US 3888399 A
A bursting apparatus is provided for separating and/or deleaving carbon paper from a multipart perforated continuous series of forms having carbon paper interleaved therein. The forms are fed to a bursting station which includes a clamp bar and a segmented bursting roller which is driven by a one-revolution clutch or the equivalent thereof. Each successive leading edge of the form actuates a stop-feed switch for automatically metering a single form length to the bursting station. The clutch is also actuated, thereby moving the clamp bar on the next succeeding form and the bursting roller revolves for one revolution to burst the leading form and deliver it to a deleaving station. The segmented burster roller has a slight helix on its engaging edge so that bursting tension will start at one edge and move progressively across the width of the form. The deleaving station has structure similar to that of the bursting station, but modified such that the clamping bar and bursting roller are positioned orthogonal to those in the bursting station and operate on the margin of the forms. When the leading edge of the form reaches stop fingers at the deleaving station, the clamp bar clamps one side margin of the form while the bursting roller revolves one revolution to separate the margin of the form to which the carbon paper is secured, thus deleaving the form. The bursting and deleaving operations are repetitive and continuous.
Description (OCR text may contain errors)
United States Patent 1 Hanson et al.
1 1 BURSTING APPARATUS  Inventors: Walter ,1. Hanson, Old Greenwich;
Erilts Parups, Norwalk, both of Conn.
 Assignee: Pitney-Bowes, 1nc., Stamford, Conn.
 Filed: Oct. 31, 1972  Appl. No.2 302,607
Primary Examiner-Frank T. Yost Attorney, Agent, or FirmWilliam D. Soltow, Jr; Albert W. Scribner; Martin D. Wittstein  ABSTRACT A bursting apparatus is provided for separating and/or June 10, 1975 deleaving carbon paper from a multipart perforated continuous series of forms having carbon paper interleaved therein. The forms are fed to a bursting station which includes a clamp bar and a segmented bursting roller which is driven by a one-revolution clutch or the equivalent thereof. Each successive leading edge of the form actuates a stop-feed switch for automatically metering a single form length to the bursting station. The clutch is also actuated, thereby moving the clamp bar on the next succeeding form and the bursting roller revolves for one revolution to burst the leading form and deliver it to a deleaving station. The segmented burster roller has a slight helix on its engaging edge so that bursting tension will start at one edge and move progressively across the width of the form. The deleaving station has structure similar to that of the bursting station, but modified such that the clamping bar and bursting roller are positioned orthogonal to those in the bursting station and operate on the margin of the forms. When the leading edge of the form reaches stop fingers at the deleaving station, the clamp bar clamps one side margin of the form while the bursting roller revolves one revolution to separate the margin of the form to which the carbon paper is scoured, thus deleaving the form. The bursting and deleaving operations are repetitive and continuous.
5 Claims, 4 Drawing Figures BURSTING APPARATUS BACKGROUND OF THE INVENTION This invention relates to bursting apparatus and more particularly to the separation and/or carbon-paper deleaving of a multipart continuous series of forms having carbon paper interleaved therein.
Computer-generated forms of a type conventionally delivered from electronic data processing systems consist of a multipart continuous series of forms having carbon paper interleaved therein. Such forms are conventionally generated for use in billing and other typical business transactions. The continuous series of forms then requires further processing for end use such as mailing. This may require bursting or separating the forms and removing the carbon paper therefrom, as well as the performance of the end functions of stacking, stamping, sealing, inserting, collating (for additional enclosures) and folding. The aforesaid end functions are all provided for with existing equipment in one continuous process. However, the bursting and carbon-paper deleaving functions are not so integrated and are currently accomplished using separate bulky and expensive equipment for performing the bursting and deleaving operations. In current practice the first step in processing the computer print-out forms, preparatory to mailing, is the removal of the interleaved carbon paper. This is typically done by first slitting the margin to which the carbon paper is secured to provide manual access to the carbon paper, then manually drawing the carbon paper over a deflector out at right angles to the path of the forms, and then sidewinding the carbon paper on a spooiing device; the forms restacking in a continuous fanfold. This step currently requires a separate piece of equipment and an operator to place the forms in the equipment, wind the carbon paper on a roll to get it started, remove the stacked forms, and also remove from the roll the carbon paper deleaved from the forms.
The next step requires a separate piece of equipment for bursting the continuous series of forms into individual documents or forms which include the original and One or more copies. This bursting step is typically accomplished by feeding the continuous forms at relatively slow speed, deflecting the forms under a bursting knife, and then engaging higher speed feed rollers. The speed differential tensions the forms and in conjunction with the knife bursts the forms along the perforation line between the forms. The individual forms are ejected from the high-speed rollers to a stacker and then must be transported by an operator for further processing.
The separate steps of bursting and carbon-paper deleaving are time-consuming and costly due to the requirement of individual equipments and operators time in performing the functions. This also cuts down the number of forms which may be processed in a given time interval.
SUMMARY OF THE INVENTION Accordingly, it is an object of this invention to provide a new and novel burster apparatus which can be used with present equipment to provide one continuous process for the handling and processing of computer form print-outs.
A further object of this invention is to provide a burster apparatus which increases the rate at which a continuous series of forms may be totally processed.
A still further object of this invention is to provide a bursting apparatus which integrates the steps of bursting and carbon-paper deleaving from a multi-part continuous series of forms with existing equipment without requiring separate machines and operator time.
In carrying out this invention in one illustrative embodiment thereof a bursting apparatus is provided for separating and/or deleaving carbon paper from a multipart perforated continuous series of forms having interleaved carbon paper secured to one margin and free of the other margin thereof. Controllable drive means are provided for advancing the continuous series of forms to a predetermined position where such drive means is disengaged. Overlying the forms in the predetermined position are a clamping means and a segmented burster roller which is positioned over the leading edge of the continuous series of forms, with the segmented portion overlying and out of contact with the leading edge of the series of forms in its inactivated position. Burster roller drive means are provided for rotating the burster roller one revolution when activated. When the predetermined position is reached by a form the drive means is stopped, the clamping means clamps the next succeeding form of the series of forms along the perforation line between the forms, and the segmented burster roller is rotated for one revolution bringing the burster roller in contact with the form thereunder thereby tensioning and separating the form from the continuous series of forms. Carbon paper deleaving is accomplished in the same manner except that the clamping means and burster roller are positioned over the perforated margins of the forms on which they operate, to provide the carbon-paper deleaving function. The bursting and carbon-paper deleaving functions may be performed either singly or in combination, the latter being the preferred form, in order to obtain maximum advantage of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows one type of form, partly broken away to illustrate its multiple part construction, which is desired to be processed by the present invention.
FIG. 2 is a conceptual isometric view of bursting apparatus for performing the bursting function in accordance with this invention.
FIG. 3 is a conceptual isometric view of bursting apparatus for performing the carbon-paper deleaving function in accordance with the present invention.
FIG. 4 is an isometric view of one form of the bursting apparatus of this invention incorporating both the bursting and carbon deleaving functions operating on a continuous series of multipart forms.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIG. I, there is shown a multipart continuous series of forms 10 of a type delivered from electronic data processing systems which are to be further processed for ultimate use, such as mailing. The forms 10 are continuous with the first form in the series, illustrated as form I4, succeeded by the next succeeding form 12, which forms are delineated by a perforation line 13 therebetween. The forms I0 are multipart forms having an original 15 and one or more copies l7 and 19, which are separated by one or more car bon papers 16 and 18. Both the right-hand and left hand margins 22 and 24 respectively are bonded, with the carbon paper 16 and 18 being secured to the righthand margin 22 at the edge 20 and the left-hand edge of the carbon paper being free. Both margins 22 and 24 contain standard sprocket holes 26 therein with a conventional half-inch pitch. The first form 14 of the continuous series of forms 10 has a leading edge 11. The series of forms 10 is illustrated as being typical of the type of forms of the same general type having either more or fewer copies and more or fewer carbons may be utilized.
in processing the forms such as shown in FIG. 1, it is generally required that the forms be separated, or bursted. into individual forms and the conceptual illustration of FIG. 2 is utilized to explain this function in accordance with the present invention. The continuous series of forms 10 are fed to a bursting station generally identified with the reference character 25. The forms are fed to station 25 by sprocket wheels 28 until the leading edge 11 of the first form 14 reaches a predetermined position or feed stop-line. The bursting station 25 has an upper clamp bar 30 and a lower clamp bar 31 which are open when the forms 10 are being fed to the station 25 and are Closed for performing the bursting function. The lower clamping bar 31 may be in the form of a stationary table or platform forming part of the station. The clamping bars are adjustable in the direction of form travel so that different length forms can be accommodated. On the forward end of the bursting station 25 are positioned cooperating bursting rollers 36 and 34. The upper bursting roller 36 is segmented, having a flat portion 38 thereon and a leading bursting edge 40 which is formed with a slight helix. in opera tion to provide the bursting function, the sprocket wheels 28 advance the leading form 14 of the continuous series of forms 10 until the leading edge 11 of the first form 14 reaches the predetermined feed stop-line, at which point the movement of the sprocket wheels 28 is stopped by suitable arrangement, such as disengagement of a clutch, thus providing the function of automatically metering a one-form length to the bursting station. The clamp bars 30 and 31 then effectively close engaging the next succeeding form 12. The bursting rollers then rotate through one revolution with the leading edge 40 of the burster roller contacting the form 14 and applying bursting tension progressively across the width of the form 14. The rollers 36 and 34 eject the bursted form 14 so that the latter may be transported or stacked for a succeeding processing ste 'l he carbon-paper deleaving function will, for ease of explanation and understanding, be initially discussed in connection with the conceptual showing of FIG. 3. The bursted individual form 14 is transported or fed to a deleaving station generally referred to by reference char acter 45. The deleaving station has a pair of side clamp bars 44 and 46 and a pair of side-bursting rollers 50 and 48. The upper side-bursting roller 50 is segmented and constructed in the same manner as bursting roller 36 at the bursting station 25. It will be noted that the bursting station 45 has essentially the same elements as the bursting station 25, except that the clamp bars 44 and 46 and the rollers and 48 of the deleaving station 45 are orthogonal or disposed at substantially at right an gles with respect to their counterparts in the bursting tatiou af', wit on tic. .atio. working on the nmrg ns the of ti ntent instead of i tl i. 1 t i i st ing station i?- i= Q J' 14 face dovvn so that the upper burster re 1 50 oper ates on the right-hand margin of the fr rrn shown in FIG. 1. it will be remembered that the righthand margin of the form 14 is the one to which the ca n paper is affixed, with the carbon paper being free at the left hand margin. With the form 14 in positirn'. and clamped the burster roller 50 has its leading hencal edge con tacting the right-hand margin 22 of the form, bursting it along the length thercofon perforations ii. A pair or takeaway rollers 52 are provided for transpoi ing the separated margin 22 with the attached 6. LIVCCl LZilbt'in paper to a suitable disposal bin. l. should .11 noted thn; the deleaving station 45 has similar comptments and operates essentially the same as the bursting station 25 with the difference being that deleaving station is a side-bursting opcrznion which is perfo med on a different portion of the form 14.
An impicmcnta on of the vombined bursting and carbon-paper de eaving functions is shown In FIG. 4. Like reference nurnerals from previous figures are used where appncable. llrive for the apparatus is provided by a motor 82 which powers :1 chain-driven drive 84 operating on sprocket wheei drive shaft 88 and drive shaft 86. Drive shaft 86 ais drives a deleaving station drive-shaft 95 through licvci gears 97. The continuous series of forms 10 are f d via sprocket wheels 28 to the burster station 25. The forms of FIG. l are fed face down in this operation to implement the bursting operation in the form illustrated in FIG. 4. The drive for the sprocket wheels 28 is provided by the drive shaft 88 operating through a wrap spring type clutch having an associated control solenoid 92. The bursting station 25 is provided with a stop finger switch 72 which is contacted and deflected by the leading edge of the next succeeding form, which in this case is form 12, at its leading edge 13. The clamping bar 30 is provided to grip the leading edge of the next succeeding form in co operation with a lower clamping means which is not shown in FIG. 4 but which may be in the form ofa table or platform over the forms 10- move. The upper segmented bursting roller 36 and lower bursting roller 34 are provided with intermeshing gears at the far end (not shown for ease of illustration) so that they rotate in unison when driven by shaft 60. The drive shaft 86 has positioned thereon any suitable type halfrevolution clutch 52 having a clutch latch 54 cooperat ing therewith which is controlled by a solenoid 56. The half-revolution clutch 52 is geared as at 58 to the burster roller shaft 60 on which is secured l) a timing cam 62 which cooperates with timing switch 64, and (2) a stepping cam 66 which actuates a four-bar link age 68 for operating a springdoaded clamp bar shaft 76 secured to the pivotable clamping bar 30.
The deleaving station 45 is provided with any suitable continuously moving transport means, such as belts 74 that are driven by the drive shaft 86 and associated pulleys, for moving separated documents from the bursting station 25 into position in the deleaving station 45.
A switch 80 is provided which is adapted to be actuated by the leading edge of a document that is fed into operative position in station 45', the document being held in this position in the bursting station 45 by movable stop fingers 78 that hold the document in opposition to the continuous frictional drive action of belts 74. Fingers 78 are coupled by mechanical linkage 94 to clutch latch clamping The upper segmented burster roller 50 is adapted to be driven by a side burster roller shaft 93 which is coupled via gear 97a to a half-revolution clutch 100. A step cam 98 is mounted on said shaft 93 for actuating a four-bar mechanical linkage 96 for controlling the clamp bar 44. The operation of the drive means for the clamp bar 44 and the roller 50 corresponding to those described above for bar 30 and roll 36. The associated lower bursting roller, as well as the ejection rollers for laterally feeding the deleaved carbon paper, are not shown in FIG. 4 for ease of illustration, but respectively correspond to those shown at 48 and 52 of FIG. 3. The lower clamping bar which is also not shown, may be in the form of a platform underlying the station over which the belts 74 and the documents traverse. It will be noted that the form clamping means, bursting rollers, and the actuating means therefor respectively, at the deleaving station 45 are similar to those respectively disposed at the first bursting station 25. The electrical circuit interconnecting the various switches and solenoids of P10. 4 may be of any conventional design to produce the control sequencing hereinafter described and hence need not be further shown or described herein.
The operation of the apparatus of FIG. 4 will now be described assuming that the first form 14 has already been separated and is to be fed into the deleaving station 45 while the next form 12 is fed into the bursting station 25.
When a start-feed signal is applied to the solenoid 92 the clutch 90 is engaged and the sprocket wheels 28 ad vance the forms into the bursting station 25. The form shown in position in the bursting station 25 of FIG. 4, is form 12, and it is advanced until the front edge 13 thereof makes contact with the burster control switch 72. (It should be noted that switches 72 and 80 are electrically switched when the switch arms thereof ride up and over the leading edges of the associated advancing forms, as illustrated in FIG. 4). Operation of switch 72 serves to de-energize the solenoid 92, disengaging the clutch 90 and stopping the sprocket wheels 28. Thus one document or form length is automatically metered into the bursting station 25 and the form 12 stops in a position to be bursted on demand. A machine cycle switch (not shown) actuates solenoid 56 to momentarily release the clutch latch 54 so that burster drive shaft 60 is driven through one revolution. in the implementation shown the conventional type clutch 52 is a halfrevolution clutch coupled through gear 58 so as to produce one full revolution of the burster shaft 60; this of course constituting the equivalent of one-revolution clutch. This single counterclockwise revolution of shaft 60 will cause the clamping means 71 to clamp the next strip form, and then the bursting rollers 34, 36 to separate the form 12 from the trailing forms. To this end when counterclockwise rotation of cam 66 is initiated from the position shown in FIG. 4, the pivoted cam follower portion 68b of said linkage 68 will drop off the outermost cam surface so as to effectively allow said four bar linkage portion 68a to swing upwardly sufficiently to permit the spring biased arm 69 secured to mounting shaft for bar 30 to rotate in a counterclockwise direction. This spring driving action will cause the lobe 71 of the clamp bar 30 to swing downwardly into clamping engagement with the forward end portion of the form 12a next following form 12 to hold said following form immobile. During this clamping action the bursting rollers 36 and 34 will be rotated through one revolution by the burster shaft 60, bringing the helical edge 40 of the burster roller 36 in contact with the leading edge of the form 12 for providing a bursting tension which starts at one edge and moves progressively across the width of the form 12, separating it from the continuous series of forms 10. After the step cam 66 has revolved about 180, the four bar linkage portion 68a will be lowered sufficiently to pivot the arm 69 clockwise against its said biased action thereby raising the clamp bar lobe 71. The switch 64 which is operated by timing cam 62 when the clamp bar lobe 71 is raised serves to actuate said solenoid 92, and thus the clutch 90, so as to start the sprocket wheel feed to meter the next document 12a into the bursting station 25.
During the above described operations on form 12 at station 25, the bursted form 14 which had earlier been separated from the continuous series of forms 10 at said station 25 is transported via friction belts 74 to the deleaving station 45. The separated document 14 moves into the deleaving station 45 until its leading edge 11 contacts the side burster switch 80, and is held in position by the now elevated fingers 78. The side burster control switch actuates solenoid 104 to remove the clutch latch 102 from the conventional type half-revolution clutch 100. Operation of clutch causes (1 step cam 98 to actuate the four-bar linkage 96 so that the lobe 47 of clamp bar 44 is brought down inside the left-hand margin 24 of the document 14; this action being similar to that for the said clamping movement of lobe 71 on clamp bar 30, and (2) the burster roller shaft 93 to then be driven through one revolution via the gear 97a. This clamping of the form margin 24 and the rotation of the burster roller 50 through one revolution causes separation (along score line 21) of the margin 21 together with the attached carbon papers from the rest of the form 14. A switch 960 actuated by a cam 99 secured to the deleaving station drive shaft 93 operates the solenoid 104 prior to the completion of one revolution of the side burster roller drive shaft 93 so as to insure only a single cycle of operation of the half-revolution clutch 100 and allowing a set of continuously driven take away rolls, such as those illustrated at 52 of FIG. 3, to laterally remove the form margin 22 and the attached carbon sheets from the deleaving station 45 and deliver such to a suitable waste bin.
Pressure rollers 76 are provided at the deleaving station which overlay the forms so that the latter may be urged against and fed by the continuously driven friction belts 74 towards the stop fingers 78. The form 14 is held in the burster station 45 until said stop fingers 78 are lowered at which time the belts 74 advance the separated forms without the carbon interleafs downstream, as indicated by arrow 105, for subsequent stacking or the performing of the next operation on the forms. The stop fingers 78 are cyclically lowered by linkage 94 each time the solenoid 56 for the burster drive clutch for station 25 is actuated.
The stations 25 and 45 can be adjusted to accommo date documents of different lengths by varying the relative position of the clamp 30, 31 with respect to the burster rollers 36 and 34. Likewise the position of clamp 44, 46 with respect to roller 50 may be made adjustable to accommodate documents of different widths; the four bar linkages 68 and 96 still swing to control the associated clamp means 7i and 47 in any of such adjusted positions.
The burster apparatus of the present invention can be attached directly to conventional downstream folding, inserting. mailing and/or other document processing machines. When so used the forms may thus be completely machine processed in a continuous line operation from computer print-out to mailing. When per forming both the bursting and deleaving operations using applicant's invention the usual separate, bulky and expensive machines for performing these functions are eliminated, thus form processing is speeded up and costly manual labor operations are practically eliminated.
Since other modifications and changes varied to fit particular operating requirements and environments will be apparent to those skilled in the art, the invention is not considered limited to the examples chosen for purposes of disclosure. and covers all changes and modifications which do not constitute departures from the true spirit and scope of this invention.
What is claimed is:
l. A bursting apparatus for separating a continuous series of forms having perforation lines therebetween into individual forms: comprising A. feed means for intermittently advancing said continuous series of forms;
B. clamping means having a clamping condition for holding said continuous series of forms immobile and a release condition for allowing feed movement of said continuous series of forms;
C. actuating means for said clamping means;
D. burster roller means adapted when operated to apply a feed tension force to the leading form in said series of forms;
E. drive means for rotating said burster roller means;
F. control means for controlling the operation of said clamp actuating means and said burster roller drive means to cause said burster roller means to apply a tension feed force to the leading form in said series while said clamping means is clamping the next form following said lead form in said series whereby said lead form may be separated from the remaining forms in said series;
Gr said actuating means for said clamping means including a movable bar member and means for moving said bar between clamping and release positions, said bar member having an operative longitudinal edge that serves to operate said clamping means for any form length adjusted position of said clamping means along the length of said bar member.
2. A bursting apparatus for separating a continuous series of forms having perforation lines therebetween into individual forms; comprising A. feed means for intermittently advancing said con tinuous series of forms so that the leading edge of the series is moved to a predetermined position;
B. clamping means having a clamping condition for holding said continuous series of forms immobile and a release condition for allowing feed movement of said continuous series of forms;
C. actuating means for said clamping means;
D. burster roller means positioned adjacent the leading edge of said continuous series of forms when the latter is in said position, and adapted when operated to apply a feed tension force to the leading form in said series of forms;
E. driving means for rotating said burster roller means; and
F. control means for controlling the operation of said clamping actuating means and said burster roller drive means to causesaid burster roller means to apply a tension feed force to the leading form in said series while said clamping means is clamping the next form following said lead form in said series whereby said lead form may be separated from the remaining forms in said series;
0. said control including a switch means that is operative to cause said feed means to be disabled when said leading edge of said series of forms reaches said predetermined position.
3. The bursting apparatus set forth in claim 2, wherein said control means includes clutch means acti vated by said switch means for driving said burster roller drive means for one revolution, said burster roller drive means including means for actuating said clamping means prior to the bursting action and then releasing said clamping means.
4. The bursting apparatus set forth in claim 3 wherein said clamping means includes a rotatably mounted bar having a radially extending clamping portion that is adapted to be swung into and out of clamping contact with said forms.
5. The bursting apparatus set forth in claim 3, wherein said means for activating and releasing said clamping means comprises a step cam mounted on said burster roller drive means which drives a mechanical linkage coupled to said clamp means.