Abstract: A thermosensitive recording material is disclosed, which comprises a support, an intermediate layer comprising an expanded plastic filler, formed on the support, and a thermosensitive coloring layer formed on the intermediate layer, in which an electroconductive agent is contained in an effective amount in at least one of the intermediate layer or the thermosensitive coloring layer.

Abstract: A thermosensitive recording material comprising a support material and a thermosensitive coloring layer formed on said support material, said thermosensitive coloring layer comprising a colorless or light-colored leuco dye and a color developer capable of inducing color formation in said leuco dye upon application of heat thereto, the improvement wherein said leuco dye is a compound having general formula (I), ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen or an alkyl group having a substituent, R.sup.5 and R.sup.6 each represent hydrogen or a phenyl group which may have a substituent, and R.sup.7 represents an alkyl group which may have a substituent or a phenyl group which may have a substituent,and said color developer is a compound having general formula (II), ##STR2## wherein X.sup.1, X.sup.2, X.sup.3 and X.sup.4 each represent hydrogen or an alkyl group having 1 to 4 carbon atoms.

Abstract: A thermosensitive recording material is disclosed which comprises (a) a support material, (b) a plurality of undercoat layers successively overlaid on the support material, and (c) a thermosensitive recording layer formed on the undercoat layers.

Abstract: Air is pumped into the engine exhaust manifold to promote oxidation of unburned remnants in exhaust gas when the temperature in a catalytic converter is below a safe level. The air supply to the exhaust manifold is shut off and air is pumped into the catalytic converter to cool it if the temperature goes above the safe level. The catalytic converter includes a catalytic means, having an outer periphery, which is resiliently supported away from the inner circumference of the converter casing. Upon the catalytic means reaching a predetermined maximum temperature, air is pumped into the annular space located between the outer periphery of the catalytic means, which may comprise either a particulate or a monolithic catalyst, and the inner circumference of the casing.

Abstract: A catalytic converter having a metallic resilient flexible member to tightly hold a unitary, solid skeletal catalytic element within a casing of the catalytic converter. The member is bonded with the outer surface of the catalytic element via a ceramic cement and with the inner surface of the casing of the converter via a plurality of plugs of weld metal formed in openings in a lateral wall of the casing and effective to bond the member to the casing.