Kochs Adler Ag

Heidelberger Druckmaschinen Ag

Kolbus Gmbh & Co. Kg

Durkopp Adler Aktiengesellschaft

Durkoppwerke Gmbh

Kolbus Gbmh & Co. Kg

Klaus Hampel

Wilfried Goldbecker

Reinhold Schrudde

Andreas Steinert

Frank Sommerer

Karl Nicolay

Rainer Lohe

Stephan Fritsch

Thorsten Holtmeier

Gunter Pries

An apparatus for pressing a cover onto a printing material block that is moved in a transport direction has a first pressing element that can be moved in a first direction and one or more second pressing element that can be moved transversely to the first direction. The first pressing element, in particular, is a pressing table moving in the vertical direction and the second pressing element one or two pressing rail(s) that can be moved in the horizontal direction. The apparatus has a drive unit, in particular with a servo motor, to which a variable control profile can be applied via a connection to a control unit. The variable control profile allows the movement of the pressing rails, for example their stroke or the course of their stroke, to be adapted to the current processing job. The apparatus is particularly suited for use in adhesive binders.

Apparatus and method for pressing a cover onto a moving printing material block

A device for a bookbinding machine for applying and pressing a cover ( ) on to an inner book ( ) which is continuously transported in feed direction (F) comprises a vertically-movable back pressing plate ( ) mounted on a support plate ( ) for pressing the cover ( ) on to the back, and comprises horizontally displaceable side pressing bars ( ) mounted in bearings on the support plate ( ) and controlled by an actuating arrangement for pressing against side faces adjacent to the back, the back pressing plate ( ) and the side pressing bars ( ) being able, in a cyclical reciprocating movement (H), to be advanced synchronously with the transported inner book while pressing against same and being guided at a distance from the back in the reverse movement. To limit the opening of the side pressing bars during the full reciprocating movement, it is provided in a simple construction that the actuating arrangement includes connecting rods ( ) which are pivoted at pivot points ( ) outside the reciprocating support plate ( ) and are pivotally connected by their other ends to the side pressing bars ( ) directly or via an intermediate transmission ( ) which moves with the support plate ( ), and that the outwardly-located pivot points ( ) are displaceable in a guided manner along the feed direction (F) of the inner book transporting system. In addition, the device makes it possible to set a particular opening width of the side pressing bars during the upward movement of the back pressing plate.

Arrangement for applying and pressing on covers

The bookbinding machine with a transport system for continuously conveying stacks of sheets at cyclical intervals having a jacket-laying-on device with a chain conveyer, and transporters which engage behind the jackets and feed them to the stacks of sheets in an aligned and synchronous manner. The movement of the transporters is controlled in such a way that they maintain their perpendicular position in the rerouting system after the feeding-in of the jackets.

Jacket-laying-on device for bookbinding machines

A thread tensioning device comprising a stationary electromagnet mounted on a sewing machine arm and a tensioning wheel having a relatively low mass. The tensioning wheel is rotatable concentric to a longitudinal axis of the electromagnet and is mounted on the electromagnet so as to be moveable only slightly in the direction of the longitudinal axis. A friction disk is positioned at one end of the electromagnet so as to be between the electromagnet and the tensioning wheel. A current flows through an excitation winding in the electromagnet and its value is varied within given limits by a suitable current control device, thereby causing the electromagnet to pull a flat side of the tensioning wheel with corresponding force against an application side of the friction disk, whereby a corresponding variable thread tensioning force is applied to a sewing thread passing through the tensioning wheel to the sewing machine.

Thread tensioning device having an electromagnet for applying a variable

A cutting device for an automatic sewing machine, including a knife (2) and a knife guard (3) which projects the fingers of the operator. The knife (2) is capable of being lowered to a cutting area in a cutting plane (S) only when the knife guard (3) is in its protecting position. The knife (2) and knife guard (3) are driven simultaneosuly by a single drive, the knife guard (3) reaching the cutting plane (S) earlier than the knife (2). If the knife guard (3) cannot substantially reach its protective position, then the downward movement of the knife (2) is mechanically blocked, preventing further movement of the knife (2). This mechanical blocking is carried out by the coaction of a lever (20) which is connected to the knife guard (3) by a connecting member (21), the lever (20) being moveable in translation and rotation, and by a lever (19), which is moveable rotationally only and has a stop (37) thereon for blocking movement of the knife (2) when the knife guard (3) is not in its protective position. The stop (37) is responsive both to the drive (5) and to the degree to which the knife guard (3) has been lowered.

Cutting device

A thread-chain separating head, in particular for a double chainstitch sewing machine, comprising a heating wire for thermically separating the thread chain and comprising a suction tube for leading the thread chain towards the heating wire. Said heating wire is arranged laterally and outside of the suction tube in order to achieve advantageous conditions during the heating and separating operation.

Thread-chain separating head for a double chainstitch sewing machine

A double chain stitch sewing machine having a feeding device with a feed dog oscillatingly movable in and opposite to the feeding direction for producing a relative movement between a workpiece and the sewing machine. It has a needle reciprocatingly driven by a crank mechanism, at which the feeding mechanism also imparts synchronous jogging movements to the needle in order to generate a needle feed movement. The reciprocatingly and joggingly driven needle cooperates with a looper oscillatingly driven by a looper drive mechanism in parallel with the feeding direction. The looper drive mechanism is formed as a six-bar-linkage-mechanism provided at the input with a stationary pivot and at the output with a stationary pivot and provided with an intermediate pivot. The looper is oscillatingly swung at a relative high velocity from one extreme position to the other at an input motion with constant angular velocity and the looper is moved with a short period of dwell in that extreme position located in the feeding direction and moved with long period of dwell in that extreme position located oppositely to the feeding direction.

Chain stitch sewing machine

A device for controlling the looper thread of a double chainstitch sewing machine has a looper which can be oscillatingly driven in the sewing direction. A link mechanism is provided to drive the spreader, said link mechanism being designed as a six-bar linkage mechanism with a four-bar linkage and a secondary two-link group. The basic linkage and the two-link group are arranged in such a manner that two links are guided during a movement of the spreader in an extreme position in which it does not spread the looper thread. Thus a spreader movement is produced which is particularly adapted to the sewing process.

Device for controlling the looper thread of a double chainstitch sewing

A fabric feed for a sewing machine has a feed foot and a holddown foot that are vertically oppositely reciprocable between upper positions and lower fabric-engaging positions, and a continuously operating rotary drive with a rotating output whose rotary motion is transformed by an appropriate linkage into alternating reciprocation of the feed foot and the holddown foot. The feet are alternately engaged with and disengaged from fabric in the fabric-engaging position. On moving downwardly from their upper into their lower positions the feet are each first accelerated to a maximum speed reached when approximately midway between the upper and lower positions and thereafter are decelerated to an intermediate speed lying between zero and seven-tenths of the maximum speed reached when they attain the lower fabric-engaging position.

Growing community of inventors

Bielefeld, Germany

Klaus Hampel