Disclosed are processes for producing molded polyurethane elastomers and products, such as filter end caps, that include such elastomers. The elastomers are the reaction product of a non-foaming reaction mixture comprising an isocyanate-reactive composition and an organic polyisocyanate prepolymer with an internal mold release agent.

Filter assemblies are described which may be rolled for use and unrolled for cleaning. Rolling an assembly may form a spiral path for fluid to flow. Fluid also may flow through mesh panels of the assembly unless such panels are obstructed, as by debris.

A media pack includes a filtration sheet and a support sheet engaged with the filtration sheet. The support sheet includes a first perforated sheet and a first media sheet, the first perforated sheet and the first media sheet being corrugated. The filtration sheet and the support sheet are wound together in a substantially spiral shape. The filtration sheet and the support sheet together form a plurality of channels that are alternatively sealed on opposing ends of the media pack.

A filter has a filter center tube that includes a plurality of layers of solidified material including a first layer with a first undulating strip of solidified material extending in a first predetermined direction, and a second layer with a second undulating strip of solidified material extending in a second predetermined direction. The first layer is in contact with the second layer and the first predetermined direction is not parallel with the second predetermined direction, forming a plurality of pores therebetween.

The invention includes a filtration medium for the purification of a liquid or a gas material that includes a mat having a first surface and a second surface. At least one of the first surface or the second surface is substantially non-planar. The mat comprises a foamed resin having a density of about 1 lbs/ft3 to about 3 lbs to ft3 and/or an indentation load deflection of about 35 lbs to about 150 lbs.

Also included in the invention is a filtration medium for the purification of a liquid or a gas material comprising at least two mats, each mat having a first surface and a second surface, wherein at least one of the first surface or the second surface is substantially non-planar and has a substantially non-uniform convolution profile. Included are devices for the filtration of a liquid and/or gas that comprise one or more reactor modules. The reactor modules include the filtration medium and a substantially cylindrical chamber and/or a substantially rectangular chamber that may include sides, a top and a bottom. The chamber additionally includes a base that extends from the sides of the chamber towards the interior of the chamber and the filtration medium is disposed within the chamber.

Methods of filtering a gas or liquid material using the filtration medium are also provided, as are methods of fabrication of the modules.

Pleated filtration media, filtration media packs, and filtration elements containing projections are disclosed. The pleated filtration media includes projections on at least one surface, the projections configured to engage adjacent media sheets so as to reduce masking of the media.

The Edo Cup 2.0 is an open, suspended, accordion type paper single cup fillable completely biodegradable and recycle-able beverage disposable filter.

The filter can be in several shapes and sizes and may display corporate logs, up to an including religious symbols, sayings and holiday messages.

The filter may enclose flavors (in the filter paper) or be pre-soaked in flavors prior to packaging for sale.

A method for manufacturing a filter includes providing a computer-readable three-dimensional model of the filter, the three-dimensional model being configured to be converted into a plurality of slices that each define a cross-sectional layer of the filter, and successively forming each layer of the filter by additive manufacturing.

A filter frame, a filter cartridge, and an assembling method of the filter cartridge are provided. The method has the following steps. A filter core and a filter frame are prepared. The filter frame has a glue-cutting segment. Glue is coated around an outer wall of the filter core, and then the filter frame, which is mounted around the filter core, is pushed toward the glue to make the glue-cutting segment press the glue until the glue is cut into two parts. The inner glue part disposed between the filter core and the filter frame seals the filter cartridge. The outer glue part is disposed on an outer side of the filter frame, and is superfluous and removed. The glue-coating is combined with the mounting of the filter frame, thereby saving time and effort.

A filter has a filter center tube that includes a plurality of layers of solidified material including a first layer with a first undulating strip of solidified material extending in a first predetermined direction, and a second layer with a second undulating strip of solidified material extending in a second predetermined direction. The first layer is in contact with the second layer and the first predetermined direction is not parallel with the second predetermined direction, forming a plurality of pores therebetween.