Abstract: An assembly and method of reducing discoloration of a foam material resulting from laser processing the material comprising an assembly configured for positioning below the material being processed and for directing air into open cells of the open-cell foam material to pressurize the material during laser processing. The assembly comprises an air delivery mechanism comprising one or more apertures for an air chamber positioned directly below the material travel path. Aligning the one or more apertures with the axis of the laser beam and its focal point when the material is positioned above the one or more apertures and pressurizing or filling of the open cells with air in the direct vicinity of the target area reduces processing related discoloration of the material. The cells are laser processed concurrently with pressurization thereby substantially reducing settling of debris and smoke on the material and reducing discoloration.

Abstract: An assembly and method of reducing discoloration of a foam material resulting from laser processing the material comprising an assembly configured for positioning below the material being processed and for directing air into open cells of the open-cell foam material to pressurize the material during laser processing. The assembly comprises an air delivery mechanism comprising one or more apertures for an air chamber positioned directly below the material travel path. Aligning the one or more apertures with the axis of the laser beam and its focal point when the material is positioned above the one or more apertures and pressurizing or filling of the open cells with air in the direct vicinity of the target area reduces processing related discoloration of the material. The cells are laser processed concurrently with pressurization thereby substantially reducing settling of debris and smoke on the material and reducing discoloration.

Abstract: An assembly and method of reducing discoloration of a foam material resulting from laser processing the material comprising an assembly configured for positioning below the material being processed and for directing air into open cells of the open-cell foam material to pressurize the material during laser processing. The assembly comprises an air delivery mechanism comprising one or more apertures for an air chamber positioned directly below the material travel path. Aligning the one or more apertures with the axis of the laser beam and its focal point when the material is positioned above the one or more apertures and pressurizing or filling of the open cells with air in the direct vicinity of the target area reduces processing related discoloration of the material. The cells are laser processed concurrently with pressurization thereby substantially reducing settling of debris and smoke on the material and reducing discoloration.

Abstract: An assembly and method of producing one or a plurality of reservoirs or wells having a bulge when viewed in cross-section, in a foam material, with a laser processing system. The assembly comprises a housing configured to receive a galvo therein, and wherein the first housing has exterior surface topography comprising a plurality of apertures; a compression mechanism comprising an exterior surface topography having a plurality of surface protrusions thereon for compressing the material passing over at least one of the plurality of surface protrusions; and wherein the housing and the compression mechanism are spaced apart providing a gap there between for receiving a web of the material therein. Laser processing comprises compressing the material around a target area on a first surface of the material and concurrently directing a focal point of a laser beam to the target area to produce the reservoirs.

Abstract: An assembly and method of reducing discoloration of a foam material resulting from laser processing the material comprising an assembly configured for positioning below the material being processed and for directing air into open cells of the open-cell foam material to pressurize the material during laser processing. The assembly comprises an air delivery mechanism comprising one or more apertures for an air chamber positioned directly below the material travel path. Aligning the one or more apertures with the axis of the laser beam and its focal point when the material is positioned above the one or more apertures and pressurizing or filling of the open cells with air in the direct vicinity of the target area reduces processing related discoloration of the material. The cells are laser processed concurrently with pressurization thereby substantially reducing settling of debris and smoke on the material and reducing discoloration.

Abstract: A safety release pin for locking the operating mechanism of a fire extinguisher includes a shank having a blunt nose portion at one end thereof and having a portion of reduced diameter rearward of the nose portion defining parallel flat surfaces, and a pair of elongated locking members are pivotally mounted to the shank, each overlying a different one of the flat surfaces, and each defining a cam surface which coacts with surfaces of the operating mechanisms as the pin is inserted to pivot the locking members towards the flat surfaces to facilitate insertion, rearward movement being limited by projections on the undersurface of the locking members, maintaining interference betwen the locking members and the apparatus. When the pin is withdrawn, detent surfaces of the locking members coact with surfaces of the operating mechanism to rotate the locking members forwardly, severing the locking members from the shank.

Abstract: A safety release pin for locking the operating mechanism of a fire extinguisher includes a shank having a longitudinal slot near one end defining parallel side walls, each formed with a vertical groove, which attach a nose portion to the end of the shank. An elongated locking member pivotally mounted to the shank overlying the slot defines a cam surface which coacts with surfaces of the operating mechanism as the pin is inserted to pivot the locking member into the slot to facilitate insertion, the locking member springs back to its locking position. When the pin is withdrawn, a detent surface of the locking member coacts with surfaces of the operating mechanism to deflect the nose portion downwardly tearing the side walls apart along the grooves, severing the nose portion from the shank.

Abstract: A discharge valve assembly for a fire extinguisher container includes a housing defining a passageway providing communication between the container outlet and a nozzle. An elongated tubular valve stem is axially movable in the passageway between open and closed conditions with respect to a valve seat in the passageway, the stem projecting from the passageway for engagement by an actuating lever. An elongated indicating rod, shorter than the valve stem, is coaxially movable therein between extended and retracted conditions. A bias spring and the pressure in the container holds the valve stem closed, and the pressure in the container holds the indicating rod extended. A bias spring urges the indicating rod toward a retracted position. To check the pressure the indicating rod is manually depressed, the extent to which it returns to its extended condition being indicative of the magnitude of the pressure in the container.