US3667352A - Loop stabilize web fed variable repeat cutter-creaser system - Google Patents

Loop stabilize web fed variable repeat cutter-creaser system Download PDF

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Publication number
US3667352A
US3667352A US29103A US3667352DA US3667352A US 3667352 A US3667352 A US 3667352A US 29103 A US29103 A US 29103A US 3667352D A US3667352D A US 3667352DA US 3667352 A US3667352 A US 3667352A
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Prior art keywords
web
rotary
fed
feeding
loops
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US29103A
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English (en)
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Richard W Helmig
Floyd Steinmetz
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ROTOGRAPHIC MACHINERY CO
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ROTOGRAPHIC MACHINERY CO
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B65H20/04—Advancing webs by friction roller to effect step-by-step advancement of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4491—Features of movement or transforming movement of handled material transforming movement from continuous to intermittent or vice versa
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51538—Die-cutting

Definitions

  • ABSTRACT A web fed rotary variable repeat cutter-creaser system is provided for the packaging industry which is fed from a web stock of material either printed or unprinted or both.
  • This system consists basically of a pair of large diameter, very heavy walled drums on which is mounted a pair of cutting and creasing dies. These dies are in the form of a sheet metal blanket into which the shape to be cut and creased has been chemically milled. The dies are mounted on these two drums so that as they rotate together, with the dies being matched one to another in a registered position.
  • a feeder is provided for the die cylinders which has the qualities of feeding a selected length of material, yet is continuously supplied from roll web stock of material.
  • a crank working directly from the die cylinders forms storage loops in the web and advances it periodically. Swing rolls are oscillated by the crank arm and these are geared to a mechanism for advancing or retarding the fed portion of the web of material in accord with registration marks on the web stock.
  • Apparatus is provided for stabilizing the storage loops at high speeds to prevent the loops from distorting and doubling back on itself. Also, an arrangement is provided to create a definite bend in the web so that the break or start of the storage loop occurs at a predetermined point in the system during operation thereof.
  • FIG. 2B (LOOP FORMING) (REVERSE SWING ROLL FIG. 2C (END CUT) PATENTEUJUH 6 I972 3, 667. 352
  • This invention relates generally to cutting and creasing machines, and more particularly it pertains to a web fed rotary variable repeat cutter-creaser system for use in the packaging industry.
  • This invention is an improvement over the inventions shown and described in U. S. Pat. application Ser. No. 795,326 filed Jan. 30, 1969 invented by Floyd Steinmetz for Web Fed Rotary Variable Repeat Cutter-Creaser System, and U. S. Pat. application Ser. No. 743,748 filed July 10, 1968 invented by Floyd Steinmetz and Henry D. Ward, Jr. for Web Fed Rotary Variable Repeat Cutter-Creaser System.
  • the method for producing a variable cut or print length on a web stock of material has been to either change the diameter of the printing or cutting cylinder of the machine to suit the repeat length that is being produced on the web, or
  • variable repeat length By this, it is meant that adjustments can be made to a cutter-creaser type system to cut any length of stock required within the specific limits. Out of the material that is being fed through the system, the length of cut must be variable in the direction of sheet travel and if a web stock of material is being fed through a cutter-creaser, this stock may be printed with a repeat pattern, with one printed pattern appearing, for example, every 25 inches on the sheet.
  • the cut length must be positioned directly and exactly on the printed matter and the cut length must be exactly the length of the repeat of the printing without cumulative error.
  • the next order could be bacon board made from a difierent andunprinted roll of paper stock, and the repeat might be 38 inches long, for example.
  • the problem is to produce this variable repeat length of cut accurately.
  • the cutting and creasing loads are of a fairly high magnitude and this means that the structural members, such as the platen tables, which are used in platen presses, have to be extremely massive to be rigid enough to resist deflection under the cut and crease loads and, therefore, a reciprocating motion of the cutting mass and limits the physical speed of the machine. For this reason, it was found that a pure rotary motion of a pair of drums lends itself to much higher running speeds.
  • Another object of this invention is to provide a web fed variable repeat cutter-creaser' system which feeds a predetermined length of patterned material in register into dies.
  • Still another object of this invention is to provide a feeder system for die cylinders which has the qualities of individual blank feeding, yet is continuously supplied from web stock.
  • even another object of this invention is to provide a web fed variable repeat cutter-creaser type system having drums of a fixed diameter on which there are mounted cutting dies of different lengths to eliminate the requirement to physically change drums in order to produce the drum circumference which, in turn, would produce a different sheet length or repeat length.
  • Another object of this invention is to provide a cutter- I creaser system which is web fed in order to allow the most economical use of web stock of material.
  • Still even another object of this invention is to provide a web fed, variable repeat cutter-creaser system which is effectively and efficiently operated at both low and high speeds.
  • Another object of this invention is to provide a web fed variable repeat cutter-creaser system having means for stabilizing storage loops at high speeds to prevent the loops from distorting and doubling back on themselves;
  • Another object of this invention is to provide a web fed variable repeat cutter-creaser system having an arrangement to create a definite bend in the web so that the break or start of the storage loop occurs at a predetermined point in the system during operation thereof.
  • FIG. 1 is a side elevation in diagrammatic form embodying the components of a web fed variable repeat cutter-creaser system
  • FIGS. 2A, 2B, and 2C are diagrammatic views showing in sequence, the stages of one cycle of operation of the members of the system of FIG. 1 fonning an undesirable storage loop at high speeds;
  • FIGS. 3A, 3B, and 3C are diagrammatic views showing sequence, the stages of one cycle of operation of the members of the system of FIG. 1 modified by features of one embodiment of this invention to form a desirable storage loop at high speeds;
  • FIGS. 4A, 4B, and 4C are diagrammatic views showing in sequence, the stages of one cycle of operation of the members of the system of FIG. 1 modified by the features of a second embodiment of this invention to form a desirable storage loop at high speeds;
  • FIG. 5 is an enlarged schematic of the second embodiment of the invention as shown in FIGS. 4A, 4B, and 4C;
  • FIG. 6' is a perspective of a desirable blank formed by the web fed variable repeat cutter-'creaser system shown in FIG. 1 at both low and high speeds of operation of the system;
  • FIG. 7 is a perspective of undesirable blank formed by the web fed variable repeat cutter-creaser shown in FIGS. 2A, 2B, and 2C, at high speeds of operation of the system;
  • FIG. 8 is a cross-section taken along line 8-8 of FIG. 1;
  • FIG. 9 is a schematic of the first embodiment of the invention as illustrated in FIGS. 1, 3A, 3B, and 3C;
  • FIG. 10 is a schematic of second embodiment of the invention as illustrated in FIGS. 4A, 4B, 4C, and 5;
  • FIG. -1 1 is a schematic of a control arrangement for the web fed variable repeat cutter-creaser system of the invention
  • FIG. 12 is a graphical representation of a curve showing increase in web speed versus crank angle from the cuttercreaser system of the present invention.
  • reference numeral 10 indicates generally a preferred embodiment of the novel web fed rotary variable repeat cutter-creaser system of this invention. This system 10 will first be described generally and then followed by a detailed description of the main parts thereof.
  • a main drive 12 attached tothe structure S of the system is the prime power source at variable speed for the cuttercreaser system 10.
  • a main drive gear 13 onthe drive 12 meshes with an idler gear 14 ona shalt 16.
  • This idler gear 14 meshes with a gear 18, which is secured to an upper die drum carrying dies 22 for creasing or cutter operations.
  • Another gear 24 meshes in l to 1 ratio with gear 18 and it is secured to a lower die drum 26 carrying the lowerdies 28.
  • the lower drum 26 is adjustable vertically, longitudinally and circumferentially by means not shown, to accommodate respectively different web thicknesses of material and to register the dies 22 and 28.
  • the idler gear 14 also meshes with an input gear 30 of a positive infinitely variable drive 32. Because this drive 32 has a limited speed range, a set of change gears 34A, 34B etc. (only one of which is used at any given time) is supplied for taking off the output of the drive 32.
  • an idler gear 36 is provided, which is joumaled on a trunnion 38.
  • the trunnion 38 is fastened to a saddle 40 which pivots about a shaft 52.
  • a yoke 42 which is joumaled with the idler gear 36 has an adjusting screw 44 extended through a threaded post 46.
  • Post 46 is pivotally secured to the structure S of the system 10. In this manner, by advancing the adjusting screw 44, the idler gear 36 can be advanced from the position shown in solid lines to the position 36A shown in phantom lines to accommodate the largest diameter gear 34A or the smallest gear 348 of the change gear set previously mentioned.
  • the idler gear 36 further meshes with a gear 48 which rotates on the shaft 52.
  • Oscillating arms 50 also pivot on the shaft 52 and they carry a pair of swing feed rolls 54 and 60.
  • the upper swing feed roll 54 has a gear 56 which is meshed with the gear 48 and also meshes with a gear 58 on the lower swing feed roll 60, the latter in l to 1 ratio.
  • a connecting rod or crank 62 from a pivot 64 on the oscillating arms 50 extends to a crank disc 66 and is coupled thereto by a crank pin.
  • This crank disc 66 is attached by bolts 70 to the end of the die drum 20. This attachment is circumferenu'ally adjustablethrough the medium of arcuate slots 68 for the bolts 70 and thus varies the relative phase angle between the sweep of the crank 62 and the rotation of the dies 22.
  • the stroke length of the connecting rod or crank 62 is adjustable by means of a slot 72 which receives the crank pin and 8 allows the pivotal radius to be selected.
  • a buffer or air cushion is provided at reference 74, the cylinder of which is pivoted at 76 from the machine structure S.
  • the piston rod 78 of this air cushion 74 is attached to the oscillating arms 50 with a connecting pin 80.
  • Reference numerals 82 and 83 designate idler rolls over which in named sequence the roll stock material web W passes in the direction of the arrows. It then passes as shown, first over the drum 49 and then upper swing feed roll 54. The web W is carried halfway around the-latter to pass through the nip comprising rolls 54 and in conjunction.
  • a guide 88 defines a path for the web stock W to the engagement line of the drums 20 and 26. Clearance grooves 90 in the'swing feed roll 60 are provided for the guide 88 the latter having a suitable radius of curvature to accommodate the sweep as arms 50 oscillate.
  • a negative air pressure is maintained within the extended length of guide 88. This air pressure is communicated to the web stock W through perforations as will be explained.
  • a register control sensor 86 which through well-known means such as printed marks on the web stock W viewed by light sensitive cells, signals the positive infinitely variable drive transmission 32 to cause a readjustment of the speed of output to correct misregister of printed matter on the web stock W with the dies 22 and 28. It was discovered in the construction of the machine that the free loop 131 formed in guide 88 behaved in different fashions at difi'erent speeds of operation of the system.
  • the free loop 131 is that portion of the web between the swing rolls 54 and 60 and the die drums 20 and 26. This portion of the web is fiat when the cut starts, but after the cut starts, it fonns a loop 131 andthere is no roll or apparatus under the loop to maintain its shape; that is, there is no dancer roll.
  • FIGS. 2A, 2B, and 2C This phenomenon is shown in FIGS. 2A, 2B, and 2C.
  • FIG. 2A it is seen that the web W between the swing'rolls 54 and 60 and the die drums 20 and 26 is, in fact, flat on guide 88.
  • FIG. 23 where the web W has been overfed into the area, a loop 21 has formed and the loop 21 is just about what you get from the system during operation.
  • the low and medium speeds would be up to, perhaps, rpm of the system.
  • Top speed of the machine is 208 rpm so that loop problems occur at about 50 percent speed of the machine.
  • the dotted loop 23 shown in FIG. 2B is exactly the configuration that is encountered at high speeds of operation of the machine. It can be seen that the loop 23 would double back on itself and when it collapses, which occurs at extremely high rates of speed of the machine, the loop 23 would actually create a fold 25 and go through the dies 22 and 28 on the die drums 20 and 26 in a folded fashion. This is shown very well in FIGS. 6 and 7 which illustrate a blank cut-out.
  • the web W is a straight line between the swing rolls 54 and 56 and the die drums 20 and 26 and it' is lying against the guide 88.
  • the portion of the web W that is not a straight line is guided in a curved form so that as the swing rolls 54 and 60 move forward, the web W tends to press into the table or guide 88 and is restrained in that direction.
  • FIGS. 1, 3A, 3B, 3C,8 and 9 there is shown a series of guide bars 33 which lie above the web W just beyond the vacuum point. These guide bars 33 prevent any inadvertent forming of a secondary loop in that area.
  • a curved bar 29 is shown, which is stationary.
  • This curved bar or cylinder 29 is positioned so that it fonns a bend in the lower portion of the loop. It can readily be seen that the bend in the web W resembles the natural troublesome loop 23 that was shown in FIG. 2B by the dashed lines.
  • the web W is allowed to form its natural loop, but a cylinder is positioned in the lower portion of it to prevent the top from collapsing down onto itself and doubling over, as previously discussed.
  • FIGS. 4A, 4B, and 4C Another arrangement for solving this problem is shown in FIGS. 4A, 4B, and 4C and wherein a curved baffle device 35 is positioned between the swing rolls 54 and 60 and the die drums 20 and 26.
  • This baffle device 35 is formed of a doublewalled sheetmetal piece having vacuum apertures or perforations in the forward curved wall 37. Vacuum is applied to the baffle device 35 so that the web is sucked against the forward curve to prevent formation of the troublesome loop 23 that was shown in FIG, 2B by the dashed lines.
  • the cylinder 29 that is shown in FIGS. 3A, 3B, 3C, and 9 does not rotate at all and is stationary. It is made as a cylinder merely from an economic standpoint and could be a partial cylinder with the section from about 1 oclock to 7 oclock being the working surface. The remainder could discarded.
  • the machine described can be operated at top speed thereof of 208 rpm.
  • the advantages of the loop control systems described are mainly that with average thicknesses of web average thickness would be maybe from thousandths to 25 thousandths thickness of web-the machine can be operated at very high speeds, namely the top speeds of the machine.
  • Another advantage is that the loop'control systems will allow the machine to work with thinner web materials which would be more flimsy and tend to have loop instability.
  • the type of dies 22 and 28 envisioned for use on this cuttercreaser system 10 are of the chemically etched or milled type as described in US. Pat. No. 3,244,335 issued Apr. 5, 1966, entitled Method for Forming Severance Lines, issued to R. H. DownierOf course, it is not essential that the cutter-creaser system 10 be limited to these specific dies 22 and 28.
  • Conventional rotary dies such as are used for the manufacture of milk containers would be perfectly satisfactory for mounting on the die drums and 26.
  • the swing feed rolls 54 and 60 are geared together and are driven by the large gear 48 which is mounted on the center line of the torque shaft 52 previously mentioned. As the two swing feed rolls 54 and 60 rock back and forth on their arms 50 about the center of the torque shaft 52, their gears also rock back and forth around the large drive gear 48.
  • the large gear 48 which is sometimes called a bull gear and which is mounted on the torque or rocker shaft is also geared back through the gear train and the variable speed transmission 32 to the gears 30, 14, and 13 which drive the two main cutting drums 20 and 26.
  • This allows a variation of the-speed of the bull gear 48 and, therefore, the average feeding speed of the two swing feed rolls 54 and 60 by varying the gear ratios in the gear train and also by varying the drive ratio through the variable speed transmission 32. 7
  • the gear ratio would be adjusted by the variable speed transmission 32 to produce an average feed into the system 10 of 750 feet per minute surface speed on the feed rolls 54 and 60. This produces a differential in feeding speed of the web stock W relative to the cutting dies 22 and 28 of 230 feet per minute.
  • This speed of 230 feet per minute is then added to the feeding speed of the web stock W by the forward rocking motion of the swing feed rolls 54 and 60 about the torque shaft 52. This means that at the instant of the beginning of the cut, the web stock W of material will be entering the cutting point directly between the 'two die drums 20 and 26 at substantially the surface speed of the cutting dies 22 and 28.
  • the correcting action of the swing feed rolls 54 and 60 and their effect on the web stock W can be adjusted by selecting a different point on the speed curve of FIG. 12. This is done by moving the crank pin which is mounted on the end of cutting drum 20. The angular relationship of that crank pin to the leading edge of the cutting dies 22 and 28 can be moved. This in'efi'ect means that the web stock W is'inserted between the cutting dies 22 and 28 at a higher point on the speed curve of the roll motion to produce a greater speed correcting action, such as is required for short cut lengths.
  • crank pin can be adjusted to a different position to cause the web stock W to be inserted between the cutting dies 22 and 28 at a lower point on the speed curve such as a point near the end of the roll stroke where the forward motion of swing feed rolls 54 and 60 is relatively much smaller. This would be the case for instance, when a longer cut length is being fed.
  • crank pin which produces the rocking motion of the swing feed rolls 54 and 60 is mounted on the end of the rotary cutting drum 20.
  • crank pin it is not necessary that this crank pin be located there. It could be mounted on any gear in the drive train which makes one revolution per revolution of the cutting drum 20.
  • a simple crank motion has been used for the connecting rod or crank 62 such asshown in FIG. 1, materially for simplicity. It would also be possible to drive the oscillau'ng arms 50 with a cam mechanism or any similar device.
  • variable speed transmission 32 was introduced into the creaser-cutter system 10. Its speed adjustment range is quite narrow and its purpose is simply to allow for a slight modification to the particular gear'ratio which has been selectedso as to give a smooth and infinite transition of speed ratios from that which is produced from one change gear set to the next.
  • a printed repeat pattern is provided on the web stock W of material being fed into the system 10.
  • a set of change gears has been provided, together with a speed ratio in the variable speed transmission'32 so as to produce the same cut length in the system 10 that occurs in the web stock W on the printed matter.
  • this can only be done to a certain degree of accuracy. This error would occur for instance, in the setting of the variable speed transmission 32.
  • protruding end of the web stock W is accelerated forward into the nip of the cutting dies 22 and 28.
  • the curve of the guides will impart a slight curve to the web stock to increase its stability.
  • a secondary pair of idler rolls 82 and 83 are provided to obtain maximum angle of wrap of the web on the drum 49.
  • the drum 49 operating at a'constant predetermined speed will pull the web stock W of material from the primary roll or other source.
  • the material would be led through an edgeguiding and tension controlling set of equipment which is conventional in the industry.
  • This register control sensor 86 is a photocell which is located directly over the web stock W as it enters the swing feed rolls 54 and 60. This eye would pick up a register mark which is part of the printed matter. It picks up the position of the printing on the web 'stock W.
  • An additional sensor or roll angular position monitor 92 is provided as shown in FIG. 1 onthe end of one of the cutting drums, for example, drum 20 which continuously senses the position of the cutting drum 20 in the system 10, that is, its rotary or angular position.
  • a signal from each of sensor 86 and monitor 92 is then fed back into an electrical control system 96, as shown in FIG. 11, which is more or'les's a computer which then, taking these two sensing signals, can detect any error in the desired position of the cutting drurn 20 and 26 relative to the printed web stock W.
  • an error signal can be sent to a small motor or compensator actuator 94 which, in turn, controls the speed printed matter on the sheet at each cut. This will insure that although some error does occur, or can occur, in each cut length, this error can be limited to within a very small margin.
  • this system 10 has been developed to detect a printed register mark on the web stock W of material.
  • this mark need not be a printed mark or even a mark at all. It can, for example, be a magnetic impulsewhich is imparted to the web stock W of material at the required intervals or it could be a hole punched through the web stock W of material.
  • drums 20 and 26 there are two drums 20 and 26 involved, each of which carries a sheet metal type cutting and creasing die 22 and 28, respectively.
  • the system would be designed so that one drum would accept the curved plywood die.
  • the opposed drum would then be covered with a continuous blanket of a resilient material such as a polyurethane and this would allow the cutting blades in the die to drive through the web stock being cut into the polyurethane.
  • a sheeter is a machine which takes a web stock of material and simply cuts it into sheets. In this case, for example, there need only be one drum which would carry a blade running along its length. It is common in sheeters for the matching blade to simply be a beam with a cutting edge on it mounted under the drum. As the cutting edge of the blade passes over the corner of the beam, a shearing cut is produced. In this type of design of the system, for example, there would only be one drum involved and a fixed beam would supply the other cutting member. In the case of the sheeter with only one drum, the rest of the mechanism that has been described here would still be used to produce the variable length of sheet feed per cut.
  • system 10 there is another possible version of system 10, for example, where the two drums and 26 would be the main blanketcovered drums of an offset press.
  • the top and bottom of the sheet could be printed on and the printed matter could be applied to both drums at the same time by a regular offset printing press mechanism.
  • variable speed ratio equipment between the cutting drums 20 and 26 and the bull gear 48, with a combination of change gears and a variable speed transmission 32 being used. It is known that infinitely variable speed transmissions have a small percentage of error of the speed ratio through the transmission 32. In this instance of the present system 10, transmission 32 has been used to give a speed variation in very small increments which can be obtained by making a small change in the change gear ratio. Using the system this way, any error which matures through the variable speed transmission 32 is only a very small portion of the total speed ratio and, therefore, can be tolerated even on an extremely accurate machine.
  • variable speed transmission 32 can be designed which will have an extremely accurate control of the ratio within the transmission itself. In this case, if this error is very small it then means that it would no longer be necessary to use change gears at all.
  • the total control of sheet length range could be obtained by taking the entire drive ratio change in the transmission 32 itself and any slight errors which this extremely accurate transmission might produce, would then be controllable by the automatic scanning and correcting devices, previously mentioned.
  • the oscillating arms 50 which carry the swing feed rolls 54 and 60 are connected to the shock absorbing type cushion cylinder 74 to help absorb or level out the accelerating and decelerating forces which are produced by the linear back and forth motion of the swing feed rolls 54 and 60 themselves.
  • these swing feed rolls 54 and 60 are also accelerating and decelerating in a rotary direction about their own centers because their driving gears are rocking back and forth around the bull gear 52 which drives them.
  • an extra gear (not shown) has been connected to the bull gear 48.
  • This extra gear drives a hydraulic pumping system.
  • the valving in this system is such that once each revolution the connections through the hydraulic system are reversed so that the pump which is connected to this extra gear alternately becomes first a pump and then a hydraulic motor; so, during that period of the cycle in which the bull gear 48 is attempting to accelerate the swing feed rolls 54 and 60, the hydraulic system is valved to produce an auxiliary assist to the driving motion, and it helps to smooth out the loads back through the gear train.
  • a web fed variable repeat length system for performing at least one operation on a web comprising, structure including a work member positioned thereon for working on a continuously supplied web fed thereto during each working cycle of said work member, means arranged to form free storage loops in said web and advance said web periodically to said work member, means for stabilizing said free storage loops formed in said web, and means coupled to said means for forming said free storage loops and controlled by said structure having said work member to cause said storage loop means to feed a predetermined length of web to said work member for operation thereon by said work member.
  • a web fed variable repeat length system for performing at least one operation on a web, comprising, structure including a work member positioned thereon for working on a continuously supplied web fed thereto during each working cycle of said work member, means arranged to form free storage loops in portions of said web and advance said web including said loop portions periodically to said work member, means for stabilizing said free storage loops fonned in said portions of said web, and means coupled to said means for forming said free storage loops and to said structure having said work member to cause said storage loop means to feed a predetermined and adjustable length of web to said work member for operation thereon by said work member.
  • a web fed variable repeat length system for performing at least one operation on a web, comprising, means including a work member positioned thereon for working on a continuously supplied web fed thereto during each working cycle of said work member, means arranged to form free storage loops in portions of said web and advance said web including said loop portions periodically to said work member, means for stabilizing said free storage loops formed in said portions of said web during a period when said loops are being formed and advanced to said work member, and means coupled to said means for forming said free storage loops and to said means having said work member to cause said storage loop means to feed an adjustable length of web to said work member for operation thereon by said work member.
  • a web fed rotary variable repeat length system for performing'at least one operation on a web, comprising, means including at least one rotary drum having a work member positioned thereon for working on a web fed to said dmrn, feeding means arranged to feed said web to said rotary drum, means for causing said feeding means to travel through one complete control cycle for each revolution of said rotary drum, means coupled to said feeding means and to said rotary drum to cause said feeding means'to feed an adjustable length of web to said rotary drum at substantially the surface speed thereof for operation thereon by said work member on said rotary drum, and means for stabilizing said adjustable length of web fed to said rotary drum.
  • a web fed rotary variable repeat length system for performing at least one operation on a web comprising, means including at least one rotary drum having a work member positioned thereon for working on a web having spaced indicia thereon fed to said drum, feeding means arranged to form and feed free storage loops of said web to said rotary drum, means for causing said feeding means to travel through one complete control cycle for each revolution of said rotary drum, means coupled to said feeding means and to said rotary drum to cause a change in the feeding action of said feeding means to correct for misregister. between said spaced indicia on said web and'the work member on said rotary drum, and means for stabilizing said free storage loops of said web as said loops are being formed and fed to said. rotary drum.
  • a web fed rotary variable repeat length system for performing at least one. operation on a web, comprising, means including a pair of spaced rotary drums having work members positioned in registerv with one another thereon for working on a web fed between said rotary drums, feeding means arranged to form and feed free storage loops of said web between said rotary drums, means for causing said feeding.
  • a web fed rotary variable repeat length system for performing at least one operation on a web, comprising, means including a pair of spaced rotary drums having work members positioned in register with one another thereon for cutting and creasing sections from a web having spaced'indicia thereon and fed between said rotary 'drums, feeding means arranged to form and feed free storage loops of said web to said rotary drums, means for stabilizing said free storage loops of said web as said loops are being formed and fed to said rotary drums, means for causing said feeding means to travel through one complete control cycle for each revolution of said rotary drums, drive means coupled to said feeding means and to one of said rotary drums, and means for sensing said spaced indicia on said web and the angular position of said rotary-drums and for signaling said drive means to cause a change in the feeding action of said feeding means in order to correct for misregister of said spaced indicia on said web and said work members on said rotary drums d 10.
  • a web fed rotary infinite variable repeat cutter-creaser system comprising, means including a of spaced rotary members having work elements positioned in register thereon for cutting-creasing sections from a web having spaced indicia thereon fed between said rotary members, feeding means having spaced rolls mounted thereon arranged to receive said web between said rolls and to form free storage loops of said web forward of said rolls and feeding said free storage loops of said web into said rotary members at substantially the surface speed thereof, means for stabilizing said free storage loops of said web as said loops are being formed and fed to said rotary members, means coupling said feeding means with one of said rotary members, a variable ratio drive means coupled to said feeding means and to said one rotary members, and means for sensing said spaced indicia on said web as well as the angular position of said. rotary members and for signaling said variable ratio drive means to cause a readjustment of the speed of output of said variable ratio drive means to correct for misregister of said indicia on said web with said work elements on said
  • a variable repeat length system for performing at least one operation on a web comprising, means having a work member positioned thereon for working on a continuously supplied web having spaced indicia'thereon fed to said work member during the working cycle thereof, feeding means arranged to form free storage loops in said web and advance said free storage loops in said web periodically to said work member, means for stabilizing said freestorage loops as said loops are being formed and fed to said work member, means for causing said feeding means to travel through one complete control cycle for each cycle of operation of said work member, and means coupledto said feeding means and to said means having said work member to cause a change in the feeding action of said feeding means to correct for misregister between said spaced indicia on said web and the work member.
  • a web fed rotary variable repeat length system for performing at-least one operation on a web, comprising, means including a pair of spaced rotary members having work elements positioned in register with one another thereon for working on a continuously supplied web fed between said rotary members during the working cycle thereof, feeding means arranged to form free storage loops in said web and advance said loops in said web periodically to said work elements, means for stabilizing said free storage loops in said web as said loops are being formed and advanced to said work elements, means for causing said feeding means to travel through one complete control cycle for each cycle of operation of said rotary members, and means coupled to said feeding means and to one of said rotary members to cause said feeding means to feed an adjustable length of web to said rotary members at substantially the surface speed thereof for operation thereon by said work elements.
  • -A web fed rotary infinitely variable repeat cuttercreaser system comprising, means including a pair of spaced rotary members having work elements positioned in register thereon for cutting-creasing printed carton sections from a continuously supplied web having spaced indicia thereon fed between said rotary members, feeding means arranged for forming and feeding free storage loops of said web to said rotary members at substantially the surface speed thereof, means for stabilizing said free storage loops of said web as said loops are being formed and fed to said rotary members, means coupling said feeding means with one of said rotary members, drive means coupled to feeding means and to said one rotary member, and means for sensing said spaced indicia on said web as well as the angular position of said rotary members and for signaling said drive means to cause a readjustment of the speed of output of said drive means to correct the misregister of said indicia on said web with said work elements on said rotary members.
  • said stabilizing means includes means disposed between said storage loop forming means and said work member for permitting the formation of a natural loop in said web with a bend being formed in the loop about said permitting means to prevent the top of the loop from collapsing down onto itself and doubling over.
  • said permitting means includes a stationary bar which extends across the path of movement of the web and is formed with a curved portion over an exterior portion thereof whereat the bend in the natural loop of said web is formed.
  • said stabilizing means includes a plurality of guide means located above the path of movement of said web between said storage loop forming means and said work member to prevent the undesirable formation of a secondary loop during the formation of said free storage loops in said web.
  • said stabilizing means includes means located between said storage loop forming means and said work member and having a loop engaging surface for permitting a trailing portion of the free storage loops to be formed thereagainst and means for holding said trailing portion thereagainst until said loop is advanced to said work member to prevent the formation of an undesirable loop form when said free storage loops are formed.
  • permitting means includes a bafile device having a curved wall and a linear wall extending from said curved wall and said holding means includes apertures formed in said curved and linear walls and a vacuum being ap plied to said bafile device to draw and hold the trailing portion of said free storage loops thereagainst.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Advancing Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Control Of Cutting Processes (AREA)
US29103A 1970-04-16 1970-04-16 Loop stabilize web fed variable repeat cutter-creaser system Expired - Lifetime US3667352A (en)

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US2910370A 1970-04-16 1970-04-16

Publications (1)

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US3667352A true US3667352A (en) 1972-06-06

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US29103A Expired - Lifetime US3667352A (en) 1970-04-16 1970-04-16 Loop stabilize web fed variable repeat cutter-creaser system

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US (1) US3667352A (enrdf_load_stackoverflow)
JP (1) JPS5241516B1 (enrdf_load_stackoverflow)
CA (1) CA925527A (enrdf_load_stackoverflow)
GB (1) GB1296027A (enrdf_load_stackoverflow)
SE (1) SE358341B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5797242A (en) * 1995-06-09 1998-08-25 De La Rue Giori S.A. Production of an endless band and method and banding apparatus for banding with this endless band
EP1026111A3 (en) * 1999-02-05 2001-04-18 Allan R. Prittie Injector for rotary web processing device with fixed diameter base

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53157428U (enrdf_load_stackoverflow) * 1977-05-18 1978-12-09

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732704A (en) * 1927-09-30 1929-10-22 Spadone Machine Company Inc Cutting machine
US2982189A (en) * 1957-09-06 1961-05-02 S & S Corrugated Paper Mach Power driven adjusting means for slotting, scoring, creasing and slitting machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732704A (en) * 1927-09-30 1929-10-22 Spadone Machine Company Inc Cutting machine
US2982189A (en) * 1957-09-06 1961-05-02 S & S Corrugated Paper Mach Power driven adjusting means for slotting, scoring, creasing and slitting machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5797242A (en) * 1995-06-09 1998-08-25 De La Rue Giori S.A. Production of an endless band and method and banding apparatus for banding with this endless band
EP1026111A3 (en) * 1999-02-05 2001-04-18 Allan R. Prittie Injector for rotary web processing device with fixed diameter base

Also Published As

Publication number Publication date
DE2100630A1 (de) 1971-10-28
GB1296027A (enrdf_load_stackoverflow) 1972-11-15
SE358341B (enrdf_load_stackoverflow) 1973-07-30
JPS5241516B1 (enrdf_load_stackoverflow) 1977-10-19
CA925527A (en) 1973-05-01
DE2100630B2 (de) 1976-08-12

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