Abstract: The invention relates to a closure for an electrochemical reaction vessel, in particular a potentiostat, the closure comprising: a holder for holding electrodes arranged at an inner side of the closure such that, when the closure is attached to a reaction vessel, electrodes held by the holder extend into an interior space of the reaction vessel and into an electrolyte contained in the reaction vessel; and a plurality of contacts arranged at an outer side of the closure for providing electrical contacts with the electrodes.

Abstract: The invention relates to improvements in the technical field of flow reactors. To this end, a flow reactor which has a pressure connector is inter alia proposed. An internal volume of the flow reactor is able to be impinged with pressure by way of the pressure connector in order for a flow through the flow reactor to be generated. Compressed air and/or an inert gas such as, for example, nitrogen and/or argon, is preferably used to this end.

Abstract: A method and an apparatus for the thread-stitching of folded signatures, for which individual folded signatures which are successively lined up along their flat sides are sewn together with at least one sewing needle and at least one hook needle to form a book block. Prior to penetrating the fold of the signature to be sewn from the inside to the outside and before penetrating the eyelet of the previously sewn signature, the hook needle is rotated in such a way around its longitudinal axis that its hook is positioned in a vertical symmetry axis of the eyelet, on a side of the hook needle that faces the previously sewn signature. The hook needle can be rotated for this at an optional angle (?) around its longitudinal axis and the hook can be positioned at an optional rotational position.

Abstract: The invention relates to a closure for an electrochemical reaction vessel, in particular a potentiostat, the closure comprising: a holder for holding electrodes arranged at an inner side of the closure such that, when the closure is attached to a reaction vessel, electrodes held by the holder extend into an interior space of the reaction vessel and into an electrolyte contained in the reaction vessel; and a plurality of contacts arranged at an outer side of the closure for providing electrical contacts with the electrodes.

Abstract: The invention relates to a closure for an electrochemical reaction vessel, in particular a potentiostat, the closure comprising: a holder for holding electrodes arranged at an inner side of the closure such that, when the closure is attached to a reaction vessel, electrodes held by the holder extend into an interior space of the reaction vessel and into an electrolyte contained in the reaction vessel; and a plurality of contacts arranged at an outer side of the closure for providing electrical contacts with the electrodes.

Abstract: A method for operating a thread sewing machine to process printed sheets to form book blocks includes transporting the printed sheets lying astride a first transport section of a transport system. The first transport section is operated by a conveying mechanism. The conveying mechanism is operated with a speed change that depends on a direct sequence of different sheet lengths of the printed sheets. The printed sheets are fed from the first transport section to a second transport section of the transport system. The second transport section is operated by a conveying device having at least one of a controller and an operative connection to a stop so as to ensure an individual positioning of a sub-format printed sheet relative to a standard-format printed sheet. The printed sheets are fed from the second transport system to a downstream sewing station.

Abstract: A method and an apparatus for the thread-stitching of folded signatures, for which individual folded signatures which are successively lined up along their flat sides are sewn together with at least one sewing needle and at least one hook needle to form a book block. Prior to penetrating the fold of the signature to be sewn from the inside to the outside and before penetrating the eyelet of the previously sewn signature, the hook needle is rotated in such a way around its longitudinal axis that its hook is positioned in a vertical symmetry axis of the eyelet, on a side of the hook needle that faces the previously sewn signature. The hook needle can be rotated for this at an optional angle (a) around its longitudinal axis and the hook can be positioned at an optional rotational position.

Abstract: The invention relates to a closure for an electrochemical reaction vessel, in particular a potentiostat, the closure comprising: a holder for holding electrodes arranged at an inner side of the closure such that, when the closure is attached to a reaction vessel, electrodes held by the holder extend into an interior space of the reaction vessel and into an electrolyte contained in the reaction vessel; and a plurality of contacts arranged at an outer side of the closure for providing electrical contacts with the electrodes.

Abstract: A magnetic stirrer (1) has a housing (2) for accommodating a drive (3) and a holder or mounting plate (5) for a stirred vessel and a stirring magnet. A plurality of mounting feet (6) are provided for mounting the magnetic stirrer (1) on the base, which mounting feet are mounted in a movable or flexible manner and are connected to a weight measuring device or sensors belonging to a weight measuring device, with the result that the weight of the stirred material or a change in weight can be determined at any time without complicated additional weighing operations.

Abstract: A thread stitching machine to process signatures into book blocks includes a transport system for the signatures including a transport section on which the signatures are straddling for supply to a stitching station. The transport section includes an auxiliary saddle and a driven, continuously moving conveying chain to drive the auxiliary saddle. The conveying chain has spaced-apart, integrated pusher elements. A downstream installed stitching station includes a freely moving stitching saddle immediately following the auxiliary saddle. The stitching saddle includes a separate conveying device for the signatures, operated by a drive. A detection device is arranged at a transition between the auxiliary saddle and the stitching saddle to detect a position of the signature and a time which the signature passes by. The conveying chain is operated with a change in speed that depends on different sheet lengths following each other directly in a sequence of signatures.

Abstract: A method for operating a thread sewing machine to process printed sheets to form book blocks includes transporting the printed sheets lying astride a first transport section of a transport system. The first transport section is operated by a conveying mechanism. The conveying mechanism is operated with a speed change that depends on a direct sequence of different sheet lengths of the printed sheets. The printed sheets are fed from the first transport section to a second transport section of the transport system. The second transport section is operated by a conveying device having at least one of a controller and an operative connection to a stop so as to ensure an individual positioning of a sub-format printed sheet relative to a standard-format printed sheet. The printed sheets are fed from the second transport system to a downstream sewing station.

Abstract: A thread stitching machine to process signatures into book blocks includes a transport system for the signatures including a transport section on which the signatures are straddling for supply to a stitching station. The transport section includes an auxiliary saddle and a driven, continuously moving conveying chain to drive the auxiliary saddle. The conveying chain has spaced-apart, integrated pusher elements. A downstream installed stitching station includes a freely moving stitching saddle immediately following the auxiliary saddle. The stitching saddle includes a separate conveying device for the signatures, operated by a drive. A detection device is arranged at a transition between the auxiliary saddle and the stitching saddle to detect a position of the signature and a time which the signature passes by. The conveying chain is operated with a change in speed that depends on different sheet lengths following each other directly in a sequence of signatures.

Abstract: A magnetic stirrer (1) has a housing (2) for accommodating a drive (3) and a holder or mounting plate (5) for a stirred vessel and a stirring magnet. A plurality of mounting feet (6) are provided for mounting the magnetic stirrer (1) on the base, which mounting feet are mounted in a movable or flexible manner and are connected to a weight measuring device or sensors belonging to a weight measuring device, with the result that the weight of the stirred material or a change in weight can be determined at any time without complicated additional weighing operations.