grain products from the bottom of the plansifter;
- and
- a plurality of plansifter sieves located in the housing and arranged one above another, each plansifter sieve comprising:
- a sieve box having a outer frame, a base plate, at east one box partitioning strip for dividing the sieve box into a plurality of cleaning zones, and a discharge slot opening corresponding to each cleaning zone;
- a removable, exchangeable sieve frame covering the sieve box, the sieve frame having a sieve covering on only one side;
- and
- a plurality of freely movable cleaning members, wherein each clearing zone has at least one freely movable cleaning member.
A removable, exchangeable sieve frame for covering a sieve box comprising:
- a rigid rectangular metal frame having a top side and a bottom side;
- at least one metal partitioning member connected to and extending between two opposing sides of the rigid rectangular metal frame;
- and
- a sieve covering mounted on only the top side of the rigid rectangular frame, whereby the bottom side is open and the frame possesses sufficient rigidity to resist deformation thereby allowing the metal frame, the partitioning member, and the sieve covering to be removable from the sieve box as a unit.
Dependencies are inferred from the claim text.