Abstract: The invention relates to a method and device for the production of injection moulded parts, especially preforms, in an injection molding method. The raw material and the additives are fed to a plasticizing worm (4) which injects pressurized plastic melt into the cavities of an injection mould (7,8) and the injection molded parts are removed from the moulds after cooling has occurred. According to the invention, the additives, especially AA blockers or coloring, are added directly to the worm cylinder in liquid form in a dosed manner after the raw material has been inputted. The invention relates more specifically to the injection molding of preforms for the production of PET bottles. One advantage of the invention is that it enables the acetaldehyde content to be reduced by 50%, the dosing time can also be reduced significantly and said dosing can be stabilized in a significant manner.

Abstract: The conveyor system comprises a guide-way (2) with guide rails (4) and conveyor elements (1) with rollers (3), wherein the rollers (3) are assigned to guide rails (4) located opposite one another and/or conveyor elements (1) comprise rollers (3) with non-parallel axes and due to this the system can be loaded with forces oriented in the most differing directions. The rollers (3) in this conveyor system comprise a relatively hard running jacket (5) with a running surface, which is flat transverse to the conveying direction. The material of the running jacket is paired with the material of the guide rail for low friction and little wear. In addition, the rollers (3) comprise a relatively soft, elastically deformable damper ring (6) arranged between the running jacket (5) and the roller body (7) and the guide rails (4) of the guide-way (2) are supported on a dampening substrate at least at such points of the conveying track, at which load changes occur.

Abstract: The invention relates to a device for conveying flat objects (46), especially products of a printing works, which comprises successively arranged conveying elements that are moved along a continuous track (16) in a direction of conveyance (F). Individually controllable conveying clamps (22) are mounted on each conveying element (12) and are configured for laterally holding, with the clamp jaw thereof that is arranged in the plane of conveyance extending in the direction of conveyance (F), at least two objects (46), which are arranged in the plane of conveyance and in the direction of conveyance (F) while overlapping one another in an offset manner. The conveying clamps are mounted on the conveying elements in the plane of conveyance and in a direction of displacement (30), which is perpendicular to the continuous track (16), in a manner that permits them to be displaced to and fro between two positions (50, 50′).

Abstract: The invention relates to a device for conveying flat objects (46), especially products of a printing works, which comprises successively arranged conveying elements that are moved along a continuous track (16) in a direction of conveyance (F). Individually controllable conveying clamps (22) are mounted on each conveying element (12) and are configured for laterally holding, with the clamp jaw thereof that is arranged in the plane of conveyance extending in the direction of conveyance (F). at least two objects (46), which are arranged in the plane of conveyance and in the direction of conveyance (F) while overlapping one another in an offset manner. The conveying clamps are mounted on the conveying elements in the plane of conveyance and in a direction of displacement (30), which is perpendicular to the continuous track (16), in a manner that permits them to be displaced to and fro between two positions (50, 50′).

Abstract: Wires (D.4 to D.9) or objects similar 10 wires are fixed in predetermined positions by a device with pairs of clamping jaws (3.4/4.4 to 3.9/4.9). The device has at least two flat jaw elements (3, 4) lying against each other and being at least restrictedly slewable against each other around a center (M) and it further has holders (20). Each of the jaw elements (3, 4) has one clamping jaw (3.4 to 3.9, 4.4 to 4.9) for each one of a plurality of fixing points arranged on a circle (K.3) around the center (M) which clamping jaws are designed for exerting tangential clamping forces directed tangentially to the circle (K.3) on wires (D.4 to D.9) fixed in the fixing points. Hereby, clockwise clamping forces are exertable with the one jaw element and counter-clockwise clamping forces are exertable with the other jaw element. By slewing the jaw elements (3, 4) against each other the pairs of jaws are opened and closed.

Abstract: An article transport assembly which is particularly designed for the conveyance of articles such as printing products, and which comprises a guide rail, and a plurality of article transport devices mounted for movement along the guide rail. Each transport device comprises a U-shaped transport body having a base leg and the two upright side legs, and with a gripper for engaging a printing product attached to the base leg. The two side legs each mount a pair of guide rail engaging members, with the two pairs of guide rail engaging members being positioned to engage both sides of the guide rail at two longitudinally spaced apart locations, and so as to permit the guide rail engaging members to move along the guide rail essentially free of play.

Abstract: An arrangement has a rotor with rotor arms that are arranged in a drum-like manner around an axis of rotation and project on one side from a carrying element that is driven in rotation. The arrangement also has a sucker arrangement that includes a carrying arm which is driven by a drive. At a free end of the carrying arm there is arranged an extension arm with a suction head. The movement path of the suction head runs in the interior of the rotor, with the exception of an approximately V-shaped section of the movement path projecting in a radial direction outside the rotor. When the extension arm runs through this section, it passes through a cutout of the rotor in order to grip a corner region of a printed product and move the printed product into the interior of the rotor. A rotor arm then engages beneath the printed product and lifts it further in order to deliver it to a range of action of a removal conveyor.

Abstract: The transporting apparatus has a guide which forms a closed loop and in which transporting members circulate. The transporting members are driven at the beginning and end of the effective conveying zone by in each case an independently controllable drive mechanism. Between successive transporting members there are in each case spring elements, which are designed exclusively for the transfer of compressive force. The drive means of the drive mechanisms driving the transporting members are preceded by controlled blockers, by which the transporting members are prevented from being taken along by the drive. As a result it is ensured that each transporting member seizes a printing product, even if there are gaps in the printing products as they are fed to the transporting members, the printing products preferably being fed in imbricated formation. At the delivery point, the delivery of printing products may also be delayed by one or more cycles without stopping the drive.

Abstract: A gripper for conveying printed products is disclosed. The gripper has two gripper parts mounted so as to be pivotable on a shaft which, in turn, is mounted rotatably in a holder. Connected to this shaft so as to be fixed against rotation is closing lever which bears at its end a follower roller which interacts with fixed closing links or cams. Furthermore, a resting part for a compression spring is connected to the shaft via a spreader ring so as to be fixed against rotation. This compression spring is supported at its other end on a bearing part which is integral with the one gripper part. A pivot movement of the closing lever results in a corresponding clockwise pivoting of the resting part. As a result, pivoting of the one gripper part into the clamping position is brought about via the compression spring. This one gripper part is blocked in its clamping position in which the compression spring is compressed and exerts a corresponding clamping force.

Abstract: A gripper includes two gripper parts. The first gripper part is arranged pivotably relative to the other, second gripper part. The two gripper parts interact to securely hold a printed product at the free ends of the gripper parts. The first gripper part is mounted by a ball joint in a bearing part, which is seated unrotatably on a rotatably mounted hollow shaft. A compression spring is mounted in the first gripper part between the bearing part and the first gripper part, which is spherically mounted in the latter. The compression spring in the closed position of the bearing part exerts a compressive force on the first gripper part. The ball joint is offset rearwards with respect to the pivot axis of the bearing part. As a result, a rearward lengthening of the leg of the first gripper part is attained. This results in more favorable leverages and, with a given compression spring, accordingly results in higher clamping forces at the free end of the first gripper part.

Abstract: A gripper for use in a conveying device which conveys printed products is disclosed. The gripper has two gripper parts which are mounted so as to be freely pivotable on a shaft. The first gripper part can be pivoted between an open position and a clamping position. This purpose is served by a closing lever which is seated on the shaft so as to be fixed against rotation. The rotary movement of the shaft is transmitted via a resting part, which is connected to said shaft so as to be fixed against rotation, and a compression spring which is supported on the resting part and, at the other end, acts on the first gripper part. The closing lever supports a follower roller which is mounted so as to be freely rotatable and interacts with closing links or cams. A locking device is provided for locking the first gripper part in the clamping position.

Abstract: By means of a lever mechanism a suction head periodically connectable to a vacuum source is moved along a closed orbit between a pick-up point and a delivery point. At the pick-up point the suction head grips the respectively uppermost product in a stack and brings it to the delivery point, at which the product is released. The drive shaft of the lever mechanism is driven by a drive device at a varying speed in such a manner that the suction head is moved along its movement path at a speed which is minimal in the region of the pick-up point during the carrying along of a product immediately after it has been gripped, and then increases. Faultless gripping of the printing products is thereby achieved and the next printing product is prevented from being carried off with it by the action of suction.The drive device may be an intermediate or superimposition transmission unit which is driven at constant speed of rotation on by a drive motor and which for example is in the form of a rotating slider crank.

Abstract: A gripper for conveying printed products is disclosed. The gripper has two gripper parts mounted so as to be pivotable on a shaft which, in turn, is mounted rotatably in a holder. Connected to this shaft so as to be fixed against rotation is closing lever which bears at its end a follower roller which interacts with fixed closing links or cams. Furthermore, a resting part for a compression spring is connected to the shaft via a spreader ring so as to be fixed against rotation. This compression spring is supported at its other end on a bearing part which is integral with the one gripper part. A pivot movement of the closing lever results in a corresponding clockwise pivoting of the resting part. As a result, pivoting of the one gripper part into the clamping position is brought about via the compression spring. This one gripper part is blocked in its clamping position in which the compression spring is compressed and exerts a corresponding clamping force.

Abstract: To reduce the polygonal effect, the chain-turning system described in the present disclosure has at least one transition curve (UK11, UK12) that joins up with the circular turning arc (B.11) and the radius of curvature of the transition curve varies continually. This transition curve may join up with a straight portion of the chain's track (G.11, G.12) or with another turning arc. The transition curve may, for example, be a portion of a clothoid, whose radius of curvature at its junction (A.11, A.12) with the turning arc (B.11) is the same as the turning radius and at its junction (C.11, C.12) with the straight portion of the chain's track (G.11, G.12) is infinitely large.

Abstract: The ejecting arrangement has two ejecting wheels which are designed in saw-toothed form on their circumference. The ejecting wheels can be swiveled out of a position in which they are turned by half a tooth pitch with respect to each other into a position in which the stops of the two ejecting wheels are mutually aligned. If the ejecting wheels are offset with respect to each other by half a tooth pitch, each printing product inserted into a pocket of the paddle wheel runs onto a stop and is ejected by the latter from the pocket due to the different speeds of the paddle wheel and of the ejecting wheels and is deposited in imbricated formation onto the delivery conveyor. If, on the other hand, the stops of the two ejecting wheels are mutually aligned, the printing products of two successively occupied pockets in each case make contact with a stop, as a result of which the two printing products are ejected from the pockets mutually aligned with their fold.

Abstract: The hook and loop fastener comprises a first fastener portion provided with a fastener pile containing hooks or both hooks and loops. This first fastener portion is intended to cooperate with a second fastener portion provided with a fastener pile which contains loops or both hooks and loops. To protect each of the fastener piles of the fastener portions from being excessively loaded under compression each of the fastener portions is provided with at least one compression-resistant spacer or distance member arranged alongside the associated fastener pile. The thickness of each such spacer or distance member amounts to at most the height of the related fastener pile, preferably is however slightly less than such fastener pile height.

Abstract: The hook and loop fastener comprises a first fastener portion provided with a fastener pile containing hooks or both hooks and loops. This first fastener portion is intended to cooperate with a second fastener portion provided with a fastener pile which contains loops or both hooks and loops. To protect each of the fastener piles of the fastener portions from being excessively loaded under compression each of the fastener portions is provided with at least one compression-resistant spacer or distance member arranged alongside the associated fastener pile. The thickness of each such spacer or distance member amounts to at most the height of the related fastener pile, preferably is however slightly less than such fastener pile height.

Abstract: A rolling body with guide channel, in which a rolling element cage with rolling elements is arranged in the rolling body and the guide channel has rail members for the rolling of the rolling elements, is characterized in that the rolling body has a rolling element cage, in which in recesses are provided at least one preferably triplet of three rolling elements, in such a way that the centers of the rolling elements have the same reciprocal spacings and that in the guide channel for each rolling element of the triplet is provided a guide rail, the guide rails being so reciprocally positioned and spaced, that with the rolling body inserted therein the rolling elements of the triplet are in reciprocal contact and each is in contact with rail member. In the case of a purely suspended operation, a pair of two rolling element can be used in place of a triplet. However this is a special case for an operating form in which only tensile loads occur at right angles to the guide channel.

Abstract: In an imbricated formation delivered by an infeed device in each case two printed products lie in pairs upon one another and, viewed in a predetermined product conveying direction, bear upon the upstream or trailing printed product pair. A suction roll is arranged downstream of the infeed device which causes the current lower printed product to be downwardly bent in a direction transverse to a product conveying plane. The leading edges of the printed products are introduced in such separated or fanned apart condition into a respective gripper, engaged by such respective gripper and outfed in a further predetermined conveying direction. The spacing between neighboring grippers is minimal at a product take-over region, so that when the grippers are open in each instance a leading gripper finger of a trailing gripper bears against a trailing gripper finger of the neighboring leading gripper.

Abstract: Individually controllable gripper elements are successively spacedly arranged at a ball-and-socket joint-link chain revolvingly driven and guided in a guide channel. At the leading end region of an overhang member of each gripper element there is seated a clamping jaw and at the trailing end region there is arranged a bushing. A shaft is rotatably and displaceably mounted within the bushing. A clamping finger, coactable with the clamping jaw, is rigidly connected with the upper shaft end. At the lower shaft end there is seated a slide shoe and the lower end region of the shaft is encircled by a pivotable element rotatably connected with the shaft. A compression spring rigidly bears for rotation at the pivotable element and the overhang member. When the slide shoe travels onto a stationary cam the clamping finger is raised against the force of the compression spring. An actuation element, which acts upon a further slide shoe, rotates the clamping finger through an angle of about 90.degree..