Abstract: A method of producing an oil seal with a wavy lip-line by plastically deforming the flange of the metallic ring of the oilseal.

Abstract: A catalyst composition and a process for preparing same comprising the reaction product of (a) an organo-metallic compound having the general formula R'nM, wherein n is an integer, at least one R' is an alkyl group, an alicyclic group, or halogen, hydroxy or alkoxy derivatives thereof, or hydrogen, the remaining R' groups are alkyl groups, alicyclic groups, alkaryl groups, aralkyl groups, aryl groups, or halogen, hydroxy or alkoxy derivatives thereof, and M is a metal of Group II or Group III of the periodic Table, (b) a co-catalyst component which is sulfur or a compound containing active hydrogen atoms, and (c) carbon dioxide. The catalyst composition is used in preparing copolymers of epoxy compounds with carbon dioxide.

Abstract: A device for sealing a door of a coke oven includes a ring-shaped steel packing fitted over an outer surface of the door so as to contact a side wall of the coke oven when the door is closed, a packing retainer fitted over the outer surface of the steel packing and provided with a ring-shaped groove opened toward the side wall and a ring-shaped packing assembly fitted into the groove so as to press against the side wall. The packing assembly extends closer to the side wall of the coke oven than the steel packing.