Abstract: An automatic lubricating device for a cutting head of a cutting machine. The lubricating device is assembled within the cutting head and includes a pressure cylinder for forcing lubricating oil through a passage to a sump from which the lubricating oil is forced through a jet onto the cutter device mechanism. The lubricating device can be operated just prior to cutting or just after a cutting procedure with the cutting blade in an up or a down position.

Abstract: In the apparatus for drawing down knitted fabrics, a fixed position roller, a pressure roller and a drive for the rollers are located below mountainously opposed needle heads. The contact pressure between the rollers is controlled by a pivot mechanism including a cam driven by a motor and a spring connected to the cam and also connected to a pivot arm supporting the pressure roller. Rotation of the cam controls the spring force exerted on the pivot arm by the spring and thus controls movement of the pivot arm to lessen or increase contact pressure between the rollers.

Abstract: In the valve casing according to the invention, a cylindrical elastic member is fitted to solidly coat a whole inner surface of the valve casing to form a passage, while performing a function as a seal ring for pipe lines and a function as a seat ring for a valve disc.

Abstract: This invention is intended to solve the problem that a valve casing for use in a butterfly valve formed by press working, which is advantageous from the standpoint of productivity, thickness and weight, has such as a serious disadvantage of breakage or deformation and lowering in the sealing performance due to release on aging or the seal ring when the valve is mounted on pipe line and clamped from both sides. From this point of view, a valve casing according to this invention is formed into a double structure composed of an inner shell and an outer shell, the inner shell comprising a cylindrical part defining a bore and seal ring receiving portions formed on both ends with their diameters enlarged larger than the cylindrical part substantially forming an S-shape in cross section, the outer shell defining a space by surrounding a whole outer periphery of the inner shell, and the inner shell and the outer shell being superposed to each other at both end of the valve casing.