Abstract: A device for punching blanks out of a flat sheet, in particular packaging blanks consisting of cardboard or corrugated cardboard, using a punching tool that is mounted in a carrier plate and projects beyond the plate in the form of a blade or cutting line, in addition to profiled strips, consisting of a material of limited flexibility, which flank the tool. A rail-type profiled channel consisting of a rigid material is located on the carrier plate, running parallel to the punching tool on each side of the longitudinal faces of the latter and one cross-sectional area of the profiled strip is inserted into the profiled channel in a positive fit. In addition, at least one lateral face of the cross-section of the profiled strip has a protuberant base.

Abstract: A die block assembly of the present invention includes an upper die (20), an unloading plate (40), a plurality of springs (60), and a plurality of spacer blocks (80). A plurality of receiving holes (30) is defined in the upper die, for receiving the springs. A plurality of rams (34) depends from the upper die, for stamping a workpiece (95). The unloading plate is movably connected under the upper die, and defines a plurality of through holes (42) for accommodating the corresponding rams therein. Each spacer block is a stepped cylinder which includes a base (82) and a protrusion (84) extending upwardly from the base. Each spring abuts the base of the corresponding spacer blocker. A height of each base is slightly greater than a maximize clearance between the upper die and the unloading plate. The spacer blocks prevent spring fragments produced in the stamping process from entering the clearance.

Abstract: A stripping device for die cutting machine comprising a female die 2 which has female holes 21 corresponding to a plurality of external wastes 111 or internal wastes 112 on the same straight line; a male die 3 which has male pins 31 corresponding to the female holes 21; and a lower plate receiving member 43 for housing a catching plate 411 having pin catching projections 412 corresponding to the male pins 31, and cutouts 413 corresponding to a product 1 or a product bridge 1A, the lower plate receiving member 43 having spring housing holes 415 for housing springs 4153 to vertically move the catching plate 411.

Abstract: A die block assembly of the present invention includes an upper die (20), an unloading plate (40), a plurality of springs (60), and a plurality of spacer blocks (80). A plurality of receiving holes (30) is defined in the upper die, for receiving the springs. A plurality of rams (34) depends from the upper die, for stamping a workpiece (95). The unloading plate is movably connected under the upper die, and defines a plurality of through holes (42) for accommodating the corresponding rams therein. Each spacer block is a stepped cylinder which includes a base (82) and a protrusion (84) extending upwardly from the base. Each spring abuts the base of the corresponding spacer blocker. A height of each base is slightly greater than a maximize clearance between the upper die and the unloading plate. The spacer blocks prevent spring fragments produced in the stamping process from entering the clearance.

Abstract: A paper slitting device having first and second pivotally mounted platens with an integral biasing spring between them. The spring is formed by a resilient member extending from the first platen toward the second platen. The resilient member has a free end that is received in slots provided in the second platen and forms a bearing for the first platen and bending about an axis when a force is applied to one of the platens sufficient to move the one platen towards the other platen. The resilient member then returning the one platen to an at rest position when the force is removed.

Abstract: A slitting equipment, piercing various patterns of ventilation slits in thin material, comprising a frame, a main cylinder, auxiliary cylinders, and a plate with knives. Upon an electric impulse from a bag-making machine, to which the present slitting equipment is attached, the auxiliary pneumatic cylinders press and stretch the thin material when the main pneumatic cylinder activates a plate, to which is attached a multitude of cutting knives, up and down the vertical plane. The sharp knives pierce and cut the stretched, thin film in the designed pattern. When the knives have disengaged from the material, the auxiliary cylinders release the film, and the latter is free to move horizontally, while restricted vertically by the top and bottom supports of the machine. As a result of this procedure, ventilation openings have been created simultaneously with the sealing and shaping processes carried on by the bag-making machine, without producing any waste material.

Abstract: A device for performing the continuous cutting of materials of any form and nature, provided they are stratified and not flexionally rigid. The device generally comprises: fixed and mobile support surfaces; a mobile cutting shear cooperating with a fixed cutting shear; a fixed blocking unit on the fixed support surface side of the cutting shears; a mobile blocking unit on the mobile support surface side of the cutting shears; an eccentric for driving mobile portions of the device, including the mobile cutting shear, the eccentric being synchronized with the fixed and mobile blocking units; and a link block and slide guide. Non-rigid, stratified materials thereby may be more easily cut in that the invention substantially reduces or eliminates the dragging effect of the material that typically occurs during the cutting process.

Abstract: A novel two part punch stripper (10) for use with punches (12) carried by a punch press (16). The novel two part urethane punch stripper of this invention includes generally cylindrical concentric tubular upper and lower parts (50 and 52). The lower part (52) is formed of a urethane of a conventional hardness for a punch stripper, the hardness being in the range of 80A to 100A (Shore). The tubular upper part (50) is formed of a urethane substantially harder than the lower part of the stripper, for example, in the range of 75D (Shore). The combined length of the upper and lower parts is greater than the length of the portion of the punch which extends below the punch retainer assembly (14) so that a proper preload can be achieved. The upper part and lower parts are bonded to each other by a suitable adhesive. Alternatively, they may be bonded to each other by sequentially casting in a common mold.

Abstract: A universal movable upper tool for a waste-stripping station situated within a machine designed for die-cutting sheet or web-like matter to be converted into packages includes a tool with a rectangular lower plate provided with apertures. Push-rods destined to push waste material through corresponding openings of a perforated upper plate forming a lower tool of the station are fitted against a lower side of the upper plate with the help of quick-fitting means situated on the upper plate's upper surface. Sponge rubber pressers are fitted against a lower side of the upper plate by means of strips affording an easily disengageable mechanical engagement such as hook and loop locking strips (such as VELCRO fasteners) or frictionally engaging locking devices (such as LEGO fasteners).

Abstract: A stripper apparatus retains a workpiece in position relative to a punch press apparatus during the punching operation without marking or damaging a contacted surface of the workpiece. The stripper device is an axially elongate, resiliently compressible sleeve with a through axial bore which freely passes over the punch permitting the punch to travel therethrough. The stripper device removably attaches to a coupler or coupling portion which is also used to attach the punch to a punch stem of the punch press apparatus. Removable attachment is achieved utilizing keyways formed in the coupling portion and matingly engagable keys integrally formed on a corresponding surface of the stripper device. Additionally, peripheral flanges are integrally formed on the stripper which mate with the outside surface of the coupling portion to provide greater retention of the stripper device on the coupler.

Abstract: The sacks bound into packs by straps are unbound during their travel towards a sack application device by cutting the strap or straps which bind them, making the cut in a portion of the strap or straps which has been spaced apart from the pack. The cut straps are removed from the unbound pack, which then reaches the sack application device. The arrangement comprises conveyors for conveying the bound sacks to a station for cutting and removing the strap or straps, and from this to a sack application device.

Abstract: A manually operable paper slitting device has upper and lower platens normally biased apart from one another. The upper platen has diagonally extending and spaced parallel slitting blades extending downwardly therefrom for cooperation with spaced complementary slots formed in the lower platen. A resilient and compressible paper hold down and stripper element extends downwardly from the upper platen in surrounding relationship to the spaced slitting blades. The spaced slitting blades have an inclined bottom cutting edge which first pierces and then permits slitting of the paper along the cooperating slots in the lower platen. The resilient and compressible paper hold down and stripper element holds the paper from moving during and after the slitting operation.

Abstract: A cheekstrip having an upper part and lower part fits into a knife box assembly that is intalled in the rotary cutting cylinder of the folder used on a roll fed printing press. The upper part is made from a hard material and is connected to the lower part, which is made from a soft material such as open-cell sponge rubber. A knife is inserted between flat surfaces of two cheekstrips. The soft material applies correct pressure to the upper part, which contacts the paper against an adjacent member and clamps it securely, to enable the knife to make a quiet, consistent, distortion-free severance.

Abstract: A replacement cheekstrip having an upper part and a lower part for fitting into a knife box assembly that is installed in the rotary cutting cylinder of the folder used on a roll fed printing press. The upper part is made from a hard solid material connected to the lower part which is made from a soft material. The soft material can be open cell sponge rubber. A knife is inserted between the flat surfaces of the replacement cheekstrips. The soft material applies correct tension to the upper part, hard solid material, which in turn contacts the paper, against an adjacent cutting member, and clamps it securely to enable the knife to make a quiet, consistent, distortion free, severance.

Abstract: A blade type wood splitter is described including a blade guarding housing that is movable along with the blade to engage a wood block prior to contact of the block by the cutting edge of the blade. The housing rests against the wood block as the blade is driven through and later is retracted with the blade following the splitting operation. The housing includes a peripheral wood engaging edge that substantially circumscribes the cutting edge of the blade and is normally spaced therefrom toward the platform on which the wood blocks are received. This edge may first engage the wood block as the blade is moved toward splitting contact with the block. The edge may therefore provide ample warning to an operator who has inadvertently placed fingers in the path of the blade by contacting the fingers before the blade descends to cause injury.

Abstract: A machine for cutting cardboard and similar articles comprises a stationary platen mounted on the machine frame and an oscillating movable platen pivoted thereon to receive sheets one at a time from a magazine, means for delivering the sheets from the magazine to the moving platen, means for giving an oscillating movement to the moving platen and pivoting it, into contact with its stationary platen, blades for cutting the sheet on the moving platen and suction means on a pivoted chassis for removing the cut sheets and transferring them to a horizontal delivery conveyor and a rotary brush for wiping the surface of the moving platen.