US2000325A - Gluing machine - Google Patents

Description

May 7, 1935. c. F. FORD ET AL 24,000,325

GIIUING MACHINE I x Filed July 15, 1952 z'shets-sheet 1 63 INVENTORS T/kE/g ATTORNEY I May 7,' 1935. e. F. FORD ET AL GLUING MACHINE Filed July 15, 1932 3 Sheets-Sheet 2 Re mw mp W: m E 6 W LTE'E BY May 7, 1935. G. F. FORD ET AL GLUING MACHINE Filed July 15, 1952 3 Sheets-Sheet 5 HWENTORS 650265 E F080 wnz 7i 5 PjT/VA/V THE/2 ATTORNEY Patented Ma y 7, 1935 UNITED STATES PATENT OFFICE GLUING MACHINE George F. Ford, Los Angele s, and Walter F. Pittman, Huntington Park, Califl, assignors to Fibreboard Products Inc., San Francisco, Calif., a corporation of Delaware Application July 15, 1932, Serial No. 622,670

8 Claims. (Cl. 91-50) I vided for the impression roll, adapting the same Our invention relates to a gluing machine, and

particularly to a machine for applying glue on.

blanks of sheet material, such as the blanks from which cartons are folded.

It is among the objects of our invention to provide a gluing machine which is capable of a materially greater output than -the machines heretofo're employed. 7

Another object of our invention is to provide a machine of the character described which is The invention possessesother objects and features of advantage, some of which, with the foregoing, wiil be set forth in the following description of our invention. It is to be understood that we do not limit ourselves to this disclosure of species of our invention, as we may adopt variant embodiments thereof within the scope of the claims.

Referring to the drawings:

- Figure 1 is an end elevational view of the gluing machine embodying our invention.

Figure 2 is a plan view showing the blank of material upon which the glue is deposited.

Figure 3 is a plan view of the machineyand Figure 4 is a rear elevational view of the same.

In the past, gluing machines have used the stencil form of glue unit, that is, the glue is stamped on the blank of material while the blank is held in a stationary position. The intermittent action of these machines results in slow operation, and renders it almost impossible to regulate the glue deposit. 'Our invention contemplates the provision of a machine which will permit a continuous, smooth and rapid flow of the blanks therethrough, and which will accommodate adjustments to control the-character of the glue deposit.

In terms of broad inclusion, the gluing machine embodying our invention is in the nature of a rotary machine and comprises a gluing roll and means for applying glue on the roll, together with means for feeding blanks of material past the roll. An impression roll having a normal position adjacent the gluing roll is provided for supporting the blanks, and means are preferably provided for adjusting the normal position of the impression roll relative to the gluing roll.

Movable mounting means are preferably proment of the gluing roll are provided for releasing the latch. A finger bearing against the blank is provided for controlling the operation of the releasing means. Means, also timed with .the movement of the gluing roll, are provided for re-,

-- turning the impression roll to its normal position.

A reservoir is preferably provided for holding the glue, and a pick-up roll is positioned to dip into the glue. A roll is also provided between the pick-up and gluing,rolls for transferring the glue from the first tor the latter, and means are provided for adjusting the position of the, transfer roll relative to the pick-up and gluing rolls. The gluing roll preferablycomprises a cylinder provided with a demountable jacket on which radially extending glue pads are selectively arranged. These pads receive the glue from the transfer roll and deposit it on predetermined areas of the blank of material as the latter moves therepast.

In greater detail, the gluing machine embodying our invention preferably comprises a pair of side frames 2 mounted on a table or other suit able support 3 and connected by a transversely extending beam 4. A cross shaft 6 is provided, I journaled in the end frames 2, and serves to carry the gluing rolls 1. In the machine chosen for purposes of illustration the mechanism is designed to apply deposits of glueon predetermined areas 8 on a blank of material 9, such asthe carton blank shown in Figure'2. In order to effect this application of glue, a pair of the gluing rolls 1 are provided.

These rolls preferably comprise a cylindrical core portion II on which a jacket I2 is demountably secured by suitable bolts IS. The jacket I! is provided with a pair of radially extending glue pads I4 suitably spaced and shaped and proportioned to deposit glue on the predetermined areas 8 when the gluing roll is rotated and the blank 9 is moved therepast. For purposes of adjustmentfslots I5 are provided, through which the locking bolts I 3 pass. By this arrangement the sleeves I2 maybe shifted. on the cylindrical core I l to adjust the position of the glue pads a complementary groove in the core I I serves to maintain the alignment of the jacket.

Means are provided for applying glue on the pads of the gluing roll. A pair of glue reservoirs l! are provided adjacent the gluing rolls 1. These reservoirs are formed by a channel portion l8 closed at the ends by suitable plates l9 mounted on the cross beam 4. These reservoirs are-connected by an oblong cross duct 2| having an upwardly extending funnel portion 22. A removably mounted ring 23 is seated in the upper.'end of this funnel portion, and provides a seat for the neck of an inverted glue supply bottle 24.

A pick-up roll 26 is positioned to project into each of the. reservoirs H; the rollers being mounted on shafts 21 journaled in the end frames 2 and the reservoir end plates I9 passing through suitable stufling boxes 28. A roll 29 is positioned between eachpick-up roll and its adjacent gluing roll for transferring the glue from the former to the latter. These transfer rolls are carried by a cross shaft 3| journaled in suitable eccentric bearings 32.

The latter bearings are rotatably' connected by an overhead cross bar 33 extending transversely of the machine. By this arrangement the position of the transfer rolls 29 relative to the pick-up and gluing rolls maybe adjusted; the adjustment being effected by merely shifting the position of the cross bar 33. The bar is held in a selected adjusted position by a threaded rod 34 having a pair of adjusting nuts 36 engaging an upright'3'i which is mounted on one of the end frames 2.

Means are provided for varying the thickness of glue collected by the pick-up rolls 26. To this end the scrapers 38 are provided; each scraper being mounted on a shaft 39 journaled in the end plates IQ of the reservoirs. vAn arm 4| is mounted on an outer end of each of the shafts 39, and suitable tension springs 42 are connected with the arms to urge the scrapers 38 away from the peripheries of the pick-up rolls. The adjustment of each scraper is effected by a thumb screw 43 bearing on a lug 44 connected with the scraper. By adjusting the scrapers 38 and the transfer rolls 29 the thickness of the films of glue applied on the gluing pads l4 may be selectively A'grooved impression roll 52 is provided under each of the gluing rolls 1 to supportthe blanks of material while receiving glue from the glue pads I4. These rolls 'are carried by a cross shaft 53 journaled in suitable blocks 54 slidably mounted on'the end frames 2. The blocks 54 are urged upwardly by suitable springs 56, and the upper position of the bl'ocksis determined by suitable limit screws 51. Thus, the position of the impression rolls relative to the gluing rolls may be selectively varied by turning the set screws 51. In the event that a double thickness of material is accidentally fed through the machine, the supporting springs 56 will give and prevent damage to the machine or its adjustment.

The pick-up rolls 26, transfer rolls.29, gluing rolls 1 and impression rolls 52 are timed in their movements so that the peripheral speeds of each is the same. This is accomplished by a suitable gear train 58 disposed adjacent one of the end frames 2. Note Figures 3 and 4. The pick-up roll shaft 21 on the side opposite this gear train is connected for rotation with the transfer roll shaft 3| by suitable gears 59, so that both of the shafts 21 run at the same speed. The system of rolls is preferably driven by a chain 6| running over a sprocket 62 mounted on the gluing roll shaft 6.

Means are provided for-timing the movement of the conveyor chain with the movement of the gluing roll, so that the blanks of material will properly register with the glue pads l4 when the former are fed through the machine. To accomplish this, the drive chains 60 and 6| are timed in their movements by suitable gears 63. Note Figure 1.

With the impression rolls in their normal position adjacent the gluing rolls it is'likely that these rolls would receive a certain amount of glue from the glue pads I 4, in the event that there should be a blank/of material missing on the conveyor chain. The following blank would then receive this glue on its under side, which of course is undesirable. In order to preclude this from happening, means are provided for depressing the impression rolls when a blank of the material is Each of the arms 66 is held in the normally horizontal position by a suitable latch arm 6? pivotally mounted on the end frames 2. The lower end of the latch arm is hooked to support the outer end of the eccentric arm 66 and is shaped to facilitate engagement of the eccentric arm when the latter moves upwardly.

Means are provided for releasing the latches when the glue pads I4 approach the impression rolls 52 and there is no blank on the conveyor chain. For this purpose a cam 69 is provided adjacent one end of the machine and is mounted flczr rotation with the gluing roll I by suitable gears with the latch arm on the same end of the machine, and comprises a lever 'I2pivoted on the end frame 2 and having a follower roller 13 riding on the cam 69. A rod 14 is arranged to connect the follower arm or lever 12 with the latch arm 61; the end connecting with the latch arm being slotted to receive the arm fixed pin 16, so that the latch arm is permitted slight movement relative to the connecting rod. A spring 11 is provided to resiliently urge the latch pin 16 toward the inner end of the slot,so that the latch arm 61 is held against the outer end of the eccentric arm 66:

A spring 18 is interposed between the linkage and the end frame 2 and operates to hold the follower roller 13 against the cam 69, and likewise urge the latch arm 61 out of engagement with When these arms are rotated down- A linkage is provided connecting the "cam 1 vided for removing the same.

mounted on a cross shaft 98 journaled in the.

The absence of intermittent and reciprocating actions characterizes the machine with a smooththe eccentric arm 86. The cam 89 is provided with a fiat portion 19 arranged so that the follower arm or lever 12 will move inwardly to disengage the latch when the glue pads I4 approach the impression roll 52.

Means are provided for rendering this releasing action inoperable when a blank of material is approaching the gluing roll. To accomplish this, a' pair of fingers 8| are'provided and are positioned to bear downwardly against a blank of material on the conveyor. These fingers are mounted on, a shaft 82 extending transversely of the machine.

The conveyor table 50 is provided with suitable slots 83 so .that the fingers may rotate downwardly when a blank is missing. The end of the shaft 82 adjacent the side of the machine having the control cam 69 is provided with a lever 84, and the end of this lever is connected with thefollower arm 12 by means of a link 86. I

By this arrangement it is evident that'the follower arm or lever 12 cannot move inwardly to release the latch while a blank of material is passing under the fingers 8|, even though the flat portion 19 of the cam 89 is under the follower roller 13. Thus, automatic means are provided for depressing the impression roll in the absence of a blank of material, and for preventing the impressionroll from lowering when a blank of material is approaching the gluing rolls. The opposite side of the machine is provided with a similar latching mechanism, but in this case the cam is omitted. The movement afforded by the cam 89 is transmitted to the latching mechanism on the opposite side of the machine through the finger shaft 82. 4

Means are provided for returning the impression rolls to their normal positions after the latches have been tripped. For this purpose a cam 89 is provided on each end of the gluing roll shaft 6. These cams are operatively connected to the eccentric arms 66 through a suitable linkage comprising the bellcranks 9| having at one end the follower rollers 92 riding on the cams 89. The other ends of the b'ellcranks are connected to the arms 88 by suitable links 93. Springs 94 are provided to hold the following rollers 92 in engagement with the cams. Ofcourse these springs also tend to rotate the eccentric rial is missing on the conveyor and the fingers" 8| permit the cam 89 to release the latch, the cams 89 simultaneously permit the eccentric arms 88 to rotate downwardly to depress the impression rolls. Of course the cams 89 are ineffective when the latch arm 61 is engaged.

In case that glue accidentally drops on the impression rolls 52, suitable doctors 91 are pro- These doctors are 'fed therethrough continuously and rapidly.

ness and accuracy of operation which has never before been realized. The adjustments which are possible, and which are in fact provided,;permit the thickness and character of thewfilm of applied glueto be regulated. Also, the improved machine insures the application of a smooth and uniform deposit. Furthermore, the mode of operation of the machine and the several adjustments provided minimizes waste in the application of the glue.

We claim: v

l. 'A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing roll for supporting the blank and having a retracted said latch to retract the impression roll.

2. A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the-gluing roll for supporting the blank and having a retracted position away from said roll, means mounting the impression roll for movement from one to .the

other of said positions, means urging the impression roll toward the retracted position, a latch engageable with said mounting means for holding the impression roll in its normal position adjacent the gluing roll, means for releasing said latch to retract the impression roll, and means including a finger bearing against the moving blank for controlling the operation of the releasing means. i

3. A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing rollfor supporting the blank, movable mounting means for the impression roll adapting the same for movement from its normal position adjacent the the roll, means for feeding the blank past said.

' roll, movable mounting means for the impression roll adapting the same for movementfrom its normal position adjacent the gluing roll to a position removed therefrom, means urging the roll toward the latter position, a latch for holding the impression roll in its normal position, means timed with the movement of the gluing roll for releasing the latch, and means also timed with the movement of the gluing roll for returning the impression roll to its normal position.

5. A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing roll for supporting the blank, movable mounting means for the impression roll adapting the same for movement from its normal position adjacent the gluing roll to a position removed therefrom, means urging the roll toward the latter position, a'latch for holding the impression roll in its normal position, means for releasing the latch, and means including a cam connected for rotation with the gluing roll for returning the impression roll to its normal position.

6. A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing roll for supporting the blank, movable mounting means for the impression roll adapting the same for movement from its normal position adjacent the gluing roll to a position removed therefrom, means urging the roll toward the latter position, a latch for holding the impression roll in its normal position, means including a cam mounted for rotation with the gluing roll for releasing the latch, and means including a second cam mounted for rotation with the gluing roll for returning the impression roll to its normal position.

7. A machine for depositing glue on a blank of material, comprising a gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing roll for supporting the blank, eccentric mounting means for the impression roll operable upon rotation to move the impression roll from its normal posi-' tion adjacent the gluing roll to a position removed therefrom, an arm connected to rotate with the eccentric mounting, a spring connected to rotate the arm and operating to urge the impression roll toward the latter-position, a latch for holding the impression roll in its normal position, means for releasing the latch, and means for returning the impression roll to its normal position.

8. A machine for depositing glue on a blank of material, comprisinga gluing roll, means for applying glue on the roll, means for feeding the blank past said roll, an impression roll having a normal position adjacent the gluing roll for supporting the blank, eccentric mounting means for the impression roll operable upon rotation to move the impression roll from its normal position adjacent the gluing'roll to a position removed therefrom, an arm connected to rotate with the eccentric mounting, a spring connected to rotate the arm and operating to urge the impression roll toward the latter position, a latch engageable with said arm, and operable to resist the action of said spring for holding the impression roll in its normal position, a cam mounted for rotation.

with the gluing roll, a linkage actuated by said cam and operably connected with the latch for releasing the same, a finger bearing against the moving blank and connected with the cam linkage for controlling the operation thereof, a second cam mounted for rotation with the gluing roll, a linkage actuated by said second cam for returning the impression roll to its normal position;

l GEORGE F. FORD.

WALTER'F. PI'ITMAN.

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