Abstract: A flexible tube includes a bellows tube, an interlock tube placed inside the bellows tube, and upstream-side and downstream-side joint pipes coupled to opposite ends of the bellows tube. Diameters of fixing end portions located at opposite ends of the interlock tube are made larger than a diameter at a middle portion of the interlock tube, extension portions of the upstream-side and downstream-side joint pipes are fitted and fixed to inner peripheral surfaces of the fixing end portions of the interlock tube, and a depth of each of valley portions of a bellows portion of the bellows tube located over the fixing end portions is smaller than a depth of other valley portions of the bellows portion. Accordingly, it is possible to achieve the downsizing of the flexible tube that is connected to an exhaust system being continuous with an engine to dampen vibrations in the axial direction of the exhaust system.

Abstract: A flexible tube includes a bellows tube, an interlock tube placed inside the bellows tube, and upstream-side and downstream-side joint pipes coupled to opposite ends of the bellows tube. Diameters of fixing end portions located at opposite ends of the interlock tube are made larger than a diameter at a middle portion of the interlock tube, extension portions of the upstream-side and downstream-side joint pipes are fitted and fixed to inner peripheral surfaces of the fixing end portions of the interlock tube, and a depth of each of valley portions of a bellows portion of the bellows tube located over the fixing end portions is smaller than a depth of other valley portions of the bellows portion. Accordingly, it is possible to achieve the downsizing of the flexible tube that is connected to an exhaust system being continuous with an engine to dampen vibrations in the axial direction of the exhaust system.

Abstract: A molding attaching structure includes a sash provided on an automobile door, an outer sash mounted to the sash, and a molding mounted to the outer sash. When a door glass of the door is fully closed, the molding has its one side end laid over an edge of the door glass. The molding has its outer surface substantially flush with an outer surface of an automobile body. The outer sash includes a molding attachment part projecting outwardly therefrom. The molding attachment part includes an extension part and an edge part. The edge part includes a first portion extending from the extension part away from the door glass and having a distal end bent back, and a second portion extending from the distal end across the extension part towards the door glass.

Abstract: An exhaust pipe assembly provided with a bellows pipe for connecting an upstream exhaust pipe and a downstream exhaust pipe is disposed so as to form a double pipe construction with a first joint pipe which is connected to the upstream exhaust pipe and a second joint pipe which is connected to the downstream exhaust pipe. A pair of ball receiving portions are disposed on a peripheral surface of the first joint pipe at a distance from each other in a circumferential direction, and a pair of ball receiving portions are disposed on a peripheral surface of the second joint pipe at a distance from each other in a circumferential direction. The ball receiving portions are disposed at an angular phase difference with each other in the circumferential direction.

Abstract: A method for easy and reliable manufacture of a silencer constructed with a multi-perforated inner tube and an outer tube, between which a sound-absorbing material such as glass wool, etc. is filled in, without use of a binding agent, etc. . . .

Abstract: The invention is directed to a method for easy and reliable manufacture of a silencer constructed with a multi-perforated inner tube and an outer tube, between which a sound-absorbing material such as glass wool, etc. is filled in, without use of a binding agent, etc. The invention is also directed to provide an apparatus for use in the manufacture of such silencer.

Abstract: An exhaust purifying device applicable to an exhaust system extending from an internal combustion engine has a casing and a core received in the casing. The core has a honeycomb structure implemented by a corrugated sheet metal and a flat sheet metal rolled up together in a spiral configuration. Part of the flat sheet forming the outer periphery of the core is formed with a plurality of openings. The core is locally affixed to the casing by a solder applied to the portions of the flat sheet surrounding the openings and opposite edges of the flat sheet. This is successful in surely and stably affixing the core to the casing despite that the solder is implemented as an inexpensive powdery solder.

Abstract: An exhaust purifying device for reducing toxic components contained in an exhaust emanating from an internal combustion engine. The device has a casing connected at both ends thereof to an exhaust system extending from the engine, and a core received in the casing and provided with a honeycomb structure constituted by a corrugated sheet and a flat sheet which are rolled up together in a spiral configuration. A pair of retaining members are received in axially opposite ends of the casing for preventing the core from moving in the axial direction and circumferential direction relative to the casing. Each of the retaining members radially traverses the associated end of the casing and includes a biting portion slightly biting into the associated end of the core.

Abstract: In an exhaust purifying device for an internal combustion engine, a honeycomb core is constituted by a single webbing which is implemented as foil of stainless steel. The webbing is made up of a flat portion and a corrugated portion adjoining each other in the longitudinal direction of the webbing. The flat portion is held by a core metal forming part of a jig at a particular position which is a predetermined distance remote from a position where the corrugated portion begins. The core metal is rotated about its own axis in such a direction that the flat portion underlies the corrugated portion. As the core metal is rotated, the flat portion forms a core portion around the core metal. Thereafter, the corrugated portion and flat portion are sequentially wound around the core metal while lying one above the other to thereby form the honeycomb core. The honeycomb core is received in a casing to be attached to the exhaust system of the engine.

Abstract: This invention relates to a novel electroless plating method which requires no pre-treatment step for the surface-corrosion on the surface to be plated, wherein a metal layer is formed by applying, onto the surface to be plated, a solution of a composition consisting of a styrene type elastomer used generally as a component for the hot melt type adhesive agent, or the styrene type elastomer and a stickiness imparting resin of a molecular structure similar to that of the elastomer; drying the solution as applied; and effecting the electroless plating on the coated film thus obtained, the method being able to substitute the conventional electroless plating as an advance step of the electrolytic plating for synthetic resin. The particular object of the present invention is to utilize the method in the field of the electroless plating for the purpose of preventing the plating operation from the electromagnetic wave disturbances.

Abstract: A method for manufacturing a molding for vehicles which comprises the steps of forming a stainless steel web into a main body having a predetermined cross section; adhesively attaching members of soft synthetic resin longitudinally to the main body with a portion of the main body projecting beyond the synthetic resin members and the adhesive spaced inwardly from the edge of the synthetic resin members adjacent such projecting portion of the main body and subjecting the main body with the adhesive and resin members thereon to chromium-plating, thereby chromium-plating the exposed surface of the stainless steel main body.

Abstract: A monolithic catalyst converter for use with a car, motorcycle or the like for purifying exhaust gas emanating therefrom. A cylindrical casing is made up of longitudinally divided cylindrical casing halves and stores a catalyst carrier which is wrapped in a retainer member. Flanges extend on each of the casing halves in the lengthwise direction of the casing. Predetermined magnitudes of load are applied in predetermined directions to the cylindrical casing to mate the flanges to each other and, in the mating position, the flanges are rigidly connected to each other.

Abstract: A tube of a muffler for an internal combustion engine includes at least two generally rectangular sheets which are joined together at one end by crimping and wound in a tubular configuration to constitute two consecutive layers. In the tubular configuration, the other end of each of the two sheets overlaps the sheet itself and welded to the latter straddling a coupling portion where the two sheets are joined. While one of the sheets which constitutes an inner layer of the tube is made of a material which is resistive to corrosion due to chemical reactions with combustion gas and others flowing through the tube, the other which constitutes an outer wall of the same is made of a material which withstands adverse ambient conditions such as briny air and high humidity.

Abstract: A tube of a muffler for an internal combustion engine includes at least two generally rectangular sheets which are jointed together at one end by crimping and wound in a tubular configuration to constitute two consecutive layers. In the tubular configuration, the other end of each of the two sheets overlaps the sheet itself and welded to the latter straddling a coupling portion where the two sheets are joined. While one of the sheets which constitutes an inner layer of the tube is made of a material which is resistive to corrosion due to chemical reactions with combustion gas and others flowing through the tube, the other which constitutes an outer wall of the same is made of a material which withstands adverse ambient conditions such as briny air and high himidity.

Abstract: A silencing device for an internal combustion engine includes an expansion chamber which may be implemented with a prechamber, a muffler or the like installed in an exhaust system of the engine. An exhaust pipe connected to the expansion chamber is provided with a double-layer structure consisting of an inner conduit through which exhaust gases flow and an outer conduit which surrounds the inner conduit. An air gap defined between the inner and outer conduits is opened into the expansion chamber at one end and closed at the other end so as to serve as a resonance chamber.

Abstract: A heat-resisting coating composition prepared by binding with a mixture of modified silicone resin and an aluminum chelate compound, pulverized inorganic material consisting essentially of a mixture of powder containing at least one member selected from the group consisting of aluminum phosphate, zinc molybdate and calcium carbonate, plate-shaped powder principally containing aluminum silicate or magnesium silicate, and metallic zinc powder. The composition exhibits excellent rust-preventing performance in a temperature range spreading from a low temperature to a high temperature, as a heat-resisting painting material for use on an exhaust pipe connected with a motor car engine. Upon applying said heat-resisting coating composition onto a metal surface, it is effective for enhancing adhesion to preliminarily form fine protrusions having "turn-rounds" on the metal surface.

Abstract: A muffler for use on an internal combustion engine includes an enclosure generally cylindrical and having end plates for closing the internal volume of the enclosure, at least one partition plate for dividing the internal volume of the enclosure into at least two chambers, an inlet tube, supported by one of said end plates and at least one partition plate, for conducting combustion gases supplied from the engine to one of the chambers; an outlet tube, supported by the other of the end plates and at least one partition plate, for blowing out the gases from remaining one of the chambers; and a connecting tube supported by said at least one partition plate for interconnecting the volume of adjacent ones of the chambers. At least two of the inlet, outlet and connecting tubes are integrally made of a single sheet of metal shaped to form a combination tube including the at least two tubes. A method of manufacturing such a combination tube is also provided.

Abstract: A heat-resisting coating composition prepared by binding with modified silicone resin added with an aluminium chelate compound, pulverized inorganic material principally including a mixture of powder containing one kind selected from a group consisting of aluminium phosphate, zinc molybdate and calcium carbonate or a mixture of them, cleaving scale-shaped powder principally containing aluminium silicate or magnesium silicate, and metallic zinc powder; reveals excellent rust-preventing performance in a temperature range spreading from a low temperature to a high temperature, as a heat-resisting painting material for use on an exhaust pipe connected with a motor car engine. Upon applying said heat-resisting coating composition onto a metal surface, it is effective for enhancing adhesion to preliminarily form a group of fine protrusions having "turn-rounds" on the metal surface.

Abstract: A muffler for use on an internal combustion engine includes an enclosure generally cylindrical and having end plates for closing the internal volume of the enclosure, at least one partition plate for dividing the internal volume of the enclosure into at least two chambers, an inlet tube, supported by one of said end plates and at least one partition plate, for conducting combustion gases supplied from the engine to one of the chambers; an outlet tube, supported by the other of the end plates and at least one partition plate, for blowing out the gases from remaining one of the chambers; and a connecting tube supported by said at least one partition plate for interconnecting the volume of adjacent ones of the chambers. At least two of the inlet, outlet and connecting tubes are integrally made of a single sheet of metal shaped to form a combination tube including the at least two tubes. A method of manufacturing such a combination tube is also provided.