Abstract: A cross table for a woodworking machine, such as a sliding table saw, and to a woodworking machine having such a cross table. The cross table includes a horizontally lying first workpiece support surface, a stop rail arranged above the first workpiece support surface and having a first workpiece stop surface on a first side of the stop rail, which is arranged such that a workpiece resting on the first workpiece support surface horizontally in front of the stop rail can be placed with a side edge against the workpiece stop surface. The stop rail has a second workpiece stop surface on a second side of the stop rail opposite the first side, the second workpiece stop surface arranged such that a workpiece resting on the first workpiece support surface horizontally behind the stop rail can be placed with a side edge against the workpiece stop surface.

Abstract: A safety device for machine tools, such as a panel-sizing circular saw or an edge-gluing machine, with a machining tool used for machining a workpiece supplied to the machine tool, comprises a detection device and a hazard reduction device. The detection device is designed to detect a hazardous situation of an operator of the machine tool and the hazard reduction device is designed to initiate a safety measure to reduce the risk of injury to the operator when a hazard signal characterizing a hazardous situation of the operator is received.

Abstract: A safety device for machine tools, such as a panel-sizing circular saw or an edge-gluing machine, with a machining tool used for machining a workpiece supplied to the machine tool, comprises a detection device and a hazard reduction device. The detection device is designed to detect a hazardous situation of an operator of the machine tool and the hazard reduction device is designed to initiate a safety measure to reduce the risk of injury to the operator when a hazard signal characterizing a hazardous situation of the operator is received.

Abstract: A micro gas turbine system (16) having an annular recuperator (24). The recuperator (24) serves to transfer heat from an exhaust stream (27) of the turbine (17) to an air stream (23) compressed by a compressor (19). Passages (1) for the exhaust stream (27) and passages (2) for the air stream (23) are arranged in alternation to each other in the recuperator (24). Adjacent passages (1, 2) are separated from each other by at least one wall (15). A filler (5) is arranged in the passages (1, 2) of at least one fluid stream.

Abstract: A micro gas turbine system (1) having an annular recuperator (9) for heat transfer from an exhaust gas flow (13) to an intake air flow (8). The exhaust gas flow (13) flows through radial inlets (18) into the recuperator (9) and/or out of the recuperator (9) through radial outlets (19).

Abstract: For the purpose of delivering, in the lying-flat condition, book blocks or books which are fed in, standing on their back or on the front cut and at defined timing intervals along their height, from a preceding machine in a transport path, provision is made, according to the method, for the books to be picked up, in accordance with the timing, in the transport path, swung out transversely to the direction of infeed and transferred into a defined delivery position which is spaced apart from the transport path, and is essentially a lying-flat position and from which said books can be fed to subsequent machines synchronously with the timing.

Abstract: For the purpose of delivering, in the lying-flat condition, book blocks or books which are fed in, standing on their back or on the front cut and at defined timing intervals along their height, from a preceding machine in a transport path, provision is made, according to the method, for the books to be picked up, in accordance with the timing, in the transport path, swung out transversely to the direction of infeed and transferred into a defined delivery position which is spaced apart from the transport path, and is essentially a lying-flat position and from which said books can be fed to subsequent machines synchronously with the timing.

Abstract: A device for machine backing of rounded book blocks (3), which are clamped in the area close to the spine, by means of a forming block (4) having a concave working face which acts with compressive force on the book block spine (3a), comprises a carriage (5) holding the forming block (4), which carriage (5) is swivellable on arcuate tracks (6a) in a supporting bearing (6) alternately to one side of the book block spine (3a) and the other by means of drive means (18), and comprises means (13-15) for cyclical upward and downward movement of the forming block (4) and a device (16, 17, 19-22) for adjusting the placement height position (HA) of the forming block (4) on the book block spine (3a). A measuring device (36-38, 53) which detects the height position (HRx) of the book block spine (3a) during continuous operation and a device (30, 31, 33, 43-50, 16, 17, 19-22, 51, 52) which positions the book block (3) to be backed and the forming block (4) to be placed thereon with respect to one another are provided.

Abstract: A method of manufacturing a book block with a rounded or a rounded and pressed back includes adhering a first plurality of narrow retaining strips along outer leaves and back of the book block. Additional retaining strips may be applied transversely across the back of the book block in the region of the top and bottom of the back of the book block. Thereafter, the book block may be rounded or rounded and pressed. It is believed that application of the retaining strips prior to the rounding and pressing operations reduces the forces of resistance in the rounding and pressing operations.

Abstract: Wrapping apparatus for use in the production of book covers employs wrapping systems for folding an overlay sheet around the leading and trailing edges of a cover board and subsequently clamping the folded-over overlay and cover board together for a defined period of time. The wrapping systems each comprise a tiltably mounted wrapping rail, controlled in a displacement-dependent mode, which cooperates with an associated support rail to form a clamp.

Abstract: A bottom closure for a chemical reactor having a cylinder extension whose attachment opening is closed by a closing part with said closing part bearing upon the conical counter-surface of the attachment opening and protruding a sufficient distance into the interior of the reactor that solid bridges or arches formed from solid material within the reactor are destroyed during the opening of the closure.