Abstract: The tire for a vehicle comprises a main body of the tire made from a rubber composite material and a rim to form a toroidal space therein, accommodates a toroidal pneumatic tube expandable due to its elasticity in the space for liquid, and the pneumatic tube has a smaller volume than that of a form obtained by depressing the space for liquid to a desired level by a road surface at the point of time when the tube is filled with air at a specified pressure required for supporting a load imposed on the tire, and the space for liquid in the depressed form which is outside of the tube is filled with liquid so that a desired ground contact area of the tire can be obtained under the load.

Abstract: In an intermittent heating apparatus for plasticized fluids in injection or similar moldings, heating medium passages are located outside the electric resistance heating tubes for a liquid or gas to pass therethrough while being in contact with the outer surfaces thereof, also provided is a heating/cooling device having both a high temperature heating medium heated to a high temperature close to the temperature at which said reaction of the raw material is rapidly promoted and a low temperature heating medium of a temperature range where the promotion of said reaction of the raw material can be neglected.

Abstract: A process of extrusion molding plasticized vulcanizable or cross-linkable rubber or synthetic resin materials, comprising the steps of heating said materials to an elevated temperature in a short time immediately before a molding die and vulcanizing or cross-linking the materials in the manner of maintaining said elevated temperature substantially while the materials are passing through the die or for a while after they have passed through the die, thereby obtaining mold goods.