Abstract:
A method for controlling a feeder of a gathering-stitching machine reduces the operating effort when setting the feeder, increases reliability when laying folded sheets on a transport device and improves quality during collating and stitching. Opening and closing times of grippers are regulated under program control, continuously and as a function of format when controlling the feeder of the gathering-stitching machine. Data relating to the dimensions and to the number of pages of the folded sheets is thus entered into a control device, from which data actuating signals for actuating elements of the grippers are generated.
Abstract:
A gatherer-stitcher has a folded-sheet feeder and an apparatus for transferring folded sheets from the feeder to a transporting configuration of the gatherer-stitcher. The apparatus has a plurality of shafts or drums with grippers for gripping the folded sheets. The apparatus opens the folded sheets and places them astride the transporting configuration. The apparatus also has a blowing configuration which, as a folded sheet is transferred from one shaft or drum to another, subjects the folded sheet to a surge of air in time with a folded-sheet transportation.
Abstract:
Signatures (1) are individually gripped from a stack (2) by a rotatable extracting cylinder (A) and transferred to a first rotating opening cylinder (B) and a second rotating opening cylinder (C) which open the gripped signatures (1) at the edges (4, 5) opposite from the fold (3) and drop the signatures onto the transport device (6). To open and transport the signatures (1) onward, the signatures (1) are gripped at their respective protruding edge (5) by a clamping device (48) disposed on the first opening cylinder (B). Projections are provided which catch behind the above-referenced edges (4, 5) in the extracting cylinder (A) and transfer the edges to the clamping device (48). These projections include a guide arm (7) which is movably supported on the first opening cylinder (B) and moves in response to a rotation of the first opening cylinder (B) from a retracted position into a position projecting over the circumference (27) of the first opening cylinder (B). This arrangement restrictedly guides the signatures and reliably transfers the signatures to the opening drum (B, C) even at high velocities.
Abstract:
A signature opening apparatus for receiving one signature at a time from a source of signatures fed to the apparatus in a steady stream. The apparatus includes an opening drum mounted for rotation on a shaft for delivering opened signatures to a continuous signature carrying chain. It utilizes at least one gripper assembly mounted for rotation with the opening drum for opening one signature at a time. The apparatus also includes a timing mechanism to allow the gripper assembly to initiate gripping of signatures at a first preselected point, to fully grip signatures at a second preselected point and to release signatures at a third preselected point. The gripper assembly includes an elongated countinuously curved finger having a first end mounted for rotation relative to the opening drum and a second end normally projecting beyond the opening drum. The apparatus also includes a seat as a part of the gripper assembly to be engaged by the second end of the finger. The gripper assembly is formed with the finger having a continuously curved inner surface and a continuously curved outer surface. It utilizes the timing mechanism to allow the finger to rotate from a position where the second end normally projects beyond the opening drum in spaced relation to the seat to a position where the second end cooperates with the seat to grip signatures therebetween. Additionally, the apparatus utilizes a mechanism for rotating the finger back to the position where the second end of the finger normally engages the seat.
Abstract:
A high speed signature inserter packer box to operate with a saddle stitcher at a rate in excess of 225 books per minute includes a very simple and rapid way to convert from operation with a feed hopper signature supply to operation with a stream feeder signature supply. The inserter packer box also has a novel arrangement for controlling the trailing end portion of a signature on the extracting drum in the area where it is grasped by the transfer drum grippers. A low volume, low velocity air stream blows through said area toward the transfer drum to deflect the trailing end portion into a recess in the transfer drum periphery that carries a set of grippers, and the recess is shaped to assure that the deflected trailing end portion is positioned to be grasped by the grippers.
Abstract:
Method in producing stapled printed matters. Signatures are laid astride one upon the other on a conveyor path (10) in a number of stations (12, 29, 34) distributed along the conveyor path. The signatures are transferred along the conveyor path at a rate which is brought to vary cyclically between a lower value while signatures are being received, and a higher value while signatures are being transferred between the stations.The signatures laid one upon the other are stapled and trimmed by operative movements allowing the signatures to be transferred continuously along the conveyor path while being stapled and trimmed.
Abstract:
An improved signature handling apparatus includes a movable gripper jaw which operates in conjunction with similar gripper mechanisms to clamp and spread the signature so that the laps fall on opposite sides of the saddle in a saddle gatherer. In order to assure that the pages on the opposite sides of the fold fall on the appropriate side of the saddle gatherer, a sensing means is utilized to detect whether all of the pages on one side of the signature are properly clamped by the gripper jaw. Since the position of the gripper jaw is indicative of whether the correct thickness has been clamped, the sensing means emits a positive response when the gripper jaw is in the correct position. The sensing means includes a part operatively associated with the gripper jaw which is adjusted by connecting means to be in a predetermined position when the gripper jaw properly clamps the signature leg. Depending on the embodiment, the operatively associated part has either a reflecting surface or an aperture, as means for sensing its position. The sensing means further includes a light source and light sensor whereby light is received into the light sensor after either being reflected from the reflecting surface or passing through the aperture depending on the embodiment, only when the operatively associated part is in the predetermined position. Upon receiving light from the light source, the light sensor emits an electrical impulse indicating that the signature lap has been properly clamped.
Abstract:
Rotatable transfer drum removes signatures by their folded edges one at a time from a hopper and presents them to a supporting plate with their open ends extending beyond one edge of the plate. The first of a pair of rotatable signature opener drums is arranged to take the open end of each signature lying on the plate in such a fashion that a fairly sharp bend is put in the open end, thus enabling easy signature opening when the outer side is released for taking by a vacuum gripper on a second opener drum. The first opener drum is provided with long gripper fingers, short gripper fingers, and one or more vacuum grippers, for handling different types of signatures having high and low folio laps or no lap at all. The gripper fingers are operated by stationary cams on one side of the first opener drum, and a vacuum line to the vacuum gripper is provided at the opposite side of the drum and is connected to the rotor of a timing valve. The cams are coaxial with the opener drum and are held fixed in position by means of a stationary bracket extending radially from a frame member to the cams. Tamper plates or paddles are provided to engage signatures on the plate to provide a temporary steadying support when the grippers initially take hold of the open ends of signatures.
Abstract:
A signature inserter for a signature gathering machine having two hoppers, arranged one above the other; two rotary extractor drums, each of which is associated with one hopper and provided with means for extracting individual signatures from that hopper; a rotary transfer drum for transferring individual signatures from one extractor drum to the conveyor and a rotary intermediate drum for transferring signatures from the other extractor drum to the first extractor drum. Finally, the signature inserter includes means for selecting the hopper from which the signatures will be extracted.
Abstract:
A FEEDER FOR SHEETS OR SIGNATURES, FEEDING FROM A SUPPLY HOPPER TO A CONVEYOR, IS CONSTRUCTED TO HAVE A SINGLE EXTRACTING CYLINDER OPERATING BETWEEN THE SUPPLY AND THE HOPPER, EFFECTIVE TO FEED TWO SHEETS PER CYCLE OF REVOLUTION. A SHEET RELEASED FROM THE EXTRACTING CYLINDER IS SETTLED ON THE CONVEYOR BY MEANS OF AN AIR BLAST. FURTHER, THE ARRANGEMENT MAKES POSSIBLE AN IMPROVED SYSTEM FOR DEMOGRAPHIC SIGNATURE GATHERING.