A multiple layer foam insert replacement for a pneumatic inner tube for a tire. The multiple layer foam insert emulates the effect of air pressure, across a range of pressures, while still approaching the weight of the air filled tube. Through the use of different density materials and the orientation and thickness of such materials, the desirable characteristics of the pneumatic tube structure and performance can be emulated to a high degree. This multiple layer foam insert can be produced in varying levels of quality and function through the method of extrusion of foam materials in different sizes and layering.

A multi-layer or multi-section foam insert replacement for a pneumatic inner tube emulates the effect of air pressure, across a wide range of temperatures and pressures, while maintaining the weight of a conventional air-filled pneumatic tube. Through the use of different density materials and/or the orientation and thickness of such materials, desirable handling properties are achieved. The multi-layer/multi-section foam insert can be produced by steam molding or extrusion of foam materials.

An apparatus and a method for stitching are provided. The apparatus includes a separator for separating in a separation position the leading end and the trailing end from a working surface to form a separation space, a stitcher unit with a stitcher foot to support the leading end and the trailing end from the separation space and a stitcher head for stitching the leading end and the trailing end on the stitcher foot from outside the separation space, a stitcher drive for driving the stitcher unit, a separator drive for retracting the separator, and a control unit to control the separator drive and the stitcher drive simultaneously such that, during the stitching, the separator is retracted in the stitching direction ahead of the stitcher unit.

A multi-layer or multi-element foam insert for a pneumatic inner tube emulating the effect of air pressure, across a wide range of temperatures and pressures, while maintaining the weight of a conventional air-tilled pneumatic tube. By combining materials of different density and/or the orientation and thickness of such materials, favorable handling properties are achieved.

A self-healing pneumatic tire, which uses the sealant stored in the tire to fix a leak, is disclosed.

This disclosure relates to a film for a tire inner liner film that may exhibit uniform excellent physical properties over all directions when applied to a tire, and may secure excellent durability and fatigue resistance in a tire manufacturing process or in an automobile running process, a method for manufacturing the film for a tire inner liner, a pneumatic tire using the tire inner liner film, and a method for manufacturing the pneumatic tire using the tire inner liner film.

A multi-layer or multi-section foam insert replacement for a pneumatic inner tube emulates the effect of air pressure, across a wide range of temperatures and pressures, while maintaining the weight of a conventional air-filled pneumatic tube. Through the use of different density materials and/or the orientation and thickness of such materials, desirable handling properties are achieved. The multi-layer/multi-section foam insert can be produced by steam molding or extrusion of foam materials.

A molded liner member for a fluid pump is disclosed. The liner member includes a generally annular ring, having an inner surface, an outer surface which is substantially concentric with the inner surface, and first and second end surfaces. The annular ring is molded from fiber reinforced polymer, and a majority of the fiber reinforcements in the polymer are oriented substantially parallel to an axis passing through the center of the annular ring. A method for making the liner member is also disclosed.

The present invention relates to: a method for manufacturing a polymer film, the method including a base film forming step for co-extruding a first resin containing a polyamide-based resin and a second resin containing a copolymer including polyamide-based segments and polyether-based segments; a co-extruded film including a base film including a first resin layer containing a polyamide-based resin, and a second resin layer containing a copolymer having polyamide-based segments and polyether-based segments; to a co-extruded film including a base film including a first resin layer and a second resin layer, which have different melting points; and to a method for manufacturing a polymer film, the method including a base film forming step including a step of co-extruding a first resin and a second resin, which have different melting points.

An apparatus and a method for stitching are provided. The apparatus includes a separator for separating in a separation position the leading end and the trailing end from a working surface to form a separation space, a stitcher unit with a stitcher foot to support the leading end and the trailing end from the separation space and a stitcher head for stitching the leading end and the trailing end on the stitcher foot from outside the separation space, a stitcher drive for driving the stitcher unit, a separator drive for retracting the separator, and a control unit to control the separator drive and the stitcher drive simultaneously such that, during the stitching, the separator is retracted in the stitching direction ahead of the stitcher unit.