MXPA99001088A - Apparatus and method for selectively making longitudinal perforations on web materials - Google Patents

Abstract

A web (11) perforating apparatus (10) comprising:a first and second perforator wheels (21, 22) mounted on stationary axes (26, 27) and spaced from each other along a predetermined path and in alignment with each other;first and second anvil cylinders (44, 45) spaced from each other along the path for cooperation with the wheels (21, 22) each cylinder having a raised (37) and a depressed portion (34), and a movable axis (35, 36). The cylinders are rotated about the axes (35, 36) synchronously with the web movement, and the cylinders (44, 45) may be selectively moved toward and away from the perforator wheels (21, 22).

Description

APPARATUS AND METHOD FOR SELECTIVELY PERFORATING LONGITUDINAL MACHINERY IN FRAME BACKGROUND AND SUMMARY OF THE INVENTION The invention relates to a method and apparatus for producing sautéed perforations of exact length in constant and exact register with a processed paper web, on demand, from external signals. (typically from a computer controller). While there is a significant body of prior art relating to what is commonly known in the industry as "fast jump" or "jump" drilling, where perforations are selectively applied to portions of a movement frame (typically a pattern of shapes). of business), there is a lack of prior art that provides accurate accuracy of the drilling action in combination with on-demand control. There are two basic principles of drilling apparatus in the prior art. The first is already an anvil interrupted / of partial dimensioning, circumferentially displaced or drilling wheel that coactuates against and to a wheel of perforation of complete circumference or cylinder of anvil. The second is a cam-operated rotary operating wheel that operates against a hardened anvil cylinder. The cam operated device can be easily adapted to print on demand, however cam operated devices are usually significantly limited in speed, and tend to wear out prematurely due to impact forces. Also, the 5 exact on / off locations for the perforations are extremely difficult to obtain using that system. Therefore, according to the present invention, an anvil / drilling wheel system is used, which is configured and operated in a novel form 10B to obtain jump bores with exact length in constant and exact register with a frame paper that is processed on demand from external signals, with long duration. The apparatus and method according to the invention are also relatively simple to build and use. In accordance with one aspect with the present invention, an apparatus is provided for weft perforation in the form of an accurate record on demand comprising the following components: Means for moving a shape frame in a predetermined path in a first direction. First and second drilling wheels of substantially continuous circumferential circumference, mounted on substantially stationary axes, spaced apart from each other on the predetermined path and in line with each other on the path of the first direction. The first and second anvil cylinders spaced apart from each other on the predetermined path, each comprising: an interrupted circumference including a raised circumferential portion and a depressed or depressed circumferential portion; and a moving axis with respect to which the cylinder rotates. Means for rotating the anvil cylinders relative to the axes synchronously with the frame movement means and means for selectively moving each of the axes of the anvil cylinders towards and away from the perforated wheels from a first position wherein all the circumference of the anvil cylinder is spaced from the weft and does not cooperate with a drilling wheel, to a second position wherein the elevated portion in the anvil cylinder can couple the weft and cooperate with a drilling wheel to effect substantially parallel perforation of the weft to the first address. The shape frame typically comprises a plurality of business forms, each having a predetermined length x on the predetermined trajectory and each of the perforating wheels having a circumferential point closer to an anvil cylinder, the circumferential points are spaced apart from each other. yes on the predetermined trajectory a distance yx, where y is a positive integer number (typically 1 or 2).

The raised portion of each anvil cylinder and an imaginary continuation thereof on the depressed portion typically have a circumference of 2x. The selective movement means may comprise any conventional apparatus for moving the cylinders in operative association with the drilling wheels while not interfering with the displacement of the cylinders. Preferably, the selectively movable means moves the cylinders towards the drilling wheels, such that the center lines of the anvil cylinders and the center lines of the drilling wheels are aligned and are perpendicular to the frame in the second position. In the preferred embodiment of the invention, the anvil cylinders are mounted in eccentric bearing housings, and the displacement means selectively move the axes of the anvil cylinders towards and away from the drilling wheels by rotating the eccentric bearing housings in a manner such that the eccentric rotation of the bearing housings makes movement between the first and second positions. The means for rotating the eccentric bearing housings can comprise any conventional structure capable of performing that function, such as a linear actuator (such as a high-performance air cylinder connected by crank arm to the housing), or a rotary actuator, motor of steps, or servomotor, the latter two particularly for higher speed operations. Typically, the means for rotating the eccentric bearing housings rotate the housing between about 15 and 25 ° (preferably about 20 °) between the first and second positions and obtain a spacing between the drilling wheel and the elevated position of the uninterrupted anvil cylinder , when in the first position, approximately .178 mm (0.007 inch). The means for moving the weft pattern in a predetermined path in a first direction can comprise any conventional weft moving mechanism, such as energized displacement rollers, picking cylinders or arrows or the like. In the preferred embodiment according to the invention, the weft moving means includes at least first, second and third guide rollers, anchor cylinders located between the first and third guide rollers in the predetermined path and a second guide roller located between the second cylinders in the predetermined trajectory. The guide rollers can be positioned with respect to the perforating wheels in such a way that the weft is substantially tangent to the perforating wheels when they couple the guide rollers. Since the drilling wheels are not displaced, but rather are intermediate wheels, no drilling action is carried out unless the raised portion of the anvil cylinder engages the opposite surface of the screen from the drilling wheel. A first plane passes between the centers of the first and third guide rollers, which are parallel to a second plane passing between the axes of the perforating wheels and the first and second planes are spaced a first distance- A third plane passing through the The center of the second roller parallel to the first plane is spaced from the second plane a second distance which is less than the first distance, ie in such a way that the predetermined path has a slightly V-shape in the perforation area. The axes of the drilling cylinders are substantially stationary - but they can be adjusted to allow minor adjustment of the positions of the drilling wheels with respect to the predetermined path and thus provide adjustment of the wheel pressure. Another drilling wheel may be mounted on a common axis, with each of the first and second wheels spaced apart from the first and second wheels in a second direction, substantially transverse to the first direction.

According to another aspect of the present invention, there is provided an apparatus for piercing a shape frame, comprising the following components: a predetermined trajectory of movement of a shape frame. A drilling wheel of substantially continuous, rotatable circumference mounted on a substantially stationary axis on a first side of the predetermined path. An anvil cylinder comprising: an interrupted circumference including a raised portion and a depressed or depressed portion; and a movable shaft with respect to which the cylinder rotates, the anvil cylinder is mounted in an eccentric bearing housing and the movable shaft disposed on a second side of the predetermined path opposite the first side. Means for rotating cylinders anvil about the axis. And means for selectively moving the axis of the anvil cylinder towards and away from the drilling wheel from a first position wherein all the circumference of the anvil cylinder is spaced from the predetermined path and does not cooperate with the drilling wheel, to a second position wherein the elevated portion of the circumference of the anvil cylinder can intercept the predetermined trajectory and couple a web that moves in the path and cooperates with the perforating wheel, to effect perforation of the web parallel to the first direction, the selectively mobile means comprise means for turning the eccentric bearing housings, in such a way that the eccentric rotation of the bearing housings move between the first and second positions. The details of the means for rotating the eccentric bearing housings and the like, preferably are as previously described for the first aspect of the invention. According to another aspect of the present invention, a method for perforating a pattern of business forms, using first and second drilling wheels of substantially continuous circumference, operatively spaced from each other on a predetermined weft trajectory and first and second anvil cylinders as well. operatively spaced from each other on the weft path and each having a raised circumferential portion and an oppressed circumferential portion, the raised portions are provided cooperate with the perforating wheels to perforate the weft, the preferred method comprises the following the following steps : (a) Moving the web in a first direction over the predetermined web path, (b) Automatically selectively moving the anvil cylinders from a first position where the circumferential portion of the anvil cylinders does not engage, to a second position where the girth portions The elevations of the cylinders can couple the weft and cooperate with the perforating wheels to make perforation of the weft parallel to the first direction, (c) To rotate the anvil cylinders in such a way that a point on its circumference moves tangentially in the first direction Synchronously with the movement of the plot in the first direction. AND (d) selectively moving the anvil cylinders from the second position to the first position. The wheels and cylinders are typically spaced apart from each other on the predetermined path, a distance yx, where x is the length of a shape of the weft on a predetermined path e and is the positive integer and the circumference of each of the raised portions of the anvil cylinder and an imaginary extension that superimposes the depressed portions is equal to 2x; and then steps (a) - (d) are practiced to drill each even shape in the weft with the first cylinder wheel and drill each non-weft shape with the second cylinder wheel. Stages (b) and (d) are preferably practiced to move the center line of each anvil cylinder and the centerline of its perforating wheel associated in alignment and substantially perpendicular to the frame; and in response to electrical signals from a computer control (such as a "Moore XL Data System", available from Moore U.S.A., Inc. of Lake Forest, Illinois). It is the primary objective of the present invention to provide exact length jump perforations effective in constant and exact registration with a processed paper web, on demand from external signals and with a long useful service life of the components used. These and other objects of the invention will be clear from an inspection of the detailed description of the invention and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic side view of an apparatus for weft perforation for forms with exact registration upon exemplary demand, in accordance with the present invention; Figure 2 is an enlarged view in detail of a portion of the drill wheel circumference used with the apparatus of Figure 1; Figure 3 is a schematic side detail view showing an anvil cylinder and drilling wheel of the apparatus of Figure 1 cooperating to effect perforation of a frame; Figure 4 is a schematic top plan view showing operation of the apparatus of Figure 1, to make perforations in a weft parallel to the direction of movement of the weft; and Figure 5 is a control schematic for the apparatus of Figure 1. DETAILED DESCRIPTION OF THE DRAWINGS An exemplary embodiment of an apparatus for shape frame drilling with accurate registration on demand in accordance with the present invention, is generally illustrated by reference number 10 in Figure 1. The apparatus 10 includes means for moving a paper web of business forms, 11, in a predetermined path (illustrated by the thick line for the frame 11 in Figure 1) generally in a first direction 12. The means for moving the weft can comprise any conventional weft displacement components, such as displacement rollers, collection cylinders or arrows, tractor displacement apparatus or the like. For example, Figures 1 and 5 schematically illustrate a conventional tractor pick-up and movement apparatus 13, energized by an electric motor 14 (see Figure 5). The weft moving means also preferably include at least first, second and third guide rollers 15, 16 and 17 respectively (see Figures 1 and 4) which are spaced apart in the direction 12 and have substantially parallel axes of rotation 18 a 20, respectively. Typically, the predetermined path of the web 11 between the guide rollers 15, 17 is substantially linear, but may have a slight V-shape, as illustrated in Figure 1. That is, if the axes 18 to 20 are substantially horizontal, the axes 18, 20 are essentially at the same height while the axle 19 is slightly higher. The apparatus 10 nothing else comprises first and second drilling wheels of substantially continuous circumferential circumference 21, 22. The circumference 23 of each of the wheels 21,22 is substantially continuous, since there are no large discontinuities. However, because the drilling wheels 21, 22 are conventional drilling wheels, they have a profiled surface as illustrated by the tapered peaks 24 and valleys 25, schematically illustrated in Figure 2. The relative lengths of the peaks 24 and valleys 25 and the number of peaks and valleys that are provided per centimeter can be adjusted depending on what type of perforations (eg, standard perforations, micro perforations or the like) will be provided in the frame 11. The perforating wheels 21, 22, are mounted on shafts substantially stationary 26, 27, spaced apart from each other on the predetermined path running through the frame 11, and in alignment with each other on the path in the first direction 12 as illustrated in Figure 1. The wheels 21, 22 are on the opposite side of the trajectory from the guide rollers 15 to 17. In the embodiment shown in Figure 1, a plane passing through the axes 18, 20 is parallel to a plane passing through axes 26, 27; and a plane passing through axis 19, parallel to the planes between axes 18, 20 and 26, 27, respectively, is closer to the plane passing through axes 26, 27, than the plane passing to through the axes 18, 20. The drilling wheels 21, 22 do not move unless they are intermediate wheels. The axes 26, 27 are substantially stationary since there is no predetermined movement intended, especially during operation of the apparatus 10. However, it is desired that the positions of the axes 26, 27, be slightly adjustable in order to provide wheel pressure adjustment. Figure 3 illustrates schematically an adjustment mechanism 29, which allows adjustment in the dimension 30 towards and away from the frame 11. Also, the axial position (this is on the axis 26 or axis 27) of the wheels 21, 22, also may be provided by the adjustment mechanism 29. The adjustment mechanism 29 may be any conventional adjustment mechanism for performing these purposes, such as the drilling wheel support manufactured by EMT Corporation of Green Bay, Wisconsin. The apparatus 10 may also comprise first and second anvil cylinders 31, 32 also spaced apart from each other on the predetermined trajectory of the weft 11 and for cooperation with the wheels 21, 22, respectively. Each of the cylinders 31, 32 includes a raised circumferential portion 33, and a depressed or depressed circumferential portion 34. The anvil cylinders 31, 32 may include conventional interrupted anvil cover anvil segments (commonly known as Kidder technology) of such that the circumferential extension of the raised portions 33 can be adjusted. In the preferred embodiment illustrated in the drawings, each raised surface 33 is continuous and extends approximately 180 ° around the circumference of the cylinders 31, 32, while the depressed portion 34 is also continuous and extends approximately 180 °. The anvil cylinders 31, 32 themselves are conventional and can be of any construction that cooperates adequately with a drilling wheel 21, 22 - as schematically illustrated in Figure 3 - to effect perforation of the paper web 11, in one dimension parallel to the first address 12.

The cylinders 31, 32 rotate with respect to moving axes 35, 36 respectively (see Figures 1 and 5) and move with respect to the axes 35, 36 - as indicated by the directional arrows 37 in Figures 1, 3 and 5 - - in synchrony with the movement of the frame 11 in the direction 12. That is, tangent to the circumference of the cylinder 31, 32, at the point where the drilling is carried out (see Figure 3) is in line with the trajectory of the movement of the frame and generally in the direction 12. A synchronous energized rotation of the cylinders 31, 32 with respect to the axes / arrows 35, 36, can be achieved in any convenient way such as by using gears - illustrated schematically at 38 and 39 in Figure 5 - energized by the same motor 14 that turns on the collector 13 ( or another frame movement device). That is, the motor 14, the collector 13, and the gears 38, 39 can be moved by a synchronous arrow illustrated schematically at 40 in Figure 5, to ensure that the cylinders 31, 32 and the frame 11 move in register or correspondence Exact The apparatus 10 also comprises means for selectively moving each of the shafts 35, 36 of the cylinders 31, 32 towards and away from the drilling wheels 21, 22 from a first position - illustrated by dotted line 41 in Figure 1 - - wherein the entire circumference of the anvil cylinder 31, 32 is separated from the web 11 and does not cooperate with the drilling wheel 21, 22 to a second position - illustrated with solid lines in Figures 1 and 3, including the centerline of shaft 42 shown in Figure 1 - wherein the raised portions 33 of the anvil cylinders 31, 32, engage the weft 11 (but the portions 34 do not) during rotation, and cooperate with a drilling wheel 21, 22 (as illustrated) in Figure 3) to effect perforation of the weft 11, substantially parallel to the first direction 12. The means for effectively moving the spindles 35, 36 can comprise any conventional device that is capable of performing that function. In the preferred embodiment schematically illustrated in the drawings, the selective movement means comprise eccentric bearing housings 44, 45. The preferred geometry of the bearing housings 44, 45, is such that the axial center lines of the drilling wheels, illustrated in FIG. 46 in Figure 1, at the high point of the bearing housing eccentric (the center line of the anvil cylinder) is indicated by the lines 42 in Figure 1, and the center line of the outer diameter of the housing 44, 45 (such as a frame perforation 47) all are in line when in the operative position as illustrated in Figure 1. That is, the selective movement means move the cylinders 31, 32 towards the drilling wheels 21, 22, in such a way that the center line 47 of the anvil cylinders and the center lines 46 of the drilling wheels 21, 22, are aligned, and are substantially perpendicular to the frame 11 in the second position. This geometry negates any excessive travel or deviation impact (relating to drive) thus allowing for faster operating speeds and longer duration of the drilling wheel 21, 22. The selective movement means also comprise means for rotating the eccentric bearing housing 44, 45, such that the eccentric rotation of the housings 44, 45 effects movement between the first and second positions. The means for rotating the bearing housings can comprise -, associated with each of the cylinders 31, 32 (although only such a structure is illustrated in Figure 1 - associated with the cylinder 31), a linear actuator 50 connected by a crank arm 51 to the housing 44 (for example an extension 52 of the housing 44). The crank arm 51 is pivoted at 53 to the linear actuator 50, and at 54 to the bearing housing extension 52. The elongation or retraction in the dimension indicated by the arrows 55 in Figure 1, the housing 44 rotates from the solid line position of the extension 52 illustrated in Figure 1, to the dotted line illustrated position of the extension 52 illustrated in Figure 1, the angle of rotation is x illustrated in Figure 1. In the preferred embodiment the angle a is between about 15 to 25 °, preferably about 20 °. The linear actuator 50 may be an air cylinder high performance, or any other conventional linear actuator, or other actuator may be used, such as a conventional rotary actuator, a stepper motor or a servo conventional engine, the last two to operation at top speed. The details of the assemblies of the eccentric housings 44, 45 and their cooperation with the units for the arrows / shafts 35, 36 can vary widely, and any suitable structures can be provided for this purpose. For example, the eccentric housings 44, 45, may be contained in side racks adapted with roller bearings or needle to facilitate quick operation on and off (when operation is required at high speed - this is when the frame 11 moves to high speed, for example more than 61 m / minute (200 feet / min)). The rotary motion for the operation activated and deactivated hosts on eccentric bearing is synchronized from side to side by an arrow synchronization, illustrated schematically at 54 in Figure 1, and also coupled with bearings antifriction which are contained in the side frames. Antifriction joints or links or gears and pinions can be used to transmit rotary motion required synchronization from arrow 54 to the eccentric housings 44, 45. Figure 5 illustrates schematically a control apparatus 10. The control system includes preferably - - as illustrated at 57 in Figure 5 - a Moore Conventional XL Data System, available from Moore U.S.A., Inc. of Lake Forest, Illinois. The XL 57 data system provides two delay signals separately (momentary), one (n) for page locations with even number (for example, unit 32, 22 in Figure 1) and one (n + l) for page locations with number non (for example, unit 21, 31 in Figure 1). The phase angle of the two individual units will then determine which unit drives (that is, if the upstream unit 22, 32 is out of phase to drill a signal n will not drive the unit, however the downstream unit 21, 31 will be in phase a later form, when the signal is received n + l and vice versa). Each individual unit (22, 32 or 21, 31) is activated by 180 ° of rotation.

Figure 4 - in association with Figure 1 - shows the most exemplary operation of the apparatus 10 according to the invention for drilling the frame 11. As seen in Figure 4 the frame 11 includes a plurality of business forms for example , the consecutive forms 58 to 61 illustrated in Figure 4, each of the shapes is typically separated from the others by a transverse line of weakness 62, such as a line of perforations. Each of the shapes has a predetermined length x on the predetermined trajectory of the frame 11. Each of the perforating wheels 21, 22 has a circumferential point (the exact part of the wheel comprising that point which changes as the wheel rotates during the drilling action) as seen at 63 and 64 in Figure 1, closest to the associated anvil cylinder 31, 32, where the current drilling is carried out. As seen in both Figures 1 and 4, the circumferential points 63, 64 are spaced apart from each other on the predetermined path of the frame 11, a distance yx, where y is a positive integer. In the mode currently illustrated in Figures 1 and 4, y = 1 but depending on the circumstances, and can be equal to 2, 3 or almost any other reasonable positive integer. With this particular construction, the raised portion 33 of each of the anvil cylinders 31, 32 and an imaginary continuation (illustrated by the dotted line 65 in Figure 1) above the depression point 34, has a circumference of 2x. In this way consecutive shapes will be drilled by the different units 21, 31 and 22, 32. This is illustrated in Figure 4, where as the frame 11 is energized in the direction 12, a line of perforations 66 is formed in the frame 59 by the wheel 21 and the cylinder 31, while the perforation 67 is formed in the form 60 by the wheel 22 and the cylinder 32. Figure 4 also illustrates various other modifications that may be provided according to the invention. For example, Figure 4 illustrates conventional tractor displacement openings 68, which cooperate with conventional tractor displacement systems such as the harvester 13. Figure 4 also illustrates another perforated wheel 71, 72 mounted on a common shaft 26, 27, respectively with each of the wheels 21, 22, respectively and the wheels 21, 22 spaced a second direction 73 (substantially parallel to the lines of weakness 62) substantially transverse to the first direction 12. In this way, the perforation lines 66 , 66 'and 67, 67', respectively, can be formed at the same time by the wheels 21, 71, and 22, 72, respectively.

By practicing the method of the invention, the weft 11 moves in the direction 12 over the predetermined trajectory illustrated in Figure 1, and by using the XL Data System 57 which controls the actuators 50, the anvil cylinders 31, 32 can - -on-demand-move in an automatically selective manner between the position a, wherein no circumferential portion of the anvil cylinders 31, 32 can couple the frame 11, to a second position where the raised circumferential portions 33 of the cylinders 31, 32 can couple the weft 11 (as seen in Figure 3) during rotation and cooperate with the perforating wheels 21, 22 to move those wheels and to perforate the weft 11 parallel to the first direction 12. The anvil cylinders 31, 32, are rotated by the motor 14 and associated displacement components, such that a point on its circumference moves tangentially in the first direction 12 in synchrony with the movement of the frame 11 in the first direction 12, as illustrated in FIG. Figure 3. The method also comprises automatically moving the anvil cylinders 31, 32 from a second position to the first position when the demand perforation is no longer required, in the first position, typically there is an approximate spacing of. 178 mm (.007 inch) between the weft 11 and the drilling wheels 21, 22 and the raised portions 33. The rotary means 50 preferably are controlled independently even though and synchronous by the XL Data System 57 and the drilling pressure is in no way adjusted by the movement of the cylinders 31, 32 by rotation of the eccentric housings 44, 45, such that the axes / arrows move between the positions 31, 42 illustrated in Figure 1. On the contrary, the wheel pressure is adjusted only by the adjusting mechanism 29 to adjust the position of the wheels 21, 22. In this way it will be seen that according to the present invention , an advantageous method and apparatus have been provided to produce accurate length jump perforations in constant and accurate registration with a processed paper web, upon demand from external signals. While the invention herein has been shown and described in what is currently conceived as the most practical and preferred embodiment thereof, it will be apparent to those of ordinary skill in the art that many modifications may be practiced within the scope of the invention, this The wider scope of the appended claims should be granted to cover all equivalent structures and methods.

Claims (20)

1. CLAIMS 1. An apparatus for plot perforation in the form of an exact record on demand, characterized in that it comprises: means for moving a pattern of forms in a predetermined path in a first direction; first and second drilling wheels of substantially continuous circumferential circumference, mounted on stationary axes substantially spaced apart from each other on the predetermined path and in alignment with each other on the path in the first direction; first and second anvil cylinders spaced apart from each other on the predetermined path, each comprising: an interrupted circumference including a raised circumferential portion and the depressed circumferential portion, and a movable axis with respect to which the cylinder rotates; means for rotating the anvil cylinders relative to the axes in a synchronous manner with the frame moving means; and means for selectively moving each of the axes of the anvil cylinders towards and away from the drilling wheels from a first position wherein the entire circumference of the anvil cylinder separates from the web and does not cooperate with the drilling wheel, to a second position wherein the elevated circumference portion of the anvil cylinder can couple the weft and cooperate with the boring wheel to effect perforation of the weft substantially parallel to the first direction. Apparatus according to claim 1, characterized in that the shape frame comprises a priority of business forms each having a predetermined length x on the predetermined path; and wherein each of the perforating wheels has a circumferential point closest to the anvil cylinder, the circumferential points are spaced apart from each other on the predetermined path by a distance yx, where y is a positive integer. Apparatus according to claim 1, characterized in that the means selectively move after the cylinders towards the perforating wheels in such a way that the center lines of the anvil cylinders and the center lines of the perforating wheels are aligned, and substantially perpendicular to each other. the plot in the second position. Apparatus according to claim 2, characterized in that the raised portion of each of the anvil cylinders and an imaginary continuation thereof on the depressed portion has a circumference of 2x. Apparatus according to claim 3, characterized in that the axes of the anvil cylinders are mounted in eccentric bearing housings, and wherein the means for selectively moving each of the axes of the anvil cylinders towards and away from the drilling wheels they comprise means for rotating the housings of the eccentric bearings, in such a way that the eccentric rotation of the bearing housings move between first and second positions. Apparatus according to claim 5, characterized in that the means for rotating the housings of the eccentric bearings comprise linear actuators connected by crank arms in the housings. Apparatus according to claim 5, characterized in that the means for rotating the eccentric bearing housings rotate the housings between approximately 15-25 ° between the first and second positions. Apparatus according to claim 2, characterized in that the means for displacing a shape frame in a predetermined path in a first direction comprise at least first, second and third guide rollers, the anchor cylinders are located between the first and third guide rollers in the predetermined path and the second guide rollers are located between the anchor cylinders in the predetermined path. 9. Apparatus in accordance with the claim 8, characterized in that the guide rollers are positioned with respect to the perforating wheels in such a way that the weft is substantially tangent to the perforating wheels, when they couple the guide rollers. 10. Apparatus in accordance with the claim 9, characterized in that the first plane passing between the centers of the first and third guide rollers is parallel to a second plane passing between the axis of the drilling wheels and the first and second plane are spaced a first distance; and wherein a third plane passing through the center of the second roller parallel to the first plane separates a second distance lower than the first distance from the second plane. Apparatus according to claim 2, characterized in that it further comprises another drilling wheel mounted on a common axis with each of the first and second wheels and spaced from the first and second wheels in a second direction substantially transverse to the first direction. Apparatus according to claim 1, characterized in that the positions of the axes of the drilling cylinders are adjustable to allow less adjustment of the positions of the drilling wheels with respect to the predetermined path to provide adjustment of wheel pressure. 13. Apparatus for perforating a pattern of forms, characterized in that it comprises; a predetermined movement path of a pattern frame; a drilling wheel of substantially continuous rotatable circumference mounted on a substantially stationary axis on a first side of the predetermined path; an anvil cylinder comprising: an interrupted circumference including a raised portion and a depressed portion; and a moving shaft with respect to which the cylinder rotates, the anvil cylinder is mounted in an eccentric bearing housing and the moving shaft is disposed on a second side of the predetermined path opposite the first side; means for rotating the cylinders anvil about the axis; and means for selectively moving the axis of the anvil cylinder toward and away from the drilling wheel from a first position wherein the entire circumference of the anvil cylinder separates from the predetermined path and does not cooperate with the drilling wheel to a second position wherein the portion Elevated circumference of the anvil cylinder can intersect the predetermined path and engage a web that moves in the path and cooperates with the perforating wheel, to effect perforation of the web parallel to the first direction, the selective movement means comprise means for turning the eccentric bearing housings in such a way that the eccentric rotation of the bearing housings makes a movement between the first and second positions. Apparatus according to claim 13, characterized in that the means for rotating the eccentric bearing housing comprise a linear actuator connected by a crank arm to the housing. Apparatus according to claim 13, characterized in that the means for rotating the eccentric bearing housings rotate the housings between approximately 15 to 25 ° between the first and second positions. Apparatus according to claim 13, characterized in that the movement means selectively move the cylinder towards the drilling wheel in such a way that the center lines of the anvil cylinder and the center lines of the drilling wheels are aligned and are perpendicular to the frame in the second position. 17. Method for drilling a web of business forms, using first and second drilling wheels of substantially continuous circumference, operatively spaced from each other on a predetermined plot path and first and second anvil cylinders also operatively spaced from each other on the plot path and each has a raised circumferential portion and an oppressed circumferential portion, the portions raised to cooperate with the perforating wheels, which pierce the weft, the method is characterized in that it comprises the steps of: (a) moving the weft in a first direction on the predetermined screen path; (b) selectively moving the anvil cylinders from a first position where no circumferential portion of the anvil cylinders engage the weft, to a second position where the raised circumferential portions of the cylinders can couple the weft and cooperate with the wheels drilling rigs for drilling the plot parallel to the first direction; (c) rotating the anvil cylinders such that a point on its circumference moves tangentially in the first direction in synchronization with the movement in the frame in the first direction; and (d) selectively moving the anvil cylinders from the second position to the first position. 18. A method according to claim 17, characterized in that the wheels and cylinders are spaced apart from each other on the predetermined path, a distance yx where x is the length of a frame shape on the predetermined path e and is a whole number positive; and wherein the circumference of each of the raised portions of the anvil cylinder and its imaginary extension superimposing the depressed portion is equal to 2x; and wherein steps (a) - (d) are practiced to drill each even shape in the frame with the first wheel and cylinder and to drill each non shape in the frame with the second wheel and cylinder. 19. A method according to claim 17, characterized in that steps (b) and (d) are practiced to move the centerline of each anvil cylinder and the center line of its associated drilling wheel in alignment and perpendicular to the frame in the second position. 20. A method according to claim 17, characterized in that steps (b) and (d) are performed in response to electrical signals from a computer control.