US1618041A - avery - Google Patents

Description

T. M. AVERY- Feb. 9

BAG MAKING AND PRINTING MAQHINE Filed Sent. 15C, 1925 l3 sheets sheet l 1,618,041 15 1927' T. M. AVERY BAG MAKING AND PRINTING MACHINE Filed Sent. 50. 1925 13 Sheets-Sheet 2 animator 7/ ae M14057 Stratum 1,618,041 Feb. l5 :2 T M. AVERY BAG MAKING AND PRINTING MACHINE I Filed Sgpt. 30, 1925 13 sheets -sheet 5 V 1 618 04? Feb. 15 1927. T NLAVER 1 BAG MAKING ANP PRINTING MACHINE Filed Sept. 30, .1925 13 Sheets-She et 4 l9 1,618,041 h 15 27 T. M. AVERY BAG MAKING AND vPRINTING MACHINE 1" Filed Sent. :50. 1925 13 Sheets-Shed- 5 eb 15 T. M. AVERY I BAGJMAKING AND'PRINTING MACHINE r. :Filed Sept. 30. 1925 13 sheets -shet e /55 66 Show H501 J r Que Feb. 15 1927.

"r. M. AVERY BAG MAKING AND PRINTING MACHINE Filed Sept. 30, 1925 13 $he ets$heet 7 .lll

. uventoz flue fifflw Quartz .v 1,618,043 15 1927' T. M. AVERY I BAG MAKING AND PRINTING MACHINE Filed Sent. 30. 1925 1:5 Sh'eet-Shet a avwamto'a 1927. 1 Feb T. M. AVERY BAG MAKING AND PRINTING MACHINE l SheetQ-Sheet 9 Filed Sept. 50, 1925 Feb. 15 1927- I T. M. AVERY BAG MAKING AND PRINTING NAcHINE "i3 Sheets'-Sheet 10 Filed Sept. 30, 1925 than,

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1927. Feb 15 I T. M. AVERY BAG MAKING AND PRINTING MACHINE 1s sheets-Sheet 11 Filed Sent. 30, 1925 f 1,618,041 15 1927' T. M. AVERY BAG MAKING AND PRINTING MACHINE Filed Sept. 50, 1925 v 13 shegts-fihegt 12 F167: 5 7. 24$ 7 Y- 24.9 //l 17 T 24/ awuento'v i U a; waxy/7 11 M. AVERY BAG MAKING AND PRINTING MACHINE Filed Sept. 50, 1925 13 sheets-sheet 1s lnllllll Ill lllll Patented Feb. 15, 1927.

i hearse TRUE M. AVERY, OF GLENS FALLS, NEW YORK, ASSIG-NOR TO UNION BAG & PAPER CORPORATZON, OF HUDSQN FALLS, NEN YOBI A COBTEORATION OF NEVI YORK.

BAG MAKING AND PRINTING MACHINE.

Application filed September The present invention relates to improvements in machines for making and printing paper bags and it relates more particularly to machines of the class wherein a paper tube is formed and cut into bag-forming sections and the bag sections are passe successively through a printing mechanism which prints labels or other desired impressions thereon.

The primary object of the invention is to provide a novel and improved machine of this class whereby the operations of forming and printing bags are performed rapidly and with certainty, the printed impressions on the bags are accurately and uniformly 'a egistered, especially when impressions in different colors are made, the machine is adjustable to enable it to form and print bags of different lengths, it embodies means for stackingthe finished bags in piles each of a predetermined or counted number, for delivery and the various parts of the machine, particularly the printing mechanism thereof, are easily accessible to the attendant.

To tnese and other ends, the invention con- 'sists in certain improvements and combinations and arrangements of parts, all as will be hereinafter more fully described, the features of novelty being pointed out particularly in the claims at the end of the specification.

Tin the accompanying drawings 2- Figure 1 is a side elevation of a combined bag-forming and printing machine constructed in accordance with the present invention;

Figure 2 is an elevation of the machine, as shown in Figure 1, as viewed from the left-hand end thereof, the beg-delivery mechanism being omitted;

Figure 3 represents a horizontal section through Figure 1, taken on the line 38 of said figure;

Figure ,4 is a detail view, on an enlarged scale. showing the forwarding rolls and their driving and controlling means, as viewed from the left in Figure l;

v Figure 5 is a detail view showing in elevation the main shaft and counter-shaft forming part of the driving means for the breaker arm, the sleeve on the main Sha t 30, 1925. Serial No. 59,668.

through which the breaker arm is driven being shown in section;

Figure 6 is a cross-seetion taken on the line 6G, Fig. 5, showing the driving gearmg for the pinch rolls and the countcrshaft:

Figure 7 is a diagrammatic view of the lower and upper folder rolls and the cooperative forwarding rolls, and the impression roll and the cooperative printing rolls and a portion of the bag-delivery means;

,Figures 8 and 9 are detail views, on an enlarged scale, of the lower folder roll, a portion of the upper folder roll and the cooperative forwarding rolls, the forwarding rolls being shown in operative condition to grip and advance a bag section inFig. 8, and in relatively separated or non-forwarding condition in Figure 9; c

Figure 10 is an enl elevation of the lower folder roll equipped with the creaser blade and paste bar;

Figure 11 is a side elevation of the lower folder roll;

Figure 12 is an end elevation, partly in section, of the upper folder roll:

Figure 13 is a side elevation of the upper folder roll;

Figure la is a detail view showing the periphery of the upper folder roll and illustrating the bag nipping means;

Figure 15 is a detail view of the idler roll which cooperates with the upper folder roll, together with the supporting and controlling means for this idler roll;

Figure 16 is an end elevation of the idler roll and its supporting means, as shown in Figure 15, and as viewed toward the right in said figure, the supporting bracket for the shaft being omitted and a portion of the upper folder roll being shown in cooperative relation with the idler roll;

Figure 17 is a detail view of the dofl'ers which assist in transferring the folded or completed bags from the upper folder roll to the impression roll, together with the smoothing plate which cooperates with the impression roller;

Figure 18 is a view of the doffers and smoothing plate mounted on their supporting shaft;

Figure 19 represents a section on the line i 19-19 of Figure 18, looking toward the right;

Figure 20 is an elevation of the lmpression roll, a portion of the peripheral sur face thereof being broken away to illustrate the supporting and operating means for the grippers;

Figure 21 is an elevation of the left-hand end of the impression roll as shown in Figure 20, parts being broken away;

Figure 22- is an elevation of the right-hand end 'of the impresssion roll, as shown in Figure 20;

Figure 23 is a detail viewof the members of a coupling, one of which serves to connect each gripper to the supporting shaft to effect retraction or opening of the gripper;

Figures 2a and 24L illustrate, respectively, the left-hand and right-hand ends of the delivery mechanism which stacks the finished bags in piles each of a predetermined or counted number;

Figure 25 is a detail view of the triggers and controlling mechanism whereby the delivery mechanism is caused to operate to stack the finished bags in alternate piles; and

Figure 26 is a detail view of the delivery chute or conveyer which conducts the finished bags from the impression roll to the stacking mechanism Figure 27 is a longitudinal sectional View of one of the type or printing rolls;

Figure 28 is a view of the left-hand end of the type roll shown in Figure 27, a portion thereof being broken away;

Figures 29 and 30 are edge views and elevations respectively of one of the pinch bars carried by the type roll;

Figure 30 is a detail view partly in section, illustrating one of the pinch bar actuating springs and its mounting;

Figure 31 is a side elevation of a portion of the inking mechanism Figure 32 is a detail section on an enlarged scale taken longitudinally through the hearing and mounting for one of the ink rolls;

Figure 33 represents a crosssection through the bearing and its mounting, taken on the line 33-33, Figure 32; and

Figure 34 is a detail end view ofthe hearing removed from the u'iounting.

Similar parts are designated byihe same reference characters in the several figures.

The present invention provides a combined bag-making and printing machine which is adapted to form the bags from ha sections which are cut successively from a tube of paper, the bag sections being operated upon by mechanism which forms a fold at one end thereof to produce a closed bot-- tom, the bag thus formed being printed as it is advanced through the machine, and the printed bags are delivered and stacked in piles ready to be removed from the machine. The preferred embodimentof the invention is shown in the accompanying drawings and will be hereinafter described in detail, but it is to be understood that the invention is not restricted to the precise construction shown as equivalent constructions are contemplated. and such will be included within the claims.

The portion of the machine which forms the paper tube from'which the bag lengths or sections are cut may be of the same general type as that illustrated and described in my prior Patent No. 1 539,62 i, granted May 26, 1925. This portion of the machine may be here described briefly as comprising a former 1 which is mounted on and extends longitudinally of the main frame or bed 2 and is adapted to receive a flat strip of paper which is fed to the former and folded aroundit by a folding device 3, in a manner well known to those ami iar with bag-making machines of this general class. The paper tube is fed continuously along the former l by a pair of draw rolls 4-. which grip the paper tube between them, and the portion of the paper tube which has been advanced beyond the serrated severing edge 50s the former is gripped at predetermined periods by bars 6 on upper and lower pinch rolls 6 which operate at such a speed that the pinched portion of the paper tube will be retarded in its movement relatively to its speed between the draw rolls, thus producing slack in the tube between the pinch rolls and draw rolls while it is held by these rolls. The paper tube is severed. at predetermined intervals to term the bag sections by a breaker arm 7 which is fixed to and revolves with a breaker shaft 8 and swings periodically past the severing edge 5 of the former and acts on the slack portion of the paper tube A movable knife 9 is pivoted on a shaft 10 and has an arm 11 arranged to be engaged periodically by a cam 12 fixed on the lower pinch roll shaft 13 whereby the knife 9 will be caused to bear against the lower side of the paper tube on the former 1 adjacent to the severing edge 5 of the former immediately prior tothe swing of the breaker arm past the end of the former this knife operating in conjunction with the severing edge 5 of the former serving to sever the bag length from the remainder of the paper tube on lines which produce the mouth and upper or closing flap of the bag. The construction and, mode of operation of the draw rolls, pinch rolls, the breaker and the movable knife may be substantirlly the same as is fully illustrated and described in my prior patent above referred to except that the movable knife is located at the under side of the former, so that it will sever the lower side of tr e paper tube and the direction of rotation of the breaker arm is reversed, so that in the present instance the breaker arm will swing downwardly past the forward end of revolve in unison and in the The bag-making mechanism thus far dc scribed is, in the present instance, driven from the shaft 13 which is utilized as the lower pinch roll shaft, this shaft being pro vided with a belt pulley l l or other suitable means for receiving power from any suitable source. The draw rolls 4: are connected to "opriate directions by gears 15 and 1b which are fixed on the outer ends to their shafts 1'? and 18, respectively, and one of the u roll shafts, the lower shaft 18, receives otion through the gear 16 which is fixed the an .i meshes with an idler gearlil, the idler being driven from a which i .n the shaft 13. In order t n n an rolls l to be driven at d different lengths for the 11 differentsizes, the 9%: 20 i plied to the shaft -3, so tn;

tions in the ratio of tamed between the draw rolls 4- anrl the 13 enabling the paper tube be ad a greater speed when relatively e shaftvane-ed bags are to be produced and at a relatively slower speed when relatively shorter smaller bags are to be produced. The intermedi te or idler 19 between the s has the bearing stud 1.9 fl t a slot 19 which is concentric 18 of thelower draw roll so that the mediate gear 19 willremain in mesh m the 16 while itis adjusted in its to mesh properly with the different s change gears 2-0 that may he placed on the lower pinch roll shaft The breaker shaft 8 is driven by a bevel. gear 1 iii: t and meshing with a sin'iilar gear the ter being fixed on or formed a part 0' a sleeve which is loosely or revolul y mounted on the shaft 13, this sleeve having a gear 24 which is nesh s with a gear 25 of the same size located beneath it. 0 d on a The gear .45 is counter-shaft 26 mounted in suitable b'e' ings in the bed or main frame 2. Th shaft 13 and the countersha'l't 26 ha "7 and 5255 key or others fir and these are connee. by in :1 2?) so 19 late gear that the shaf jv iii will be connect 1 o revolve in rela 'irely rese directions. Through the driving c= neCtionL-s just described, or other driving; connections, the draw rolls wi. 4 driren in di ections to advance the p s" to the )iiiiii'd end of the former a alter arm will be revolved in d tion which causes to swin downu past the severing edge on the forward eno. of the former and the knife The mo bl knife 9 will be lifted against the lower a can of the paper tube immediately preceding" each severing operation by the cam 12 which 18 fixed on the shaft 13 and cooperates with the flnger 11 which is, in turn, fixed to one end of the shaft 10 which carries the mov-- able knife. Vl hile a paper tube forming and cut-off device substantially similar to those heretofore used generally has been illustrated and described, it will be understood that any other suitable mechanism may be of bags of different lengths, this supplemental frame is adjustable in a direction longitudinally on the stationary main frame or bed 2 whereby the distance between the bag folding mechanism on the supplemental frame and the forward end of the former 1. may be varied to suit the length of bag to be made. As shown, the supplemental frame 30 narrowed at its lower portion to form frame members 31. which are adapted to fit between the sides of the stationary frame or bed 2, these frame members being rigidly connected by a suitable number of transverse members 82, and the upper portion of the supplemental frame 30 occupies a position above the upper edges of the side members of the bed 2 forming rests 33 which are adapted to seat on the upper longitudinal edges of the bed. Any suitable means may be provided for shifting the supplemental frame 30 in a direction longitudinally on the bed 2- and for holding the supplemental frame in any desired position of adjustment. As shown, a nut 34' is fixed on a cross member which is attached to the lower portion of the supplemental frame, this nutbeing arranged to receivea threaded row 36 which is connected to or formed as part of a shaft 37. This shaft is journailed in a. bracketE-SS which is fixed to the relatively stationary bed 2 and has a bevel gear fixed thereon and meshed with a bevel gear as, the latter being fitted to a cross s aft 4-1 which is journaled in suit able boa 18 in the bracket 34 and is extended to one side of the bed and'provided with ahand-wheel 44: by means of which it may be rotated. The screw and nut con nection thus provided between the bed and the longitudinally movable supplemental frame enables the latter to be easily and quickly shifted longitudinally of the bed to adjust it for the making of bags of different le ,g5ths, and when the supplemental frame hasreached any desired position of adjustinent, it will be held in such position by the screw and nut connection. It will be understood, however, that other suitable means may be provided for adjustingthe supplemental frame longitudinally of the bed'and for holding it in different adjusted positions. Each bag section delivered from the bag former is received by upper and lower folder rolls 45 and 46 which are mounted on shafts 47 and 48 which are journaled in suitable bearings in the sides of the supplemental frame 30, the nip of these rollers being located preferably in substantial alinement with the bag former. The lower folder roll is so driven that it makes one revolution for each bag section received by it, the shaft 48 of this roll having a gear 49 idly mounted thereon and arranged to mesh with an intermediate gear 50, which, in turn, meshes with a-gear 51 which is fixed on the shaft 13. The longitudinal adjustment of the supplemental frame 80 will vary the distance between the lower folder rollshaft 48 which is carried by the supplemental frame and the shaft 13 which is mounted in bearings on the station'- ary main frame or bed, but the driving connectlon between these shafts may be maintained by the intermediate gear 50, the bearing studs of which is adjustable in a gear 51. Suitable gearing is provided to connect the lower folder roll shaft with the shaft 47 of the upper folder roll. Preferably, the upper folder roll is of a diameter double that of the lower folder roll and it is connected to revolve at one-half the speed of the lower folder roll, the upper folder roll shaft 47 being shown provided in the present instance with a gear 52 which is fixed thereon and meshed with the gear 49 idle on the lower folder roll shaft 48, the gear 52 being double the diameter of thevgear 49. The opposite ends of the upper and lower folder roll shafts 47 and 48 are connected by a pair of gears53 and 54 which are fixed on these shafts, the gear 53being double the diameter of the gear 54. The gears 53 and 54 thus maintain the proper relationship between the'upper and lower folder rolls, and by reason of the idle mounting of the gear 49 on the loner folder roll shaft, longitudinal adjustment of the frame 30 carrying the folding and printing mechanisms may be accomplished without disturbing the relationship' between the upper and lower folder rolls.

The lower folder roll 46, as shown in Figures 7, 10 and .11, is provided with a creaser blade 55 and with an adj acently located pastebar 56, the paste bar being of a length which conforms with the width of the bags to be made, and it is fitted at its ends in slots 57, formed in clamps 59, the latter being mounted on the shaft 48 at opposite ends of the lower folder roll and clamped in fixed position thereon by tightening of clamping screws with which they are provided. The ends of the paste bar may be secured in the clamps 59 by screws 61. The body portions of the blade 55 and bar 56 lie in a slot or recess 62 which extends longitudinally across the face of the lower folder roll, the blade 55 being secured against one wall thereof as by the screws 58, and this slot or recess is preferably of suflicient circumferential width to permit adjustment of the distance between the bar 56 and the" blade 55 to compensate for end folds of dif ferent lengths by rotation of'the clamps 59 on the roll shaft. The edges of the blade 55 and bar 56 project beyond the circumference of the lower folder roll, the paste bar 56 projecting for a distance greater than that of the creaser blade 55.

The upper folder roll 45 is provided with means to cooperate with the creaser blade 55 whereby a crease will be formed across the forward end of each advancing bag section and such bag section will be nipped at the crease to form the bottom fold of the bag and to hold the bag section to the upper folder roll during its travel therewith. Preferably, and as shown, the upper folder roll is provided at diametrically opposite points in its circumference with bars 63 which are inserted flush with the circumferential surface of the roll and each barforms a nipping edge 64. A shaft 65 is rotatably mounted in each bar 63 and carries a nipper blade 66 which is movable toward and from the nipping edge 64 incident to rotation of the respective shaft 65. Each of the shafts 65 is provided with a spring 67 which acts to yieldingly rotate the shaft in a direction to move the nipp-er blade 66 toward the relatively stationary nipping edge 64 and to hold the doubled edge of a bag section nipped between them, and means is provided for rotating each shaft 65 to bolted or otherwise secured to the adjacent side of the frame 30. The track 72 of this cam on which the rollers 69 are adapted to travel is substantially concentric with the axis about which the upper folder roll 45 revolves and. its length determines the periods during which the nipper blades are in nipping and released positions. rhe

approaches a position in alinement with the I centers of the upper and lower folder rolls, the nipping edge 64 will lie at one side of the creaser blade while the nipper blade 66 will lie at the opposite side of the creaser blade, the nipper blade at this time being held in its open or retracted position by the roller 69 which is connected thereto and still rests upon the cam 70. By spacing apart the creaser blade 55 and the paste bar 56, as shown in Fig. 7, a space is provided between these parts in which the nipper blade 66 may be accommodated. As the nipping means on the upper folder roll and the creaser blade on the lower folder roll approach this position the leading end of a bag section, indicated at a, which has been advanced to the folding mechanism, willlie between the folder rolls, and as the latter revolve in the direction of the arrows in Figure the portion of the bag section adjacent to but in rear of its leading edge, will be pushed by the exposed edge of the creaser blade 55 into the gap provided between the nipper edge 64; and the retracted nipper *lade 66. A portion of the periphery of the lower folder roll 46 in advance of the creaser blade is preferably recessed or cutaway, as at 73, to avoid gripping of the portion of the bag section in advance of the creaser blade 55 between the closely adjacent surfaces of the upper and lower folder rolls, so that the portion of the bag section adjacent to the creaser blade is free to be forced into the gap or recess formed between the nipper blade 66 and the nipping edge 64. Immediately after the folder rolls have revolved suliiciently to carry the creaser blade 55 beyond a position in alinement with the centers of the folder rolls, the roller (3-9 connected to the nipper blade 66 passes of? the end of the cam 70 and the spring 6? connected to the shaft 65 which carries the nipper blade acts immediately to close the nipp-er blade 66 against the nipping edge G l as the edge of the creaser blade 55, which is preferably pointed, or relatively sharp, is withdrawing from a position between the nipper blade 66 and the nipping edge 64, inconsequence of which the portion of the bag section which was forced into this space by the creaser blade will be nipped along its creased edge and will be firmly held between the nipper blade 66 and the nipping edge of the upper folder roll. In order to facilitate accurate timing of the movements of the nipper blade 66 to and from nipping position, the cam 70 which controls tl e movements of the nipper blade may comprise relatively adjustable cam sections 70 which, as shown in Figures 12 and 13, are adjustable in a direction circumferentially of the cam and thus enable'the ends of the onto and from which the rollers pass to be accurately located.

(3Q \Jd Means is provided for applying. a line of paste or adhesive to the portion of the bag section adjacent to the creased and nipped portion thereof. As shown in the present meta-nee, the paste is applied to the bag section in rear of the portion thereof which is creased and nipped, by the paste bar 56 which is located on the lower folder roll in rear of the creaser blade During rota-- tion of the lower folder roll the edge of the paste bar which projects outwardly beyond the creaser blade comes into contact with a paste covered roll 74 which is mounted to revolve in the upper portion of a paste boX 7 5 so that its periphery will be touched by the edge of the paste bar 56 as the latter revolves past it, the paste thus transferred to the outer edge of the paste bar'being applied to the bag section adjacent to but in rear of the creased and nipped portion thereof. The periphery of the upper folder roll 45 is provided with a recess '76 in rear of each nipper blade 66 therein into which the portion of the 'bagsectionengaged by the paste bar may be pressed more or less, the inherent resilience of the paper" composing the bag section insuring sufficient yielding pressure between the bag section and the paste bar to effect the application of a suflicient amount of paste thereto. The paste roll 7% may be kept supplied with paste by providing a cooperating paste roll 77 which is submerged or immersed to a sufficient depth in a body of paste contained in the paste box 7 5, the paste rolls 7% and 77 being arranged to maintain contact with one another and being rotatedduring the operation of the machine, so that they have a substantially rolling engagement by gears 78 and 79 which are fixed to the shafts 80 and 81 of these rollers. A. driving gear 82 fixed on a shaft meshes with the gear 79 and serves to drive the paste rolls 7% and 7 7 continuously, the shaft 83 being connected by bevel gears 8d and to a shaft 86 and the latter being connected, in turn, by a Worm wheel 67 and a cooperating worm 88 to the lower folder roller shaft 4.6 to which the worm is fixed.

Means is preferably provided for forward-- ing the severed bag sections from'the former to the upper and lower folder rolls. As shown in the present instance, sucliforwarding means comprises a pair of forwarding rolls 89 and 90 which are mounted at the side of the folder rolls which is toward the delivery end of the former, the lower for transverse member 93 which is attached to 'or forms part of the lower portion 31 of the adjustable supplemental frame. The upper forwarding roll 89 has its shaft mounted in bearings 94, which are slidable in guides 95 formed in the upper portions of the brackets 92, so that the upper forwarding roll may move into and out of cooperative relation with the lower forwarding roll. A compression spring 96 bears on each of the bearings 94 and acts to yieldingly hold the upper forwarding roll in bag-ad vancing relation with the lower forwarding roll. The forwarding rolls are connected to revolve in unison and in directions to advance a bag section to the folder rolls'by gears 97 and 98 which are fixed on the shafts of these rolls, and the forwarding rolls are driven continuously by a gear 99 which meshes with the gear 98 on the lower forwarding roll and with the gear which is fixed on the shaft 48 of the lower folder roll 46.

While the forwarding rolls are thus driven continuously during the operation of I the machine and at a speed that will advance the bag sections to the folder rolls to conform substantially with the speed with which the bag sections are passed between these folder rolls, means is preferably employed for interrupting the advance of each bag section by the forwarding rolls after such bag section has been nipped by the folder rolls. For this purpose, a cam'100 is provided on the shaft 48 of the lower folder roll, the raised portion 101 of this cam being arran ed to operate upon a roller 102 which iscarried by an arm 103, the latter being fixed to a shaft 104 which is mounted to rock in the brackets 92. The driving gear 99 for the forwarding rolls may be loosely mounted on this shaft 104 as a supporting journal. The shaft 104 has a pair of arms 105 fixed thereon and these arms are arranged to bear against pins 106which are guided to move longitudinally in the respective brackets 92 and to bear at their upper ends against the bearings 94 for the opposite ends of the upper forwarding roll.

' While the roller 102 is riding on the low part of the cam 100 with which it is held in contact by the springs 96 which act through the pins 106, rock shaft 104, arms 105, and arm 103, the upper forwarding roller will be pressed toward the lower forwarding rolland the forwarding rolls will when the creaser blade and paste bar on' the lower folder roll and the nipping means 011 the up'per folder roll approach the position shown in Figure 7, the high part 101. of the cam will have reached the roller 102-,

ant. as the operation of the machine con 7 tinues, the roller 102 will be forced outwardly or away from the lower folder roll shaft 48, and in so doing, the pins 106 are actuated to lift the bearings 94 and thereby separate the upper forwarding roll from the lower forwarding roll to an extentsufficient to cause these forwarding roll; to release their grip upon the interposed bag section. Asthe foremost end of the bag section at this time is grippedbetween the folder rolls, tlie latter are enabled to act properl upon the bag section to Grease and nip it and to effect the further advance of the bag tion without interference from the forwardingrolls.

sec-

' The cam 101, which controls the advance,

and release of the section by the forwarding rolls is preferably split or formed of two d1sklil e sections which are relatively adjustable in a circumferential direction in order to vary theflength and the pos1tions of the ends of the raised portion .101 thereof depthof the bottom folds on all bagsmade according to such adjustment."

The nipping of the leading end of the bag section by the nipper blade 66 of the upper folder roll causes the forward edge a of the bag section to project outwardly from 1 this folder roll, and as this folder roll rotates 1n the d1rect1on indicated by the arrow in Figure 7, the nipped bag section will be advanced while lying against the periphery of this roll until it reaches an impression roll 107 which is mounted above the upper folder roll 45 in suitable bearings provided in the sides of the adjustable'frame 30. Means is provided for folding this outwardly projecting edge of the bag .section down against the portion of the bag section in rear of the crease therein and to which paste was previously supplied by the paste bar 56. As shown, such means comprises an idler roller 108 composed preferably of rubber or other relatively yielding material, the ends of the shaft 109 of this roller being revolubly mounted in bearings 110 formed in the upper ends of a pair of arms 111.

lVfeans'v is provided for yieldingly holding V the roller 108 in contact with the peripheral surface of the folder roll 45 or with abag section thereon, and preferably, the opposite ends of this roller 108 are capable of relatively independent movement toward or from the folder roll 15, whereby the idler roll may equalize its pressure on the bag section and accommodate itself to irregularities of the surface engaged by it. the present instance, the arms 111 are loosely mounted on a shaft 112, each'end of which may be fixed to a bracket 118 which is bolted or otherwise secured to a side of the frame 30, the arms 111 being capable of independent rotation on the shaft, and a spring 114 is provided for each of these arms, one end of the spring engaging the respective arm, and the other end of the spring engaging a collar 115 which is fixed on the shaft 112. The springs 11 1 act to yieldingly compress and hold the roller 108 against the surface of the folder roll 45 or a bag section thereon and as the outstanding edge a at the lead ing edge of the bag section encounters the roller 108, it will be folded back and against the pasted portion of the bag section, thus effecting the pasting of the bottom fold of the bag. In order to prevent dropping of the roller 108 into the longitudinal recess which is formed in the periphery of the folder roll adjacent to the nipper blade 66 and thus avoid damage to the roll 108 or interference with the proper performance of the folding and pasting operation by this roller, means is provided for limiting the extent of inward movement of the roller 108 without, however, interfering with its movements while operating upon the section. For this purpose, the roller 108 is made of such length that its ends will ride on the circular end plates 15 of the upper folder roll which have a diameter equal to that of the latter roll. A stop arm 116 may be provided for each of the roller-carrying arms 111, these stop arms being clamped or otherwise adjustably fixed on the shaft 112 alongside of the respective roller carrying arm, and each stop arm has a pin 117 fixed therein and arranged to operate in a segmental slot 118 in the respective roller-carrying arm 111, the slot 118 being concentric with the shaft 112. The stop arms 116 are so set on the shaft 112 that when the idler 118 on the'arms 111 against the stop pins 117. These seats 118 and pins 117 however will not interfere with the yielding movements of the roller 108 in a direction away from the upper folder roll and they will permit the arms 111 to be drawn back from the As shown in upper folder roll to a sufficient extent to facilitate removal or replacement of the roller 108.

The impression roll 107, which is mounted on a shaft 119, the ends of which are journaled in bearings in the sides of the supplemental frame 30, is preferably of the same diameter as the upper folder roll #15 and it is driven at the same peripheral speed therewith and in a direction to advance the bag sections between it and the upper folder roll. In the present instance,the shafts 4E? and 119 of the upper folder roll and the impression roll are connected by gears 120 and 121 which are of equal size and form a direct connection between them. The impression roll which is shown particularly in Figures 7 and 2023, inclusive, is faced with suitable packings or make ready 122 which insure effective impressions upon the bag sections roll, a pair of these packings are provided at diametrically opposite sides of the impression roller. Each packing, which may be composed of a strip or sheet of flexible yielding material, such as that commonly used in the'printing art, is secured at one end to the impression roll by doubling such end about an edge 125 formed in the circumference of the impression roll and arranging its terminal edge to be engaged by impaling pins 126 which are fixed in the periphery of the impression roll and have pointed ends projecting inwardly therefrom. This end of the packing is retained in engagement with the impaling pins by a clampingplate 127 which is fixed to and extends longitudinally of a shaft 128, the latter being mounted rotatably in heads 129 forming the ends of the impression roll, and this shaft is provided with means for rotating it whereby the clamping plate 127 may be brought into ;ripping relation with the impaled'ed' 'e of the packing or it may be swung clear of such ed of the packing to permit insertion or removal thereof incident to renewal. As shown, an end of each shaft 128 is provided with a crank 129 which is fixed thereto and carries a nut' 130 and a screw 181 is engaged inthe nut and extends through a lug 132 secured to the adjacent head of the roll, the screw having thrust collars 133 which prevent axial movement of the screw although permitting rotation In the present instance,

thereof in the lug. An angular end 13 1 is formed on the screw to receive a wrench whereby the screw may be rotated. Rota-

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