A disclosed screening apparatus includes a subgrid, and a screen element attached to the subgrid via laser welding at a plurality of attachment positions such that, under vibrational excitation, the screen element has a pre-determined profile of vibrational motion relative to the subgrid. The screen element may be attached at a maximal number of attachment locations to the subgrid to minimize relative motion of the screen element and the subgrid under vibrational excitation, or the screen element may be attached a sub-set of the maximal number of attachment locations to allow vibrational motion of the screen element relative to the subgrid. A disclosed method may include attaching a plurality of screen elements to a respective plurality of subgrids, attaching the plurality of subgrids to one another to form a screening pre-assembly, and cutting edges of the screening pre-assembly to form the screen assembly having a perimeter with a pre-determined shape.

Aqueous slurry which includes solid foreign matter and paper dust is pressed by means of a screw press, provided with a mesh having openings not less than 1.5 mm and not greater than 3 mm, to separate the aqueous slurry into the solid foreign matter and the paper dust, and liquid component passing through the mesh. Then, the liquid component is sieved by means of a sieve having openings not greater than 1 mm to separate from the liquid component the solid foreign matter and the paper dust.

Provided is a pet cat excrement screening device. The pet cat excrement screening device includes a support base; a drum rotatably mounted on the support base; and a drum driving device mounted on the support base. The drum is configured to rotate between a first position and a second position under drive of the drum driving device, where the rotation angle of the drum is less than 360 degrees. A side wall of the drum body of the drum is provided with a pet inlet. The pet inlet is exposed out of the support base during a rolling process of the drum. A screening mechanism is mounted in the drum. The rear end of the drum is provided with a waste discharge port.

A chip sorting screen utilizing a plurality of shaped wire elements sized and spaced to allow for efficient sorting of wood chips and fiber elements. The chip sorting screen includes an upper surface formed of shaped wire elements arranged in parallel relationship to define slots between adjacent shaped wire elements. Each shaped wire element is mounted to a support member 10 define an upper surface. The mounting orientation of the shaped ware element to the support members can be consistent along a screen length or alternatively, the mounting orientation can change along the screen length to selectively vary sorting performance by varying slot size along the sorting screen. A height of each shaped wire element or an angle by which a leading edge of the shaped wire element is presented to the conveying path, can be selectively adjusted to increase wood chip turbulence across the sorting screen.

It is described a mining screen (100) comprising at least one propulsion element (140) associated with a screening structure (165), wherein the mining screen (100) is able to carry out (develop) at least one vibration regime, thereby promoting the screening of a material moving through the screen (100), wherein the screen (100) is configured in such a way that at least one between the propulsion element (140) and the screening structure (165) are manufactured from a first material, the first material configured as a compound (composite) material. Furthermore, it is described as a screen panel (156) applied on a mining screen (100), a control method for mining screen as well as a mining system.

A system for segregating a mixture of oxidizable catalyst material and inert support media. The system comprises an enclosure configured to contain inert gas. The enclosure includes a plurality of stacked screens disposed therein. The stacked screens include openings that decrease in size from a top of the stack to a bottom of the stack. The enclosure also includes an inlet to deliver the mixture to an uppermost stacked screen and outlets to direct the separated support media and catalyst material to a location outside the enclosure.

The invention is based on a sieving device with at least one rotary drum unit (14a; 14b) comprising a plurality of sieving openings (42a; 42b), said sieving openings (42a; 42b) being respectively arranged around a centre point of the sieving openings (42a; 42b) and being categorized in at least one first structure group (44a, 44a′, 44a″; 44b, 44b′) and at least one further structure group (46a, 46a′; 46b, 46b′), wherein in the first structure group (44a, 44a′, 44a″; 44b, 44b′) the centre points of neighbouring sieving openings (42a; 42b) are arranged at a first intra-distance (48a; 48b) to one another, and wherein in the further structure group (46a, 46a′; 46b, 46b′) the centre points of neighbouring sieving openings (42a; 42b) are arranged at a further intra-distance (50a; 50b) to one another.

It is proposed that a smallest structure distance (52a; 52b) between a centre point of at least one sieving opening (42a; 42b) in the at least one first structure group (44a, 44a′, 44a″; 44b, 44b′) and a nearest-situated centre point of at least one sieving opening (42a; 42b) in the at least one further structure group (46a, 46a′; 46b, 46b′) is greater than the first intra-distance (48a; 48b).

The horticulture classifier apparatus is intended to provide users with a sifting and sorting device that can separate multiple sizes of plant material. To accomplish this, the device includes specific surface contours and multi-purpose handling structures to be described in relation to a sieve grid. Further, the apparatus includes critical functional elements relating to the separation of whole marijuana buds, specifically, that are presented as novelties. To that end, a sifting screen is included, which may be detachably mounted onto the main classifying grid. In addition, the apparatus includes means for mounting the device on multiple kinds of totes and bins, to sequentially separate the various tiers of consumable cannabis. This arrangement may also include attachment to an external collection bin or bag, depending on the individual application of the apparatus by a user.

A continuous sieving apparatus is described. The continuous sieving apparatus includes a sieve surface attached to a wall. A set of openings is formed in the sieve surface so as to define a set of pathways extending through the sieve surface. The set of opening are defined by a length dimension that is greater than a width dimension. An action system is configured to move the sieve surface in one or more directions (e.g., horizontally and vertically). Such movement causes a first pupa having a first cephalothorax width that is less than the width dimension to move through any one of the set of openings, and a second pupa having a second cephalothorax width that is greater than the width dimension to be prevented from moving through the set of openings.

Methods and apparatuses for screening are provided. Embodiments include a screen basket apparatus for screening material, comprising a grid frame having a plurality of openings arranged in a lattice and a plurality of screening cartridge assemblies affixed to the grid frame to cover the respective openings of the grid frame. The screening cartridge assembly includes a case and a screen assembly fitted into the case, and may be affixed to a set of transversal member of the grid frame. The case may be an injection molded thermoplastic polyurethane or a thermoset polymer. The screening elements together form a generally continuous screening surface across an exterior portion of the grid frame.