A method for producing enveloped electroscopic filter material can include feeding, from a main spool, at least one sheet of electroscopic filter material in a first direction, feeding, from a pair of spools, sheets of cover material in the first direction such that each spool feeds a sheet of cover material along a different side of the sheet electroscopic filter material, sealing, via a pair of heat-sealing roller nips, the at least one sheet of electroscopic filter material and the sheets of cover material periodically together to form sealed portions, and cutting, via a cutting mechanism, each sealed portion to produce envelopes of electroscopic filter material. The at least one sheet of electroscopic filter material can extend to the outermost edges of each envelope such that each envelope comprises substantially the same dimensions as the at least one sheet of electroscopic filter material.

A filter element for filtering a fluid comprising a filter medium pack having an axial inlet side for receiving the unfiltered fluid and a circumferential side forming a radial boundary of the filter medium pack. The filter medium pack is configured for insertion into a housing of a filter system so as to enclose or partly enclose the circumferential side of the filter medium pack with an outer sidewall of the housing. The filter element comprises a bridge seal arrangement having a first collar-shaped portion comprising a first circumferential sealing surface sealingly coupled to the circumferential side of the filter medium pack or sealingly coupled to a border of the axial inlet side, and a second collar-shaped portion comprising a second circumferential sealing surface configured for encircling and sealingly cooperating with the outer sidewall of the housing.

An air filter apparatus includes an air filter having a filtering medium at least partially housed within a housing. A cover is coupled with the air filter. A collapsed disposal bag is situated at least partially between the cover and air filter and may be secured to (or coupled with) the air filter. The cover is configured to be manually opened to expose the disposal bag and allow expansion of the bag. Before the cover is opened it is configured to retain the bag in the collapsed configuration. The bag in the expanded configuration is sized to receive and enclose the air filter. In implementations the air filter is a residential or commercial HVAC air filter. Methods of manufacture include securing the bag to the air filter, configuring the bag in the collapsed configuration, and securing the cover over the bag to keep it collapsed until the cover is opened.

A method of packaging a filter media that is pre-folded for insertion is a filter assembly is provided.

Filter cartridge arrangements, features thereof and assembly for use therewith, are provided. Selected filter cartridge features are disclosed. Methods of assembly and systems for use are described.

The disclosed filter and/or debris disposal system is configured to easily dispose of filter elements, filter media, and/or debris with minimal resources, and/or effort. In some examples, a flexible container is employed to enclose a used filter element prior to removal of the filter from the extractor.

An air filter apparatus includes an air filter having a filtering medium at least partially housed within a housing. A cover is coupled with the air filter. A collapsed disposal bag is situated at least partially between the cover and air filter and may be secured to (or coupled with) the air filter. The cover is configured to be manually opened to expose the disposal bag and allow expansion of the bag. Before the cover is opened it is configured to retain the bag in the collapsed configuration. The bag in the expanded configuration is sized to receive and enclose the air filter. In implementations the air filter is a residential or commercial HVAC air filter. Methods of manufacture include securing the bag to the air filter, configuring the bag in the collapsed configuration, and securing the cover over the bag to keep it collapsed until the cover is opened.

The invention relates inter alia to a device (10) for filtering air flows, comprising a filter frame (22), an exchangeable filter nonwoven (23) and a holding device (24) by means of which the filter nonwoven can be held in place on the filter frame. A special feature of the invention is inter alia that the filter nonwoven is compressed and is arranged in a transport packaging (30) particularly in a vacuumized state.

A filter baffle assembly, including a filter cap engageable to a mouth of a container, the filter cap including a filter vent operatively attached to a liner situated within an inner space of the filter cap, and a gas permeable baffle disposed between a mouth of the container and the filter vent, covering the filter vent, the baffle including a single perforation to permit gas exchange between an interior of the container and the filter vent, and to protect the filter vent from contact with contents housed in the interior of the container. A gas permeable point baffle for protecting a filter vent from contact with the contents of a container, including a single perforation, the point baffle being welded to a liner and covering a filter vent operatively attached to the liner, housed within a cap engageable to the mouth of the container. A method for protecting a filter vent from the contents of a container.

The present disclosure is related to filter elements and more specifically to filter elements for removing dust from air. In an embodiment, an inventive filter element includes a housing having a first side and a second side, filter material in the housing, a space between the filter material and the first side of the housing for forming a suction chamber, and at least one hole in the first side, whereby the area within the circumference of the side of the filter material facing the first side of the housing is larger than the area of at least one hole.