Abstract: The invention enables to pressure-bond a carcass ply sheet pasted onto a rubber laminating member wound around a periphery of a building drum firmly along a recessed and projected shape of the rubber laminating member without producing a deformation or a warp of a carcass cord, by using a stitcher apparatus constituted by arranging a plurality of pressure-bond rollers having axis centers in a tangential direction of a concentric circle having a diameter larger than that of a building drum in a peripheral direction by a plurality of rows and by a constant pitch by being respectively supported to be able to progressively displace to an inner side in a diameter direction, while moving the building drum in an axial direction relative to the pressure-bond rollers on an inner side of a circular arrangement of the pressure-bond rollers, a carcass ply sheet is pressed by a predetermined pressure to pressure-bond over an entire periphery and simultaneously by the respective pressure-bond rollers progressively displace

Abstract: Microporous material comprising water insoluble thermoplastic organic polymer and particulate amorphous precipitated silica not only exhibits low particulate emissions during handling and use, but also has a low extactable alkali metal content. Microporous material having these characteristics is especially useful in clean rooms where electronic devices such as integrated circuits are manufactured. Such microporous material may be produced by employing amorphous precipitated silica particles having low alkali metal content as all or a substantial proportion of the amorphous precipitated silica particles constituting the microporous material.

Abstract: A device (10) for splicing materials such as a strip of uncured tire tread stock (11) by ultrasonic joining includes two engagement cylinders (52, 72) driving two ultrasonic transducers (40, 60) having horns (43, 63) into selective, pressure engagement with the tire tread stock (11) at the top edge (15) of the splice joint, sealing the same. A screw (81) having right-handed threads (84) and opposite, left-handed threads (85) moves horns (43, 63) from their initial point of contact at opposite tire tread edges toward centerline (16) of tire tread stock (11) while horns (43, 63) deliver ultrasonic energy to top edge (15). As transducers (40, 60) near centerline (16), transducer (40) is withdrawn and transducer (60) continues thereacross, insuring a complete seal across the entire splice joint. A quality seal is obtained by selection of transducer (40, 60) frequency, control of transducer (40, 60) amplitude, and control of the pressure and speed of the transverse motion of horns (43, 63).