Abstract: Filter assemblies are described. In particular, a filter securement assembly for receiving and retaining a filter media in an exhaust hood is disclosed, the filter securement assembly being releasably securable to the exhaust hood, includes a filter frame, a cover and a face forming a portion of the cover, the face defining a plurality of apertures therethrough, the apertures forming at least 50% of a face surface area.

Abstract: A multilayer article including a film layer having a textured first surface and an opposite second surface, wherein the film layer is printable, and a nonwoven material layer bonded to the second surface of the film layer. The film layer may include a semi-crystalline polylactic acid and may be receptive to inkjet printing.

Abstract: A multilayer article including a film layer having a textured first surface and an opposite second surface, wherein the film layer is printable, and a nonwoven material layer bonded to the second surface of the film layer. The film layer may include a semi-crystalline polylactic acid and may be receptive to inkjet printing.

Abstract: A luminaire includes a light source (101), and a first free-form reflector (110) registered with the light source (101) and receiving non-collimated light (102) from the light source (101). A secondary reflector (120) is configured to receive the non-collimated light reflected from the first free-form reflector (110). A second free-form reflector (110) is configured to receive the non-collimated light reflected from the secondary reflector (120). A virtual source reflector (125) is registered with the second free-form reflector (110) and configured to receive the non-collimated light reflected from the second free-form reflector (110).

Abstract: The disclosure generally relates to concentrating daylight collectors and in particular to concentrating daylight collectors useful for interior lighting of a building. The concentrating daylight collectors generally include a cassegrain-type concentrator section that provides for a full-tracking solar collector with one moving part and with a high efficiency of coupling of collected solar irradiation to a stationary duct. In some cases, the disclosed concentrating daylight collectors can be used more conventionally, such as for directing sunlight onto a photovoltaic cell for generation of electrical power, or an absorbing surface for extraction of thermal energy.

Abstract: A floor cleaning tool is disclosed. The floor cleaning tool comprises a mop head including a perimeter, a working surface and back surface, opposite the working surface. The working surface includes a contact surface and a recessed surface. The contact surface is on a portion of the working surface for making contact with the surface to be cleaned. The contact surface includes a first capturing edge and a second capturing edge. The recessed surface is on a portion of the working surface and includes a first side surface recessed from the first capturing edge of the contact surface and a second side surface recessed from the second capturing edge of the contact surface. The entire contact surface is nonlinear.

Abstract: A luminaire includes a light source (101), and a first free-form reflector (110) registered with the light source (101) and receiving non-collimated light (102) from the light source (101). A secondary reflector (120) is configured to receive the non-collimated light reflected from the first free-form reflector (110). A second free-form reflector (110) is configured to receive the non-collimated light reflected from the secondary reflector (120). A virtual source reflector (125) is registered with the second free-form reflector (110) and configured to receive the non-collimated light reflected from the second free-form reflector (110).

Abstract: The disclosure generally relates to concentrating daylight collectors and in particular to concentrating daylight collectors useful for interior lighting of a building. The concentrating daylight collectors generally include a cassegrain-type concentrator section that provides for a full-tracking solar collector with one moving part and with a high efficiency of coupling of collected solar irradiation to a stationary duct. In some cases, the disclosed concentrating daylight collectors can be used more conventionally, such as for directing sunlight onto a photo-voltaic cell for generation of electrical power, or an absorbing surface for extraction of thermal energy.

Abstract: Devices for dispensing material from a deformable tube comprise a shell having a top portion and a bottom portion. The shell comprises two shell pieces, the shell defining a compartment adapted for receiving a deformable tube and having an aperture in its top portion. Each shell piece comprises a press portion having a groove surrounding the press portion and a hinge located in the bottom portion connecting the press portion to the shell piece. The inner surfaces of the press portions have pressing features configured to squeeze a deformable tube from the bottom of the tube to the top of the tube.

Abstract: First and second optical films in a stack each have a structured surface defining extended Fresnel lenses. First and second Fresnel lenses of the respective first and second films extend generally parallel to different first and second in-plane axes respectively. The films may be attached together such that light transmitted by one film is intercepted by the other. The film stack may also include a diffuser disposed to scatter light transmitted by the optical film(s). Other disclosed decorative articles include an individual optical film having a structured surface with transmissive facets arranged in a cyclic slope sequence from substantially zero to a maximum positive slope to substantially zero to a maximum negative slope and back to substantially zero, the sequence repeating over some or all of the structured surface. The slope sequence may define alternating focusing and defocusing Fresnel lenses, and the Fresnel lenses may be extended and linear.

Abstract: Devices for dispensing material from a deformable tube comprise a shell having a top portion and a bottom portion. The shell comprises two shell pieces, the shell defining a compartment adapted for receiving a deformable tube and having an aperture in its top portion. Each shell piece comprises a press portion having a groove surrounding the press portion and a hinge located in the bottom portion connecting the press portion to the shell piece. The inner surfaces of the press portions have pressing features configured to squeeze a deformable tube from the bottom of the tube to the top of the tube.