Abstract: When blanks for producing (cigarette) packs are made in the region of the packaging machine itself, especially by being severed from a web of material (12), the blank production must be matched to the performance of the packaging machine. For severing blanks (10, 11) from a web of material (12) having stampings, perforations, etc. drawing rollers (25, 26) and conveying rollers (33, 34), on the one hand, and tearing rollers (27, 28 and 35, 36) running at a higher speed, on the other hand are used. The blanks (10, 11) are torn off as a result of the difference in the conveying speed. In the simultaneous processing of two blanks (10, 11), units (23) comprising two blanks (10, 11) are first servered from the web of material (12) and these are then divided into individual blanks (10, 11) which are conveyed further, especially fed to a folding turret (20).

Abstract: In the production of packs, especially hinge-lid packs, from rigid packaging material (thin cardboard), hitherto individual blanks have been supplied in stacks and introduced into the packaging machine in succession. To make the handling of the blanks easier and to increase the storage capacity, the blanks (23) are now connected to one another via residual connections (25) into a continuous web of material (24) wound as a reel (30). Within the packaging machine, the blanks are severed from the web of material (23) in succession, specifically as a result of the elimination of the residual connections, preferably by being torn off. The residual connections (25) are formed in a region of the blanks (23) or in the region of folding tabs of the latter which, in the finished pack (hinge-lid pack), are concealed by other folding tabs, that is to say are on the inside.

Abstract: A perforated web separator for separating a web of paper or forms which include a tractor feed strip. The tractor feed strips provide a plurality of holes that are used to control movement of the web through the separator in order that the web is separated at the desired, predetermined perforations. Sensors count the passage of holes in the tractor feed strips. An interface including analog-digital and digital-analog conversion blocks cooperates with the sensors and a central processing unit to control the perforated web separator. One pair of sensors is provided to transmit and receive horizontally across the moving web to sense a web jam.

Abstract: A machine for providing a collation of a series of forms with partial overlap defined by a predetermined stagger from a continuous web of such forms has; a tractor feed for feeding the web into a separating station; bursting rollers for separating the web along transverse lines; a conveyor for feeding individual forms consecutively to a collation station; a rotatable stop and indexing conveyor for advancing a form at the registration station through a distance of the stagger with respect to the next form to be received at the registration station, whereby each form as it arrives at the registration station is offset from the preceding form by the predetermined stagger; adhesive being applied to the forms to hold them together with said predetermined stagger.

Abstract: Apparatus for selecting and feeding web material (F1, F2, F3) from a plurality of supply bobbins (B1, B2, B3) of web material having different characteristics, comprising a selecting and dispensing device arranged on a slide (7) horizontally movable to and fro with respect to a feeder conveyor (T) which finally feeds the film to the packaging station (P) of the packaging machine. On the slide is mounted an indexing arrangement (13, 18) adapted to selectively bring into operative alignment with the feeding conveyor (T) one draw-and-guide unit (A1, A2, A3) which draws the selected film and delivers it to the feeding conveyor (T). The operative engagement between the draw-and-guide units (A1, A2, A3) is obtained by opening the feeding conveyor (T) which consist of a superposed belts conveyor (101, 201) and pinch rollers (R1, R2) and inserting therebetween the forward portion (118, 218, 318) of the draw-and-guide unit.

Abstract: A connecting rod fracture machine for fracture separating the caps and bodies of integrally formed connecting rod workpieces includes a cryogenic cooling station for embrittling the large ends, a fracture station for fracture separation of the embrittled cap and body portions, a warming station for returning fractured assemblies to ambient temperature and transfer mechanism for moving the workpieces between stations. The fracture station includes separable pilots for receiving the large end bores of the pieces to be fractured, an impact separation ram for rapidly separating the pilots to effect fracture separation and anti-rotation clamp means movable with the respective pilots and requiring linear separating motions of the caps from the connecting rod bodies.

Abstract: Method and apparatus for producing individual stacks of zigzag-folded material from a continuously fed length of material containing cross perforations. A target cross perforation is sensed and halted ahead of the stack being formed. By gripping the material downstream of the target point and reversing the direction of travel of the material, separation at the target point is achieved, after which the completed stack is removed automatically. Continuous feed of material even during stack separation and removal is maintained by provision of an intermediate buffer storage which is drawn down as each stack is being formed.

Abstract: Method and apparatus for automatically separating interfolded sheets from an interfolder into bundles having a predetermined count. Two separator plates are inserted into the stack of sheets at the proper sheet count, defining a bundle. An elevator and one of the separator plates take the bundle away from the discharge area of the interfolders.

Abstract: Apparatus and processes for receiving sheets from a sheet stacker, separating them into bundles, and removing the bundles from the discharge area of the sheet stacking apparatus. The apparatus includes a frame, a rotatable receiving means mounted on the frame, means for separating the bundles of sheets being received, and means for rotating the rotatable receiving means. The receiving means may include a plurality of sheet receiving chambers, each chamber having an elevator which may be lowered in the respective chamber. The apparatus also has means for raising each elevator. The separating means accumulates the sheets being received from the sheet stacker while the receiving means is being rotated.

Abstract: A device for cutting a strip of paper or similar material, i.e. material in a flexible sheet which can be cut or torn easily, said strip having preestablished transverse lines of weakness. The strip is tensioned and then contacted with a blunt edged blade to tear the strip at the line of weakness.

Abstract: The present invention provides an apparatus and method for loading articles into bags formed from a known roll of web material delineated by perforations at desired intervals. The web includes a first and second sheet of material. A sensor detects a perforation line and activates a sheet separator which opens or tears only the first sheet along a perforation line. The second sheet remains intact and preserves the web. A stream of air is directed at the open edge to inflate a bag. The bag is stabilized on a platform while articles are inserted. After articles are loaded, the second sheet is separated so that the bag is removed from the web and can be closed as desired.

Abstract: A bursting machine is provided for separating discrete sheets from a continuous strip of sheets having uniformly spaced perforation lines across the width of the strip. A gauging device with numerical increments in the form of a linear scale is manually compared to the length of the discrete sheets to provide a predetermined number corresponding to a pulse count for entering into a control device through a manually settable device. The control device in turn is operatively connected to an electronic pulse counter. When the leading edge of the strip advances a predetermined increment after passing through a sensing device located downstream in the path of travel with respect to a first pair of feed rollers, a pulse generator attached to the driven first feed roller is actuated to generate pulses for counting to reach the preset number in the pulse counter.

Abstract: Apparatus for forming an assembly of sealed envelopes used as a postal mailer includes a main envelope processing unit for producing envelopes from the envelope-forming continuous sheet, and an intermediate element supply unit exchangably connected with the main envelope processing unit to supply the intermediate element to the main envelope processing unit.

Abstract: The invention relates to a burster apparatus (44) for separating into sheets a continuous form (22) which has transverse weakened lines and which is arranged to be conveyed along a feed path (43) through the apparatus. The apparatus includes a movable burster rod (82) which extends across the feed path, and a clamp member (96) operable to clamp the continuous form (22) with a weakened line aligned with the path of movement of the burster rod. By means of cams (70) and link members (92), the rod (82) is arranged to be moved through the feed path (43) while the form (22) is clamped, the rod being inclined relative to the feed path. During this movement, the rod (82) progressively bursts the form (22) along the aligned weakened line from one edge of the form to the other, thereby effecting a reliable bursting of the form even if the weakened line is improperly formed.

Abstract: A sheet separating apparatus is designed so that tension is applied to a continuous sheet having weakened lines arranged thereon at predetermined distances so that the continuous sheet is separated along the weakened lines. The sheet separating apparatus comprises first and second conveying mechanisms spaced from each other and adapted to transfer the continuous sheet and to increase tension on the continuous sheet along the course of transfer thereof, and a guide roller for maximizing the increased tension at a predetermined position in the continuous sheet, thereby starting separation of the continuous sheet at that portion of each weakened line which corresponds to the predetermined position.

Abstract: An overhead unit used with a printer having a platen for feeding continuous, fan-folded, edge perforated forms. Tractors engage the feed perforations on the forms. The unit automatically bursts the side perforations by the use of flexural members which extract energy from the forms feed and oscillate to burst the side perforations. Bursting of the cross perforations is carried out by a pivotally mounted, lever actuated bar which engages the platen and forms a toggle therewith to engage the successive forms against the platen just below the cross perforations; the toggle being arranged to tighten and increase the clamping force, as the form is pulled away from the platen when bursting the cross perforations. A roller assembly including rollers engaging the outside of the loop on the infeed or upstream side of the platen removes any platen wave due to differential displacement of the forms as they travel with linear motion through the tractors and with rotational motion around the platen.

Abstract: A method and apparatus for manufacturing paper sheets having an appearance of being hand-made, the method comprising the steps of forming watermarks on a continuous web along longitudinal and transverse zones spaced according to the width and length of the paper sheets, drying the continuous web, crushing longitudinal and transverse regions of the dried continuous web within the watermarked longitudinal and transverse zones, respectively, tearing and separating the dried continuous web along the longitudinal and transverse crushed regions, respectively.

Abstract: In a device for severing endless form sets (14) provided with transverse perforations, having a tear-off arrangement (22) of two transport roller pairs (72 and 74) arranged with spacing from one another it is proposed to drive the two transport roller pairs (72 and 74) at the same transport speed until the transverse perforation next to be torn apart has arrived between the two transport roller pairs (72 and 74). Now the drive speed of the forward roller pair (74) is doubled, which results in tearing open of the transverse perforation. The individual layers of the severed set piece are separated from one another by separator strips (30) and can be conveyed each into allocated reception boxes. The tear-off length desired in each case can be inserted manually into a control apparatus or alternatively, in the case of appropriate marking of the endless form set (14) can be read off with the aid of a detector (202).

Abstract: Apparatus and method are provided for producing a compressed, rolled package of resilient foam material, wrapped with a flexible sheet material which is divided into a plurality of sections separated by pre-weakened areas along its length. The flexible sheet material is advanced by an upstream set of clutch-brake nip rolls and a downstream set of drive nip rolls. The two sets of nip rolls are operated in such a manner as to separate a single wrapping sheet from the length of flexible sheet material and to advance the single sheet into contact with the foam piece for feeding to a rolling and compressing packaging apparatus.

Abstract: A method for conveying a web using inner and outer pairs of elongated side jet nozzles employing the Coanda effect to propel the web while preventing undue distortion or folding thereof. Conveying is accomplished by flowing pressurized air through a plurality of apertures formed in the nozzles and attaching air flow to Coanda flow attachment surfaces slanting away from the apertures.

Abstract: Apparatus to burst form sets from continuous business form assemblies along burst lines, and adjustable to varying form set depths. An intermittently operatively cooperating pair of entry rollers and an intermittently operatively cooperating pair of exit rollers are on a frame. A first of the entry rollers is rotatable about a first axis of rotation and revolvable about a first axis of revolution. A first of the exit rollers is rotatable about a second axis of rotation and revolvable about a second axis of revolution. The revolutions of the entry and exit rollers are timed relative to each other and adjustably timed relative to the speed of the continuous business form assemblies. Both pairs of rollers operatively cooperate substantially simultaneously with each other. Both pairs of rollers operatively cooperate while burst lines of the assemblies are between the entry rollers and the exit rollers.

Abstract: Method and device to cut-off a running web of tearable material and to feed an end of the web to a reel around which the web is to be wound and supported respectively. The web of material is at the center portion of the web perforated by means of a cutting apparatus provided with a point. The cutting apparatus is moved at a speed which is lower than the speed of the feed of the web material, so that the web of material during its continued forward feed is torn apart from the area of the perforation in a direction to the two respective lateral edges of the web of material. The free end of the web of material thus being cut-off is guided by the cutting apparatus, so that it is introduced between the reel and the portion of the web of material which runs to the reel.

Abstract: A system for conveying a web using inner and outer pairs of elongated side jet nozzles employing the Coanda effect to propel the web while preventing undue distortion or folding thereof.

Abstract: An apparatus for separating perforated paper tube sections coming from a paper tube machine consists of a plurality of endless conveyor belts which are disposed above and below the moving paper tube sections. Each conveyor is associated with a plurality of rollers, the rollers above the paper tube section being displaced in relation to those below the paper tube sections. The driving elements for the conveyor belts are located at fixed positions, and to effect separation of the perforated tube sections, the rollers are moved relative to one another for a brief time interval in a direction transverse to the direction of transport of the paper tube sections.

Abstract: There is provided a method for making a supply of partially separated multibag units, comprising first passing a perforated chain of side-sealed bags through a first set of driven nip rollers, then passing said chain directly to a second set of nip rollers having a partial nip of selected width less than the width of said chain, while driving said second nip rollers at a speed greater than said first nip rollers sufficient to partially separate the bags at their respective lines of perforation, and while cyclically completing the nip of said second nip rollers at predetermined intervals corresponding to the number of bags desired in each multibag unit. Associated apparatus for making said partially separated multibag units is also provided.

Abstract: A burster including spaced infeed and outfeed pairs of rollers in fixed spacial relationship with respect to each other which are driven by a system including a variable, limited lost motion connection to the infeed rollers. The connection includes a long-lived tooth and stop assembly wherein impacting surfaces of the tooth and the stop members are configured to minimize shear stresses occurring in the tangential direction in favor of readily absorbed radial stresses to thereby provide a long-lived apparatus.

Abstract: A feeder tray for feeding a continuous form into a friction feed folding machine. A continuous form, which is typically a printout generated by a computer's printer, is pulled through a pair of tensioning rollers mounted on the feeder tray. The continuous form exits the tensioning rollers and is fed between a friction wheel and idler wheel. Upon exiting the friction wheel the form is engaged by a pair of stripper wheels which are rotating at a much higher rate than the friction wheel or tension rollers. The sudden increase in lineal speed imparted to the continuous form by the stripper wheels causes the form to burst at a perforation. The bursting operation is repeated at each perforation to reduce the continuous form to a plurality of singular sheets.

Abstract: A bursting apparatus for separating sheets in a continuous intermittently perforated form web is disclosed. The apparatus includes a feed roller, a burst roller and a bursting device, said bursting device disposed between said feed roller and said burst roller and comprising two horizontally positioned cone sections wherein their base portions are adjacent to each other and are encircled at least in part by a bursting ring, said bursting ring having a portion extending beyond said cone base portions in at least a portion of its outer periphery.

Abstract: The invention relates to a method and apparatus for partitioning and/or shaping a batt by gripping the batt with resilient means or, alternatively, with resilient means and non-resilient means, and by stressing or severing the batt without the formation of compaction areas on the parted edges of the batt.

Abstract: An apparatus for automatic bursting of perforated continuous forms is disclosed. The apparatus comprises first and second feeder means which may comprise two pairs of rotating rollers with tensioning means being provided by rotating the roller pairs at a slight speed differential. The apparatus also includes releasing means for intermittently releasing the feeding action of the first feeder means or roller pair. The releasing means may be provided by a flat area on the surface of one of the low speed rollers for releasing the nip in the low speed rollers to allow the forms to slip and uncrinkle. The apparatus also includes first and second forms separation means which cooperate with perforations in the forms to separate the forms, the first separation means acting when no immediately preceding forms slippage has occurred and the second separation means acting when immediately preceding forms slippage has occurred.

Abstract: An improvement in a machine for longitudinally separating portions of a continuous web of paper has a triangularly shaped breaking element engaging the under side of the web with spaced apart breaking triangles for ripping the paper along perforation lines and accommodating intermittant longitudinal web displacement.

Abstract: A label printer for printing both human readable and machine readable indicia on the end label in a strip of perforated label stock includes a drum printer providing printing at a print station and label advancing rollers for advancing the label stock from a supply through the print station. Human readable indicia are printed on the end label during this advancement. Label tensioning rollers are provided on the opposite side of the print station from the label advancing rollers and engage the end label after a portion of the label has been transported past the print station. When the label tensioning rollers have engaged the end label, the machine readable indicia are printed on the label, as well as any additional human readable indica. The label tensioning rollers provide for tensioning of the label during printing of the machine readable indicia so as to enhance the resolution of the printed indicia.

Abstract: Preprinted cards, coupons, and the like are attached at spaced locations to a high speed moving web by an applicator drum. An assembly is moveable as a unit relative to a frame in a direction toward and away from the applicator drum. The assembly includes a feed roll for feeding a web in the form of a strip of connected cards, a motor for driving said feed roll, a burst wheel, a glue applicator, and a guide for guiding the strip of cards.

Abstract: An apparatus for dividing strip material, in particular strip-shaped scrap resulting from edge-trimming of rolled strip and metal sheet, comprises at least one pair of mutually co-operating cutters (18, 18a), between which the strip material (14) is fed and which are arranged to penetrate the strip material from mutually opposite sides. The two cutters in each co-operating pair are mutually substantially parallel at the moment of their penetration into the strip material. The one cutter (18) in each pair is arranged to engage the strip material slightly in front of the second cutter (18a), as seen in the direction of movement of the strip material, and then to move away from the second cutter in the direction of movement of the strip material, such that the part of strip material located in front of the cutters is separated from the remainder of the strip material by a combined cutting and tearing operation.

Abstract: An apparatus for making paper clips which includes cutting predetermined lengths of wire by advancing a continuous wire at a predetermined speed to a cutting station. The cutting station includes knife means with the knife having a cutting blade edge for penetrating the wire. Delivery means to engage the wire are provided along the path downstream of the cutting station for advancing the wire into a receiving slot. The receiving slot is provided with a deflecting member at an acute angle to the path of the wire and a magnet. The cut wire is then lifted out of the slot by an elevator platform means, and the wire is engaged by a ramming plate associated with three spindles, each spindle adapted to pass through a respective die member and the die member having spiral bending edges for bending the cut wire about the respective spindles for forming the paper clip.

Abstract: An improved machine and apparatus are disclosed for assisting in decollating or separating the separable parts of a multi-part, carbonless, manifold, continuous web business forms assembly having integral "locks" incorporated therein that are utilized to hold the parts of the continuous web business forms assembly in alignment when the continuous web business forms assembly is used on high speed printing device. The improved machine has a plurality of decollating stations arranged in series, and each station includes a refold roller. The part of the continuous web business forms assembly being separated at a decollating station passes about and contacts the refold roller.

Abstract: Apparatus for separating successive sections of a running web wherein neighboring sections are connected to each other by weakened (e.g., perforated) web portions has a first and a second web driving unit. The second unit is located behind the first unit, as considered in the direction of transport of the web, and its speed is reduced below the speed of the first unit (and/or the speed of the first unit is increased above that of the second unit) when a weakened portion is located between the two units. This results in automatic separation of the preceding section because the tensional stress upon the weakened portion behind the preceding section suffices to destroy such weakened portion. The weakened portions are monitored by a detector which transmits short-lasting signals to change the speed of the first and/or second unit when a weakened portion advances beyond the second unit but is yet to reach the first unit. When a separating step is completed, the speed of the two units is again the same.

Abstract: A stationery burster having substantially abutting, rotatably mounted, first and second infeed rolls, substantially abutting, rotatably mounted first and second outfeed rolls spaced from the infeed rolls along a path of stationery travel and a relief in the peripheral surface of the first infeed roll. A rotatable drive is provided for the second infeed and second outfeed rolls such that the peripheral speed of the second outfeed roll with be greater than that of the second infeed roll. The first rolls in each set are idler rolls. The spacing between the infeed and outfeed rolls may be adjusted to accommodate stationery of differing form lengths.

Abstract: A bursting apparatus for separating one or two continuous webs of material along transverse lines of weakening thereon. The material is fed through two pairs of rollers driven by suitable driving apparatus. Magnetic clutch and magnetic brake assemblies halt rotation of one pair of rollers upstream the transverse line of weakening, while the other pair of rollers continues to grip and feed the material. The resultant longitudinal tension along the material promotes rupture at the transverse line of weakening. A breaker roller mounted between the two pairs of rollers has axially mounted spheres to promote discrete points of increased tension along the transverse line of weakening. The bursting operation is repetitive and continuous. Separated sheets are successively transported or stacked after passing through the rollers.

Abstract: An improvement in continuous-rod making machines comprises a rod-breaking mechanism, particularly for a composite filter rod, which has spaced grippers for gripping the rod and accelerating it in a generally lengthwise direction. In a preferred construction a pivoted segment carries the grippers and cam means is provided for moving the grippers together as the segment is itself moved. The segment may carry a deflector for directing the rod to waste and means may be provided for releasing the leading part of the rod after it has been broken. The new leading end of the rod on a conveyor band passes to a rod-receiving member, which may be the entry to a rod cut-off mechanism or rod-measuring device.

Abstract: A burster for separating successive sheets of paper from a continuous web of paper has at least one output or draw roller having a larger diameter than the input or feed rollers with all of these rollers rotated at the same r.p.m. and a simple belt drive mounted on a pivotal double link with a one-to-one ratio provides for driving one set of rollers from the other set with an adjustable distance between sets of rollers.

Abstract: A cutting device for cutting sheets of material wherein a cutting member co-operates with a bed of upstanding pins which support the sheet. Although the cutting member may be a knife, it is preferably composed of a line of upstanding pins which are sufficiently long to penetrate through the material to be cut and to enter the bed of upstanding pins. The cutting device may comprise two drums mounted for rotation in opposite senses about parallel axes, one drum carrying the cutting member and the other the bed of pins, the tips of the pins being aligned with the cylindrical surface of their associated drum.

Abstract: Apparatus for successively fabricating and assembling multi-cell partitions, having a plurality of intermeshing transverse and longitudinal partition strips for use in cartons, crates and the like, is characterized by providing for continuous movement of the partition strips, assembly of the partition strips in a collapsed condition, and adjustability of the apparatus for fabrication and assembly of varying sizes and types of partitions to provide desired speed and versatility for commercial operation.

Abstract: The present invention relates to a method wherein seedlings, raised in a paper tube assembly connected together by means of connecting portions having a separating line forming the separation course in each, are continuously pulled out while separating the tubes one by one and planting them in the field. In the separation of seedling tubes, a transplanter is provided with rollers for pulling out continuous seedling tubes and other rollers for separating the pulled out seedling tubes into individual seedling tubes. The latter has a faster rotating speed than that of the former and has a cone-like shape or is mounted so as to incline with respect to the former, thereby separating paper tubes into individual pot bodies at the connecting portions, one by one, while moving the separation acting points progressively. The separating-line in each connecting portion has an unjoined separation-guiding-portion extending from one end to 20-70% of the height of the connecting portion.

Abstract: A device for separating multi-layered strips of paper having carbon paper provided therebetween. The separating device cooperates with the transversely located perforations in the continuous strip to drive the continuous strip through the separating device. The continuous strip also has transversely extending serrations therein which are severed in the separating device so that the continuous strip is separated into individual sheets. Each station in the separating device has a pair of inlet rollers and a pair of outlet rollers with the outlet rollers being driven at a speed which is greater than the speed of the inlet rollers so that the continuous strip is effectively pulled so that the transversely extending serrations will become severed and the individual sheets will be collected at an outlet.

Abstract: A method and apparatus for separating a continuous stream of connected business forms into exact count zig-zag folded stacks wherein nip forming rolls are selectively engaged to burst the web stream at a predetermined point and prior to zig-zag folding.

Abstract: Bursting apparatus for continuous forms having modular guiding, trimming, bursting, and decollating units. A folding forms tray is provided to hold forms to be burst. Paper feeding and guiding is accomplished by the use of laterally adjustable curved, flanged guide means coacting with spring loaded hold-downs. Margin trim cutters and a center slitter are also provided. Forms width and margin trim adjustments are readily accomplished through the use of novel leaf-spring clamping means coacting with transverse guiding means.The bursting unit has fixed high speed rollers and movable low speed rollers with a bursting blade having plural arcuately shaped bursting areas attached thereto. The low speed rollers are mounted on a movable carriage which is adjustably spaced from the fixed high speed rollers by means of two parallel threaded rods.

Abstract: Sheet handling apparatus including burster apparatus for separating continuous form webs into sheets and for feeding the just-burst sheets along a sheet path to a stacker mechanism where the sheets are stacked on end in the same order they were in the web. A plurality of feeding means is spaced along the sheet path and these feeding means are selectively actuated to feed any size sheet and as the sheets are fed along the sheet path, each sheet can be selectively laterally offset to a plurality of laterally separated positions to facilitate the separation of the sheets into sets of copies, data sets or jobs.

Abstract: A labeling machine has a plurality of successive stations whereby a rotating pickup member on a revolving carrier picks up a label at one station, carries the label to a glue applicator station and transfers it to a gripping cylinder at another station. The invention provides a drum at the label supply station which rotates with the carrier and contacts the pickup member. A strip of labels passes about the drum into the nip between drum and pickup member and means, such as a steep helical thread and follower, are provided to speed up the pickup member so as to tear off the foremost label from the rest of the strip. Knives can be positioned inside the drum and cams and/or stops provided to project the knives out through slits in the drum so as to pre-score or perforate the label strip to facilitate tearing.

Abstract: A simplified burster mechanism for perforated forms is provided wherein the burster can be adjusted to separate forms of different sizes in a simplified manner.