Abstract: A print head and method that are capable of detecting a plurality of performance conditions such as a dry-fire, no-fire or clogged-nozzle condition. Pressure wave sensors within a print head are disclosed that are capable of detecting pressure waves generated by the firing of an ink expulsion mechanism. The characteristics of the pressure wave generated by the firing event (e.g., magnitude and timing) are indicative of the operating condition within the head. Multiple sensor types are disclosed.

Abstract: A print head and method that are capable of detecting a plurality of performance conditions such as a dry-fire, no-fire or clogged-nozzle condition. Pressure wave sensors within a print head are disclosed that are capable of detecting pressure waves generated by the firing of an ink expulsion mechanism. The characteristics of the pressure wave generated by the firing event (e.g., magnitude and timing) are indicative of the operating condition within the head. Multiple sensor types are disclosed.

Abstract: A print head and method that are capable of detecting a plurality of performance conditions such as a dry-fire, no-fire or clogged-nozzle condition. Pressure wave sensors within a print head are disclosed that are capable of detecting pressure waves generated by the firing of an ink expulsion mechanism. The characteristics of the pressure wave generated by the firing event (e.g., magnitude and timing) are indicative of the operating condition within the head. Multiple sensor types are disclosed.

Abstract: A urine collection device includes a support apparatus for supporting the urine collection device on a toilet. An attachment section attaches to a sample holder and a collection section receives and directs urine into the sample holder.

Abstract: A scented wick including a wick and an aromatic substance is provided. The aromatic substances can be any material including a chemical or fire retardant. A scent enhancer may be used with the aromatic substance. The scented wick may be sealed with a thin layer of wax to prevent scent loss and prepare the scented wick for individual sale. When used, the scented wick will produce more effective scent production than conventional scented candles. Also the scented wick will extinguish with less smoldering and smoking than a conventional wick. Methods for producing the scented wick are also disclosed herein.

Abstract: A roller peg includes a housing, a roller, a pin, and a keeper. The pin affixes the roller inside the housing such that a surface of the roller protrudes from a hole in the side of the housing. The keeper holds the pin and roller in place within the housing. The roller spins within the housing when a surface of the roller contacts an exterior surface.