US787648A - Paper-bag machine. - Google Patents

Description

PATENTED APR. 1s, 1905.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLICATION FILED APR.13,1904.

5 $HEETS-SEEBT 1.

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F. E.' SIRASBlTRGr.

PAPER BAG MACHINE.

@PPLIGATION FILED APR.1a.19o4.

5 SHEETS-SHEET 2.

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lPAfALNTBD APR. 18, 1905.

- RRSTRASBURG. PAPER BAG MACHINE.

APPLICATION FILED APR. 13,1904.

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F. E. STRASBURG.

PAPER BAG MACHINE. APPLICATION FILED APB.. 13, 1904.

5 SHEETS-SHBET 4 No. 787,648. PATENTED APR. 18, 1905.

vF. E. STRASBURG. l

PAPER BAG MACHINE.

5 SHEETS-SHIEET 6.

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PATENT OFFICE.

FREDERICK E. STRASBURG, OF RUMFORD fFAL'LS, MAINE, ASSIGNOR TO CONTINENTAL PAPER BAG COMPANY, A CORPORATION OF MAINE.

PAPER-BAG MACHINE SPECIFICATION forming part of Letters Patent No. 787,648, dated April 18, 1905.

Application led April 13, 1904. Serial No. 202,987.

T0 @ZZ whom, it muy concern.-

Beit known that I, FREDERICK E. STRAS- BURG, a citizen of the United States, residing at Rumford Falls, in the county of Oxford and .ing square-bottom paper bags from tuckedpaper tubing.

My improvement relates particularly to those parts of such a paper-bag machine as are provided to fold one end of a section of tucked-paper tubing into the diamond form.

In the drawings accompanying' this specification, Figure 1 is aside elevation, partly in section, of so much of a paper-bag machine of the class specified as will illustrate the general features of my improvement. Fig. 2 is a side elevation, also partly in section, illustrating, on an enlarged scale, one form of the creasing means and the severing means of my improvements. Fig. 3 is a plan view of the creasing-rolls shown in Fig. 2 looking in the direction of arrow Z in said figure. Fig. 4is a sectional View on line c c of Fig. 3, illustrating the operation of the creasing mechanism. Figs. 5 to 14, inclusive, are a series of front and end elevations, respectively, some of which are partially in section, illustrating' successive positions of the diamond-folding mechanism. Fig. 15 is a plan View of the tube-severing mechanism.

Similar characters of reference designate like parts throughout the several figures of the drawings The paper bag machine in which' I have chosen in the presentvinstance to embody one form of my improvement, and which may be its preferredform, may comprise side frames, as 3, inwliicfhh may be supported the various parts ofthihpaper-bag machine embodying my improvements, f Power `may be communicated from some suitable source of power Ato shaft 5 ,andthroughgear 6, fast thereon', to

' the various parts of the machine.

From gear 6, through the train of gears 7 to 12, inclusive, power is conveyed to gear 13, fast to shaft 15, to which shaft is also fixed lower creasing-roll17 Fromgear 10 power is communicated to gears 19 20, fast on the shafts of feedrolls 21 22, respectively. Said gearing is so proportioned and arranged as to drive rolls 17 18 and 21 22 at equal peripheral speed and in the directions indicated by their relative arrows, respectively. Furthermore, said pairs of rolls are so timed that their peripheral speed is the same as that of the face of folding-bed 52 on carriage 2. Above shaft 5 and mounted for rotation in side frames 3 is shaft 4. On said shaft 4 is fixed gear 23, meshing with and driven by gear 6. Said gear 6 isin the present instance, 65 for convenience, illustrated as three times the diameter of gear 23. Also carriage 2, fixed, to the same shaft 5 as gear 6, is provided with three folding-beds, as 52. Gear 23 and shaft 4 are arranged and adapted to make one rev- 7o olution during one cycle ofthe diamond-.folding mechanism and carriage 2 and gear 6 to make one revolution for every three cycles of thediamon-d-folding mechanism. From gear 24 onl shaft 4, through gears 25 26,'is 75 driven gear 27 on sleeve 29, to which sleeve is affixed side nipper-cam 30. Gears 24 27 being of the same diameter, cam 30 revolves once for every revolution of gears 23 24.

Rolls 21 22 are provided to feed the tucked- 8o paper tubing from the forming mechanism (not shown) and deliver it to the severing mechanism, in this instance illustrated as comprising a serrated knife 31,A float 32, and striker 33. in T-head 101 of vertical rock-shaft 102, which rock-shaft is mounted for oscillation in bracket 103, projecting outwardly from lefthand frame 3. On the lower end of said rockshaft is fixed arm 104, on the free end of which 9o arm is revolvably mounted roll 105. On vertical shaft 106, mounted for revolution in brackets 107 108, which brackets project outwardly from left-hand side frame 3, is fixed Said striker is slidably mounted cam 109. Said cam is provided with a camgroove 109, disposed and adapted for engagement with roll 105, whereby arm 104 and from it, through rock-shaft 102, T-head 101 may be oscillated. By this means striker 33 may bev caused to pass across the serrated edges, respectively, of knife 31 and float 32. Power may be communicated to vertical shaft 106 from shaft 10EL by the following means: Miter-gear 110 on shaft 106 meshes with mitergear 111, fixed to the outer end of tubular shaft 112. On the inner end of said shaft 112 is fixed spur-gear 113, which gear meshes with idle gear 114, mounted for free revolution on stud 115, which stud is shown as screwed into a suitably-threaded boss on frame 3. Fast to gear 114 and adapted to revolve with it is gear 116, and meshing with gear 116 and fast to shaft 10u is gear 117. Shaft 10 revolves only half as fast as it is desired to revolve shaft 106 and gears 117, 116, 114, and 113 are so proportioned as to cause tubular shaft 112, and therefore vertical shaft 106, driven therefrom by miter-gears 111 110, to run twice as fast as shaft 10a.

To cause striker 33 to slide inwardly and outwardly in T-head 101 and in time with the oscillation of said head and striker, the following means are provided: Near the upper end of shaft 106 and xed thereto is gear 118, meshing with equal gear 119, fixed to stud 120, which stud is revolubly mounted in extension 103 of bracket 103. On the upper face of gear 119 is fixed a crank-arm 121 to a post, on the outer end of which arm is pivoted one end of link 122 by means of pin 123. The other end of said link is pivoted by pin 124 to striker 33. Crank-arm 121 is so disposed on gear 119 in relation to cam-path 1098L of cam 109 as to cause, in coaction with the oscillation of T-head 101 on shaft 102, the end 33EL of the operative edge of striker 33 to traverse an approximately rectangular path, as indicated by dot-and-dash line S, Fig. 15.

Above and subsequent to the striker -are rolls 17 18, which receive the bag-tube from rolls 21 22 and after the bag-blank has been severed from the continuous tube deliver said blank to the folding means. Upper roll 18 is mounted in adjustable boxes 34, which by means of set-screws 35 may be operated to vary the relation of rolls 17 18 to each other, and thereby vary the tension on the bagblanks as they pass between said rolls.

Feed-rolls 17 18 are provided with slacking means comprising coacting vibratable slackerbars 36 37, respectively. Slacker-bar 36 is supported for vibration by arms 38 39, pivoted on shaft 40 in roll 17. Said slacker-bar is normally held against the forward wall of groove 41 in said roll by means of springs 43 44, and the stroke of said slacker-bar may 'be limited and adjusted by means of set-screw 42, threaded into the rear wall of groove 41. Slacker-bar 37 in roll 18 is mounted and adjusted similarly to bar 36 in roll 17, and the foregoing description of one will answer for both. Slackerbar 37 is provided with a creaserblade 45, extending throughoutits length, for coaction with creaser-groove 46, extending throughout the length of slacker-bar 36. Also upper roll 18 has a creaser-blade 47 extending throughout its length and parallel with the axis of the roll and with slacker-bar 37 and creaser-blade 45. Said blade is situated in advance of the normal positionv of blade 45 a peripheral distance equal to the depth of the side tuck of the bag-blank to be operated upon. Roll 17 is provided with a creaser-groove 48, extending throughout its length and situated for coaction with blade 47 in roll 18. 'The two sets of creasers 45 46 and 47 48, respectively, are so situated with reference to the slacking means that the operation of the latter can have no influence on the relative actions of said creasers, in that slacker-bars 36 37 do not act until creasers 45 46 have operated upon the bag-blank. Therefore any adjustment or variation in the amount of slacking in no way affects the relative positions of the two creasers, or creasers-45 46 would be equally eflicient if arranged in their respective rolls subsequent to slacker-bars 36 37 instead of in advance thereof, and thereby be arranged and adapted to crease the bag-blank after it is severed from the continuous tube instead of previous to such severing, as shown in Fig. 4. Feed-rolls 17 18 have their peripheries cut away in the usual manner to prevent their crushing the folds of the tucked-paper tube; but for a short distance on each side of creaserblade 47 and groove 48, Fig. 4, the surface of the rolls is continuously of maximum diameter throughout the length thereof, so that the bag-blank may be creased uniformly throughout its width. The faces 50 51 of slacker-bars 36 37, respectively, are adapted for coaction throughouttheir length, and creasers 45 46 are thereby adapted to form a uniform crease throughout the width of the bag-blank.

The means provided for opening out the IOO IIO

forward end of the bag-blank and folding it down into the diamond form is as follows: On carriage 2, mounted for continuous revolution on shaft 5, may be mounted one or more folding-beds, (in the present instance three are shown,) as 52, each having the usual front clip 53 and bevel-edged side clips 54. Front clip 53 is pivotally mounted in the carriage at 55 and is provided with an inwardlyextending arm 56. Said arm may be provided with a cam-roll, as 57, for engagement with cam 58. The front clips, respectively, of the other folding-beds are arranged, mounted, and actuated similarly to clip 53. Side mounted arms 91 on opposite sides of foldingbed 52. Said arms 91 extend downwardly beyond their pivotal points and are provided with rolls, as 92, for engagement with actuating-cams, (not showin) but whiclrcams and their operation are well known in the art and may be found illustrated and described, for instance, inUnited States Patent to Claussen and Mortson, No. 635,090, dated October 17, l0 1899. Mounted for oscillation on fixed trunnions 59 above and adjacent to carrier 2 is a gripper-carrier, (indicated in a general way by 60.) Said gripper-carrier comprises a frame 61 of any suitable shape', in the present instance illustrated as of yoke shape, for carrying the several parts of the mechanism. On the inner ends, respectively, of shafts 62 63, which shafts are disposed opposite to each other and at substantially forty-five degrees to the axis of oscillation of carrier 60, are side clips 6465, respectively. On the outer ends of said shafts are segment-gears 66 67, respectively, meshing with other segment- -gears 68 69, respectively. Segment-gears 68 69 are fast to shaft 70, which shaft is mounted in bearings in gripper-carrier 60. On the left-hand end of shaft' 70, Fig. 5, is fixed arm 71, on the outer end of which is mounted cam-roll 72 for coaction with cam 30. Said cam comprises two relatively adjustable disk-like parts or members, as 301 and 302, the former having a hub 303, which may be clamped to sleeve 29 of gear 27 and adjusted thereon by means of clamp-screw 304. Said slots, as 305, through which clamp-screws 306 pass for engagement with cam part 302 for clamping the same to cam part 301. Cam part 302 may thereby be adjusted relative to cam part 301. Said cam 30 is coaxial with trunnion-shaft 59 of gripper-carrier 60 and -may be caused to revolve at a uniform speed in a clockwise direction, Fig. 6, by means already herein described. Roll 72 is constantly urged toward the periphery of cam 30 by means of spring 73, one endv of which spring bears upon .the face of frame 61 and the other end is held in collar 74, adjustably secured to shaft 70 by means of set-screw 76.

Fast to yoke-frame 61 and projecting inwardly therefrom are spring-fingers 78 79, which fingers are so positioned laterally with respect to the path of the bag-blank as to enable them to coact with side clips 64 65, respectively, to grip the upper plies of the side tucks of the bag-blank, respectivelyin the operation of forming the bag-bottom. Yokeframe 61 is provided with a front finger 77 for entering the mouth of the bag-blank to assist in turning back the upper ply thereof. Oscillatory motion may be imparted to gripper-carrier 60 by the following means: Suitably mounted for oscillation at 81 in the cam part 301 is provided with one or moreupper part of one of frames 3 is an arm 82,l having at its lower end a toothed segment 84, arranged and adapted to mesh with gear on gripper-carrier trunnion-shaft 59. On arm 82, intermediate toothed segment 84 thereof,

and pivot-shaft 81 is mounted roll 83 for engagement with cam-slot a of cam 80, whereby upon the revolution of cam 80 said gripper-carrier may be oscillated through a predetermined stroke.,

The operation of my improved machine is as-follows: Suitable tucked-paper tubing having slits 86 at proper intervals therein having been fed into proper position under serrated knife 31 and around float 32 between feed-rolls 21 22, power is applied and the machine set in motion. By means of rolls 21 22 the tube is fed upwardly into engagement with rolls 17 18, revolving at the same surface speed as rolls 21 22, and said tube is held taut between the two pairs of rolls, respectively. Continuing the upward movement of the bag-tube between rolls 17 18, said tube presently engages with creaser 47 48, blade 47 in roll 18 forcing said tube into groove48 in roll 17, thereby forming a crease 87 entirely across the bag-tube and at right angles to the length thereof. Said tube still continuing its upward movement presently passes into engagement with slacker-bars 36 37. Said slackerbars being provided with creasers 45 46, a second crease 88 is formed acrossl the blank similar to crease 87 and at a predetermined distance therefrom equal to the depth of either of the side tucks. During this time striker 33 has moved forward in the direction indicated by arrow e, Fig. 15, into contact with ICO the bag-tube and continuing its movement across the path-thereof pushes said tube over the edges of knife 31 and fioat 32. This backward pulling on the advanced portion of the bag-tube causes the slacker-bars 36 37, between which said tube is gripped, to swing backwardly on their trunnions until they contact with their respective stop-screws, when the bag-blank is severed from the continuous tube and the slacker-bars, by means of springs provided therefor, are returned to their normal positions, respectively, carrying the bagblank with them and restoring said blank to its previous and normal position in relation to the machine. Duringthe operation of the slacker-bars rolls 17 18"have continued their uniform rotary movement and immediately regripthe severed and creased bag-blank 90 between their coacting peripheries, respectively, and feed said blank onward and upward onto folding-bed 52 of cylinder 2. As the mouth of the bag-blank stands normally more or less open, entrance is provided therein for finger 77 of the gripper-carrier and front clip 53 of the folding-bed. Said front clip thereupon grips the forward end of the lower ply of the IIO bag-blank to the folding-bed, Figs. 5 and 6.

Side clips 54 on said folding-bed 52 now swing inwardly on their trunnions and enter the side tucks, respectively, of the blank and clamp the lower plies thereofdown to the face of the folding-bed. During the feeding of the bag-blank onto the revoluble folding-bed the revolution of cam 30 has presented rise 30a to roll 72, and thereby oscillated arm 71 and, through shaft 70, segment-gears 68 69 and 66 67, shafts 62 63, and side clips 64 65, respectively, until when the bag-blank is gripped to the folding-bed by front clip 53 said side clips have entered the side tucks, respectively, of the bag-blank and are ready to grip the upper plies thereof to spring-fingers 78 79, respectively. (See Figs. 5 and 6.) Folding-bed 52 continues its rotation on carrier 2 about axis 5, and the bagblank is led well up onto front hook 77 of gripper-carrier 60. Said gripper-carrier, by means of cam 80, roll 83, arm 82, segment 84 thereon, and gear 27, now commences to rotate in an anti-clockwise direction, and cam 30 continues its rotation in a clockwise direction. This very soon brings roll 72 onto the high part 301 of cam 30, Figs. 7 and 8, causing side clips 64 65 to grip the upper plies of the side tucks, respectively, to spring-fingers 78 79. The bag-blank is now fully in the grasp of the several clips, and folding-bed 52 continuing its onward movement about axis 5 and grippercarrier continuing its anti-clockwise turning about trunnion-shaft 7 O the mouth of the bag-blank is opened out and folded down into the diamond form, the lateral edges 93 94 of the bag-bottom being readily folded along the lines defined by creaser 47 48, as hereinbefore described. Also the creasesformed at the same time and by the same means in the other plies of the blank now coincide with creases 97 98, made by the original folding of the tucks in the tubing, and thus facilitate the ease and accuracy in the later folding of the end flaps of the bag-bottom. When gripper-carrier 60 has traveled nearly to the end of its rearward stroke in an anti-clockwise direction,roll 72 ou-arm 71 is met by the low part 30C of cam 30, traveling in a clockwise direction, and descends onto said low part, thereby causing side clips 78 79 to open and liberate the diamond-folded bag-blank, Figs. 9 and 10. Gripper-carrier 60 continues its rearward stroke and folding-bed 52 its forward movement, and front clip 53 releases front flap 950ic the bagblank, which is therefore allowed to spring up from folding-bed 52, ready to be folded over onto the bag-bottom, Figs. 11 and 12. Side clips 54 hold the bag-blank to foldingbed 52 until rear fiap 96 of the bag-blank is withdrawn from front hook 77 and the par-- tially-completed bag delivered to some suitable mechanism (not shown) for folding and pasting the end liaps. Gripper-carrier 60 re- 65 on gripper-carrier 60. However, said gripper-carrier still continuing its return movement at a speed in excess of the speed of cam 30 said roll 72 runs down from rise 30a and onto low part 30C of said cam, thereby causing side clips 64 65 to again open. The gripper-carrier has now reached its forward position and is ready for the receipt of another bag-blank, Figs. 13 and 14.

rllhe partial closing and reopening of side clips 64 65 during the return movement of the gripper-carrier is not necessary to the fuuctional operation of the machine, but is in no way detrimental thereto. and reopening of said clips is the result of the unusual length of cam time provided for the operative closing of said side clips, which lengthA of time is of great value, contributing in a marked degree to accuracy in forming the diamond and to the speed at which the machine may be successfully operated.

I claim- 1. The combination of a pair of rolls 17, 18, a creaser-blade 47 in one of the rolls, and a creaser-groove 48 in the other roll, a slackerbar in each of said rolls, means for supporting'y each slacker-bar to yield in the line of its travel, a creaser-blade 45 in one of the slackerbars, and a creaser-groove 46 in the other slacker-bar; all combined and operating t0- gether substantially as described.

2. The combination of a pair of rolls 17, 18,--

a creaser-blade 47 in one of the rolls, and a creaser-groove 48 in the other roll, a slacker- Said partial closingY IOO bar in each of said rolls, means for supporting each slacker-bar to yield in the line of its travel, means to adjust thestrokes respectively of the slacker-bars, a creaser-blade 45 in one of the slacker-bars, and a creaser-groove 46 in IIO the other slacker-bar; all combined and operating together substantially as described.

3. The combination of a pair of rolls 17, 18, a creaser-blade 47 in one of the rolls, and a creaser-groove 48 in the other roll, slackerbars 36, 37 in said rolls, respectively, means for pivotally supporting each slacker-bar rto yield in the direction of its travel, a creaserblade 45 in one of the slacker-bars, and a creaser-groove 46 in the other slacker-bar; all combined and operating together substantially as described.

4. In a paper-bag machine, the combination of a pair of rolls 17 18, a creaser-blade 47 in I0 64, 65,*and means to close said side clips from said cam; all combined and operating together substantially as described.

In testimony whereof I have signed my name to this speeitioation, in the presence of two subseribing Witnesses, this 11th. day of April, I5

FREDERICK E. STRASBURG. Witnesses:

THEO. HAWLEY, HAROLD SMITHWICK.

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