Abstract: A light guide comprising a polymeric layer at least 25 percent transmissive over at least a 30 nm bandwidth in a wavelength range from 180 to 280 nm over a distance of at least 100 micrometers and visible light transparent reflecting layers (UV-C mirror) that are at least 50 percent reflective over at least 30 nm bandwidth in a wavelength range from 180 to 280 nm over an incident light angle of 0 to 90 degrees and that are at least 25 percent transmissive of visible light over at least 30 nm bandwidth in a wavelength range of 400 to 800 nm over an incident light angle of 0 to 90 degrees. The light guide is useful, for example, for antimicrobial surfaces.

Abstract: A spray dispenser includes an outer body, a product bag containing a liquid product disposed in the outer body, and a valve disposed at an upper end of the outer body. An elastic energy-storing member is disposed below the bag, and an energizing member is disposed below the energy-storing member for compressing the latter. The energizing member is raised by rotation of a threaded post which extends through the energizing member in threaded connection therewith. The post comprises a plurality of screws telescopingly arranged to define separate stages of operation, whereby the screws move from a retracted relationship to an extended relationship as the energizing member moves upwardly.

Abstract: A valve comprises upper and lower sections which are rotatable relative to one another about a longitudinal axis. Relative rotation in one direction causes the valve to open, and relative rotation in the opposite direction causes the valve to close. Opening and closing of the valve is caused by a camming arrangement between the two valve sections. One of the valve sections includes an outer skirt which is cammed outwardly as the valve sections are axially forced together during assembly, to enable the cam elements to snap together. Each valve section is of one piece plastic molded construction.

Abstract: A dispenser comprises a housing, a product-containing bag disposed within the housing, and a valve for discharging product from the bag. An energy-storing member, in the form of a gas-filled bellows, or a cellular foam element, is disposed beneath the product-containing bag and is raisable thereagainst to pressurize the product within the bag. An overload preventing mechanism prevents energy-storing member from being excessively compressed. The valve and product-containing bag are removable as a unit from the housing to enable an identical refill unit to be installed.

Abstract: A dispenser comprises a container, a product-containing bag disposed within the container, and a valve for discharging product from the bag. A piston is disposed beneath the bag and is raisable by a manually rotatable post which is threadedly connected to a central through-hole of the piston. A closed-cell foam element is disposed between the piston and the bag and is elastically compressed when the piston is raised, in order to store energy and pressurize the contents of the bag. A stiff disc is disposed between the foam element and the bag and includes a central through-hole. The threaded post extends upwardly through the piston, the foam element, and the disc, and terminates within a downwardly open cavity formed in the bag. The valve and bag are connected to the container to be removed therefrom as a unit and replaced by a similar refill unit.