Abstract: Improved aperturing of a web can be obtained by providing pins with an extended tapered section that is substantially convex in shape. When the tapered section is longer than the penetration depth of the pins into the receiving recesses of a female roll, frictional forces in the nip between layers are reduced. Pins with extended tapered sections can be used in devices for producing apertured composite web assemblies comprising sections of absorbent matter attached to a nonwoven web or other carrier layer.

Abstract: A perforating device for production of a plurality of an apertures in a sheet-like material, each aperture has an opening and a rearwardly folded flap which adjoins a rear zone of the opening. The device comprises a frame from two supporting means spaced on both sides of the drawing material, an anvil roller with a cylindrical outer surface extending substantially the full width across the sheet-like material. A plurality of circumferential grooves dispose along this surface for transiently receiving flaps into. The continuously drawing material partially encircles the outer surface at any time to provide to the anvil roller the same speed. A perforating roller matching the anvil roller at any time for maintaining the same speed, includes a plurality of an adjustable perforating means radially protruding from the same and provides the apertures in the partially encircling continuously drawing between both rollers sheet-like material with simultaneous flaps deflecting from openings into grooves.

Abstract: A punching apparatus includes a setting input section setting the number and positions of holes to be punched out in a paper sheet, a transfer mechanism to send the paper sheet to a process stage, and a plurality of line sensors to detect posture of the paper sheet sent to the process stage. The punching apparatus also includes a holding portion holding a plurality of pins to punch a hole in the paper sheet, a slide mechanism to slide the holding portion along the rail, and a rotating mechanism to rotate the holding portion, a pin interval adjusting mechanism to adjust intervals between the pins, a pin projecting and retracting mechanism to independently project and retract the pins relative to the holding portion, and an elevator mechanism to move down the holding portion toward the paper sheet to cause the pins to act on the paper sheet. The posture of the paper sheet sent to the process stage is detected by the line sensors.

Abstract: Methods and apparatuses for producing fiber-cement soffit building products. In one embodiment of the invention, an apparatus for producing fiber-cement soffits includes a punch assembly, a support assembly facing at least a portion of the punch assembly, and an actuator operatively coupled to at least one of the punch assembly or the support assembly. The punch assembly can include a punch plate and a plurality of punches coupled to the punch plate. Each punch can have a length and a first cross-sectional dimension generally normal to the length. The support assembly can have a support plate, and at least a portion of the support plate is juxtaposed to at least a portion of the punch plate. The support plate can include a plurality of holes arranged in a pattern so that each hole in the portion of the support plate juxtaposed to the punch plate is aligned with a corresponding punch on the punch plate.

Abstract: The invention discloses a method of manufacturing a perforated roller cover and includes placing a roller cover having a core portion and an application medium on a support member, positioning a perforating station having a perforating device near the support member, exposing the core portion, moving the perforating device from a non-piercing position to a piercing position to pierce the core in a first location and a second location and removing the roller cover from the support member.

Abstract: A hole-forming device includes a base member having a hole-forming projection facing a bottom of a can. The hole-forming projection is formed on an upper surface of the base member. The base member is slidable upward to the upper part of a case by pushing a pressing member. The hole-forming projection is normally held in the case for safety.

Abstract: The present invention relates to a packing, sealing and cutting machine for plastic film comprising a film-delivery device mounted with a film tension adjusting button and a rolling needle delivery shaft such that the film is provided with a plurality of holes during the delivering of the film. A separation rod and an electrostatic elimination rod are provided along the path of the delivering of the film so that the delivery of the film is smooth. The front delivery seat is positioned by a teethed rack to adjust the movement of the packed object. The sealing and cutting knife driving device drive the vertical and horizontal knife to seal and to cut the film after an object is packed.

Abstract: A device and method for selectively perforating sheets of paper that are moving successively through a perforation device, where the perforation along a direction of the movement. A perforation device performs the perforation. The perforation device includes a perforating tool having a perforating position in which the paper is perforated and a neutral position in which the paper is not perforated. The perforation device further includes a control unit to control the perforating tool by optionally setting the perforating tool in either a perforating position or neutral position. The sheets are run successively through the perforating device, and each selected sheet is perforated in its direction of movement. The perforating tool receives a control signal to set the perforating position if a sheet to be perforated enters the perforating device, and the sheet is perforated along the direction of movement in accordance with the signal.

Abstract: A cutter apparatus 6 includes a rotary cutter 10 which is rotatably supported and has a cutting edge formed on the circumference thereof, a fixed cutter 20 cooperating with the rotary cutter 10 to hold a sheet member between them, a carriage 11 for moving the rotary cutter 10 in a reciprocating manner along a cutting line, and a stopper 22 used to switch a full cutting mode in which the cutting point of the rotary cutter 10 is allowed to pass through the side end of a record sheet S to a partial cutting mode in which the cutting point of the rotary cutter 10 is caused to stop before the side end of the record sheet S or vice versa.

Abstract: Upper and lower mirror image die plates are resiliently supported and have predetermined displacement values for forming vortex generators and foldline crease channels without compressive deformation in a porous sintered metal fiber sheet material. Cutters and ridges coupled to the upper and lower die plates form the respective vortex generators and channels. The sheet of so formed material is then placed in an apparatus for bending the sheet at the foldline channels to corrugate the sheet without deformation of the sheet material between the corrugation bends. Fingers align with and engage the channels. The fingers are on plates that are ramped closer together simultaneously while the fingers on two mirror image coplanar sets of plates displace toward each other as the sheet material is folded. Pins on a pair of rotating levers engage each of the finger plates of the two sets for relatively horizontally displacing the plates and corresponding fingers as they are ramped together vertically.

Abstract: A device, which can be incorporated into a kit, useful in carving decorative designs in the shell or skin of fruits or vegetables having a base plate, which is preferably flexible, containing a plurality of co-planar, upstanding, piercing elements, in a decorative pattern relative to the base plate, whose axis are formed in a plane substantially perpendicular to the plane of the base plate. The drive pins forming an elongated shaft, having one end secured to the base plate and the other forming a piercing point. The carving kit includes the device having driving pins configured in a pattern, at least one cutting tool for inserting into the perforations made by the device; and instructions for use of the device in conjunction with the cutting tools. Preferably the device is used to facilitate carving of pumpkins at Halloween.

Abstract: The preferred embodiment of the present invention comprises a pizza docking device having a pair of guides atop a pan and retaining a roller therein. Said roller has a plurality of pins thereon in spiral orientation. The device is dimensioned such that when an uncooked pizza crust is place on said pan, said roller may be traversed across said crust, docking it with perforations of a desired spacing and depth. A pair of shelves is provided in an elevated portion of said guides for placement of said roller up and away from said pan such that crusts may be placed and removed.

Abstract: The invention relates to a method of manufacturing perforating tools, as well as perforating tools manufactured according to the method. The tool is manufactured in that a number of blades (2) are placed densely packed together in a bracket. The blades (2) are, along their one longitudinal side, serrated with a large number of teeth (3). The serrated sides of the densely packed blades (2) form a serrated surface (5). The serrated surface (5) is processed such that the teeth (3) are removed from selected surfaces (8) of the serrated surface (5) and that the remaining teeth (3) form a perforation pattern (7).

Abstract: A paper product has a first sheet with a pattern of spaced openings permitting separation into sections and a second sheet releasably attached to the first sheet with a pattern of continuous curvilinear openings dividing the sheet into sections and being aligned with the openings of the first sheet. A die sheet for a die for cutting material includes a die sheet surface with a die pattern extending outwardly from the die sheet surface. The die pattern has slitting sections providing curvilinear, continuous openings through a second sheet of the material and spaced perforating sections extending above the slitting sections providing a pattern of spaced openings in the first sheet adjacent to the openings through the second sheet. A first method of constructing a die sheet includes covering a die surface with a first, spaced pattern of a first photo-resist material and then covering the first pattern with a second, continuous pattern of a second photo-resist material.

Abstract: A method of making a perforated laminate wherein a pliable perforation device having plurality of holes and plurality of perforation pins in the holes is assembled on a laminate; the pins are driven through the uncured laminate to perforate the laminate; the laminate is then staged or cured with pins in place; and the pins are then removed from the cured laminate and pushed back into the perforation device for reuse thereof.

Abstract: A method of forming a slit in a reseal element having an outer surface defined by a proximal end thereof, a semi-spherical inner surface portion defined by a dome region of the proximal end, and an annular inner surface portion which circumvents the semi-spherical inner surface portion. The method is accomplished through the use of a cutting assembly which includes a locator plate having a locator cavity disposed therein, a cutting core, a support fixture, and a blade member. The method comprises the initial step of inserting the reseal element into the locator cavity of the locator plate. Thereafter, the dome region of the reseal element is pre-stressed by the contact of the support fixture thereagainst, with the blade member then being advanced upwardly through the proximal end of the reseal element to form the slit therein.

Abstract: A drilling jig has a pyramidal tip, a cylindrical portion, and a proximal end. The pyramidal tip is formed like a polygonal pyramid and each pyramidal face is provided with a concave. The cylindrical portion connecting with the pyramidal tip is formed like a prism and the proximal end is made of a flat plate functioning as a stopper. The drilling jig makes it possible to efficiently recover sodium from a spent NaS cell without greatly damaging the structure of the cell.

Abstract: There is provided a nurser liner having a pair of removable textured tabs for mounting the nurser liner to the rim of a nurser container. The tabs have a textured surface formed by piercing and embossing with forming tools. Each tab has a plurality of pierced holes that go through the tab to form an improved surface for gripping and handling. Each tab also has a plurality of embossed areas that supplement the pierced holes to improve gripping and handling while minimizing wear to the forming tools. In addition, the tabs may have a three segment pattern such that a smooth, non-textured center portion is located between textured portions on either side of the center portion. Accordingly, the combination of pierced and embossed areas provides the gripping advantages of pierced tabs while minimizing the amount of wear caused to the forming tools.

Abstract: A cigar draw tool that holds a cigar in alignment with a needle-like punch. The punch is pushed through the length of the longitudinal axis of the cigar to create an open air channel that increases the capacity of the cigar to draw. Multiple alignment apertures are provided to allow the punch to create multiple parallel air channels in the cigar such that the user can increase the drawing capacity as desired. In addition, the multiple alignment apertures are arranged to accommodate cigars of varying sizes such that cigars of any width can be punched in the central portion of the cigar by moving the punch to an alternate alignment aperture. A removable lid is used to hold the cigar in alignment with the punch during the punch operation. An alternate embodiment uses an automatically retracting lid that is spring loaded hold the cigar in alignment. Another alternative embodiment uses a hinged lid that flips open to allow a cigar to be inserted or removed.

Abstract: A hole-forming device includes a pointed shaft which is raisable to a position facing a bottom of a can. The shaft is slidably supported on a support plate, with its lower end projecting downward below the support plate. With the hole-forming device mounted on the bottom of the can, and the bottom of the hole-forming device on a surface, such as a floor, a downward force on the can urges the pointed end of the shaft into the bottom of the can to safely puncture the can.

Abstract: A multi-blade perforation assembly having either rotary or straight blades provides adjustable, small cut and tie ratios for multi-ply forms without diminishing the quality or reliability of the forms.

Abstract: A novel stock roll support assembly and loading method for a cushioning conversion machine that produces dunnage product from sheet stock material supplied as a roll provides for easier loading of the stock roll onto a roll support at the upstream end of the cushioning conversion machine in certain situations, such as where the machine is located against a wall or over (or under) a conveyor, etc. The stock roll support assembly is connected to a main frame of the machine for rotatably supporting a roll of sheet stock material. The stock roll support assembly includes a stock roll support mounted to the main frame for swinging movement between an operating position and a loading position. In the operating position, the stock roll support is operative to support the stock roll adjacent the main frame, and in the loading position, the stock roll support is swung away from the main frame to facilitate loading of a stock roll thereon.

Abstract: A rotatable perforating roll, for use in a continuously operating paper-converting rewinder, comprises at least a first plurality of pockets and a second plurality of pockets, each of the pockets designed to receive at least one perforating surface therein. The pockets are spaced apart from one another along the roll's outer circumference such that the pockets of the first plurality are equally spaced from one another at a first angular distance, and the pockets of the second plurality are equally spaced from one another at a second angular distance different from said first angular distance, but the pockets of the first plurality are unequally spaced from the pockets of the second plurality.

Abstract: A technique of attaching a thermally conductive metal plate or sheet to a flat surface of wood holders in a process of fabricating modular unit radiation panels for mounting in a floor or a wall of a room of a building heated by a hydronic heating system that pumps hot water through tubing that is held by said modular units for RFH or RWH, respectively, wherein the modular unit is an assembly of the thermally conductive metal plate or sheet having length, width and thickness and the wood holders are two fiat wood boards evenly spaced apart to provide a slot in which said tubing is inserted and held against said metal plate or sheet, using a tool having a base and a point so configured that, the tool point thrust into the modular unit through the metal plate or sheet into the holder makes a hole in the holder and cuts a tab of the metal from the sheet that is embedded into the hole, the free end of the tab being wider than the end thereof attached to the metal plate or sheet and the free end of the tab being w

Abstract: An apparatus is described for forming a web (N) that is permeable to liquids and designed to separate two environments and to allow the liquid to flow in one direction from one of said environments to the other, in which said web is caused to pass between two contra-rotating cylinders (5, 7) that are pressed against each other, one of said cylinders (7) having a surface provided with projections which cause perforations in said web (N). The cylinder (7) with the projections is turned at a peripheral speed greater than the peripheral speed of the other cylinder (5), with a consequent relative slipping action between the surfaces of the two cylinders (5, 7).

Abstract: A reseal is partially perforated by stretching the reseal membrane, establishing contact between one side of the membrane and an anvil, and by effecting partial penetration of the membrane with at least one cutting edge from the other side of the membrane to a predetermined distance from the anvil. Multiple partial perforations may be made with one or more cutting edges.

Abstract: A device for removal of slips from a continuously transported slip web is composed of an advancement roll pair which continuously advances and holds the slip web. A blade cylinder pushes a respective lead end of a slip into an open gripper of a gripper cylinder. A device is arranged between the advancement roll pair and the blade cylinder and provides transverse perforated lines. A rotating tear-off segment cooperates with the blade cylinder. In order to enable a simple and rapid adaptation to different slip formats, the advancement speed of the advancement rolls, the transverse perforating device and the angle of action of the tear-off segment are correspondingly changed relative to the blade cylinder.

Abstract: A device for producing a track of perforations transverse to a paper web including a support for advancing the web past the device, a rotatable shaft at one side of the web, a perforating comb supported on and rotatable on the shaft when the shaft is rotated. A web support body on the opposite side of the web from the shaft contains a groove in the underside of the web support body into which the perforation comb teeth extend when the perforation comb rotates past the web. The web contacts the underside of the web support body and also the ends of transverse ribs which divide the groove in the web support body into individual sections.

Abstract: The invention provides a perforation cutting rule for a rotary cutting machine and method of operating the same. The cutting rule has a length, height and thickness and includes a plurality of dovetail-shaped gaps formed along a longitudinal edge to define a plurality of dovetail-shaped cutting teeth. Each tooth includes an outer cutting end and an inner base end, the outer cutting end having a length greater than an inner base end. As the cutting end cuts through multiple sheets the angled sides of the dovetail-shaped teeth provide a relief area to prevent the sheets from bunching or pulling against the teeth during the cutting operation.

Abstract: A needle roller arrangement includes several needle rollers arranged in a freely rotatable manner in a rotary frame on a circular line which is concentric to its rotational axis. One of the needle rollers interacts with a brush roller for perforating a material web passing through the arrangement. In order to be able to lift the needle roller interacting with the brush roller away and replace it while requiring less energy, each roller is arranged inside the rotary frame such that it can be lifted off of the brush roller. The needle roller interacting with the brush roller is respectively provided with an arrangement for removal from the brush roller and application to the brush roller.

Abstract: A signature perforating device includes a perforating cylinder and a cooperating counter perforating cylinder. The perforating cylinder carries a perforating blade strip which is formed by a number of perforating blade elements. These elements are held in place on the perforating cylinder in a profiled blade holding strip. Individual ones of these perforating blade elements can be removed from the strip for replacement without disruption to adjacent blade elements.

Abstract: A signature perforating knife that is useable to perforate multi-layer signatures is formed as a compound knife using either several knife blades or a combination of knife blades and spacer blades. Each compound perforating knife has a uniform base thickness. The specific characteristics of the compound perforating knife can be adapted in accordance with the weight of the paper web being printed and the number of layers of the multi-layer signature which will be perforated and then folded in a folding apparatus of a web-fed rotary printing press.

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: Device for holding perforating tools opposite a sheet-carrying cylinder of a rotary printing press includes a bearing and indexing shaft, a carrier body axially displaceably supported by the shaft, the carrier body being formed with a bore extending therethrough axially parallel to the shaft, the carrier body being provided with a clamping device for clamping the carrier body relative to the shaft and with an actuating device for, respectively, effecting a mutual clamping of the shaft and the carrier body and for releasing a mutual clamping of the shaft and the carrier body, the actuating device including rotatably supported rings carried by the carrier body around the shaft, the rings including an eccentric ring provided with a perforating tool.

Abstract: A release device for an air cushion or thermal insulation barrier of a double or multi glazed glass unit comprises interfitting first and second members which are movable relative to one another, the first member having associated with it a pin or striker which is movable with the first member from an inoperative position to an operative position to crack or penetrate one or more glass panels of the unit, the device has one or more ventilation orifices to enable release of the sealed air cushion or thermal insulation barrier between the panes of a glazed unit. To limit the relative movement of the first and second members of the device there is within the device interfitting projections. The device, which may include one or more springs, may be mounted on a support structure for movement from an inoperative position to an operative position.

Abstract: An apparatus for the processing and segmenting of a cover-forming laminate web or sheeting structure which is adapted to interconnect a plurality of containers, such as the base members of blister packages each of which is designed to contain a hydrophilic contact lens in a sterile aqueous solution. More specifically disclosed is an apparatus for the imprinting, perforating, slitting and cutting the laminated web structure such that the severed laminate segments constitute printed covering label for an array of such containers, and whereby the laminated web or sheeting segment may be severed along weakening or perforation lines so as to provide a separable packaging arrangement for individual of the containers which are subsequently adhered thereto.

Abstract: An apparatus for producing a fissured, acoustical ceiling panel wherein the pins used to fissure the panel are roll applied thereto. The pins are embedded in flexible, resilient polymeric plates, and a plurality of the plates are attached to a rotary drum which is used to apply the fissuring pins to the surface of the panel. The invention also includes the method for manufacturing the polymeric plates which are molded and formed with the fissuring pins embedded therein.

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 dome shaped tool is provided for use with a standard one gallon and one quart adapted to be positioned over the sealing ring groove in the paint can. This tool includes 4 equally spaced guide/puncture tips which are attached to the underside an inside of the dome and extended downward.

Abstract: A perforating blade and signature having a unitary blade (12) that is very narrow in width in proportion to its length, with a cutting edge (16) along one longitudinal side. The cutting edge (16) comprises a combination of a number of spaced-apart straight (12) and angled (20) sections arranged so that the angled sections (20) angle inwardly toward a center point (18) on the perforating blade and along a single side of the cutting edge only. In one embodiment the pattern starts with a single long cutting tooth in the center (18) of the blade followed outwardly from the center on both sides with a repeating pattern of three angled teeth followed by a short straight tooth and so forth. The angled teeth (20) are all angled to the same side of the blade so that the resulting fold line (26) has cuts only on one side (29) of the fold line. The angled cuts result in ties (28) that twist easily, and that, therefore, result in fold lines (26) that fold cleanly without gusseting or binding.

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 dispenser for cutting and feeding a web of flexible sheet material is described in which a feed roller carries a web cutting blade and a spring connected to an eccentric crank affixed to the feed roll. While initial movement of the web through the mechanism and actuation of the cutter to effect partial separation of the web material is produced by the user's pull on the web, such pull also loads the spring which, upon unloading, delivers the cut web material from the dispenser. The spring is designed to gradually arrest rotation of the feed roll and to be exhausted of stored energy at a predetermined position of the feed roll whereupon the uncut segments of web material are efficaciously severed and the leading end of the succeeding web material is automatically positioned where it can be readily grasped by a subsequent user.

Abstract: Toothed perforating rules upon the die roll of the rotary die apparatus form tear strips, punch-outs, 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: The aeration field of an aerator membrane is formed by perforating the membrane with a rotary device having a plurality of perforating tools. The membrane also rotates while it is being perforated, and the membrane and tool simultaneously move in a radial direction, with respect to the membrane, so that a spiral line of perforations results.

Abstract: A stop mechanism for a feed roller associated with a cutter in a dispenser for flexible rolled web material has a stop lever which provides a substantial mechanical advantage. The increased mechanical advantage permits the vacuum cups of a vacuum cup timer to be effortlessly and reliably set. The stop lever has a long actuating arm which pivots about a pivot point. The long actuating arm creates a substantial mechanical advantage for setting the vacuum cups in vacuum-gripping engagement. The mechanism advantage greatly enhances the low pull force requirement and smooth operation of the dispenser.

Abstract: A perforating device for punching pores in shrink-wrap film as the film moves along a film path is described. A biasing apparatus is used to bias the film towards a tension-creating apparatus and a microperforator apparatus so that pores can be punched in the film. An embodiment of the invention uses microperforator pin wheels, having a plurality of conically-shaped pins, and gripper wheels connected to a microperforator shaft. A rotary brush is connected to a rotary brush shaft. Shrink-wrap film is threaded between the microperforator shaft and the rotary brush shaft, and then pulled by an operator to wrap a package. The rotary brush biases the film towards the microperforator pin wheels and the gripper wheels, so that the pins on the micoperforator pin wheels puncture the film as it is being pulled. The rotary brush shaft can be adjusted to permit film to be threaded, and to control the size of the pores to be punched into the film.

Abstract: An apparatus for perforating packaging film which includes a cylindrical roller which is rotatable about a longitudinal axis. Bearings are mounted to each end of the roller to facilitate rotation. A number of longitudinal, circumferentially spaced grooves are formed in the outer surface of the roller. Perforation pin holders are removably and adjustably mounted in the grooves. The perforating pins are removably or permanently mounted on the holder.

Abstract: Apparatus for use with paper folding or other machines which applies a line of perforations on the paper sheets at selected locations and for controlled distances while the paper sheet is travelling through the machine.

Abstract: A slit forming apparatus consists essentially of a rotary blade assembly, a rotary backing roller, and pressing projections. The rotary blade assembly contacts with or abuts against a strip-shaped material travelling over the rotary backing roller and then penetrates said material to form slits in it. The backing roller has banks for holding the strip-shaped material pressed by the rotary blade assembly, and also has grooves for receiving the blades of the rotary blade assembly when they penetrate the strip-shaped material. The pressing projections provided at opposite side ends of the assembly prevent the undersired movement of said material in the lateral or longitudinal direction. With this apparatus, substantially defect-free satisfactory slits are formed in the strip-shaped material.

Abstract: A method for providing edge-side tracks of holes in a printing belt for a rotary printing machine with at least one counter pressure cylinder and at least two printing belt cylinders around which the continuous printing belt carrying printing forms or printing pictures is led, with one printing belt cylinder being provided with radial ring of pins in the region of each of its ends, wherein the pins mesh with holes of the edge-side tracks of holes of the printing belt. The printing belt is stretched with a tension corresponding to the tension with which the printing belt is led around the printing belt cylinders in printing operation. Said state of tension is maintained during the punching of the tracks of holes such that the punched holes maintain their circular shape even in the stretched state of the printing belt in a printing machine and that the distance of the spacing of the holes of the tracks of holes exactly corresponds to the spacing of the pins of the radial rings of pins.