Abstract: A printing apparatus is able to perform partial cutting in which a portion of thermal paper remains uncut and full cutting in which the thermal paper is completely cut, and the printing apparatus includes a movable blade, a plate, and a driven gear. The plate includes a guide groove, the movable blade includes a guide shaft, the guide groove includes a first side and a second side, and the second side includes a certain portion extending in a direction away from the first side. When the driving gear rotates in a first rotational direction, the guide shaft changes a position with respect to the guide groove along the first side to perform the partial cutting, and when the driving gear rotates in a second rotational direction, the guide shaft changes the position with respect to the guide groove along the second side to perform the full cutting.

Abstract: A method for producing an expanded metal, the method including producing a sheet of the expanded sheet metal by introducing openings through one expansion blade wherein all the openings are configured as diamond shaped loops without a material loss and defined by a loop width, a loop length and a loop shape; and forming the diamond shaped loops respectively by four linear bars that are defined by a bar width and a bar thickness wherein two of the four linear bars are respectively connected at four nodes; arranging plural of the diamond shaped loops in columns adjacent to one another and in rows adjacent to one another; and forming first columns of first diamond shaped loops different from second columns of diamond shaped second loops in a loop width or in a loop length respectively measured from a node center to a node center.

Abstract: A fixed blade and a movable blade in which a cutting portion end face of the movable blade is orthogonal to a side surface of the movable blade, and the movable blade is brought into sliding contact with the fixed blade to cut a recording sheet. A cutout groove for forming a cutting residual portion in the recording sheet is formed in the cutting portion of the movable blade. A slant surface or a curved surface is formed at an intersection of the side surface of the movable blade, a cutting portion end face of the movable blade and the inner peripheral surface of the cutout groove.

Abstract: A punching die for punching out a seal member from a sheet of an inorganic fiber mat having a contour. The punching die includes a base plate. A first blade is supported on the base plate and has a cutting edge extending to form a loop. The first blade punches out a frame-shaped unnecessary portion, which includes the contour, and a seal member formation portion, which includes the seal member, from the inorganic fiber mat. A second blade, which is supported on the base plate at an outer side of the first blade, partially cuts the frame-shaped unnecessary portion. The at least one second blade forms a perforation in the frame-shaped unnecessary portion to separate the unnecessary portion into a plurality of unnecessary fragments. This improves productivity for production of the seal members.

Abstract: Expanded metal machine includes a stationary knife and an adjustable knife which is adjustable in a vertical direction and a transverse direction. The adjustable knife includes a cutting edge with spaced-apart cutting projections in the transverse direction. A transport device for transporting a flat material in a direction of transport between the knives is provided. A cam is provided and configured for performing a periodic vertical motion. There is a transverse adjustment device configured for adjusting the transverse motion of the adjustable knife in a manner synchronized with the traveling motion. Likewise, there is an eccentric drive provided for the cam, and that is configured for guiding the cam in a circulatory motion which runs in a plane determined (e.g., bounded) by the vertical direction and the transverse direction.

Abstract: A punch for attachment to a brace of a braced die has a hollow cutting nose with a leading end for cutting a material to be punched and a trailing end opposite the leading end. A shaft extends from the trailing end of the nose and is sized to pass through an aperture in a brace. An upper retainer is joined to the shaft and has an upper retaining surface adapted to abut an upper surface of a brace. A lower retainer is joined to the shaft and has a lower retaining surface adapted to abut a lower surface of a brace. An internal waste evacuation chute extends from the interior of the hollow cutting nose and through the shaft for evacuating plugs of punched material from the nose.

Abstract: An apparatus for removing tiebars of a lead frame after one or more semiconductor components have been encapsulated in a resin to form a package body includes first and second removing stations. The second removing station is provided for removing scraps that may be left between leads of the lead frame after the tiebars have been removed in the first removing station. In the second removing station, the lead frame is positioned on a die. A scrap-cutting punch is moved relative to the die so that projections of the punch are fitted into corresponding holes of the die, thereby pushing the scraps out of the leads and into the holes.

Abstract: A compensating blister die cutter apparatus is disclosed which has the purpose of cutting a sheet of blisters which have been formed on a sheet of plastic material in individual blisters which are generally symmetrical in configuration. The apparatus includes at least first and second blister die cutter units supported by a base member. Each of the blister die cutter units comprises a supporting member which includes a bottom board, a backup plate positioned on the bottom board, and a top board positioned on the backup plate. A rule slot is provided in the top board and a steel rule is located in the rule slot and has a cutting edge. A cavity is formed in the central portion of the bottom board, backup plate and top board as assembled to accommodate the blister shape during the cutting operation. A threaded member connects the bottom board, backup plate and top board together to move as a unit.

Abstract: A material cutting and feeding machine for cutting and perforating a roll of paper. The material cutting and feeding machine includes a generally rectangular frame. A material feeding roller is mounted to the frame. The feeding roller is adapted to hold a roll of paper. A motor is adapted to rotate a draw roller assembly that draws the paper from the paper roll. A cutting assembly is mounted adjacent to the draw roller. The cutting assembly comprises a latitudinal perforating bar adapted to perforate the paper along a width of the paper, a perforating wheel adapted to perforate a length of the paper, and a latitudinal cutting bar adapted to cut the paper along the width of the paper. A guide roller assembly comprised of four rollers and two guides is orientated to feed the paper from the paper cutter to an exit in the frame.

Abstract: A method for forming elastic ventilation cushion comprises the steps of arranging a plurality of needle seats at two banks, an upper bank and a lower bank, and a straight gap is formed between the upper bank and the lower bank, wherein one edge of each needle seat near the other bank is mounted with a plurality of slender needles, wherein each distal end of the needles is folded as a distal folded section; passing an elastic cushion through the gap; and moving the needle seats at the upper and lower banks so that the length of the gap is enlarged or reduced, thereby, the needles on the needle seats will pierce the elastic cushion and the distal folded section will tear surfaces of the elastic cushion to form a plurality of elastic ventilation slits on the elastic cushion. Moreover, the needle seats can be replaced by needle rollers.

Abstract: An apparatus for trimming the width of blinds of the type having a headrail, and a bottom rail and blind slats, and having a support body with a headrail opening, and a bottom rail opening, and a blind slat opening the blind components being insertable into their openings from one side of the support body, a die located adjacent to the support body, a headrail cutting recess in the die, guides on the support body for the die, enabling the die to move relative to the headrail opening between two positions and a bottom rail and blind slat cutter operable to cut the bottom rail and the blind slats. A modified apparatus can be used to trim the width of a vertical blind having a headrail and control rods. Also disclosed is a method of trimming the width of blind, having a head rail, a bottom rail and blind slats.

Abstract: A rotary die cutter for cutting a series of irregular-shaped blanks from a continuous web. The rotary die cutter includes a male die cylinder that has a series of die cavities formed along its outer circumference. Each of the die cavities includes a surrounding cutting edge that defines the shape of the blank to be cut. The male die cylinder is pressed into engagement with either an anvil cylinder or a female die cylinder to form either crush-cutting or shear-cutting nips therebetween. The continuous web is fed into the cutting nip such that the cutting edges of the die cavities contact the web to cut the blanks from the web. A plurality of vacuum ports positioned in the die cavities along the outer circumference of the male die cylinder are connected to a source of vacuum contained in the male die cylinder to remove the die-cut blanks from the web. The die-cut blanks are vacuum-transferred to a stacking unit, while the scrap web is continuously discarded by air-conveying removal.

Abstract: A lightweight, dimensionally stable steel rule die for cutting and scoring carton blanks having a die board containing cutting and scoring rules which is formed of a laminated plastic construction adapted to register and coact with a steel counterplate over prolonged production runs and maintain registration within a tolerance range of about ±0.002 inches.

Abstract: A business form incorporates an improved multi-layer integral card utilizing microperforations to form ties which retain the card during machine handling and printing. The method employs a flexible steel die or engraved die cylinder with microperforations. The die penetrates all layers but the bottom laminate and the microperforations form ties to secure the card until removed for use. The combination and method of forming allows convenient removal of the card by an end user with edges on the removed card being smooth to sight and touch.

Abstract: A tool for separating a common printed wiring board substrate into a plurality of substrates where, prior to separation, the plurality of substrates are connected by at least one circuit connector. The purpose of the tool is to apply pressure along a dividing line to break the common substrate into separate boards without crimping or breaking the connectors between the boards. In a preferred embodiment, the tool has a beveled edge for contacting the common substrate with mechanism for adjusting the location of notches in the beveled edge. The notches are for alignment with the location of the connectors between the boards.

Abstract: The perforating unit comprises: a support (23) with at leat two fixed counterblades (25A, 25B); a first roller (27) revolving about its own axis and carrying a first series of rotary blades (29) acting in combination with a first (25A) one of said fixed counterblades; a second roller (31) revolving about its own axis nd carrying a second series of rotary blades (33) acting in combination with the second (25B) one of said fixed counterblades. The blades of the first series are arranged at a different pitch from the blades of the second series of blades.

Abstract: A cutter for cutting a laminated sheet such as tapes or the like or for shaping or chamfering tape end into various rounded configurations, a method of making such a cutter and an apparatus for shaping and cutting tape end. A sheet metal is worked to form integrally stationary and movable cutting blade which are connected to each other through a pair of connectors. A gap is formed between a stationary cutting edge of the stationary cutting blade and a movable cutting edge of the movable cutting blade. When a resistance force is exerted between the stationary and movable cutting blade on cutting self-adhesive tape with release paper, the resisting force is counteracted by a tensile strength in the connectors and a buckling strength in flexible portions such that the proper gap between the stationary and movable cutting edges will not be changed by the resisting force.

Abstract: A lightweight, dimensionally stable steel rule die for cutting and scoring carton blanks having a die board containing the cutting and scoring rules which is formed of a laminated plastic construction adapted to register and coact with a steel counterplate over prolonged production runs and maintain registration within a tolerance range of about ±0.002 inches.

Abstract: A cutting knife assembly has a baseboard with a generally planar surface. A cutting knife is detachably connected to the baseboard. The cutting knife extends in a perpendicular direction to the baseboard. The cutting knife circumscribes a knife cavity on the baseboard. At least one elongated cross member is affixed to the cutting knife and extends across the knife cavity. The cross member is mounted to the baseboard by a removable fastener. The cutting knife may then be easily removed from the baseboard and resecured.

Abstract: A rotary die cutter for cutting a series of irregular-shaped blanks from a continuous web. The rotary die cutter includes a male die cylinder that has a series of die cavities formed along its outer circumference. Each of the die cavities includes a surrounding cutting edge that defines the shape of the blank to be cut. The male die cylinder is pressed into engagement with either an anvil cylinder or a female die cylinder to form either crush-cutting or shear-cutting nips therebetween. The continuous web is fed into the cutting nip such that the cutting edges of the die cavities contact the web to cut the blanks from the web. A plurality of vacuum ports positioned in the die cavities along the outer circumference of the male die cylinder are connected to a source of vacuum contained in the male die cylinder to remove the die-cut blanks from the web. The die-cut blanks are vacuum-transferred to a stacking unit, while the scrap web is continuously discarded by air-conveying removal.

Abstract: A cutter for cutting a laminated sheet such as tapes or the like or for shaping or chamfering tape end into various rounded configurations, a method of making such a cutter and an apparatus for shaping and cutting tape end. A sheet metal is worked to form integrally stationary and movable cutting blades which are connected to each other through a pair of connectors. A gap is formed between a stationary cutting edge of the stationary cutting blade and a movable cutting edge of the movable cutting blade. When a resistance force is exerted between the stationary and movable cutting blades on cutting self-adhesive tape with release paper, the resisting force is counteracted by a tensile strength in the connectors and a buckling strength in flexible portions such that the proper gap between the stationary and movable cutting edges will not be changed by the resisting force.

Abstract: A sheet cutter cuts a portion of a continuous sheet, discharged through a gap between a pair of moving and stationary knives respectively having arc-shaped and straight knife edges. A motor rotates a pair of rotatable, identical gear wheels engaged with each other and opposed to the moving knife and having a pair of respective link arms thereon. Each link arm has a first end connected to a peripheral position of the respective gear wheel by a pivot thereon and a second end connected to the moving knife by a pin inserted into a respective one of a pair of horizontally extending slits in the moving knife.

Abstract: An apparatus for separating a ribbon-coated multicore optical fiber at a plurality of positions at once, wherein the ribbon-coated multicore optical fiber includes a number of single-core fibers arranged in parallel. This apparatus comprises a first cutting member in which a plurality of sets of arc faces opposed to each other by way of a through path for inserting the ribbon-coated multicore optical fiber are disposed along the through path, while the arc faces in the respective sets extend from one side section of the through path halfway through the width direction of the through path; a second cutting member having a plurality of arc faces which continuously extend to and are adapted to join with the respective arc faces of the first cutting member in the width direction of the through path; and guide members which are respectively disposed at both end positions of the through path so as to position the ribbon-coated multicore optical fiber inserted into the through path.

Abstract: An alignment and mounting system for steel rule cutting dies and the like includes multiple elements: registration pins for ensuring proper disposition of the cutting dies on the cutting drum relative to the bolt pattern of the cutting drum, alignment guides disposed in pairs on adjacent edges of a two section die for assuring proper alignment of the two sections and captive, spring biased fasteners which facilitate rapid securement and release of the cutting die to the drum. Each component may be used individually and provides defined and quantifiable benefits. The use of all three elements in combination, however, provides a synergistic effect which speeds the accuracy and repeatability of installation and use of the cutting as well as simplifying removal.

Abstract: A cutter implement, for use within a cutting tool in connection with the securing of a tensioned steel strap about a package wherein a pair of vertically overlapped end portions of the tensioned steel strap are supported upon an anvil, is provided with a non-cutting recessed portion or notched region at a substantially central portion of its cutting edge such that if the cutting assembly of the cutting tool experiences overtravel movements with respect to the anvil and the pair of vertically overlapped end portions of the tensioned steel strap supported thereon, while the upper one of the pair of vertically overlapped end portions of the tensioned steel strap will be severed by the cutter implement, and while the upper surface of the lower one of the pair of vertically overlapped end portions of the tensioned steel strap may be scored by the cutting edge of the cutter implement, that portion of the lower one of the pair of vertically overlapped end portions of the tensioned steel strap which is engaged by or

Abstract: A cutting device for trimming printed paper packages in a packaging machine. A cutting unit includes an upper part and a lower part which are movable relative to each other when a paper package passes between them. The package originates from paper material on a reel and is formed into a flat tube with glued edges with an unprinted neutral strip. One of the parts of the cutting unit carries two blades spaced apart by a distance equal to the width of the neutral strip and interacts with two counter blades on the other part. An elastic presser is positioned on one of the parts of the cutting unit to hold the package while the neutral strip is being cut by the blades. Spacers are provided so that the distance between the blades can be varied to match the width of the neutral strip.

Abstract: Toothed perforating rules upon the die roll of the rotary die apparatus form tear strips, punchouts, reverse fold lines, nicking connections and similar weakened or frangible sections in corrugated paperboard sheets during passage thereof through the nip between the die and anvil rolls of the apparatus. The teeth of the die rules are tapered and sharpened, and produce perforations in the paperboard panel that decrease in size with increasing distance from the inner liner of the paperboard sheet. The teeth produce an array of relatively long slits in the inner liner of the sheet, and underlying shorter slits within at least one other ply of the panel. The toothed die members may extend at any desired angle or angles relative to the machine direction of the apparatus and/or relative to the direction of the corrugations within the paperboard panel.

Abstract: A cutting device having blades with V-shaped cutting edges and shaped to cause the blade centers to deviate from a vertical plane. One blade is reciprocated. The outer ends of each blade have sliding projections engaging marginal portions of outer surfaces of the other blade so that the cutting edges are drawn toward and cross-over one another during cutting, whereby the blades increasingly move from their bent shape toward a planar shape. The blade edges cut a web from both outer edges toward the center, the center portion of the web being cut last. The blades resume their V-shaped configuration when moved to the open position. By limiting the stroke of the moving blade, the center portion of the web being cut remains uncut. The blades have support frames holding one end of the blades fixed while the opposite ends of the blades are permitted to slide to accommodate movement of one end of the blades which are elongated as they flatten.

Abstract: A perforating rule for perforating paper and plastic including a shank portion having substantially planar side surfaces parallel to a central plane therebetween, a cutting portion having a V-shaped cross-section with the narrower end of the V providing a cutting edge, the cutting portion having portions separated by a plurality of notches extending inwardly from the cutting edge toward the shank portion, and an intermediate portion interconnecting the shank and cutting portions having opposite side surfaces extending from the shank portion to the cutting portion. The thickness of the rule at about 0.024 inch from the cutting edge is about 0.014 inches, the notches have a width in the direction of the length of the rule of about 0.007 inches and a depth of about 0.025 inches, and the portions of the cutting portion have a width in the direction of the length of the rule greater than the width of the notches.

Abstract: A strip steel punching and indenting tool (15) and a method for preparing this type of tool wherein the tool, arranged between a ram (12) and an anvil (14) of a punching machine (10), comprises a supporting plate (16) with slots (18) extending from the lower side of the supporting plate facing the anvil (14) to its upper side facing the ram (12). Each of the slots (18) accommodates a cutter of strip steel for punching (20a, 20b) and indenting (20c), in such a way that the hardened cutting edge (22) of a cutter protrudes from the lower side of the supporting plate (16) and the rounded non-cutting backs (24) thereof face a first intermediate plate (26) of metal mounted on the upper side of the supporting plate. To be able to prepare the punching and indenting tool within a short period of time without impairing the punching performance of the punching machine, the first intermediate plate (26) is between 0.8 and 1.5 mm thick, consists of a metal with a 0.2-tensile yield strength R.sub.p0.2 of 20 to 90 N/mm.sup.

Abstract: A device for partially shearing single or multiple sheets of material comprising a base having a recess and a lower blade fixed in the recess. A pair of movable blades having opposed ends are pivotally attached to the base at one end. A lost-motion connecting link connects the free ends of the pair of movable blades together and is connected to a hydraulic piston which moves the link a limited distance towards the base, thereby to rotate both movable blades relative to the fixed blade with a scissors-like action. When the pair of blades is moved towards the lower blade, the material is cut inward from both sides or edges of the material, leaving an inner uncut portion of material having a width which corresponds to the stroke of the movable blades.

Abstract: In one aspect, an article of manufacture constituting a flat planar sheet of material having slits cut therethrough in selected patterns to define the configuration of a subsidiary portion of the flat planar sheet of material, while means of attachment are provided at each change of direction of the perimeter of the subsidiary portion of the sheet. Formed in the flat planar primary sheet of material are lines of flexibility formed by linear compression over a very limited area of the flat planar sheet of material to diminish its thickness along the lines of fexibility thereby permitting flexure of the planar sheet of material along the lines of flexibility.

Abstract: A cutter apparatus having a fixed blade in an opening of a paper feeding guide; and a movable blade having a cutting portion which enters into the opening. A paper holding plate is provided on the movable blade slidably in the cutting direction. The distal end of the paper holding plate is kept projected by a sliding mechanism in the cutting direction from the distal end of the cutting portion of the movable blade. With the paper holding plate firmly holding the paper against the feeding guide, the sliding mechanism further moves the movable blade into the opening. On carrying out the cutting operation, firstly the paper holding plate slidingly reaches the recording paper and tightly keeps the paper stationary. Thereafter the cutting portion of the movable blade moves forward enters into the opening to cut the paper. The result is that the recording paper does not escape when undergoing the cutting operation, the cutting quality can be kept excellent to a certain extent irrespective e.g.

Abstract: A piercing blade for perforating slits in a continuous tubular web of thermo-plastic material is shown. The blade is used in a machine to form individual bags from the tube by heat sealing the bottom and perforating the top of the next bag. The piercing teeth in the blade have formed in the front face a number of horizontal grooves which serve to pick up the edge of the top layer of the slit to form a burr thereon and thus separate the two plys of the tubular web, facilitating the opening of the top of the bag when it is separated from the roll of continuous tubular material.

Abstract: A device for perforating a tubular film of plastic material flattened to form a roll of pre-formed bags for individual separation from the roll, has a perforating knife with a plurality of pointed teeth spaced along the bottom edge thereof disposed for reciprocal piercing of a continuous tubular film of plastic passed over a work support surface having a hollow slot therein. The teeth are hollow-ground to provide a slightly arcuate cutting edge along each tooth that produces a non linear perforation in the tubular film of plastic and partially seaprates the top layer of the plastic from the bottom layer. The teeth are spaced apart a desired distance to leave sufficient attaching tabs so that the roll of bags does not prematurely pull apart. Minimum tension and penetrating pressure are achieved with the present invention and result in less distortion and unwanted tearing of the end product and greater life for the piercing blade and a more easily separated and opened bag.

Abstract: In a progressive die for punch press operations in which a strip of material is fed into the press and sequential operations are conducted on the strip including the separation of parts from the strip. The die is provided with a construction which forms an integral carrier tab between the parts to be separated. In the embodiment ilustrated, the operation is the manufacture of rotor and stator laminations for a dynamoelectric machine. The strip of material is fed into the press in which the die is mounted, and the respective rotor and stator laminations are formed in a series of workstations within the die. The improvement in the die construction is a punch station for substantially but not completely separating the rotor lamination from the strip. Thereafter, additional operations are constructed on the strip, the rotor lamination being completely separated at a subsequent workstation.

Abstract: A shingle ridge cap cutter utilized for cutting uniform sections from roof shingles comprising a frame along which a shingle is guided to a manually operated cutter that comprises spaced blades that are moved to sever a section of the shingle. The cutter blades are provided in spaced-apart, non parallel relationship so that a combined rectangular and trapezoidal-shaped ridge cap is made by single movement of the cutter with the roof shingle positioned so that the cutter blades are aligned with the slots along one edge of the shingle. Provision is made for operation to prevent injury to the hands of the worker.

Abstract: A portable business card slit cutter includes a base member and cutting member which is rotatably affixed to the base member. A pair of triangular shaped cutting blades are affixed to the cutting member and a corresponding pair of receiving slits are positioned on the base member so that the blades are inserted into the slits when the cutting member is rotated toward the base. When a sheet of paper is positioned on the base member, the blades cut slits in the paper. The blades are spaced apart by an amount so that, when the slits are cut, opposite corners of conventional business card may be inserted into and held by the slits. The slit cutter includes a paper stop for positioning the paper as well as a paper width positioner. The cutting member is affixed to the base by a hinge mechanism and held spaced apart therefrom by springs. The cutting blades are held by Tee shaped carriers which are inserted into Tee shaped carrier slots in the cutting member.

Abstract: A self-sharpening perforating punch head for perforating a web of plastic film is formed of one or more plates of a semirigid plastic resin, e.g. acetal homopolymer. The head has a row of tapered and beveled teeth which form a cutting edge at the back plane of the head. The cutting edge renews itself as the material wears by plastic-on-plastic abrasion. There are gaps provided at intervals among the teeth.

Abstract: A bag and a method and apparatus for forming an easy open bag in a vertical form-fill-seal process wherein a bag is formed from a sheet of thermoplastic film and a heat seal betwee bags as they are filled serves as the top closure for the lower bag and a bottom closure for the upper bag, the easy open feature being provided by easy tear slots which are cut at acute angles in both the bottom seal of a bag and the top so that an opening corner of the bag may be torn in either the top or bottom of the bag.

Abstract: A mechanism for feeding a ribbon having discrete three dimensional objects includes a specially formed finger which fits through a U-shaped opening from the back side of the ribbon and incrementally drives the ribbon into position where it is severed along a predetermined line by a knife which moves transverse to the direction of movement of the ribbon. The knife includes a gap in the blade opposite the U-shaped opening to avoid severing a tab associated with the U-shaped opening.

Abstract: A cutting device is provided for use with a printer having a plurality of movable blades which are disposed in side-by-side relationship and driven in a direction perpendicular to the length of the blade. A plurality of solenoids are provided for driving each movable blade. A spring, which is arranged to be depressed by the movement of the movable blade, applies a pressure to the paper to fix the paper in position before the movable blade reaches the cutting position.

Abstract: An apparatus which produces a precisely shaped and positioned perforated line in a blank for a parallelepipedic package has a blade and a roller for pressing the blank against the blade. The blade is stationary relative to the packaging blank and provides a perforated line which does not penetrate the inner layer of the packaging material. The roller is mounted on a connecting bar which is linked to a reciprocating drive. The roller moves in a guide which positions the roller relative to the blade during each stroke of the reciprocating drive.

Abstract: Apparatus for cutting printing plates, comprises a cutting press with relatively movable platens one of which carries a form cutting tool for severing or partially severing from a processed sheet of flexible material a central image-bearing portion for use as a printing plate. Retractable registration and holding means engage registration targets on said sheet so as to locate the sheet in registry with the form cutting tool and to hold the sheet in position at least until it is held by the pressure of the cutting tool thereon.

Abstract: Apparatus for cutting holes and notches in thermoplastic film by using heated steel rule dies. The dies are set into a heated die block, and scrap passes through the die, and through a hole in the heated die block so pieces of scrap fuse together as they pass through the block. The die block is fixed, and a movable platen urges the film down against the heated dies. A stripper is biased up to strip the film from the dies after cutting, and is resiliently movable down to allow cutting. Air can be directed through the stripper to blow the film up, off the stripper, to prevent melting when the film motion stops. Use of two dies accurately spaced can cut wicket holes and provide accurate cutting to assure proper operation in a bagging machine.

Abstract: An arrangement for perforating foils, particularly of synthetic plastic material, has an elongated cutter and a counterelement movable relative to one another in a direction of elongation of the cutter and also toward one another, wherein the cutter is provided over its entire length with an uninterrupted cutting edge, and the counterelement is composed of a plurality of rollers movable about their axes and located adjacent to one another, so as to provide for selective perforating or cutting.

Abstract: A strip 10 of slips 12 is characterized by breaking portions 62,64 at which each individual clip 12a, 12b, 12c is separable from its longitudinal neighbors these portions being coextensive, longitudinally of the strip, with the line of separation 60 which divides off each clip from its longitudinal neighbors and which is formed without removal of material of the strip. This line is achieved by shearing the material of the strip while bowing it about a longitudinal axis so as to present a curved surface to an oncoming shearing tool which has an oppositely curved surface. The extent of the intersection of the opposite curve defines the length of the line of the separation. The breaking portion is adjacent each end of the line. The clips during severence suffer apparent lateral contraction but no longitudinal distortion.

Abstract: A hinged carton integrally molded of polystyrene foam and adapted to be locked shut by a flap extending upwardly from the bottom part of the carton inside a side wall of the carton cover and carrying one or more prongs so that the latter will be biased outwardly to snap into a corresponding number of holes provided in said cover side wall, the ruggedness of said carton being materially enhanced over similar cartons of the prior art by the local beefing up of said cover side wall in the immediate areas bordering said holes incidental to the functioning of a novel method of and apparatus for manufacturing said carton. Said apparatus is embodied optionally in a forming tool or in a form-and-trim tool and embraces relatively vertically reciprocable carton shaping matched-molds operating on a heated thermo-plastic web of polystyrene foam to produce one or more entire cartons with each reciprocation.

Abstract: A ribbon decoration which is formed of a length of ribbon having a series of transverse slits spaced apart along at least a portion of its length. The slits are formed alternately in one side edge and the other and each slit extends only part way across the width of the ribbon. The ribbon is formed into loops between the slits by interengaging slits on one side of the strip with slits on the other side. A device is also disclosed for slitting the ribbon.

Abstract: A reciprocating knife expanded metal machine has a knife for producing parallel strand expanded metal mesh. The knife has cutting teeth with the effective cutting edges of adjacent teeth spaced by a distance almost as great as the length of an effective cutting edge of a tooth. The leading portion of the cutting edge of each tooth is longitudinally and convexly curved.