US2294520A - Adhesive applying mechanism for paper fabricating machines - Google Patents

Description

Sept. 1, 1942. E, s, STAUDE 2,294,520

ADHESIVE] APILYING MECHANISM FOR PAPER FABRICATING MACHINES Filed May as, 1940 4 Sheets-Sheet 1 Sept. 1, 1942'. E. e. STAUDE ADHESIVE APPLYING MECHANISM FQR PAPER FABRICATING MACHINES Filed May 23, 1940 4 Sheets-Sheet 2 //v I/EIN TOR E. G.-STAUDE 2,294,520

ADHESIVE APPLYING MECHANISM FOR PAPER FABRIQATING MACHINES- Sept. 1, 1942.

Filed May 23, 1940 4 Sheets-Sheet :5

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UNITED STATES PATENT OFFICE ADHESIVE APPLYING MECHANISM FOR PAPER FABRICATING MACHINES.

Edwin G. Staude, Minneapolis, Minn. Application May 23, 1940, Serial No. 336,833 8 Claims. (Cl. 91-50) This invention relates to improvements in machines of the type shown and described in the a Patent No. 1,969,106 which was issued to me on August '7, 1934, and it particularly relates to improvements in the adhesive applying mechanism of such machines.

The object of this invention is to provide improved means for printing an adhesive boundary aroundopenings, or windows in paper cartons, to which a'transparent material is then applied.

This improved mechanism may also be adapted.

for use in various other impression operations where exact and full control of the impression roll is essential, and where self-cleaning and quick and easy removal of the complete impression roll unit is desirable for eflicient operation of the machine.

The primary object of my invention is to provide a self-cleaning impression roll for the gluing cylinder which is so constructed to immediately remove all offset" of adhesive which may be transferred from the adhesive applying cylinder to the impression roll in event the machine runs idle or when theautomatic feeder misses a blank or in event of a jam-up and for other reasons.

I am aware that self-cleaning impression rolls for holding blanks against glue dies are common even to the extent that they operate in a solvent for the adhesive. However, in every case the doctor blade or so-called glue scraper has the scraper pivoted behind the point of contact in direction of travel to prevent injury to the impression roll due to digging in or cutting the surface of the cylinder.

This construction has the disadvantage that heavy glue or partly dried glue will wedge in and cause the glue scraper or doctor blade to raise away from the impression roll and momentarily not accomplish the purpose for which it was intended.

Under my construction herein, I place the pivot for the doctor blade or glue scraper in advance of the point of contact and hold the doctor blade or glue scraper against the surface of the impression roll by a much lighter spring than would be possible under the conventional method.

and I also obtain a new result because instead of scraping of! the surface of the impression roll, I actually slice or "shave" the adhesive'clean from the impression roll. In order to get the best results I the surface of the impression roll so as to avoid any digging in or cutting of the surface of the said roll by the doctor'blade.

also harden- In practice I find the results even more gratilying that might appear from the drawings, and

should the attendant overlook supplying the solvent fluid, the doctor blade when mounted as j shown in the drawings will act to clean the impression roll in a very satisfactory. manner by slicing, shaving or cutting the adhesive from the surface of the impression roll, even should the adhesive'or glue be dried on the surface due to the machine standing idle during lunch hour or over night.

My present invention consists of improved means for quickly and conveniently adjusting a driven self-cleaning impression roll into perfect alignment with an adhesive applying cylinder, to

a plied to said pressure roll to dissolve any trace of adhesive which may adhere thereto,

As a further object with certain adhesives or liquid material I may use the self-cleaning pressure roll without the solvent material by merely using the cleaning scraper made of thin spring steel and vibrated in the position shown in the drawings, which I believe to be new- My invention consists, further, ofthe features and constructions described in the following specification, as shown in the accompanying drawings, and as specifically recited in the annexed claims.

In the drawings- Figure I is a plan view of the lower part of a paper working machine embodying my invention, and in which is shown two rows of carton blanks passing through the several inter-connected units of which said machine is composed.

Figure 1A is a vertical, longitudinal cross-section through the central portion of the machine shown in Figure l, and showing the location of my improved adhesive applying unit therein.

Figure 2 is a vertical cross-sectional view, taken on line 22 of Figure 1, showing the relative parts of the adhesive printing unit of the ma- Figure '7 is a view of the other end of said casing.

Figures 1 and 1A, show the location of my improved pressure roll unit in a machine which applies transparent windows to paper carton blanks, and in this figure a double row of carton blanks are shown passing in continuous procession through the several units of the machine which are mounted between frame members A-A, while B, C and D indicate some of the cross bars which connect said frame members and support some of said units.

A hopper E at one end of the machine holds a supply of carton blanks in position to be engaged by feed 'wheels F which project single carton blanks G successively on to conveyor chains H having projecting lugs J which engage the rear edge of the projected blanks to convey saidblanks in equally spaced formation toward the rear end of said machine. The chains H run in guides K and are driven in timed relation with other parts of the machine by a transmission means (not shown) connected with shaft ll,

while the edges of said blanks slide freely in guideways M.

A single row of the larger size blanks or a double row of the smaller size blanks are thus conveyed through the machine past an adhesive applying unit N, and a window applying unit 0, onto a receiving apron P where said blanks are counted and stacked preparatory to being removed by an attendant.

Figure 2 shows the adhesive applying cylinder or roll I0 mounted on a shaft II, immediately above the path of the carton blanks G, and suitably shaped pads I2 are secured by screws I3 to the periphery of said cylinder which is provided with numerous threaded holes I4 to permit various sizes and shapes of pads to be secured in any desired position thereon. The pads I2 contact an adhesive supplying roll R to receive a film of liquid adhesive which, in turn, is transferred to the passing blanks,- while the cylinder III is driven bya transmission gearing Q in synchronism with the conveyor chains H, so that the ad blanks, I provide a smooth-faced impression roll I5, of smaller diameter, directly beneath the cylinder' IO, and reduced diameter end shafts I6 and I1 support the roll. I5 inbearings I8 which are mounted on the ends .of a casing l9. The end shaft I 6 terminates in a, flange 20 having a recess 22 which is integral with a stub shaft 23 on which sear 24 is secured. The gear 24 meshes with a larger gear 25 on a driventransmission shaft 25,

ito revolve the stub shaft 23, the coupling flanges 20 and-22,"and the roll I5. A gear is secured to the end shaft I6 in position ,to engage an idler pinion 23 which, in turn, engages a gear 29 on the outer end of an intermediate shaft 30, which has bearings in the ends of the casing I9 beneath the roll I5, and another idler pinion 3| connects the gear 29 with a gear 32 on a bottom shaft 33 which also has bearings in the ends of the casing I9, and packing glands 34 are provided to prevent escape of the solvent liquid 35 through the last mentioned bearings. A tubular roll 33' is secured to the shaft 33 so as to revolve in said solvent liquid, while a roll 30' is secured to the intermediate shaft 30 and arranged to contact 5), and a scraper or doctor blade 31 on said bar has a longitudinal edge held in yielding contact with the roll' I5 by a spring 38 which extends y from an adjustable arm 40 on said bar to a projecting bolt 39 on the packing gland 34. The

bar 36 is reciprocated by a crank pin 4I which has a sliding block connection 42 with a yoke 43 on the extending end of the bar 36, while the crank pin 4| projects from a worm gear 44 which is supported by a bracket 45 in position to be actuated by a worm 46 on the end of the shaft I! of the driven roll I5. A 'guard strip 41 is fastened to an upper edge of the casing I9 and extends over on to the roll I5 to keep lint and other waste matter from entering the casing, while a drain plug is removably located in the bottom of said casing, and a filling hole 49 having a removable stopper 50 is disposed on one side and a glass covered opening 5| is provided on the other side of said casing.

The casing I 3 is supported beneath the cylin der I0 by a channel shaped cross member 52, which extends from one frame member A to the transmission housing 53 on the other frame member A, and pressure bars 54 are yieldingly mounted on the vertical flanges of said cross member by a series of screws 55 that limit the vertical movement of'said pressure bars which 'are forced upwardly by a series of compression move upwardly far enough to press a very thin to receive a projection 2| on an adjoining flange carton blank against the transferpads, but it is also important that said roll does not move far enough to contact the transfer pads when a carton blank fails to be in position between said roll and pads, as the adhesive would then be transferred to the roll. It is therefore essential to provide means for quickly and accurately adjusting' the upward movement of the casing I9 to suit blanks-of various thickness, and to compensate for slight variations in the thickness of transfer pads.

For the purpose of accurately limiting the upward movement of the casing. I9, I provide longitudinal flanges 51 at the bottom edges of said casing, and said flanges enter grooves 58 in side bars 59vwhich depend on eachside of the cross member 52 where theyare loosely held against said member by screws 53' which pass through elongated holes 66 in said side bars. Small rock shafts 6| and 6| are arranged crosswise in the adhesive from said impression roll, said recip- Q rocating wiping means being positioned beyond 6| and 6| are oscillated in their bearings the crank pins 62 will cause a slight vertical movement of the side bars 59 and the casing l9. As it is sometimes necessary to adjust each end of the casing |9 separately, in order to obtain correct printing contact at both ends of the adhesive applying cylinder I6, I provide independent adjusting means for the shafts 6| and 6|, and said means consist of rods 64 and 65 which extend through holes in the frame member A and is provided with hand-wheels 66 and 66' on the outside and a collar 61 on the inside of said frame members. The inner end of the rods 64 and 65 are loosely threaded into hubs 68 which have a forked end pinned to the upper end of vertical arms 69 and 69 on the shaft 6|, to which the arm 69 is secured, while a connecting rod 10 extends from the'loosely mounted arm 69' to an arm 10 which is secured to the shaft 6|. When the rod 64 is rotated by the handwheel 66, the shaft 6| will be oscillated to move one end of the casing I9 up or down as desired,-

and when the rod 65 is rotated by its hand-wheel the shaft 6| will be oscillated to move the other end of the casing |9 as desired, while tension springs H, which have one end attached to studs 12 and the other end attached to arms 13 on the shafts 6| and 6|, serve to counter-act the upward pressure of the compression springs 56 so as to take up any lost motion and prevent rattling, and by friction of the parts hold the hand-wheels 66 and 66' in adjusted position.

From the foregoing description it will be apparent that the casing I9 is adjustably held in its upper position by the pressure bars 54 which force the flanges 51 against the upper edge of the grooves 58, and any fjam-up or double blanks will cause the glue die I! to force the impression roller l5 together with the casing l9 against the tension of the springs 56, thereby causing a yielding or cushion action- It is also possible to remove the casing I9 as an independent unit by simply. turning the hand wheels 66 and 66' which will rock the shafts 6| and 6| and because of the eccentric mounting of such shaft (see Fig. 5) it will cause'the side members 59 to raise, release' or unclamp the guides 51 on the casing l9 and the casing I9 can then be removed 'by pulling it outwardly through an opening 14 which is provided in the frame member A for that purpose. I consider this construction an important feature of my invention, as it enables the operator to quickly remove the entire unit for cleaning or repair purposes without tools and without disturbing any other parts of the machine, the unit being uncoupled by the loose coupling connection 22. r v

I claim as my invention:

1. A paper fabricating machine having means for conveying a series of paperblanks into contact with a rotating adhesive applying cylinder,

a driven rotating impression roll arranged to press said blanks against said cylinder, a reservoir adapted to hold an adhesive solvent means for supplying a continuous film'of adhesive solvent to the surface of said impression roll, a reciprocating wiping means in contact with the moistened surface of said impression roll and the line of contact of said impression roll and said supplying means in direction of travel of said impression roll whereby said impression roll will revolve towards said reciprocating wiping means.

2. A paper fabricating machine having means for conveying a series of paper blanks into contact with a-rotatingadhesive applying cylinder,

'a spring mounted frame and a drivenrotating impression roll mounted in saidframe and arranged to yieldingly press said blanks against said cylinder, a reservoir containing an adhesive dissolving liquid disposed below said impression roll, means for transferring a film of said liquid to the surface of said impression roll, and a reciprocating wiping means in contact with the moistenedsurface of said pressure roll to remove said film of liquidor offset adhesive.

3. A paper fabricating machine having means for conveying a series of paper blanks into contact with a rotating adhesive applying cylinder, a driven rotating impression roll mounted in a reservoir containing an adhesive dissolving liquid and located immediately below said cylinder, means in said reservoir for continuously supplying a film of said liquid to the surface of said impression roll, a wiping device contacting said impression roller means connected with said reservoir for reciprocating said wiping device in contact with the moistened surface of said impression roll to remove said film and return it to said reservoir, said reciprocating wiping device being anchored beyond the line of contact with said impression roll in direction of travel whereby said impressiom roll will revolve towards said wiping device, and clamping means for holding said reservoir securely in position.

4. A paper fabricating machine having means for conveying a series of paper blanks into contact with a rotating adhesive applying cylinder, a rotating'impression roll mounted in a reservoir containing an adhesive dissolving liquid and located immediately below said cylinder, means in said reservoir for continuously supplying a film of said liquid to the surface of said impression roll, and means connected with said reservoir for reciprocating a wiping device in contact with the moistened surface of said impression roll to remove said film and return itto said reservoir, and independent means for vertically adjusting either end of said reservoir to move said located immediately below said impression roll,

adapted to remove said film of liquid or offset means insaid reservoir for continuously supplying a film of said liquid to the surface of said impression roll, and means connected with said reservoir for reciprocating a wiping device in contact with the moistened surfaceof said impression roll to remove said film and return it to said reservoir, and independent means for vertically adjusting either end of said reservoir to move said impression roll into suitable pressure contact .with said blanks for perfect impressions of adhesive thereon, and resilient means arranged between said reservoir and said adjusting means for the purpose of forcing said 4- v I 1 t 2,294,520

impression roll against said blanks with a yield- 'ing pressure which will allow the passage of an tact with a rotating adhesive applying cylinder, a driven spring-mounted impression roll located adjacent to said cylinder and arranged to yieldingly press said blanks against said cylinder, an

5 impression roll cleaning member comprising a thin, fiat, material, said cleaning member being anchored beyond the line of contact with said impression roll in direction of travel whereby said impression roll will revolve toward said cleaning member for the purpose specified.

8. A paper fabricating machine having means for conveying a series of paper blanks into contact with a rotating adhesive applying cylinder, a driven impression roll located adjacent to said pression roll to remove said film and return it 15 cylinder and arranged to press said blanks to said reservoir, andindependent means for vertically adjusting said reservoir to move said impression roll into suitable pressure contact I with said blanks for perfect impressions thereon andresilient means supporting said reservoir to force said impression roll against said blanks with yielding pressure.

'7.- A paper fabricating machine having means for conveying a series of paper blanks into conagainst said cylinder, an impression mil cleaning member comprising a thin flat metal spring, said cleaning'member being anchored beyond the line of contact with said impression roll in di- 20 rection of travel whereby said impression roll.

will revolve toward said cleaning member, and means for reciprocating said cleaning member.

EDWARD G. STAUDE.

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