US3327595A - Paper joining machine - Google Patents

Description

June 27, 1967 J. A. HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet l A A INVENTOR 48 w 50 57 l'fizmz'e Qifarrod BY PM W ATTOFNE'K June 27, 1967 J. A. HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet 2 INVENTOR- J'z'mmzle QHZzrrod ATTOFNEK June 27, 1967 J. A. HARROD 3,327,595

PAPER JOINING MACHINE Filed Jan. 14, 1965 5 Sheets-Sheet 3 INVENTOR. Jimmzie CZJZEzrroQ' ATTOPNEY United States Patent 3,327,595 PAPER JOINING MACHINE Jimmie A. Harrod, Middleport, N.Y., assignor to Paper yelder, Inc., Medina, N.Y., a corporation of New ork Filed Jan. 14. 1965, Ser. No. 425,392 11 Claims. (Cl. 93-1.1)

The present invention relates to an improved machine of the type which is utilised for joining a plurality of sheets of paper together by a squeezing action between a pair of opposed dies.

It is one object of the present invention to provide an improved machine for joining a plurality of sheets of paper together which is automatic in a sense that the mere starting of the machine by the pressing of a suitable control will cause the machine to provide a complete cycle of operation and then automatically stop in condition to receive another stack of sheets.

Another object of the present invention is to provide an improved machine for joining a stack of sheets of paper together by the action of opposed dies which is highly efficient in that it possesses a plurality of uniquely associated linkages which provide a force multiplying effect and therefore permit the electric motor which drives the pair of opposed dies to be relatively small.

A further object of the present invention is to provide an improved machine for joining a plurality of stacked sheets of paper together which is capable of operating efficiently on either a relatively few sheets or relatively many sheets by virtue of a simple adjustment which sets the machine up for optimum operation under all circumstances. Other objects and attendant advantages of the present invention will readily be perceived hereafter.

The present invention relates to an improved machine for joining a plurality of sheets of paper to each other by forcing portions of said sheets into interlocking relationship by the action of opposed dies. A housing containing a motor therein is provided with a suitable control arrangement for actuating the motor to cause it to start and stay in operation until after a paper joining action has been completed. The motor is coupled to a gear reducer which in turn has an output shaft mounting a first cam which drives a cam follower mounted on the pivotal connection between the two links of a toggle linkage having a first end thereof affixed to the housing of the machine. As the cam rotates the toggle linkage will tend to straighten and cause a first-class lever to pivot by virtue of having one of the links of the toggle linkage attached thereto. A die is effectively mounted on the opposite end of the first-class lever from the toggle linkage and this die moves into mating engagement with a die mounted on an anvil on the machine to thereby press select portions of a plurality of superimposed sheets of paper together and thereby effect a joining operation. The motor will continue to operate until such time as the movable die returns to its original position and will thereafter automatically stop. Because of the placing of the toggle linkage and the third-class lever in series, a relatively large/ multiplying effect is obtained so that a relatively small motor can be utilized to provide suflicient force to effect proper paper joining. Furthermore, the toggle linkage has an adjustment associated therewith to vary the amount which the toggle link straightens and therefore vary the length of travel of the movable die to thereby adjust the machine for optimum operation on different thicknesses of paper in an extremely simple and convenient manner. The present invention will be more fully understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:

FIGURE 1 is a side elevational view of the improved machine of the present invention;

FIGURE 2 is a view partially in cross section taken substantially along line 2-2 of FIGURE 1;

FIGURE 3 is a schematic wiring diagram showing the manner in which the control arrangement for the automatic paper joining machine operates;

FIGURE 4 is a cross sectional view showing the relationship between the motor output shaft and the linkage which drives the movable die, this view being taken substantially along line 4-4 of FIGURE 2;

FIGURE 5 is a view partially in cross section taken along line 5-5 of FIGURE 4;

FIGURE 6 is a detail view partially in cross section taken substantially along line 66 of FIGURE 4;

FIGURE 7 is a view similar to FIGURE 4 but showing the orientation between the various linkages when the toggle linkage is in its most straight position whereas FIGURE 4 showed the toggle linkage in its most bent position;

FIGURE 8 is a view taken substantially along line 88 of FIGURE 4;

FIGURE 9 is a fragmentary enlarged view showing the relationship between the movable and stationary dies; and

FIGURE 10 is a schematic view showing the movable and stationary dies in position joining a plurality of sheets of paper located therebetween.

The improved paper joining machine 16 of the present invention includes a base 11 having a peripheral upstanding rim 12 for receiving spaced screws 13 which secure cover 14 to said base 11. A fiat headed screw 15 (FIG- URE 4) extends upwardly through bottom of base 11 and is received in mating tapped aperture 16 which is located in base 17 of linkage housing 18 for the purpose of securing said linkage housing to said base 11.

An electric motor 19 is provided having gear reducer 20 coupled thereto with an output shaft 21 extending from the gear reducer into linkage housing 18, and journalled in bearings 21' and 22" of the latter. A leg 22 (FIGURE 2) extends from the bottom of gear reducer 20 and rests on base 11 and is secured thereto by nut and bolt 23. Gear reducer 20 is attached to linkage housing E18 by screw 29 (FIG. 8) and other screws (not shown) extending between housing 18 and gear reducer 19. Screw 16 and nut and bolt 23 firmly secure the motor 19 and the attached gear reducer 20 and linkage housing 18 to base 11.

When it is desired to join a plurality of sheets of paper 22 (FIGURE 10) together it is merely necessary to place them on anvil 24 between lower die 26 and upper die 27. An inclined feeding edge 25 leading to anvil 24'- facilitates the insertion of the sheets between the dies. Lower die 26 is held on anvil 24 by clamp 28 which is secured to the anvil proper 29 by screws 30 (FIGURE 7). To determine the length of paper which can be inserted into slot 31 between dies 26 and 27, an adjustable paper stop 32 is provided which is secured to linkage housing 18 by screw 33. A tab 34 extends laterally from stop 32 (FIGURE 2) and has a slot 35 therein (FIGURE 1) which permits guide 32 to be moved from right to left within the limits of slot 31 to thereby provide the desired positioning of guide 32.

Once the plurality of sheets of paper have been positioned between dies 26 and 27 in the above described manner, the machine is actuated to provide an automatic cycle of operation wherein upper die 27 will be caused to move downwardly into joining engagement with lower die 26 while sheets of paper 22 are located therebetween to thereby cause the corrugating action of dies 26 and 27 to join the sheets of paper together and thereafter die 27 will automatically return to a stopped position which is remote from die 26 to permit the joined stack of papers to be withdrawn and another stack of papers to be inserted. a

In order to initiate the joining operation, a starting lever 36 (FIGURE 1) is provided outside of main housing 14 and this lever is mounted on shaft 37 (FIGURES 1, 2, 4 and 6). The inner end of shaft 37 mounts an arm 38 which. is rotated when switch arm 36 is rotated. Switch arm 36 is rotated in a clockwise direction in FIGURE 1 by depressing tab portion 38' thereof. The foregoing pivotal action of switch arm 36 is effected against the bias of the spring 39 affixed between pin 40 extending from shaft 37 and pin 41 extending from linkage housing 18. Arm 38, upon being pivoted, will engage switch arm 42 of switch 43 secured to boss 44 extending from side 45 of housing 18 and cause said switch arm 42 to complete a circuit which initiates operation of electric motor 19.

' As can be seen from FIGURE 3, upon movement of arm 38, switch arm 42 carrying contact 46 thereon will move into engagement with contact 47 to thereby cause a circuit to be completed from L-1 through lead 48, fuse 49, lead 50, lead 51, contact 47, contact 46in engagement therewith, switch arm portion 52, lead 53, motor armature 54, lead 55, arm 56, contact 57, contact 58, lead 59, lead 60, field winding 61, and lead 62 back to the electric current source L-2.

As soon as rotation of motor 19 is initiated by completion of the foregoing circuit, shaft 21 will rotate in a counterclockwise direction (in the direction of the arrow) in FIGURE 4 and cause rounded cam surface 63 of cam 64, which is mounted on shaft 21, to move into engagement with switch arm 42 to thereby maintain the foregoing circuit. The circuit is maintained notwithstanding that starting lever 36.has been released and arm 38 no longer depresses arm 42 (FIGURE 4). The rotation of shaft 21 in a counterclockwise direction will continue all the while that rounded carn surface 63 of cam 64 maintains switch arm 42 in a position where contact 46 (FIG- URE 3) thereon is in engagement with contact 47.

In addition to cam 64, a cam 65 is also keyed to shaft 21 and this cam has an outer surface 66 which is in engagement with cam follower 67 (FIGURES 4, 7) which is mounted on pin 68 joining links 69 and 70, which, in combination, form a toggle linkage. More specifically in the foregoing respect, the lower end of link 69 is pivotally mounted on shaft 71 having its outer ends 72 and 73 (FIGURE 6) journalled in walls 74 and 75, respectively, of linkage housing 18 (FIGURE 6). As cam 66 rotates in a counterclockwise direction with shaft 21, cam follower 67 will move from the position shown in FIG- URE 4 to the position shown in FIGURE 7 when the high point 76 of cam 65 is in engagement with cam follower 67. Because the lower end of link 69 is aflixed to housing 18, the upper link 70 will assume a more vertical position shown in FIGURE 7, or in other words, the toggle links 69, 70 will straighten out under the action of cam 65. In so doing, the upper end 77 of link 76 will rise from the position shown in FIGURE 4 to the position shown in FIGURE 7 and carry the left end 78 of firstclass lever 79 upwardly because of the pin 8 coupling link 70 to lever 79. In other words, lever 79 will be caused to pivot in a clockwise direction about pin 81 mounted between walls 74 and 75 of housing 18. Wall 74 is part of a dished member and wall 75 is essentially a cover which is secured thereto by screws, not numbered. The pivotal movement of lever 79 is effected against the bias of spring 82 located between top wall 83 of housing 18 and the left side of lever 79.

The upward movement of the portion of lever 79 to the left of pin 81 in FIGURE 4 will be accompanied by a corresponding downward movement by a portion of lever 79 to the right of pin 81. This portion has a pin 84 extending through it for joining elongated link 85 to the right end of lever 79. As elongated link moves downwardly with the right end of lever 79, die 27 which is affixed to the lower end of link 85 will move downwardly toward die 26 mounted in the anvil 24 of the machine. At this point it is to be noted that die 27 is held in the bifurcated lower end of link 85 by screw 86, and that link 85 is guided for vertical movement by side portions 85' and 85" of housing 18.

It will be appreciated that when the high point 76 of cam 65 is in engagement with toggle roller 67, die 27 will reach bottom dead-center and sheets of paper 22 will be joined by the action of dies 26. and 27. As cam 65 continues its counterclockwise rotation, cam follower roller 67 will move onto cam portion 87 and will move to the right in FIGURES 4 and 7 because at this time spring 82 will be permitted to expand. Thus, upper die 27 will move upwardly away from lower die 26 as link 85 moves upwardly in response to the counterclockwise rotation of lever 79 about pin 81.

It will be noted at this time that the toggle linkage 69-70 in conjunction with the first-class lever 79 having an extremely long arm to theleft of pin 81 and an extremely short arm to the right of pin 81 provides an extremely high force-multiplying arrangement to cause any force produced as a result of output motor 19 to be realized in a greatly magnified quantity at die 27, thereby permitting a relatively small motor 19 to be utilized. Furthermore, an inspection of FIGURES 5 and 6 indicates that inwardly extending portions of the opposite sides of the housing are provided to prevent links 69 and 70 from tilting laterally.

The rotation of cam 63 will continue in a counterclockwise direction after toggle linkage 69-70 starts to fold from its straightened position shown in FIGURE 7 toward its bent position shown in FIGURE 4 until such time as the flat portion 88 (FIGURE 7) of cam 63 reaches switch arm 42, at which time contacts 46 and 47 (FIG. 3) will separate and contact 46 will move into engagement with contact 90.

As noted above, it is cam 64 (FIG. 6) which actuates arm 42 of switch 43. However, it can be seen from FIG- URE 8 that a switch 91, mounted on boss 91' by screws 92', has a switch arm 92 for engagement by the surface of cam 65. Only the high point 76 of cam 65 will move switch arm 92 sufficiently to actuate switch 91. However, this engagement is not effected until after cam surface 63 loses engagement with switch arm 42 of switch 43,'as will become apparent hereafter.

After contacts 46 and 47 of switch 43 separate and before high point 76 of cam 65 engages switch arm 92 of switch 91, the circuit will remain in the condition shown in FIGURE 3 where there is no completion of said circuit, and therefore motor 19 will coast in view of the momentum achieved by it while it was energized. Its momentum will carry it until the point is reached where high point 76 of cam 65 engages switch arm 92 and causes contact 57, controlled by switch arm 92, to move into engagement with contact 93 (FIG. 3).

The circuit through motor 19 will therefore be reversed in that flow of current will be from L1 through lead 48, fuse 49, lead 50, lead 94, now closed contacts 93 and 57, switch arm portion 56, lead 55, armature 54, lead 53, switch arm portion 52, now closed contacts 46 and 90, lead 95, lead 60, field winding 61 and lead 62 to L2. It can thus be seen that the flow of current through motor 19 is reversed in direction relative to the flow therethrough when the motor is operating as a result of the actuation of switch 43 by cam surface 63. This reversal is necessary to stop motor 19 in its desired position because its high torque would carry it beyond its position if such reversal were not relied on.

The reversal of flow of current through motor 19 by virtue of the completion of the above described circuit will provide a braking action which will slow the motor down and reverse it to overcome its momentum in the opposite direction. However, switch arm 92 will be engaged by high point 76 of cam 65 only momentarily and after a very slight movement of motor 19 in reverse, which causes shaft 21 to move in a clockwise direction in FIG- URE 4, switch actuating contact between high point 76 of cam 65 and switch arm 92 will be lost. At this time cam surface 63 will also not be in engagement with switch arm 42 of switch 43 and switches 43 and 91 will assume their positions shown in FIGURE 3 where flow of current through the armature 54 and field winding 61 is terminated. The motor 19 will therefore stop. Of course it will be appreciated that at this time the upper die 27 will be in its top dead-center position to permit a stack of joined papers to be removed from between dies 26 and 27 and a new stack to be placed between the dies 26 and 27. Upon the pivoting of starting lever 36 in a clockwise direction in FIGURE 1, the above described sequence of operation will again be initiated to cause die 27 to move downwardly into engagement with die 26 to join the plurality of sheets of paper therebetween.

In accordance with the present invention, a unique arrangement is provided for adjusting the pressure with which upper die 27 moves into engagement with lower die 26. This arrangement is best shown in FIGURES 1, 2, 4, 5 and 6. More specifically, a knob 96 extends outwardly of housing 14 and is attached to a keyed portion of shaft 71 by screw 97 (FIGURE 6). It can be seen from FIGURE 6 that the ends 72 and 73 of shaft 71 are concentric and are journalled in opposite sides 74 and 75, respectively, of housing 18. However, the central portion 97 of shaft 71 is eccentric with respect to end portions 72 and 73.

Therefore the rotation of shaft 71 by the manipulation of knob 96 will result in the raising or lowering of the central portion 97 of shaft 71 (FIGURE 4). It will be appreciated, therefore, that the lower the central portion 97 of shaft 71 is when in its adjusted position, the lower will be end 78 of lever 79 when the toggle linkage 6970 is in its straightened position, and therefore movable die 27 will be further from stationary die 26 than if portion 97 of shaft 71 were in its highest position. The purpose of the foregoing adjustment is to adjust the pressure which movable die 27 will exert on stationary die 26 and for adjusting die 27 relative to die 26 for joining different thicknesses of paper. The shaft 71 is retained in its adjusted position by a friction fit between collar 71 pressing on the inside of wall 75 and shoulder 96' pressing on the outside of said wall.

While the illustrated embodiment has been described in conjunction with an electrical circuit which is initiated by the actuation of lever 36 in the above described manner, it will be readily appreciated that a suitable trigger may be located proximate guide 32 for actuation by the paper when fully inserted between dies 26 and 27.

It can thus be seen that the improved paper joining machine of the present invention is manifestly capable of achieving the aboveenumerated objects, and while preferred embodiments of the present invention have been disclosed, it will be appreciated that it is not limited thereto but may be otherwise embodied within the scope of the following claims.

I claim:

1. A machine for joining a plurality of stacked sheets of paper comprising a housing, motor means in said housing, a cam driven by said motor means, a toggle linkage comprising first and second elongated links each having first and second ends, a first pivotal connection for attaching a first end of said first link to said housing, a second pivotal connection joining said second end of said first link to a first end of said second link, a cam follower operatively mounted on said second pivotal connection for engagement with said cam, a first class lever having first and second ends, a third pivotal connection coupling said second end of said second link to said first end of said lever, pivot means intermediate said first and second ends of said lever for pivotally mounting said lever on said housing, a third elongated link, a fourth pivotal connection coupling said second end of said lever to said third elongated link, a first die mounted on said housing, and a second die mounted in opposition to said first die on said second end of said third elongated link, and switch means for energizing said motor means to cause said cam to tend to straighten said toggle linkage and effect pivotal movement of said lever to thereby cause said second die to move into mating engagement with said first die to thereby join a plurality of sheets of paper placed therebetween.

2. A machine as set forth in claim 1 wherein the distance between said third pivotal connection and said pivot means is greater than the distance between said pivot means and said fourth pivotal connection.

3. A machine as set forth in claim 1 including circuit means for causing said motor to cause said second die to move from a position remote from said first die to a position wherein it effects the joining of said sheets of paper and thence to a position remote from said first die and thereafter causes said motor to automatically stop.

4. A device as set forth in claim 3 wherein said circuit includes second switch means actuated by said motor for maintaining a circuit to the motor operative unit said second die reaches its remote position.

5. A circuit as set forth in claim 4 including means for effecting reversal of said motor at approximately said remote position of said die to thereby stop said motor substantially instantaneously and thus insure sufiicient spacing between said dies to permit paper to be placed therebetween.

6. A machine for joining a plurality of stacked sheets of paper comprising a base, a first die mounted on said base, motor means mounted on said base, a gear reducer coupled to said motor means, an output shaft associated with said gear reducer, a link mounted on said "base for movement toward and away from said first die, a second die carried by said link for movement into operative engagement with said first die to thereby press a plurality of sheets of paper lying therebetween into joined engagement, force multiplying linkage means operatively coupling said elongated link and said shaft, means for selectively energizing said motor to drive said elongated link, circuit means for causing said motor means to rotate in a first direction after said energization of said motor means to thereby cause said second die to move from a position remote from said first die to a position in engagement with said first die and thereafter to a position proximate said remote position, and means associated with said circuit means for terminating energization in said first direction and for causing said motor means to momentarily rotate in a second direction which is opposite to said first direction to thereby provide a braking action, said momentary rotation in said second direction causing said second die to stop in said remote position.

7. A machine for joining a plurality of stacked sheets of paper comprising a base, a housing mounted on said base, motor means mounted on said base, a gear reducer coupled to said motor means, an output shaft forming a part of said gear reducer, first and second cams mounted on said shaft, a toggle linkage comprising first and second elongated links each having first and second ends, a first pivotal connection for attaching a first end of said first link to said housing, a second pivotal connection joining said second end of said first link to a first end of said second link, a cam follower operatively mounted on said second pivotal connection for engagement with said first cam, a first class lever having first and second ends, a third pivotal connection coupling said second end of said second link to said first end of said lever, pivot means intermediate said first and said second ends of said lever for pivotally mounting said lever on said hous ing, a third elongated link, a fourth pivotal connection coupling said second end of said lever to said third elongated link, a first die mounted on said base, a second die mounted in opposition to said first die on said second end of said third elongated link, first switch means for energizing said motor means to cause said shaft to rotate and thereby cause said first cam to tend to straighten said toggle linkage and effect pivotal movement of said lever to thereby cause said second die to move into paper joining engagement with said first die to thereby join said plurality of stacked sheets of paper placed therebetween, first switch means mounted on said housing for engagement by said second cam after rotation of said shaft has been initiated to thereby maintain said motor means energized for a predetermined amount of rotation of said shaft and thereafter to permit said motor means to become deenergized, and second switch means mounted on said housing for engagement by said first cam after said motor means becomes deenergized to thereby reverse the direction of rotation of said motor to thereby provide an instantaneous braking action when said second die is at a position remote from said first die, said reversal of the direction of rotation causing said shaft to move said first and said second cams to a position where they are out of actuating engagement with said second and first switch means, respectively, to thereby cause said second die to stop in a position remote from said first die to permit the placement of a plurality of stacked sheets therebetween for a subsequent joining action.

8. A machine for joining a plurality of stacked sheets of paper comprising a base, a housing mounted on said base, motor means mounted on said base, a first die mounted on said base, a second die mounted on said housing, linkage means mounted on said housing and joining said motor means to said second die to thereby cause said second die to move toward said first die to join said plurality of sheets and control means for selectively energizing said motor to move said second die toward said first die from a position remote from said first die to thereby efiect a joining action of said stacked sheets and to automatically cause said second die to return to said position remote from said first die comprising means for energizing said motor means in a first direction to drive said second die from said remote position to said position wherein said plurality of sheets are joined and thereafter continue driving said second die until it reaches a position proximate said remote position, and means for momentarily reversing the direction of rotation of said motor when said second die is proximate said remote position to provide an instantaneous braking action and thereafter entirely terminate rotation of said motor when said second die reaches said remote position.

9. A machine for joining a plurality of stacked sheets of paper comprising a base, a housing mounted on said base, motor means mounted on said base, a gear reducer coupled under said motor means, an output shaft associted with said gear reducer, a first die mounted on said base, a second die, linkage means mounted on said housing for effectively coupling said shaft to said second die to thereby cause said motor means to drive said second die toward and away from said first die, cam means mounted on said output shaft, first switch means actuated by said cam means for driving said motor means in a first direction to thereby cause said linkage means to move said second die from a position remote from said first die to a position wherein it etfects said joining engagement and thereafter moves said second die to a position proximate said remote position, and second switch means actuated by said cam means for reversing said motor when said second die approaches said remote position to thereby provide an instantaneous braking action, said cam means including means for causing said first and second switch means to be deactuated when said second die reaches said remote position to thereby cause said motor to cease rotating when said second die is in said remote position to thereby cause said second die to be spaced from said first die an amount which is sufiicient to permit the insertion of a stack of papers therebetween.

10. A machine for joining a plurality of stacked sheets of paper as set forth in claim 9 wherein said cam means includes first and second cams and wherein said first switch means is actuated by said first cam and said second switch means is actuated by said second cam, and

third switch means for manually effectively actuating said first switch means to initiate rotation of said motor means until said second cam means engages said second switch means to maintain said motor rotating in said first direction notwithstanding the subsequent deactuation of said third switch means which initially caused said motor to rotate.

11. A machine for joining a plurality of stacked sheets of paper comprising a base, a first die mounted on said base, motor means mounted on said base, a second die, linkage means operatively coupling said motor means to said second die for movement toward and away from said first die to thereby effect a joining of said stacked sheets therebetween, and control meansfor initiating operation of said motor means and effecting rotation thereof in a first direction to drive said second die from a position remote from said first die to a position proximate said first die to join said plurality of stacked sheets while said motor means rotates insaid first direction, second means for deenergizing said motor means after said joining of said sheets has been elfect'ed to thereby cause said motor means to coast under its own momentum, and third means for momentarily energizing said motor in a second direction which is opposite to said first direction when said second die is proximate said remote position to thereby effect a substantially instantaneous braking action, and means for terminating said rotation of said motor in said second direction while said motor remains deenergized from rotating in said first direction, to thereby cause said second die to stop in said remote position.

References Cited UNITED STATES PATENTS 2,155,629 4/1939 Zaveruka 83524 X 2,275,111 3/1942 Noll 93-l.'l 2,678,589 5/1954 Pollard et a1 931.1 X 2,851,888 9/1958 Scholin 83630 X FOREIGN PATENTS 411,041 3/1925 Germany. 270,404 1/ 1930 Italy.

WILLIAM' W. DYER, 1a., Primary Examiner.

JAMES M. MEISTER, Examiner.

Claims (1)

1. A MACHINE FOR JOINING A PLURALITY OF STACKED SHEETS OF PAPER COMPRISING A HOUSING, MOTOR MEANS IN SAID HOUSING, A CAM DRIVEN BY SAID MOTOR MEANS, A TOGGLE LINKAGE COMPRISING FIRST AND SECOND ELONGATED LINKS EACH HAVING FIRST AND SECOND ENDS, A FIRST PIVOTAL CONNECTION FOR ATTACHING A FIRST END OF SAID FIRST LINK TO SAID HOUSING, A SECOND PIVOTAL CONNECTION JOINING SAID SECOND END OF SAID FIRST LINK TO A FIRST END OF SAID SECOND LINK, A CAM FOLLOWER OPERATIVELY MOUNTED ON SAID SECOND PIVOTAL CONNECTION FOR ENGAGEMENT WITH SAID CAM, A FIRST CLASS LEVER HAVING FIRST AND SECOND ENDS, A THIRD PIVOTAL CONNECTION COUPLING SAID SECOND END OF SAID SECOND LINK TO SAID FIRST END OF SAID LEVER, PIVOT MEANS INTERMEDIATE SAID FIRST AND SECOND ENDS OF SAID LEVER FOR PIVOTALLY MOUNTING SAID LEVER ON SAID HOUSING, A THIRD ELONGATED LINK, A FOURTH PIVOTAL CONNECTION COUPLING SAID SECOND END OF SAID LEVER TO SAID THIRD ELONGATED LINK, A FIRST DIE MOUNTED ON SAID HOUSING, AND A SECOND DIE MOUNTED IN OPPOSITION TO SAID FIRST DIE ON SAID SECOND END OF SAID THIRD ELONGATED LINK, AND SWITCH MEANS FOR ENERGIZING SAID MOTOR MEANS TO CAUSE SAID CAM TO TEND TO STRAIGHTEN SAID TOGGLE LINKAGE AND EFFECT PIVOTAL MOVEMENT OF SAID LEVER TO THERBY CAUSE SAID SECOND DIE TO MOVE INTO MATING ENGAGEMENT WITH SAID FIRST DIE TO THEREBY JOIN A PLURALITY OF SHEETS OF PAPER PLACED THEREBETWEEN.

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