Abstract: This is a device for the automatic maintenance of minimum tire pressure. The device is a self contained unit placed inside the cavity of a tire and affixed to the wheel. The unit determines the pressure therein and correlates for temperature. The device also contains an array of elements comprised of an encapsulated propellant and an igniter. If the device detects an under-pressure condition it initiates a reaction within an element. Each element, through this reaction, changes the liquid or solid propellant to a gas, thus increasing the volume of the material and therefore increasing the pressure of the gas in the tire. This process is repeatable up to the number of elements in the array.

Abstract: An improved corner bead for drywall construction having a paper layer bonded to an exterior surface of a formed metal or plastic core. The paper is impregnated with a latex prior to affixing it to the core. The uniformly impregnated paper provides improved protection against adverse abrasion at all levels of thickness of the paper. A method of making a drywall paperbead is also disclosed.

Abstract: An approved corner bead for drywall construction having a paper layer bonded to an exterior surface of a formed metal or plastic core. The paper is impregnated with a latex prior to affixing it to the core. The uniformly impregnated paper provides improved protection against adverse abrasion at all levels of thickness of the paper. An improved method for covering joints formed between abutting sheets of drywall involves spreading a bonding layer of joint compound, embedding the paper strip in that compound, applying an exterior layer of compound, and sanding the exterior layer so as to provide a smooth and continuous surface between the drywall sheets.