Abstract: A method and apparatus is disclosed for induction heating weldable surfaces and moving the heated surfaces together with sufficient force to upset the surfaces while in a substantially inert atmosphere for thereby welding the surfaces together. The apparatus includes a rotary bus bar joint for moving the induction coil between the weldable surfaces, and also includes a clamping mechanism for handling members having weldable surfaces of different sizes and shapes. A pair of separately controlled induction coils may be used with or without laminations for heating tubular or solid members to an upsetting temperature.

Abstract: A method and apparatus is disclosed for purging air from multiple surfaces of members to be welded together. The apparatus includes a hood with the inert gas entering the hood at about 150 cubic feet per minute at between 2-5 pounds per square inch gauge when handling approximately 21/2 inch diameter tubes. The gas is first evenly spread in the hood to fill the entire cross sectional area thereof and is then moved through a straightening section to provide laminar flow of the gas across the multiple surfaces. An induction coil is moved between hood closure means into the hood to heat the weldable surfaces to a bonding temperature and after the coils have been removed from the hood, the members are urged together to upset the heated surfaces to weld the two members together.

Abstract: A novel process is disclosed for the manufacture of a release "paper" which is based on the application of a fluid silicone composition to a paper substrate. The silicone fluid is directly applied without any solvent and without emulsification. The application technique is based on the use of a two-roll offset gravure coating apparatus wherein the substrate to be coated is run at a higher speed than the gravure roll.

Abstract: A polysiloxane surfactant useful in controlling the foaming of a polyurethane foam having the formula, ##STR1## where y is a whole number varying from 15 to 150 and z is a whole number varying from 3 to 16 where R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms, R.sup.2 is selected from alkylene and arylene radicals of from 11 to 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30 for the case n is equal to 2, x varies from 1 to 40 for the case n is equal to 3 and 4 where there may be ether units with n equal to 2,3, and 4 in the same molecule.

Abstract: A novel process is disclosed for the preparation of a polysiloxane that is useful in the preparation of an emulsion for rendering flexible sheet material non-adherent to surfaces which normally adhere thereto.

Abstract: A novel process is disclosed for the preparation of a polysiloxane that is useful in the preparation of an emulsion for rendering flexible sheet material non-adherent to surfaces which normally adhere thereto.

Abstract: A compound havng the formula: ##EQU1## WHERE R and R' are monovalent hydrocarbon radicals of less than 8 carbon atoms and R.sup.2 is selected from alkylene and arylene radicals of less than 20 carbon atoms, n is an integer that varies from 2 to 4, x varies from 5 to 30, for the case n is equal to 2 and x varies from 1 to 40, for the case n is equal to 3 and 4 where there may be ether units with n equal to 2, 3 and 4 in the same molecule, a is a number varying from 1.51 to 1.99 and b varies from 0.019 to 0.45 where the sum of a + b varies from 2.012 to 2.1.