Abstract: A large number of needle patterns are integrally associated with each other on an extended U-shaped metal plate. After that, a pointed end of individual needle patterns is formed, and a series of individual needle patterns are divided into a plurality of segmented needle bodies. Then, a suture is inserted into a hollow portion of the needle body. By closing both walls of the needle body, a suture needle can be produced one after another.

Abstract: A nut installation apparatus or head and controls for installing self-attaching nuts, such as pierce nuts, in a panel, without the requirement of a large forming die press assembly. The apparatus includes a nut anchor, which holds the first or end nut stationary, a relatively movable die member, opposite the nut anchor, which supports the panel and a resiliently supported nut guide having a passage receiving nuts in bulk or strip form. The panel is biased into contact with the end nut in the nut guide, by the movable die, to install the nut in a panel. The moveable die is impelled toward the nut anchor by means of a two stage piston assembly having a first stage which supplies pressure limited to the elastic limit of the panel, and a second stage which supplies sufficient pressure to pierce the panel with the end nut. A sensor and switching mechanism is integrated with the apparatus controls to assure proper installation of the nut and prevent damage to the apparatus.

Abstract: A method for securing mining machines, particularly longwall mining machines from sliding on inclined or steep seams in the event of a malfunction of a traction element or driving unit. The invention has particular application to longwall mining machines provided with at least two gearwheels which engage a rack extending along a working face whereby the mining machine may be advanced during a mining operation. The invention also relates to apparatus for automatically braking such a mining machine in the event of failure of a traction element.