Abstract: A method is provided for fractionation of oil obtained by pyrolysis of lignocellulosic materials to obtain useful chemical fractions, including a phenolic fraction which is suitable as a total or partial replacement for phenol in making phenol-formaldehyde resins. The method comprises mixing the oil with a strong base such as sodium hydroxide to a pH level at which the neutral fraction of the oil is selectively soluble in a solvent such as methylene chloride or ether, and the mixture is extracted with the solvent to obtain a first extract containing the solvent and the neutral fraction, and a first raffinate containing the remaining fractions of the oil, i.e., the phenolic fraction, the organic acids fraction and an amorphous residue. The neutral fraction is recovered by distillation and the first raffinate is mixed with sulfuric acid to lower its pH to a level at which the phenolic fraction is selectively soluble in the solvent.

Abstract: A hermetically sealed pouch, being safe for the storage of foods, avoiding giving a taste to enclosed food, the filled pouch being able to withstand cooking temperatures typically used to cook food.

Abstract: A door has a flexible channel along its free edge which flexes upon striking an obstruction and brings together two conductive ribbons within the channel. The ribbons are part of an active circuit which includes a relay coil. Temporary contact of the two conductive ribbons resulting from contact with the obstruction de-energizes the relay coil, fully opening the door. Since door opening results from de-energizing a coil, a power or circuit failure will also cause the door to open.

Abstract: This invention is an improved electronic detection system for leaks in articles such as can tops and the like comprising a special ultrasonic microphone-amplification system for listening for leaks in articles, a signal averaging network to receive the signal produced by the amplifier and to improve the signal to noise ratio, an enable circuit which is synchronized with the pressurization of the article to be leak tested and which triggers the signal averaging network and a comparator to receive the averaged signal from the signal averager. The comparator produces a logic pulse for rejecting leaky articles when the averaged signal produced by the signal averaging network is above a predetermined level.

Abstract: A leak detecting device for identification of can tops and similar workpieces with leak holes has a compressed gas supply chamber providing a source of compressed gas for testing the workpieces for leaks. An acoustic testing chamber is mounted adjacent the gas supply chamber. A sealing press is provided between the chambers for holding a workpiece in a gas tight manner so that one side of the workpiece faces the compressed gas supply chamber in a gas tight relationship and the other side of the workpiece faces the acoustic testing chamber in a noise tight relationship. A valve is provided on the compressed gas supply chamber and is operable to admit compressed gas from the gas supply chamber to the side of said workpiece facing the compressed gas supply chamber. An ultrasonic microphone is disposed within the acoustic testing chamber and is adapted for detecting gas noise created by gas passing through a leak hole in the workpiece.

Abstract: A novel jewelry display rack comprises a plurality of modular display frames. This jewelry rack is of variable size and capacity and may be adaptable to a variety of store situations. The rack has a base with a plurality of upwardly directed mounting rods which support a vertical stack of modular display frames. The rods pass through channels in the display frames, allowing easy assembly without special tools. The display rack may include various pleasing decorative features including a top plate, as well as a swivel base for ease of access and display.