Abstract: A box blade attachment for tractors and like vehicles comprises a box frame which supports, for pivotal movement, a pair of moldboards, horizontally spaced from each other for scraping a surface in either a forward or backward path. Each of the moldboards moves independently of the other between a first position depending vertically between the sidewalls of the frame, and a second position pivoted inwardly and upwardly to lie in a plane substantially parallel to the surface being scraped. Hydraulic moldboard controls in the preferred embodiment synchronize the movement such that the moldboards move, alternatively and relative to each other, between the first and second positions. Thus arranged the box blade can be used in a conventional manner when the vehicle is moving in either direction by raising the appropriate moldboard and lowering the other.

Abstract: Device for bringing into register a tool mounted on a rotary cylinder for processing products in sheet form, such as a tool for cutting out, creasing, or printing sheets of cardboard in a machine for making and printing corrugated cardboard boxes, comprising a coder (22) providing information representing the theoretical advance of the sheets (10, 11), a coder (23) providing information representing the angle of adjustment given to the tool holder (1), a detector (20) of the passage of a reference mark (15) on the sheet (11) to a point situated upstream of the tool holder, a detector (36) of the theoretical passage of this reference mark at a selected distance slightly downstream of the first detector (20), and a computer (33) supplying correction commands to the correction motor (8) of the tool holder in order that the tool will arrive in phase with the incident sheet (11).

Abstract: Sheet-folding machine, especially for packaging cases made of corrugated cardboard, after they have been produced and printed.It incorporates advancing (10) and folding (22) belts which are maintained at the exact cycle of the machine by means of pulleys (14) provided with recentering fingers (15). The conveyor belts are provided with suction elements (19), and the folding belts are provided with push-studs (25) arranged to correspond to the turned-down portions (5) to be folded.

Abstract: An apparatus for the automatic supply of the magazine of the feeder on a slotter/printer with a high production rate for making cases consisting of corrugated cardboard, comprising a device (3, 10, 4) intended for separating a bundle from the top of a stack of blanks (14) by placing this bundle upright on its edge, a retractable device (4) intended for causing the virtually vertical drop of this bundle, and a guide and receiving device (5, 7) making it possible to stop the bundle, still standing on its edge, a device (6) for squaring the bundle laterally after its drop, a device (27, 7, 8) for raising the bundle to a horizontal position, and a device (9) for receiving and discharging this bundle.

Abstract: A process for producing a strip (4) of corrugated cardboard by gluing one or more sheets (8, 10) of single-face corrugated cardboard and a sheet (6) of covering paper.At least the corrugations of the upper sheet (10) are heated by means of an infra-red radiation panel (40), after the glue has been deposited on them in the gluer (1) and before the sheets come in contact with one another in the double-face machine (2).

Abstract: Device permitting the instantaneous changing of the width of application of glue to a web of paper in the manufacture of corrugated cardboard, the glue being applied to the web with the aid of a gluing cylinder (5) driven rotationally and dipping into a tank of glue over a width adjusted by two barriers which are movable in the tank. It includes a detachable auxiliary doctor device (1) comprising two doctors (2) to be applied momentarily to the two longitudinal ends of the gluing cylinder (5), on the non-immersed top part of the latter, the said doctor device being in addition equipped with a device for adjusting the distance (L3) left free for the passage of the glue between the two doctors.

Abstract: Feeder with a movable suction box, intended more particularly for equipping a magazine supplying sheets to a machine for making cases consisting of corrugated cardboard. The suction plate (10) of its suction box (6) is surrounded by a frame (17) made of flexible material, the assembly being designed in such a way so as to form a suction cup with flexible edges (26).

Abstract: Cardboard box forming and printing machine on which it is possible to effect a change of block on the printers without loss of time detrimental to the output of the machine. The printing modules of the machine are equipped to enable lateral translation either of the block-holder cylinder alone, or of the unit constituted by the block-holder cylinder and its inking device, as well as retractable means for propelling the cardboard which can be positioned when the block-holder cylinder is retracted laterally so as to continue to ensure the operation of advancing the cardboard provided by the latter before its lateral retraction.

Abstract: In a single-face corrugator of the type in which the corrugated paper is held by suction against the lower corrugated cylinder, the latter includes, outside its inner chamber filled with saturated heating vapor, separate longitudinal channels in the peripheral body of the cylinder. Each channel is connected to the exterior via axial channels and elongate grooves machined in the periphery of the cylinder, and can be connected to a suction apparatus via two hollow and sealed circular arcuate sectors bearing on the part of the face of the cylinder associated with the holding region on the latter. The grooves are staggered and machined in circumferential portions of the periphery of the cylinder so as to extend over several corrugations thereof. An additional blowing sector permits detachment of the corrugated paper.

Abstract: A method of employment of automatic lengthwise receivers which equip continuously operating corrugators. In accordance with the invention the course of the last panel of a first form and size is followed from its arrival upon the receiver, and a change of stack is triggered when this last panel has left the final conveyor of the receiver. Furthermore any retraction of the telescopic device located downstream from first conveyor of the said receiver is stopped.

Abstract: In a machine for separating and discharging products in sheet form, in which the sheets are supplied by a conveyor and stacked in a stacking position defined by a stop abutment associated with the conveyor, each successive sheet being introduced under the preceding sheet in the stacking position, a roller is provided at the upstream lower edge of the stack, the roller having peripheral cogs and being arranged so that the upstream edge of the lowest sheet in the stack rests against it and is raised by rotation of the roller.

Abstract: In a device for the synchronized introduction of sheets into a treatment machine, e.g. a printer-slotter or cutter for processing corrugated cardboard sheets, in which a reciprocating pusher pushes forward the lowermost sheet of a stack in a magazine between two stops and into engagement with feed rollers, the stack rests on the upper run of a set of endless belts, which upper run extends over a suction box which is maintained continuously under suction during forward movement of the pusher, the belts are driven forwardly to facilitate movement of the lowermost sheet from the bottom of the stack, and belts being immobile during the return movement of the pusher.

Abstract: The ink return circuit of a flexographic printing machine, for receiving ink from the ends of the gutter formed by a stereo transfer roller and a pressure regulating roller, comprises, at each end of the rollers, a vertical deflecting spout for receiving ink from the gutter, each spout having three doctor blades comprising a first blade extending substantially along the line of centers of the rollers and inclined to form an overflow and two lateral blades extending perpendicular to the first blade and to the end faces of the rollers. The spouts are biased against the end faces of the rollers and form part of a set of interchangeable spouts.

Abstract: The inking and washing circuit of a flexographic printing machine includes a device comprising a fixed plate on which an immersion pump assembly is mounted with the pump below the plate, and lifting means for receiving a container of ink or for washing purposes and for lifting the container up to a position against the underside of the plate in which the pump is within the container. Washing nozzle means are mounted on the underside of the plate along a closed shape surrounding the pump assembly, which shape is within the open mouth of the washing container but outside the open mouth of the ink container.

Abstract: A device for stacking sheets from the output of a machine for producing sheets, the device comprising a conveyor system feeding the sheets to a stack forming station, the conveyor system comprising first and second conveyors of which the first conveyor has a telescopic discharge portion which is retracted relative to the second conveyor during the period in which a formed stack is discharged from the stack forming station, to lay sheets on the second conveyor. The second conveyor moves at a reduced or zero linear speed while the speed of the first conveyor remains unchanged.

Abstract: A rotary self-sharpening knife comprises two identical half-knives each having a cutting edge on one face, the half knives being arranged with at least part of the peripheries of their other faces in contact, and means for urging the half knives together. In use the half knives are driven at different angular speeds so that there is slight relative movement of the half knives which produces a rubbing action between the peripheries of the half knives to maintain the cutting edges of the half knives sharp. The invention also relates to an assembly incorporating the inventive self-sharpening knife, and a machine for processing a product.

Abstract: An assembly for use in a machine for processing sheet or similar material comprising a rotatable tool and an opposing part between which the sheet material is fed and each mounted on a respective block and positionally adjustable relative thereto to vary the spacing between the tool and its opposing part, each block being movable in a direction transversely of the feed direction, and means for driving the tool and its opposing part each comprising a pinion supported on the block and meshing with a toothed shaft extending transversely of the direction of sheet material feed, wherein the toothed shafts are positioned so as to operate as feed rollers for feeding sheet material to the tool and its opposing part.

Abstract: In a cardboard blank folding machine for folding up the extreme transverse panels of a blank, e.g.