Sept. 24, 1946. 5.0. MCFARLANE 2,407,992 PLAN FOLDING MACHINE Filed March 11, 1944 @7/?!V 2 Sheets-Sheet l > ‘ \n." mmvrm ’ EDWIN C.M€FARLANE BY ‘ @Mm' Kai; ATTORNEY ‘ Sept 24, 1946- E. c. MCFARLANE 2,407,992 PLAN FOLDING MACHINE Filed March 11, 1944, 5V 2 sheets-sheet 2 v/ INVENTOR. EDW/N C. MS-‘FARLANE BY ‘ATTORNEY Patented Sept. 24, 1946 2,407,992 UNITED STATES PATENT OFFICE 2,407,992 , PLAN FOLDING MACHINE ‘ Edwin C. McFarlane, Brooklyn, N. Y. Application March 11, 1944, Serial‘No. ‘526,097 3 Claims. ( U1. 270—-'73) 1 2 In industrial plants and in manufacturing and . widely varying widths without adjustment as to ‘building operations large numbers of plans fre width. quently have to be handled. These are commonly in the form of photostats or blueprints, some of which are of a size which necessitate that they ‘ Features of the invention, other than those adverted to, will be apparent from the herein after detailed description and claims, when read conjunction with the accompanying drawings. be folded ‘for convenience in ?ling. This work has heretofore been done entirely by hand. ‘ In some plants the number of plans made daily is The drawings illustrate one practical embodi ment of the invention, but the construction so great that a large force is employed expressly therein shown is to be understood as illustrative, for initially folding them after they come from 10 only, and not‘as de?ning the limits of the in vention. . theprinting machines, The work is tedious and Figure 1 is a perspective view showing one when done by hand is seldom if ever uniform. I The object of ‘the present invention is to elimi form of the machine of the present invention.‘ Figure '2' is a ‘fragmental view showing one of the creasing bars retracted to permit :a plan to he introduced betweensaid bar and the‘ folding nate this manual work by the provision of a ma chine which will satisfactorily perform the fold ing operations on plans in such an e?ic‘ient man platform. ner that one operator can do the ,workwhich heretofore required a‘ dozen or more persons to manually perform. ‘ 4 The machine of the present invention is so con ‘ Figure 3 is a view similar to Figure 2, but illus trating the creasing bar in normally active po— 20 sition.‘ , Figure 4 is a fragmental elevation looking from the right hand side of Figure 3. Figure‘ 5 is a fragmental plan looking down on manner as to retain folded condition when re Figures‘ 3 and 4. moved from the machine and to do this work in Figure 6 is a vertical, longitudinal section a uniform manner, so that they will properly fit 25 through the machine shown in Figure 1 ‘with the into the filing requirements of the plant. central portion of the machine broken away. In one of its practical forms,‘ the machine of Figure 7 is a fragmental elevation looking from this invention comprises an arcuate folding plat the right hand of Figure 6 and showing the form. A pair of parallel creasing bars overlie the platform in substantially parallel relation to the :2: means‘ for adjusting the length of the fold. Figures 8, 9 and 10 are diagrammatic views axis of its curvature and a pair of parallel fold showing successive positions of the operating ing bars are mounted to move back and forth parts in folding a plan, with a fold of one par over the platform to carry successive portions of ticular length. ' ‘ > a plan from one creasing bar to the other, and Figure 11 is a like view showing ‘adjustment of vice versa, and to tuck the plan beneath said the parts to produce a fold of a different length. creasing bars in succession. The creasing bars stituted that, when operated, it will manipulate plans into flat accordion folds, creased in such are lifted in proper timed relation to the opera tions of the folding bars to permit the plan to be introduced beneath them, but are spring im pelled in the direction‘of the platform, so that when released, they press the plan against the platform to form a fold therein and hold the already folded portion of the plan in position while the next fold is being performed. The machine may be conveniently operated manually by a crank and after one end of a plan has been fed into the machine, movement of the crank will cause the ‘machine to automatically manipulate the plan until it is completely folded. ~ Figure 12 is a perspective view of a folded plan. The machine as shown in the drawings com prises an arcuate folding platform I preferably, ‘although not necessarily, curved on the arc of a ‘circle to embody a substantially semi-cylindrical tubular‘structure, the opposite ends of which are closed by end walls 2, ‘It is convenient to provide an appropriate base 3. Extending longitudinally between the end walls 2 and projecting through and beyond them is a pivot rod 4 and-pivoted to this rod externally of'each end ‘wall 2‘ are‘two links 5 and 6.‘ The inner ends of the links Sand 5 are pivoted to the rod ll and beyond ‘the surface of the folding plat The folded plan may then be removed and the form i the ‘corresponding links1 at the opposite next plan introduced and folded in the same ends of the'machine ‘are connected ‘together by manner. Provision is made for adjusting the rods '1 and‘ 5, respectively. These rods pass width of the fold to meet ?ling requirements and through brackets S'pfor’mped on the under sides of the machine is constructed to handle plans of 55 creasing bars It and H. r The‘ bar It) may be con 3 4.1 of course its companion 30) shifted appropri veniently referred to as the left hand creasing ately to produce a shorter fold. It will of course bar and the bar I I, as the right hand creasing bar. be understood that normally the nut 31 is tight These bars overlie the folding platform I and are ened, so as to produce su?icient friction between faced on their under sides with soft rubber strips I2 to better adapt them to grip a plan between C1 the adjusting disks and the cavities 3| in which they are contained, to preclude inadvertent shift them and the folding platform. ing of these disks and that the nut is only loos The rubber facings of the bars are normally ened when a change of adjustment is desired. held in contact with the folding platform by Positioned at each of the opposite ends of the springs 83 coiled around the rods 1 and 8, with one end of each spring hooked about theadjacent 10 machine are two upstanding v‘folding bar car rying arms 39 and 40.’ The arms 39 at the op-> link 5 or 6 ‘and the other end of the spring hooked posite ends of the machine are both ?xed at their about the bracket 9 of the creasing bar, as best lower ends to a rock shaft 4| which passes di shown in Figures 3-5 inclusive. The springs l3 rectly through the machine, so that when the are tensioned so as to permit the rubber facings to tightly grip the plan against the platform at all 15 rock shaft is oscillated by a crank 42 also secured times save when the creasing bars are swung ‘back on their pivot rods 1 or 8 for reasons presently to be explained. This disengagement of the creasing bars with the folding platform may be accomplished in two ways. First, by the opera .tion of cam members l4 and I5 which are rigidly mounted at the opposite ends of the respective creasing bars or by means of releasing handles .l 6 and I‘! with which said bars are provided. The releasing handles are pivotally secured to the re spective creasing barsby means of pivot screws l8, .to said shaft, both of the arms 39 will be simul taneously oscillated about the axis of said shaft. The arms 40 at the opposite ends of the machine maybe likewise secured together, but this is not necessary and in practice they are merely se- . cured by pivots 42 to the end walls of the machine. bar, so .that the creasing bars may be selectively On the upper ends of the arms 39 and 40 are eyelets through which are passed a pair of par allel rods which pass externally of the eyelets through spacing blocks 43 and are headed over as shown .at 44. On these rods are mounted folding bars 45 and 45 which are provided at their op posite ends with cam operating rollers 4'! and disengaged from the platform by grasping the 48. These rollers, are adjacent the inner faces positioned normal to the upper surface of each handles It or 7|‘! and rocking the ‘bars upwardly 30 of the eyelets on the upper .endsof the arms 39 and 4B and are spaced apart for cooperation with , on their pivot rods 1 or 8 against the tension of the springs l3. When desired the creasing bars may be locked in these raised or retracted posi tions by engaging the cupped inner end IQ of an enlargement 20, formed on each handle, with a u conical head rivet 2| carried by the outer end of each of the links 5 and 6, as shown in Figure 2. The position of the creasing ‘bars circumferen tially of the folding platform is controlled by links the cam members l4 and I5, as will be presently explained. For convenient reference the folding bar 45 may be termed the left hand folding bar 7 and the bar 45, the right hand folding bar. In the drawings the spacing blocks 43 are shown 3 as spacing the upper ends of the arms 39 and 443 the same distance apartv as the lower ends of these arms, so that said arms are parallel at all times. .If desired, however, these bars may be 22 and 23. These links are secured by pivots 24 other than parallel without departing from this and 24 to intermediate portions of the links 5 invention. The essential criterion is that: When 7 and 6. This arrangement is duplicated at both the parallel folding bars 45 and 46, conjointly endsof the machine. The outer ends of the links move to the left in Figure 1, under the impulse of 22 and 23 are provided with stops '25 ‘and 26, the ‘purpose of which will be presently explained, 45 the crank 42, the rollers 48 of the right hand folding bar 46 will engage with the underv sides while the inner ends of said ‘links are connected to of the cams i4 and retract the left hand creasing pivots 27 and 28 carried by adjusting disks 29 bar I!) to permit the folding bar 43 to move into a and 33,, positioned, respectively, at opposite ends position beneath the creasing bar ID, i. e., be of the machine. The adjusting disks 29 and 3,0 are best shown 50 tween said creasing bar and the platform, as shown in Figure 10, and when the folding bars in Figures 6 and '7. They are set into recesses 3| move to the right in Figure 1, under the impulse in the opposite end walls and are held in such of the crank, the rollers 41 of the left hand fold recesses by a shaft 32 which extends entirely ing bar 45 will engage with the under side of the through the machine. This shaft is in the nature cams l5 of the right hand creasing bar II and of a bolt, the head of which is formed by a key retract the latter, so that the folding bar 45 may 33 which extends through a slot in the shaft move into a position beneath said right hand and is received in a slot 34 in the disk 30, by vir creasing bar I I, i. e., between said creasing bar tue of which the disk is locked for rotation with and the platform, as shown in Figure 9. It'is by the shaft 32. The other end of the shaft is locked to the disk 60 virtue of these operations that the folding of a plan is accomplished, . 29 by a pin 35 passed through a hole in the shaft The machine operates in the following man and projecting into a cross-axial slot 36 in the ner: The plan, designated P in Figures 8-10, is disk 29. This end of the shaft is threaded and threaded between the folding bars 45 and 45, as receives a nut 31. When the nut is loosened, an shown in Figure 8, and the forward’ end of the appropriate wrench may be introduced into holes plan is placed beneath the rubber facing of the 38 in the disk 29 and this disk may be turned to left hand creasing bar l9. Duringrthis operation, simultaneously turn the disk 30 for the purpose of shifting the positions of the pivots 21 and 28 the ‘handle I6 is manipulated in the manner and thus angularly adjusting the levers 5 and 6 in described, to retract the rubber facing of this creasing bar, so that the end portion of the plan order to adjustthe creasing bars l0 and I I, so can be introduced between the rubber facing and that they are closer together or further apart, according to the length of the fold desired. Fig the folding platform. When thus positioned the ures 8-10, inclusive, show the‘ position of the piv handle is released, so that the end of the plan is gripped against the platform.‘ The parts are ots 72'! and 23 ‘for a particular length of fold, while ‘Figure 11 shows the adjusting disk 29 (and then in thepositions shown in Figure 8; ' 5 2,407,992 If the main operating handle 42 is now oscil lated in a clockwise direction, the folding bars will move to the right until the rollers 47 of the left hand folding bar 45 engages with the cams l5 whereupon further movement of the folding 1. A plan folding machine comprising: a fold ing platform, right hand and left hand creasing bars extending transversely of said platform and normally impelled into contact therewith, right bars in the same direction will cause the right parallel relation to one another and to the creas hand and left hand folding bars arranged in hand creasing bar to be retracted to permit the left hand folding bar 45 to tuck the plan beneath the creasing bar II, as shown in Figure 9. ing bars, means for mounting said folding bars for conjoint movement back and forth over the platform in a direction normal to both the creas If the handle is now oscillated to the left in a 10 ing and folding bars to alternately bring the left counterclockwise direction, the rollers 41 will hand folding bar between the right hand creas release the right hand creasing bar I l and permit ing bar and the platform and the right hand it to drop down under the tension of spring l3 folding bar between the left hand creasing bar on to the plan, thereby forming the subjacent and the platform, means for. s0 moving said fold loop in the plan into a crease and tightly grip 15 ing bars, cam members associated with the creas ping the plan while the handle continues to move ing bars, and rollers movable with the folding to the left. During the movement of the handle bars to lift the creasing bars from engagement to the left the folding bar 46 will feed the plan with the platform and permit such folding bars back across the surface of the folding platform to enter between said creasing bars and the until the rollers 48 engage with the cam l4, re tract the latter and allow the right hand folding bar 46 to tuck the plan beneath the left hand creasing bar Ell, as shown in Figure 10. The handle 42 is thereupon again moved to the right 20 platform. 2. A plan folding machine comprising: a sub stantially semi-cylindrical housing the curvilinear surface of which constitutes a folding platform, carrier links pivoted to the opposite ends of the and the operations described are repeated as the 25 housing substantially concentric with the curva handle is moved back and forth to feed succes ture of the platform, right and left hand creas sive portions of the plan back and forth across ing bars pivoted to said carrier links with springs the platform in superimposed relation. The rollers 4'! and 48 will retract the creasing bars bearing against the creasing bars to normally impel them toward said platform, right and left as the handle approaches the termini of its 30 hand folding bars connected for conjoint opera travel, and as these rollers leave the respective tion and parallel to one another and to the creas cams, the looped portions of the plan will be ing bars and individually mounted on the oppo creased, so that by the time the handle has been site ends of the housing for pivotal movement operated su?iciently to feed all of the plan across back and forth over the platform in a direction the platform, the folding of such plan will be complete and the planin ?nished folded condi tion will be in the grip of the two creasing bars. It may be released from said bars by operating the handles I‘! in the manner hereinbefore de scribed, whereupon the plan may be lifted off of the machine and a new .plan introduced for repetition of the operations hereinbefore de scribed, to accomplish the folding of the same. The stops 25 and 26 to which I have referred normal to both themselves and the creasing bars to alternately bring the left hand folding bar between the right hand creasing bar and the platform and the right hands folding bar between the left hand creasing bar and the platform, means for so moving said folding bars, adjusting links connecting the carrier links to adjusting means at the opposite ends of the housing for varying the distance between the creasing bars, and stops on the adjusting links to limit the are to preclude overtravel of the arms 39 and 4!! 45 movement of the folding bars according to the in opposite directions, as indicated in Figures 9 positions of the creasing bars. and 10. These stops are preferably faced with rubber, so that when contacted by the arms no 3. A plan folding machine comprising: a sub stantially semi-cylindrical housing the curvilin noise will result. ear surface of which constitutes a folding plat The machine of this invention may be oper 50 form, carrier links pivoted to the opposite ends ated at considerable speed. In practice it is not of the housing substantially concentric with the uncommon for experienced operators to fold curvature of the platform, right and left hand plans 30" wide and 10 ft. long in less than 20 creasing bars pivoted to said carrier links, right seconds. Such manipulation of plans is impos and left hand folding bars connected for conjoint sible by the old hand method. In fact, the ma 55 operation and parallel to one another and to the chine of this invention can accomplish over any creasing bars and individually mounted on the particular period of time more work and do it opposite ends of the housing for pivotal move more satisfactorily, than could be accomplished ment back and forth over the platform in a direc by many hand operators, and the product is a tion normal to both themselves and the creasing uniform product. 60 bars to alternately bring the left hand folding In the foregoing detailed description I have bar between the right hand creasing bar and the set forth the invention as it has been marketed. platform and the right hand folding bar between I am aware, however, that certain modi?cations the left hand creasing bar and the platform, may be made without departing from the basic means for so moving said folding bars, and ad concept of the invention, the scope of which is 65 justing means common to both the creasing and to be understood as fully commensurate with the folding bars for varying the distance between appended claims. the creasing bars and also limiting the movement Having thus fully described the invention, what of the folding bars accordingly. I claim as new and desire to secure by Letters‘ Patent is: 70 EDWIN C. MCFARLANE.