US2605740A - Machine for applying adhesive to paper and the like - Google Patents

Description

5, 1952 E. F. TAYLOR ET AL 2,605,740

MACHINE FOR APPLYING ADHESIVE TO PAPER AND THE LIKE Filed Dec. 22, 1948 I5 Sheets-Sheet 1 flLBERT HENRY Mum/v: EDGAR FORWARD THILOR Inventors Attorney 5, 1952 E. F. TAYLOR ET AL 2,6b5,740

MACHINE FOR APPLYINGADHESIVE TO PAPER AND THE LIKE Filed Dec. 22, 1948- a Sheets-Sheet? ALBERT HEN 8) WILL/6W5 EDG/IR FORM/9RD 7/7 m OR Inventors Attorney 3 Sheet's-Sheeifi E. F. TAYLOR ET AL Aug. 5, 1952 MACHINE-FOR APPLYING ADHESIVE TO PAPER AND THE LIKE Filed Dec. 22, 1948 'F/GG.

Amt-Rf HENRY Mum/vs 50cm Fan w/ma 74m ore Inventors .By I

Aitorr rey Patented Aug. 5, 1952 g 2,605,740 7 MACHINE Foa APPLYING ADHESIVE T ATENT OFFICE PAPER AND THE LIKE l Edgar Forward Taylor, Nottingham, and Albert I HenryWilliams, Bunny, England Application December 22, 1948, Serial No. 66,762

- In Great Britain November 29, 1947 This invention relates to, machines for applyin adhesive to paper and the like and has for its object to provide improvements in such machines.

Glaims (01. 118 -236) With this object in view the invention provides a machine for applying adhesive to paper and the like comprising a support for a stack of sheets of paper or the like, a paper gripping device, means for adjusting the support towards and away, from thegripping device,.means for moving, saidgiippin'g. device to feed a sheet of paper to a roller coated with adhesive and means for peeling-01f the pa'perirom the roller' and for guiding the paper onto a travelling belt or thelike. g

Means are provided. for; transmitting i the f desired motions to thefva riousf parts. The machine may be s'tartedautomatically under control of another .machine performing an operation othenthan 'applying adhesive to paper,' or itmay be started by hand. Meansare also is provided at the lower end of this framework. The shaft 2 is normally itdle but it has freely mounted on it ajgear wheel Swhich is' arranged to be continuously rotated through suitable gearing}! from a convenient source of power such as motor 5. Atpredetermined intervals this gear 3 is locked to its shaft .2 by a clutch device consisting offa disc cam 6 fixed to the shaft 2.

preferablyjprovided functioning; when action is taken to stop the machine, tov stop :the machine automatically at theend of a cycle 'of operations.

Means are also preferably provided for adjusting. the distance of the. table from the paper gripping device automatically according to the varying I depth of the stack of papers. Means are also provided for applying. adhesive to the roller and means for adjusting the thickness or depthof the adhesive coat applied to the roller. Still further means are provided for renderingthe pneumatic gripping device operative and inoperativerequired times automatically.

The above and other features of the invention are set forth in the appended claims and are 'disclosediin the detailed description given by wayjof example, 'of the particular embodiment illustrated in; the accompanying drawings in which:@. j N I r Fig. 1 is a front elevationof a machine according to the invention; 1

Fig. 2.15 a sectional side elevation of :the machine, looking at the left of Fig. 1.

Fig.3 is a detailed side View, on a larger scale, of the means for advancing the support for the stack of sheetsof paper;

Fig. 4 is a part sectional elevation of a roller and clutch device therefor, for rotating the adhesive roller; J

I Fig. 5. is an endview of .a suction member for lifting the topmost sheet of the stack; and

Fig. 6 is an underneath plan of the same.

Referringnow' to Figures 1" and 2 a suitable fixed framework I is provided for carrying the various parts and av horizontal main, shaft/2 at the short distance away from the gear Wheel and a clutch member l mounted on the shaft and slidable axially on a keyway between said cam fiand gear 3 and biassed by spring 8 into engagement with a complementary clutch member 9 associatedwith the gear 3. A bell crank lever device is also-provided, one (upright) arm Iii of which is forked'to engage thejslidable clutch member l and is fixed to a spindle II and the other (horizontal) arm [2 of which is also fixed "to spindle l] and is arranged. to be depressed bythe cam 13 into a' clutch rleasepo sition to disengage the clutch. :The cam does not engage the bell-crankarm l2 directly but it engages a truck [l3 which' is fixed to a sleeve 14 and this sleeve It is axially slidable on a rod 15 having bearings i'n the horizontal arm [2 of the bell crank lever; the truck I3 is biassed by spring it and said lever I8 maybe actuated from a remote position by means of a' rod [9, cable or other suitable connection. e I

In operation the clutch'is normally disengaged bythe highest part of the earn 6 engaging the truck I3 to holdthe horizontal arm I2 of the bell crank lever down. and the upright arm it in its-farthest position away from. the gear 3; hence the slidable clutch member is held out of engagementwith the'gearclutch member 9. If new the: trip lever'lfi is tripped (e. g. under the controlo'f another machine) the sleeve I l carrying thetruchw is moved axially by the triplever 18 so as tomovethe' truck l3 laterally out of the path-of the cam 6, whereupon the bell crank is permitted to rock and the slidable clutch memberl engages the gear clutch memher 9 under the influence of the spring 8 biassing the slidable clutch member 1 towards the gear 3; the main shaft 2 now rotates. To stop the machine the trip lever 18 is returned to normal withthe result that the truck I3 is again located in the path of the cam 6 and it will therefore be appreciated that when the shaft 2 has comations consists in energising a paper grippingdevice, picking up a sheet of paper from-a supply, feeding the paper to a roller having a coating of gum, de-energising the paper gripping 4 vided a hand wheel 42 (Figure 1) fixed to the end of the shaft 39 (having a lever control for the said stop pawl 4|, if desired) in such manner that by turning the wheel (after first pressing the lever, if provided, to release the stop pawl), theshaft 39may be rotated at will. For rotating the shaft 39 automatically a clawker 43 (Figure 3) is provided engaging the ratchet wheel 46 and this clawker 43 is controlled, through suitable links and levers 44 by a cam 45 on the main cam shaft 2.

It will be appreciated that the extent of upa ward movement of the platform 34 that would device and presenting a new sheet of paper from the supply to the gripping device.

The gripping device indicated at (Figures with spaced branch tubes 22 open at one end.

to the longitudinal duct in the main tube and at the other end to divergent shallowgrooves 23 in the lower face of a rectangular gripping plate member 24. A relief valve (Figures 1 and 2) is also provided in the suction pipeline 80 of the pump, said valve being automatically opened and be required to feed the uppermost sheet of paper towards the gripping plate 24 after each opera- .tion would be much smaller than is normally provided for by ratchet mechanism and thereclosed through the mediumof a pivoted lever 26 v and a cam 21 (hereinafter more fully referred to) on the main shaft.

The tube "2| is fixed at each end to a short upright bar or. block '28 (Figure 2) slidable vertically in one end of an upright plate .29 whichis itself slidable horizontally on fixed guides 39 (see also Figured). The tube 2| is therefore readily movable vertically and horizontally and for this purpose; the upright bar or block 23 is connected to a vertical rod 3| engaging with a cam 32 on the mainshaft 2 and the horizontally movable plate 29 .is connected to the aforesaid pivoted lever 26 which is controlled by the aforesaid cam 21 on the shaft 2.

The under surface of the gripper plate 24 is normally located in close proximity, but at a comparatively small angle to the uppermost sheet of a stack 33 of sheets of paper to which adhesive is to be applied, with the result that because suction is applied (by the pump) to the grooves in the plate, that part of the uppermost sheet of paper opposite the plate is attracted to the plate and assumes an attitude inclined to the remainder of the sheet and urged against the underside of the plate; there is also a marginal part of the paper which projects beyond the raised edge of the plate. This stack '33 of paper is supported on a platform 34 which is mounted for vertical displacement (so as to feed the papers towards the gripping plate 24) by a stout rod 35 depending from it at the rear of the machine said rod being slidably mounted in an upright sleeve 36 located toward the lower end of the machine. This stout rod 35 has rack teeth 31 formed in it which are arranged toengage a pinion 38 fixed to a suitable cross shaft 39 and this shaft 39 and pinion 38 are rotatable by hand, by automatic means, or by both. For this purpose a ratchet wheel 46 (see also Figure 3) is also fixed to the shaft 39 and this wheel has a,

stop pawl 4| associated with it; there is also proforethere is also provided and adjustable blufling plate 46 which is arranged to be interposed to varying extents between the clawker 43 and the ratchet teeth 40. For the purpose of controlling this plate 46 it is connected (through suitable links and levers 41, see also, Figure 2) to a feeler device 48 which is biassedby a spring 49 downwardly into engagement with the upper surface of the stack of papers 33. It will be appreciated that the ratchet wheel will be racked only when the blufling plate 46 uncovers a new tooth on the ratchet wheel 46. and this stage is timed to take place .at suitable intervals under control of the height of the stack of papers. Theplatform 34 is balanced by a weight |34hanging from a cord or the like 234 which is coiledaround the shaft 39. Immediately to the inner end of the platform 34 there is provided an upright wall 50 (Figure 2) which extendsupwardly to a position slightlyhigher than the gripper plate 24 and its upper edge. ma be chamfe'reddownwardly towards said gripper plate. Slightly spaced upwardly from this upperedge of the said wall 5|) there is provided a roller 5| having a coating of adhesive. Adhesive is applied to this roller 5| by its engagement with another roller 52 preferably of larger diameter and this latter roller 52 dips into a trough 53 containing adhesive (which may be heated by electric heating element I53). These rollers 5|, 52 are rotatable through suitable mechanism such as chains 53' and sprockets 54 by the main power source such as the motor 5; the lower roller 52 is adjustable (e. g. by screw means 54') towards and away from the smaller roller 5| to control the thickness of the adhesive coat applied to the latter and .the trough '53 is preferably movable upwardly and downwardly into and out of its operative position by bars 55 depending from it and engaging with cams 56 fixed to a shaft 51 which is rotatable by a hand wheel 58; the cam 56 is so shaped as to hold the trough in its fully up and down positions... 7

Immediately above the small roller 5| there is provided a paper peeling device for peeling the paper off the roller 5i and this device consists of. a plurality of spaced strip members 66 each having a tapered or curved part 6| which engage the surface of the roller in such manner as to peel the paper off the roller and guide it to a travelling band, belt or the like 62.

This belt 62 travels round end rollers 63 and is held in frictional engagement with a belt traversing roller 64 by an idler roller 65' which is biassed by adjustable spring plunger 66. The roller 64 is normally freelyrotatable on constantly driven and stub spindle 61 (Figure 4) and a clutch device isv provided by which the roller is clutched to the driven spindle once for each sespring H biassing the said faces apart and a pair r of clutch collars 12,-13 having inclined co-operating faces l4, 15. The collar'l2 is freeonthe spindle 6! and is arranged for part rotation by movement of the aforesaid lever zfithrough the intermediary of arms andlinks '16 (Figure 2). The collar 13 is fixed to the spindle 61, the result being that upon movement of the lever 26 the collar 12 is partly rotated, and because of the inclined faces 14, 15, imparts axialmovement to the clutch member 68 against the spring H so that the roller is thereupon rotated. On the return motion of the lever 26 the roller is declutched by a reversal of the aforesaid clutching movements and the relief valve is permitted to close by its spring.

If desired there may be provided an idler disc 11 (Figure 2) bearing on the belt to ensure that the paper lays fiat on the belt.

If desired also there may be provided a hole '18 in the upright wall 50 and a block 19 having a groove Bllconnecting with said hole and with a lead from the blower side of the pump. The arrangement is such that at the appropriate time air is directed through the said hole to a location just below the uppermost sheet of paper in the stack so as to minimise the possibility of more than one sheet being raised by the gripping plate 24. gripping plate 24 provides a good gripping surface for the paper and that by attracting the paper to it, so as to form a bend therein, the paper is readily picked up and carried to the adhesive coated roller without the aid of guiding means such as a fixed rod. This is an important advantage because if a fixed guide rod is employed, and faults occur, paper is likely to foul the fixed rod and become entangled between the rod and the roller whereas by dispensing with said fixed rod the possibility of entanglement ofthe paper is considerably minimised.

The operation of the machine is as follows:

First the main shaft 2 commences to rotate by actuating the clutch mechanism, as before described, so as to rotate the camsfi, 21, 32 and 45. It should be first explained that the relief valve 25 is normally closed to maintain suction at the gripping device 24, which suction is applied to the uppermost sheet of paper, therefore the uppermost paper is, at this stage, gripped by the gripping member. The first cams to function (cam 21 and 32) operate the vertically slidable bar or block 28 and the horizontally slidable plate 29 to effect a combined raising and horizontal'movement of the gripper plate 24 to move it toward the roller 5|. Continued movement in this manner causes the leading edge of the paper to engage the adhesive coated roller 5 I whereupon the paper adheres to the roller. At this stage the suction to the gripping bar is stopped by the lever 26 opening the relief valve,

and subsequent movement of the paper is effect- It will be appreciated that the 1y so as to guide the paper (with. the assistance of disc 11) Ohto thetravelling 136117 62 *inanining the belt.

During these operations the cam 45 associated with the platform raising "ratchet wheel 40 functions; to transmit one. rack to the gclawker 43 but as previously explained: the action of the clawker on the ratchet wheelis controlled by the height of the sta'ck'df papers through the intermediary of the feeler= device 48. The parts are returned to the original positions by subsequent movement of the respective cams and as also previously intimated the cycle of operations is completed by the time that the main shaft has completed one revolution. If in the meantime, the trip lever l8 has been re-set the shaft automatically stops rotating by the automatic disengagement of the clutch by cam 6. Alternatively the machine continues to operate on sheets of paper in succession until the trip lever is, in fact,re-set to permit automatic stopping of the machine at the end of a cycle of operations.

It will be appreciated that any or all of the cams and associated mechanism particularly those cams and levers which move the gripping plate may if desired be duplicated at each side of the machine.

We claim:

1. A machine for applying adhesive to paper sheets in succession, on one side thereof, comprising a frame, a driving shaft therein, a rising and sumed, a coating roller in the frame and means for driving it, a tank for adhesive and a furnishing roller for supplying adhesive from the tank to the coating roller, a sheet lifting suction device, vertical guides supporting the suction device above said support, a second cam means on said driving shaft for raising and lowering said suction device in its guides, and a further cam means on the driving shaft for moving said guides towards and away from the coating roller, a suction conduit leading to the said suction device, a relief valve included in said suction conduit, and means operated by said further cam means for opening said relief valve when the suction device is nearest the coating roller.

2. A machine according to claim 1, having a clutch means in the drive to said driving shaft, and interrupting means on the driving shaft for interrupting the operation of the driving shaft only upon the completion of a cycle of operations on a sheet.

3. A machine according to claim 1, having peelers for stripping the sheet from the coating roller and for disposing it adhesive side uppermost, and a travelling band to receive and carry away the sheet when stripped. V

4. A machine according to claim 1, wherein the suction device includes an elongated hollow gripping plate having a number of suction tubes leading thereto on its upper side, and having a corresponding number of outlets in its underside each of which has radiating grooves in the surface of the plate giving a suction effect substantially along the whole length of the plate.

5. A machine according to claim 1, wherein the driving means for the coating roller includes a constantly-driven shaft, a normally-open clutch between said shaft and roller, and means MT DQ IA ESIPAT NT 9 1 6 11mm" Pa r Name Date Tuck et a1. -1 Dec. 16, 1902 1 Erickson July 3, 1906 Smith -1 Feb. 22, 1910 Cheshire -1 July 6, 1915 Cheshire July 15,-1924 L0w June 10, 1930 Dickerson ;Nov. 10, 1931 Dearing Nov-,2, 1937 Haess1er; Feb. 6, 1945 Crowder et a1. May 17, 1949

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