US2382929A - Web pasting apparatus - Google Patents

Description

Aug. 14, 1945. R. J. WILLIAMS WEB PASTING APPARATUS Filed May 31, 1943 3 Sheets-Sheet 1 1945- R. J. WHLLIAMS 2,382,929

WEB PASTING APPARATUS Filed May' 31, 1943 3 Sheets-Sheet 2 Aug. 14, 194 5. h. J. wiLLlAMS WEB PASTING APPARATUS Filed May 31, 1943 I25 u m 's .\27 Z a 23 39 Z n 122 g x 3 Sheets-Sheet 5 Patented Aug. 14,1945

I iTEo fisT "WEB PASTING APPARATUS Russell J. Williams, Manhassett Village, Mo.. as. 1 signor to Bemis Bro. Bag Company, St. Louis, Mm, a corporation oLMissouri Application May 31, 1943, Serial No. 489,222

3 Claims. (01.91-50) This invention relates to web pasting apparatus, and with regard to certain more specific features, to apparatus of this class for applying to web materials patterns of adhesive.

Among the several objects of the invention may be noted the provision of web pasting apparatus which lays on a clean cut pattern of adhesive with any desired practical thickness of adhesive; and the provision of apparatus of this class which by means of a fairly simple construction is adaptable to produce variable. pattern lengths on the web from which variable {sized blanks may be produced for various purposes. Other objects will be in part obvious and in part pointed out hereinafter. c

The invention. accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of theapplication of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated several of various ments of the invention,

Fig. 1 is aside elevation of my new apparatus; Fig. 2 is a plan view of Fig. l; Fig. 3 is an enlarged biased section looking up from line 3-3 of Fig. l; r

Fig. 4i is an enlarged detailed view of an adhesive applying mechanism, viewed as in Fig. 1;

Fig. 5 is a vertical section taken on line 5-5 ,oi Fig. 2 but drawnon the scale of Fig. 4;

. Fig. 6 is a view similar to Fig. 5-but showing a modification;

possible embodi- Fis. 7 is a sectional detail of a. diflerential con- 3 1 metal I generally shows an adhesive applying unit, numeral 2 an adhesive drying or solidifying unit, and numeral 3 a wind up unit. These may be farther spaced than shown particularly it it is desired to use a plurality oil units to increase the number of adhered webs in the final laminated article. In thisevent more space is provided between planes A and B for bringing in more webs from more units I. Only one unit i is shown by way of example.

may be completelyrelaxed or tadiusted to The adhesive applying unit I consists oi a. frame 5 on which is a removable supporting shaft 1 for a supply roll 9 of the paper, cloth or like web H to which adhesive is to be applied. This shalt I is laterally adjustable in frame from a control mechanism II for properly positioning the supply roll 9 so that the web H is properly aligned in the machine. The mechanism It includes an adjustable tension brake II for providing'proper reaction from the roll 8 on the web I i. Further description of the device II, I! will not be given since its form and function are already known in the art.

The web I l passes from the supply will behind an idler roll I! and then up and over a lowermost one of apair of draw'rolls i8, 20'. The

,be set up between the rolls vl9 and 2D, or no pressure at 9.11. Briefly the mechanism 2| consists in screws 25 operating against sliding bearing: 21 for the upper rollill. These screws are threaded through plates 29 which are held down by springs 3| reacting against the, heads or fixed studs33. Thus when desired the bias on ro l ll practical value. 1 e I :I'he shaft supporting the lower draw roll 19 is'driven from a sprocket and chain drive 31,.

39, from a lower sprocket M (Fig. l). The lower sprocket II is on a shaft 42 which is driven through a chain drive 43 from a shaft v45. Shaft I 5 in turn is driven by means of a belt drive; 4! from a motor 49. Thus is provided means .for drawing paper from the supply 9 into the upper part of the adhesive applyingiapparatus. 1

.A teature of this adhesive applying. apparatus.

is its adhesive applying intaglio roll II which is mounted on a shaft 63 suppo t d upon a swinging frame 53. Frame 511s? pivoted on. shaft II in. frame 5. Outside oi the frame 5, the II is provided with asector arm 51 throughfwhich the swinging irame ot may be adjusted to desired answer position. a'l ckingboitin holds the assembly in any desired position. Bifiitable in h lacent part or frame nmdate adjusting movements of the end; the,

shaft 63. From the above, it is clear that. the

- shaft 0: supports the roll 5| and lsltseli supported in said swinging frame 53. j I a A gear 65 (Fig. 8) iscarried on the shaft 01 and meshes with adrive gear 0! carried on the shaft (Fly. 7). 'l'hisgear'il is driven irom a frame 53, as is roll 3|.

be seen that. the roll III picks up adhesive delivers it to roll I03 from whence it is delivered wheel 33 meshes with a. worm 35 having a rotary adjustment from a hand wheel 31. The purpose of the differential is to allow for advancin or retarding the motion phase of the surface of the intaglio roll with respect to the web II while the intaglio roll is rotating. Any given adjustment is held becausewhile the worm 33 may drive the wheel '83, the reverse is not true. Hence the roll 5| may beproperly phased by ad J'ustment from wheel 81, any given adjustment being maintained.

The sprocket 63 is driven by means of a chain 83. Chain 83 is driven from a variable speed transmission gear box 3|, and the latter is-driven from the shaft 45 by means of a separate chain drive 33. Gear boxes such as 3| are known. For example, see Link Belt Company's so-called P. I. V." gear referred to in its catalog book No. 157.4, 1939 edition. Changes in the speed ratio through the box'3l may be effected from a verniers hand control device shown at 33 (see page of said catalog for details). Thus from the device 35 may be controlled the speed of the rotation of the intaglio roll, and from the handle 31 its phase position may be changed.

The surface of the intaglio roll 3| is recessed preferably by milling as indicated at 31. The shape is according tothe pattern of adhesive deassaoao the solid-line position shown in Fig. 4,.wherein the reach of web II between the rolls I21 is pressed into an arch'or arcuate shape over-the upper-side of the intaglio roll 5|. The descent of the cradle I3I is limited by rotary and axially adjustable Jack screws I32 (Fig. 9). These are threaded through rotary pieces I36 adapted to be adJustd and clamped to the cradle 'I3I by bolts I34. Thus rotary pieces I33 may be locked remembered ,is angularly adjustable. Lock nuts I31 maintain given axial adjustments of screws I32.

A slotted extension I33 from the frame 5 acin its downward (solid line) position shown in Fig. 4, it may be held down by screwing up clamp I42 (Fig. 9) at a suitable location of screw I4I in the slot I of extension I33. I

The alternate and raised position of the cradle I3I is shown by dotted lines in Fig. 4. In this position it allows withdrawal of the web II from the surface of the intaglio roll 5|. In order to move the cradle, a handle I43 is pivoted at I45 on the cradle. when this handle is swung to the right-hand (solid-line) position shown in Fig. .4 it contacts the shaft I33. The shaft I33 then acts as a fulcrum for the lever I43 which may sired on th w b II. Th de th f eac recess 35 lift the cradle to the dotted-line cradle-position is of the orderof a! of an inch or so for pocketingshown. To hold the cradle in this position, a

the requisite amount of adhesive needed in the I pattern of adhesive which is to be applied. The

remainder of the roll surface is left as a smooth pivoted latch I41 is swung into position beneath the cradle. This latch may be cleared for allowmg the cradle to descend to its solid line position.

cylinder. A scraper blade forremoving adhesive 40 The lever I43 may be swung to the left-hand .from the surface of the roll (but not from these intaglio depressions 31) is shown at numeral 33. the same being adjustable from adjusting screws MI. The blade is supported on At numeral I03 is shown an idler adhesive roll supported on a shaft I03 which is supported in bearings fixed on the frame 3. This roll I03 is driven froma gear I03 on shaft I33. Gear I03 meshes with the pinion 31 (Fig. 8). lofialso drives a gear I01 on the shaft I03 of an adjacent adhesive pick-up 'roll III. The latter roll III is carried on a shaft I03 whichis sup- Beneath the roll 'III is located a removable pan I23 for a suitable adhesive I23 into whichthe roll III dips. The directions of rotation are shown in Figs. 4 and-5 and from these itwill ands the rollers I21 to swing further down but still maintaining the desired arcuate contact of web to the surface of the intaglio roll 3|. Such adhesive as is on the outer surface of the intaglio roll is scraped of! clean by the scraper 33, leaving only the adhesive in the intaglio depressions 31.

Inorder to transfer the adhesive from the depressions 31 to the passing web II, the latter is caused to pass under twospaced idler rolls I21 which are carried on shafts m located in operation, the cradle "I is swung down into 7 the swinging 4.

The gear 50 (dotted line) position shown in Fig. 4' where it is out of the way.

a swinging frame such as 53 is to allow for its 5 replacement in different sizes (diameters) and at-the same time for bringing it into iuxtaposI-- adhesive delivery when rocked is moved generally vertically. That is, the movements of the two are substantially at right angles so that regardless of what size of 5 intaglio roll 3| is used in theframe 33, the spaced place theweb therebetween in an arcuateposition on said intaglio roll. For example.j if -a smallerintaglio roll 3| is used than the one shown, it will be positioned more to the right (toward the roll I03) and the'cradle I3I'will cause II with the smaller intaglio r011.

In Fig. 6 is shown how,'if it is desired to dispan I43 which-is carried beneath the shaft 33.

As long as the cradle I3I is down, the web II is in conca'vely arcuate contact with the intaglio roll 5|, from whence the web II picks up adhesive from the intaglio depression 31 while being unaffected by the clean outer surface of the roll. a .The .result is the application of. adhesive patterns V to the bottom of the web II as shown in Fig. 3 5 These are cleancut, and contain an ample commodates a lock screw I4I vand clamp I42 of the cradle I3I, so that when the cradle is placed be seen that the frame 33 when rocked moved generally laterally, while the cradle I3I rollers I21 will approach the intaglio roll so as'tc Dense with the rolls I03 and I I I the intaglio 'roll L may be dipped directly into the adhesive I23 in a I V roll size increases, its center rises.

velocity of its surface is always equal to the linear 35 To prevent application of adhesive impressions from the intaglio roll to the web I I, the cre 1e I3I needs only to be lifted to its dotted line position. Pressure is at this time taken off the draw roll 21 so that web feed is at this timestopped.

The web on which are the adhesive impressions travels to the drying section 2. This consists in a supporting frame ,I5I for rotary idling drying drums I53 carried in. suitable bearings I52 and over which the web II is threaded as shown. As 16 the web II approaches the drums, it is brought into juxtaposition witha second web I2. Web

I2 is introduced-from beneath drums I53 being' guided by idler rolls I55. It comes from a supply roll I51 mounted upon a shaft'l59 also beneath.

Shaft I59 like shaft 15 is under control of an adjustment and brake mechanism I3, I5, such as the one above described.

Both webs II and I2 pass through ironing rolls I55 which squeeze out any bubbles which may be ,in the adhesive patterns.

After passing over the drums -I53 the multi-ply web II, I2 proceeds to wind up apparatus shown at 3. This apparatus consists of a frame I6l in whichare shafts I53 upon which are supporting rolls I55. The supporting rolls I65 support the roll I61 which is being wound up. Two sizes of the roll I51 are shown in Fig. 1 to illustrate the point that as the The linear velocity of the surfaces of the rolls I55. A gravity operated roller I59 biases down the roll I51 as it is formed. The roller I59 has gudgeons- I1l in slots I13 in the frame I5I. The rolls I65 are 2,882,929 3 drying rolls I53, in which event the web after.

assembly may be led directly from the unit I to the wind-up unit'3.

A clutch is provided as indicated at III for declutching the drive I18 thereby providing for stopping wind-up of the web. At this time the cradle I3I is lifted and pressure released from the rolls I9 and 20. However, the intaglio'roll 5| and the adhesive transfer rolls III! and III may continue to operate during recesses, such as a lunchhour or the like. Thus there is no danger of having adhesive dry on the rolls. Hence when it is desired again to start production, the cradle I 3| is depressed, the rolls I8 and 20 tightened and the wind-up roll again thrown into operation by closing the clutch Ill. Thus the adhesivewill be continuously rotating and ready at all times for starting production.

It will be noted that the position of the web I2 and its supply roll I51 [beneath the drying rolls I53 results in the possibility of close-coupling of the unit I with the unit 2.

While one web is shown assembled with one covering web I2, with adhesive therebetween, several adhesive-applying units'such as I may be set up' for delivering webs such as II which may be adhered together so as to form a multi-ply structure containing greater than two plies. In.

, of production of various pattern lengths for various bag sizes and the like, by providing for the use of various sizes of the intaglio roll 5|. The rockdriven by gears I15 and a pinion I111. The pinion 40 ing frame .53 allows for using various sizes of -I1'I is driven through a sprocket and chain drive I19 from a sprocket IBI on the shaft 45. The

1 drive ratio between draw rolls I9, 20) and windup rolls I65 is such that the surface speed of the wind-up rolls I55 is 3% or 4% greater than the surface speed of the draw rolls I3, 20. Hence the web is always maintained in good tension throughoutthe apparatus. A slight amount of slippage between the surfaces of the rolls I and surface of the web roll I51 results, but this is not so harmful.

The drums I53 are driven only by the webs- II, I2 and do not drive them. Not only does this simplify the mechanical structure, but it results" in prevention of wrinkling of the web, as I35 occurs'when the drying rolls are power driven.

Furthermore they are not used as pressure rolls, which heretofore has favored wrinkling.

The rolls I53 are supplied through suitable glands at their bearings with a heating fluid such 0 as steam or hot water, the inlet lines being sho at numerals I83 and the outlet lines at I85. Supply and exhaust headers are shown at I81 and I89 respectively. Instead of heating the idler drying rolls I53, they may be supplied with a may also be required at the pan I23 to maintain it in liquid condition for application to the web. Or, cold adhesive may be used, such as casein, vegetable glues, etc. 7 Y

It is also to be understood that with certain these while maintaining a proper positional relationship with respect to the transfer roll I03.

The rocking cradle I3I at the same time allows of arcuately meeting any size roll with theweb I I and for removing the web from the intaglio roll when desired An advantage of the invention is the fact that the cradle I3I along with the rolls I21 effects a concavely arcuate contact with the web and the intaglio roll 5i, instead of the ordinary straight line kissing" tangent. This arcuate condition assures that the most emcient transfer of adhesive from the intaglio depression is obtained from the intagll impression 91 to the web, even with the deep intaglio recesses required for adhesive.

Intaglio rolls may bechanged not only to make provision fora change in bag length but also for making a change in depth of the impression 51 to meet various conditions of adhesive. paper web n the printing is to be done 1mion a. web, the necessary marks may be applied to the web I I by means of markingapparatus indicated dlagrammatically at I95 in Fig. 8. Such apparatus will be driven from means which moves at a rate proportional to the surface speed of the intaglio roll 5I. Further description of such apparatus is not given since its character is known. When necessary,'various types of crease bars, slitters 7 mg the like may be used in association with the e a l 'Herein the terms adhesive, paste and glue are adhesives it may be possible to dispense with the 7 to be taken as synonymous.

I claim: I c

1. Web ting apparatus comprising an intaglio past roll, a frame mounted for rocking Under the provisions of Rule 43 reference is hereby mad to mycopending application Serial No. 507,961, filed October 28, 1943, for Laminating apparatus.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in the mbova constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

adjustments about an axis and carrying said roll,

means for driving said roll in any position of the frame comprising a gear train starting with a gear on said axis, means for delivering paste to' with respect to which said adjustment is made, a i

scraper carried on said adjustable frame and cooperating with the surfaceof the roll to reaasaoao now paste at points except those in the depression. means for rotating the roll in the frame comprising a gear train including-a gear centered on said axis, 'a power source. variable speed means for driving said gearv from said power source, means driven from said power source for drawing a web past said roll at a fixed relative speed as determined by said variable speed means; and means for directing said web to arm:

'ate engagement with the roll.

. 3. Web pasting apparatus comprising an intaglio paste roll, a framesupporting said roll for rocking adjustments about an axis. paste supply means for th -intaglio roll, a scraper carried on said adLiustable frame and cooperating with the surface of the roll to remove paste at points except those cooperating with the surface of said roll, means for rotating the roll in the frame comprising a gear train including a gear centered on said axis, a power source, variable speed means for. driving said gear from said, power source,

means driven from said power source for drawing a web past said roll at a fixed relative speed to the surface speed of the roll as' determined by said variable speed means, means for directing said web into arcuate engagement with the roll, said last-named means comprising a rocking cradle movable to and from said intaglio roll, spaced guide rolls in the cradle over which the web is threaded, said spaced guide means when arcuate to the intaglio roll bringing about said arcuate engagement with the surface of said-intaglio roll.

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