E. C. H. Will Gmbh & Co.

E.c.h. Will Gmbh

Bernd Ramcke

Siegfried Lampe

Eckhard Brandt

Karl-Heinz Schlottke

Klaus Reissmann

Hartmut Peters

Gunther Stahl

Dieter Ladewig

A method and arrangement are provided for removing air inclusions between sheets in a stack when forming the stack from sheets fed successively by a sheet feeder to the stack to be formed and deposited thereon in a sheet feeding region. Air out is suction out of the spaces between the sheets in the sheet-feeding region.

Method and arrangement for removing air inclusions when forming stacks from sheets

One edge face of each stack of overlapping paper sheets in a series of moving stacks is trimmed and simultaneously roughened by a driven circular knife before the thus trimmed and roughened edge faces are coated with adhesive paste in a step which immediately follows the combined trimming and roughening operation. The edge faces are roughened by teeth which form the cutting edge of the circular knife and/or by particles of hard metal and/or boron nitride on that major surface of the knife which confronts the edge face of the stack at the combined trimming and roughening station.

Apparatus for bonding stacked sheets to one another

Self-sticking note pads are mass-produced in a continuous operation starting with a running web of paper which is drawn from a roll and one side of which is coated with longitudinally or transversely extending stripes of adhesive before the web is subdivided into a series of large panels which are gathered into stacks and overlapped by bottom covers prior to subdivision into pads of desired size. The stacks are preferably inverted prior to subdivision into pads so that the bottom covers are disposed below the lowermost panels of the corresponding stacks, and the subdivision of successive stacks into pads takes place in two immediately following stages. The pads are transported to a packing machine.

Method of and apparatus for making self sticking note pads

Adhesive coated front edge faces of successive stacks of paper sheets are bonded to downwardly folded marginal portions of flap-over covers at an aligning station which receives stacks from a first source along a first path wherein the stacks are caused to advance at right angles to their adhesive-coated edge faces and which receives covers with adhesive-coated marginal portions from a second source. The covers move along a second path lengthwise of their marginal portions and in parallelism with the front edge faces of the stacks in the first path. Each stack which arrives at the aligning station is disposed behind the downwardly bent marginal portion of the corresponding cover and is thereupon moved with the cover through the nip of two rollers which apply external pressure to bond the marginal portion to the edge face of the corresponding stack. The thus obtained stationery products are thereupon introduced into the gap between two additional pressing members which apply pressure again to ensure reliable bonding of the marginal portion of each cover to the respective stack.

Apparatus for attaching flap-over covers to stacks of paper sheets or

Apparatus for back stripping stacks of paper sheets or the like has a transporting unit which advances suitably staggered stacks along a horizontal path toward, to and beyond a back stripping station. The apparatus further comprises a carrier for an endless suction conveyor which draws requisite lengths of a web of backing strip material from a source of supply and past an adhesive applicator which coats the exposed side of the web with adhesive before the foremost back strip is severed therefrom and is temporarily held by the suction conveyor for application to the selected edge face of the stack at the back stripping station. This is achieved by moving the carrier from below upwardly into the path of an oncoming stack if the edge face about to receive the back strip is the leading edge face of such stack. If the edge face to be provided with a back strip is the lateral edge face, the carrier is laterally adjacent to the path of movement of stacks and is pivotable toward and from the edge face of the stack at the back stripping station.

Apparatus for back stripping stacks of paper sheets or the like

An apparatus for transporting several files of spaced apart paper stacks has several neighboring transporting units, one for each file and each having a frame mounting front and rear shafts for three toothed pulleys cooperating with toothed belts whose outwardly extending lobes can advance and/or guide stacks during movement along the upper side of a platform. The lobes of the median belt in each frame are engaged by the front edge faces of the stacks, and the lobes of the outer belts in each frame engage the trailing edge faces of the stacks on the respective transporting unit. Two gears are rotatably mounted on each rear shaft to respectively drive a pulley for one of the outer belts and a pulley for the median belt in the respective transporting unit. Such gears mesh with second gears which are mounted in the respective frame, and with driver gears which are mounted on shafts receiving torque from a stepping motor. At least one of the frames is adjustable in the housing of the apparatus at right angles to the direction of transport of the stacks, and the axial length of the driver gears is such that these driver gears remain in mesh with the second gears of the one unit in each position of adjustment of the frame of the one unit with reference to the housing.

Apparatus for transporting paper stacks or the like

An apparatus for transporting several files of spaced-apart stacks of paper sheets has several transporting units, one for each file of stacks, and each such transporting unit has three endless toothed belts which are installed in a frame in parallel vertical planes and carry outwardly extending lobes. The lobes on the two outer belts of a unit engage the rear edge faces and the lobes on the median belt of each unit engage the front edge faces of stacks in the respective files. Each belt is trained over two toothed pulleys and one pulley of each outer belt is driven by a first shaft whereas one pulley of each centrally located belt is driven by a second shaft. The second shaft is driven directly by a stepping motor, and the first shaft is driven by the stepping motor through the medium of a transmission which alternately increases and reduces the speed of the first shaft relative to the second shaft so that the lobes on the outer belts of each unit move away from the lobes of the centrally located belts, while the respective transporting units are in the process of receiving fresh stacks or discharging stacks, to thus ensure that the lobes cannot deface or otherwise damage the sheets of the stacks and that the stacks can be properly transferred onto the respective transporting units even if they are not delivered thereto at regular intervals.

Apparatus for intermittently transporting stacks of paper sheets or the

A machine wherein the sheets are held together by adhesive has an indexible turret with radially extending equidistant pockets for reception of stacks of sheets from a feeding device. The pockets transport the stacks past an aligning device, thereupon past an adhesive applying device which coats one edge face of each stack with a layer of adhesive, past a strip applicator which attaches a flexible strip to each adhesive-coated edge face, thereupon past a strip folder which converts each strip into a U-shaped body, and finally to a removing device which removes the thus formed pads from the pockets and transports them in a direction which at least substantially coincides with the direction of delivery of stacks to the pockets. The turret is indexible by steps each of which is a multiple of the distance between the centers of the inlets of two neighboring pockets, and the distance between the feeding and removing device is such that the removing device is bypassed at least once by the stacks and pads in the pockets of the turret to thus ensure that the adhesive can set prior to removal of the pads from their pockets.

Machine for making ruled pads or the like

Apparatus for trimming the lateral marginal portions of successive stacks of sheets of multiple unit width and for subdividing the trimmed stacks into stacks of unit width has an advancing unit which moves the stacks stepwise in a direction at right angles to their width, a trimming station where the marginal portions of successive stacks are trimmed, and two or more severing stations which are disposed one after the other, as considered in the direction of advancement of the stacks, and at each of which the width of the stacks is reduced by one unit width as a result of separation of discrete stacks of unit width therefrom. The stacks at the severing stations are moved sideways by the width of a stack of unit width prior to a separating step. The mechanisms at the severing stations employ knives which are aligned with one another, as considered in the direction of advancement of stacks, and are accessible at the outer sides of the respective severing stations.

Apparatus for cutting and trimming paper sheets or the like

An arrangement for forming successive layers of sheets of paper and the like from a stream of individual sheets supplied in succession to a collecting station by a supply conveyor, and for transferring the formed layers to a continuously advancing discharge conveyor, includes an abutment capable of interrupting the advancement of the supplied sheets to form a layer from a predetermined number of sheets, and a clamping device which grips the layer of sheets and transfers the same to the discharge conveyor. The arrangement includes a drive including a transmission, particularly a kinematic linkage transmission, causing the abutment and clamping device to perform a preselected succession of movements, and a prime mover which is kinematically separated from the main drive of the machine in which the arrangement is used and thus from the drive of the supply and discharge conveyors. The speed, acceleration and deceleration of the separate motor are controlled by a control arrangement which ascertains the delivery of a preselected number of sheets to the collecting station and thus the formation of a layer containing the predetermined number of sheets and causes the arrangement to perform its operating cycle while the formation of the next-following layer takes place at the collecting station.

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Hamburg, Germany

Bernd Ramcke