Abstract: Improved blank-stripping apparatus for rotary die cutters of the type which have a die cutting roll, and an anvil roll for supporting paperboard blanks against a cutting rule on the die cutting roll, includes a rotary-cam-timed valve system pressure-actuating one or more pneumatic piston and cylinder assemblies within or adjacent the cutting rule for ejecting scrap radially from the cutting rule in synchronism with rotation of the die cutting roll; after scrap ejection the valve system vents pressure so that contact with a succeeding paperboard blank and/or spring bias easily retracts the plunger to position for pneumatic actuation in the succeeding cycle of operation.

Abstract: A means and method for handling trim strip slit from the margin of a travelling web, comprising rotary means by which biasing forces is applied to the strip away from the slitter into the chute. Within the chute relatively low velocity means advance the trim strip in a foldably bunched condition toward the bottom of the chute where the bunched trim strip is then transported away from the chute. Low velocity air, as well as rotary members are provided in the chute for effecting the foldable bunching and advancing of the trim strip. Either or both of low velocity air and mechanical conveying apparatus may be provided for transporting the trim strip away from the bottom of the chute.

Abstract: Stripping apparatus to remove scrap around die cut blanks in a web comprises a roll pair through which the web is passed, one roll carrying spikes to impale the scrap pieces and the other roll carrying abutments to contact the scrap pieces on the opposite side to the spikes. According to the invention the abutments are retractable, so that effectively the scrap piece is pinched between the spike and abutment shortly before the nip of the rolls. FIG. 1 illustrates the preferred arrangement.

Abstract: In accordance with the present invention protective envelopes for suction tubes or drinking straws as well as the tapes joining them are manufactured at the same time and of the same material. The suction tubes are placed with equal intervals transversely between two thermoplastic webs, whereupon these webs are sealed to each other around the suction tubes. At the same time the webs are punched or cut so that individual suction tube envelopes are obtained which are mutually connected by means of straps extending between the envelopes. In this manner all handling of separate wrapped suction tubes is avoided, so that the suction tube band can be manufactured with appreciably greater precision. The invention relates to the method of manufacture as well as to a machine for its realization and the finished suction tube band.

Abstract: An apparatus for making thermoplastic carrier bags (so-called T-shirt bags) comprises means for feeding a continuous tubular strip of thermoplastic film, either side of which comprises a gusset fold, said strip being advanced with a constant velocity to a cylindrical drum the housing of which comprises embedded heatsealing means, said apparatus further comprising a cutting member and a transverse cutting knife co-operating with the strip said member sequentially providing the tubular strip with a U-shape cut upstream of the drum and said cutting knife operating synchronously with the cutting member in co-operation with the drum for transversely cutting through the strip somewhat beyond the legs of said U-shape cut so as to produce strip portions, said drum further comprising folding means for said strip portions.

Abstract: Apparatus for depositing successive sections, such as carrier bag blanks, severed from the leading end of a web of superposed film layers fed through a transverse welding and severing station comprises nozzles for holding said leading end taut by means of an air jet, revolving suckers for engaging said leading end, and holding means to which said leading end is transferred by the suckers after each section has been severed.

Abstract: A punch for a cutting die is provided for forming holes in corrugated board or the like. The hole punch includes a tubular metal member of circular transverse cross section having one end substantially flush with the back surface of a die plate in which it is mounted and the other end extending beyond the front surface of the die plate and terminating in a circular cutting edge. A body of resilient material, such as natural gum rubber or latex, is located within the cylindrical member and has one end terminating near the back end of the tubular member and another end terminating near the cutting edge of the tubular member. The purpose of the body is to eject and strip the scrap of corrugated board from the punch and from the rest of the blank being formed by the cutting die. The resilient body has a central, cylindrical passage extending completely therethrough, in a preferred form.

Abstract: A rotary die cutting machine having an integral scrap stripper for separating the scrap portion from the product portion of the cut sheet. The rotary die cutting machine includes a rotatably mounted cylindrical die cutting roll including a number of circumferentially and longitudinally extending upstanding rule-like dies affixed to the outer surface of the roll and defining a pattern for cutting a sheet into a product portion and a scrap portion. The scrap stripper includes a plurality of pin-like impaling members projecting outwardly from the roll, the pin-like members being positioned on the roll so as to pierce and hold the scrap portions to the roll such that the product portion separates from the scrap portion as the roll rotates.

Abstract: A stripping device for removing waste sheet material from the vicinity of a cutter. In one embodiment, a plurality of pins are mounted to a rotatable drum positioned adjacent a rotary steel cutting die. The die includes knives for cutting a sheet of material into a desired configuration with the waste portion of the sheet remaining wedged on the die. The stripper pins pierce and lift the waste portion of the sheet away from the die. In lieu of a drum, a plurality of hubs mounted to a common shaft may be provided having the stripping pins mounted thereon. In another embodiment, the stripping pins are mounted directly to the rotary cutter. A cam-actuated lever mounted to the rotary cutter is operable to eject the waste sheet portion from the stripping pins.

Abstract: A method for producing an enclosed, multipaneled envelope from webs of material in a manner such that the desired multipaneled shape of the envelope can be formed by a single peripheral application of a platen sealing device to positioned webs comprising a first web, and second web with at least one folded web interposed therebetween. Both geometric and nongeometric multipaneled envelopes can be produced in this manner from materials suitable for filling with a lighter-than-air gas to form toy balloons and the like.

Abstract: A method of making a display mount for holding calendars, photographs, and the like, is provided with a rectangular backing panel, an intermediate spacing panel mounted adjacent thereto, and a partial face panel mount in the front of the intermediate panel. The panels have been case bound with a facing material and die cut to form one or more mounting wells therein. The pockets for the mounting well use only a partial face panel allowing for easy removal of the die cut portions, and the reduction of the weight of the display mount. The method includes cutting a single piece of planar material and scoring parallel lines for folding into three panels.

Abstract: Box blanks produced from a moving web by a paperboard corrugator are shingled on a stacker conveyor. The corrugator includes a shear which severs the web in response to a production run change signal into leading and trailing portions. A cut-off machine cuts the severed web portions into the box blanks. Box blanks cut from the leading portion of the severed web are part of the old production run. Box blanks cut from the trailing portion of the severed web are part of the new production run. The leading edge of the trailing portion of the severed web is tracked to the cut-off machine. The trailing edge of the first full size box blank of the new production run is detected at a first position relative to the stacker conveyor. The trailing edge of the first full size box blank is then tracked to a second position on the stacker conveyor. When the trailing edge of the first full size box blank reaches the second position, a command signal is generated.