US1479683A - Square-can-coating machine - Google Patents

Description

Jan. 1, 1924 Y 1,479,683

- T.L.TAUAFERRO SQUARE CAN COATING MACHINE Filed til 6 1921 3 Sheets-Sheet 1 T. L. TALIAFERRO SQUARE CAN COATING MACHINE Filed April 1921 3 Sheets-Sheet 2 Jan. 1,19 1,479,683

' T. L. TALIAFERRO SQUARE CAN COATING MACHINE v Fi'i'ed April 6, 1921 3 Shets-Sheet 5 @513 I WW Patented Jan. 1, 1924.

nrrso STATES THOMAS LUGIEN TALIAFERBO, OF CHICAGO, ILLINOIS.

SQUARE-CAN-COATING MACHINE.

Application filed April 6, 1921. Serial No. 459,073.

To all whom it may concern.

Be it known that I, THOMAS L. TALLA- rnano, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Square-Can- Coating Machines, of whichthe following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in machines for coating covers for cans or the like with sealing ma terial, and more particularly to a cover that has straight sides and rounded corners.

An object of the invention is to provide a machine wherein the coating is scraped on to the cover by the edge of the cover contacting with the coating device or devices.

A further object of the invention is to provide a machine of the above character wherein opposite side edges of the cover are sin'iultaneously coated.

A still further object of the invention is to provide a machine of the above type having parallel coating rolls which are con structed and mounted so that the curved corners of the cover are coated by the edges thereof making scraping contact with the rolls as well as the straight sides of the cover.

A still further object of the invention is to provide a machine of the above type wherein the cover is continuously progressed through the machine and all four sides and the rounded corners therebetween are coated by scraping contact of their edges with the coating device or devices.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by Way of illustration one embodiment of the present i n venti on Figure 1 is a plant view showing a portion of a machine embodying my improve ments;

Fig. 2 is a veiw partly in side elevation and partly in section on the line 2-2 of Figure 1;

Fig. 3 is a diagrammatic view showing two of the coating rolls and the cover as it enters between the rolls and at the time when portions of the rounded corners are being coated;

Fig. 4 is a view similar to Fig. 3, but show ing the rolls as separated to let the cover through, and the side edges as being coated; i

Fig. 5 is a view similar to Fig. 3, but showing the cover as leaving the rolls and portions of the rounded ends at the opposite end of the cover being coated, and i Fig. 6 is a view showing the covers progressing in a transverse direction to its first direction of movement and being received by the rolls which coat the remaining portions of the rounded corners and the end portions of the cover.

The invention broadly consists in a machine for coating a cover for cans or the like, which cover has parallel side edges and parallel end edges with rounded corners therebetween. The cover is progressed continuously through the machine while it is being coated and this is accomplished preferably by endless conveyors which engage the cover and move it first in one direction and then in a direction at right angles thereto. While the cover is being moved along its first path of movement, it is' presented to two coating rolls which are spaced and are yieldingly mounted. The ends of the rolls also are tapered and the rolls are so set that the distances between their straight faces are less than the width of the cover so that when the cover makes contact with the rolls, sub stantially half of the rounded corner sections will engage the tapered ends of the rolls and the cover will force the rolls apart so as to pass between them, and as the cover leaves the rolls, half of the opposite rounded corners will engage the tapered ends of the rolls at the rear thereof, after which the cover is transferred to the other conveying means and is again presented to similarly mounted and positioned coating rolls, which scrape the coating on to the ends of the cans and the remaining portions of the rounded corners. The cover travels in a plane containing the axes of the coating rolls or substantially so, and the edge of the metal forming the-cover scrapes the coating material off from the roll. The thickness of the coating on the rolls is regulated by 7 suitable means and the rolls, may, if desired, be corrugated so as to break up the coating surface of each roll.

Referring more in detail to the drawings, my improved coating machine consists of a supporting framework 1 carrying a table 2. The cover is received by the endless conveyor, consisting as herein shown of a sprocket chain 3 which runs over sprocket wheels 4 and 5. The sprocket wheel 4 is mounted on a shaft 6 carried by brackets 7, which in turn are mounted on the supporting table 2. The sprocket wheel is mounted in brackets 8 which are likewise mounted on the table 2. The sprocket wheel 5 is fixed to a shaft 9 which is driven by means of a bevel gear 10 meshing with a bevel gear '11 on the short shaft 12. This short shaft 12 carries a sprocket wheel 13 (see Fig. 2), over which runs a sprocket chain 14, which in turn meshes with a sprocket wheel 15 on the main shaft 16. Said main shaft 16 is driven by a main sprocket drive 17 of any suitable character. The shaft 16 is mounted in hangers 18, 18 carried by the table 2.

This sprocket chain 3 runs in a slot 19 formed in a supporting plate 20 on which the covers rest. One of the covers is indicated at C in the drawings, another at C and still a third at C The sprocket chain 3 is provided with a series of fingers 21. These fingers are preferably arranged in pairs'and engage the rear edge of the cover to carry the same along the supporting plate, the cover traveling in the direction of. the arrow indicated in Fig. 1. Mounted at opposite sides of theguiding plate 20 are coating rolls 22 and 23. The coating roll 22 is carried by a suitable shaft which projects into slotted brackets, one of which is indicated at24 in Fig. 2 of the drawings. This bracket has a horizontally disposed oblong slot which permits the shaft to move freely back and forth in a horizontal direction. Mounted at one end of the shaft and adjacent the supporting bracket is a collar 25 which freely engages the shaft. This collar carries a rod 26 which extends through bearings 27, 27 carried by the bracket 24. A spring 28 located between one of the bearings 27 and the collar nor mally forces the roller toward the center of the machine and toward the path of travel of the cover. At the other end of the shaft for the coating roll, there is a similar collar 29 to which a rod 30 is attached which extends through a suitable bearing 31 in the supporting bracket for the shaft and a spring 32 normally forces this collar and the left-hand end of the coating roll as viewed in Fig. 1, inwardly, so that the coating roll by the springs 28 and 32 is normally pressed toward the dotted line position shown in Fig. 1. The coating roll 23 is likewise mounted in brackets 33, each of which is provided with a slot 34 in which the shaft 35 carrying the coating roll 23 is mounted. On the shaft 35 and at the right-hand end thereof, as viewed in Fig. 1, there is a collar 36 carrying a rod 37 sliding in suitable bearings, and a spring 38 is mounted on the rod and bears against the collar 36. At the other end of the shaft 35 there is a collar 39 carrying a rod 40 and spring 41 bears against the collar 39. These springs 38 and 41 normally press the coating roller 23 inwardly toward the dotted line position. The supporting plate 20 has upwardly bent side members 42 and an end member 43 which form the receiving plat form for the cover and serve to center the cover on the traveling chain so that when the lugs 21 pass through the slot in the supporting plate, which extends into the end flange 43, it will engage the cover and move it forward from the dotted line position shown in Fig. 1, to the full line position. This supporting plate 20 lies in a horizontal plane which contains the axes of the coating rolls, and as the cover is moved forward, its edges rolls, and the coating material on the rolls will be scraped on to the covers. The coating rolls 22 and 23 are tapered at 44, the receiving ends of the rolls, and are also tapered at 45, the opposite ends of the rolls. As above noted, the rolls are normally in the dotted line position shown in Fig. 1, and as the cover approaches the rounded corners, will engage the tapered end sections 44, 44 and will gradually separate the rolls against the tension of the springs bearing thereon so that the cover passes between he rolls, and the rolls will be yieldingly pressed against the cover during the time it is passing therebetween. Inasmuch as the edges of the cover will make contact with the rolls, the coating material on. the

rolls will be scraped off on to the cover. The rounded corners at the forward end of the cover as more clearly shown in Fig. 3, make contact with the rolls, first at the points 0, o, and the contact continues from this point around on to the side edges, and as the cover leaves the rolls shown in Fig. 5, it will make contact with the rolls'around to the point 7), 7). It will, therefore, be noted that half of each rounded corner makes contact with its respective coating roll which coats the side edges of the cover. 1

Associated with each coating roll is a trough 46 in which the coating material is placed. These troughs are of similar construction and each is carried by lugs carried by bolts 47, 47 mounted for vertical adjustment in slots 48 inthe end brackets 24. Associated with each roll is a scraper or doctor 49. These scrapers are shaped to conform to a longitudinal section of the coating rolls. Each scraper is adjustably secured at its ends to brackets provided with collars 50 which are fixedly secured to the rods at" tached to collars which move the roating rolls yieldingly toward the center of the machine, and therefore, the scrapers or docwill engage the coating I illustrated in the drawings.

turn, of course, varies the amount of coat-' ing that is scraped on to the cover as: -1t

passes along the rolls. The coating rolls as shown in the drawings, are provided with a series of annular grooves 52. Thisvenables the film or coating applied to the cover to be thinner or thicker, as desired, as it reduces the actual contact surface carrying the coating material. I have found that by a roll shaped as above stated, fl. am'able to handle the coating better than by the use of a straight surface roll, yet a straight surface roll may be used to advantage, and I do not desire to have it understood that I am limited to the particular form of roll Instead of making the roll with a straight face and straight tapered ends as shown in the drawings, it will be understood also that the roll may be oval or otherwise shaped, the essential thing being that the rolls shall be yield ingly mounted and so shaped as to make contact with a portion of the rounded corners as well as the straight. side of the cover.

The coating rolls 22 and 23 are positively rotated. On the end of the shaft 35 carrying the coating roll 23, there is a sprocket wheel 53. This sprocket wheel 53 is driven by 'a sprocket chain 54 running over a sprocket wheel 55 on the shaft 56 mounted in suitable bearings 57, 57 carried by the supporting table 2. The shaft 56 is in turn driven by a sprocket chain 58 which meshes with a sprocket wheel 59 on the main shaft 16. This coating roll 23 is rotated in a clockwise direction as viewed from the receiving end of the machine so that the mate rial is scraped off from the roll on to the upper face of the cover as it passes through the machine, the cover, of course, being placed in the machine, bottom side up, that is, the groove which makes contact with the cam body is up. The coating roll 22 is driven by a sprocket wheel 60 with which a sprocket chain 61 cooperates, and this sprocket chain runs over a sprocket wheel on a shaft 62 (see Fig. 1). The shaft 62 carries a bevel gear wheel 63 meshing with a bevel ear wheel 64 which in turn meshes with a lievel gear wheel 65 carried by a shaft 66. This shaft carries a sprocket wheel on its outer end which is driven by a sprocket chain 67 and the sprocket chain 67 meshes with a sprocket wheel 68 on the shaft 56. Through the bevel gears 68, 64 and 65, the shaft carrying the coating roll 22 is caused to rotate in an opposite direction from the shaft carrying the coatlng roll 23, so that the coating roll 22 rotates in a counter clockwise direction as viewed from the receiving end of the machine. These bevel. gears 63, 64 and 65 are all in rear of the bracket 8 and are hidden thereby on Fig. 2 of the drawings. The supporting plate 20 is supported and strengthened throughout the central portion thereof where the cover is subjected to the frictional scraping contact with the rolls by means of vertical webs 69 which are bolted by means of bolts 70 to the trough for the coating material.

After the cover leaves the coating roll, it passes between vertically. extending guiding flanges 71 and '72 (see Fig. 1). The receiving end of these flanges are bent outwardly so as to insure-the cover passing therebetween. The flanges are preferably made integral with the slotted supporting plate '20. When the cover reaches the position indicated at C in Fig. 1, it is then cen-- trally'positioned over the conveyor 73 which is in the form of a sprocket chain having spaced fingers 74, 74: adapted to engage the can cover and move the same through the remaining portion of the machine. This sprocket chain 7 3 moves in a plane at right angles to the plane of the sprocket chain 3. Said sprocket chain runs over a sprocket wheel 75 carried by the shaft 12 and is driven thereby. The sprocket chain 3 tcrminates so that when the fingers 21, which are more or less curved on their outer ends, re lease the covers by the movement of the lingers downwardly following the path of travel of the sprocket chain, the cover is properly positioned for the conveyor 73 to take it up and move it in the opposite direction and the conveyor 73 is so timed that the fingers 74; pick up the cover at once and move it in a direction at right angles o its first path of travel so that the cover travels practically continuously through the machine. There is a guiding flange 76 which insures that the endwise movement of the cover after leaving the chain 3 will stop and be properly positioned on the conveying chain 73,'and this guiding flange, together with the flange 72, which also eX- tends around in a direction at right angles to its first location, guides the cover in its forward movement-to'the second pair of coatirg rolls indicated at 77 and 7 8. These rolls 77 and 7 8 are similar in all details of construction to the rolls 22 and 23, and they are similarly mounted, and therefore, only a brief reference to the rolls will be made.

Each roll is preferably provided with annular groove 7 9. The roll 77 is carried by a shaft 80 and the roll 7 8 is carried by a shaft 81. The shaft 80 is mounted in brackets 82, 82, while the shaft 81 is mounted in brackets 83, 83. These bracketsare'slotted so as to permit the shaftsto move hori v zontally and the coating rolls'back' and forth in a horizontal plane in the manner 'de'- scribed in connection with therolls 2 2 and,

23. Springs 84, and 85, 8 5 operate to yieldingly press the rolls toward the center of the machine. Underneatheach roll there is a trough 86 supported by means of a bolt- 87, each trough resting upon a lug 88 hav- 7 T4. Said slotted plate has downwardly turned flanges 90 along the'slot for strengthening the plate and also downwardly turned flanges or channel inembers91 which are bolted by means of bolts 92 to the troughs for the coating material, as above described in connection with the supporting flange 69; The coating roll 77 isdriv'en by a sprocket wheel 93 with which the sprocket chain 94' cooperates, and this sprocket chain runs over a sprocket wheel on the shaft 95 carrying the bevel gear 64. The coating roll 78 is driven by means of a sprocket chain 96 which cooperates with a sprocket wheel on the shaft 97. This shaft 97 carries a bevel gear 98 which meshes with a bevel gear 99 on the shaft 56. Associated with the coat ing rolls 77 and F8 are scrapers or doctors 100, which are similar in construction and similarly mounted, to the scrapers 49.

After the can cover reaches the position indicated at C, it then travels sidewiseinstead of endwise so that the ends are presented to the coating rolls T7 and 78., The rounded corners engage the rolls at the points a, a, which is substantially the mid dle point of the rounded corners, then the rolls separate so that the straight ends are coated and finally the remaining sections of the rear rounded corners engage the rear tapered ends of the rolls. These tapered ends at the receiving ends of therolls are i11 dicated at 101 and at the deliveryend at 102. While I have shown these rolls 77 and 78 as provided with annular grooves, it will be understood that these rolls may bemodified as to form and shaping in the manner stated.

above in connection with the coating rolls 22 and 23.

From the above it" will be apparent that I have provided a coating machine for a cover, for what'is known in the trade asan oblong box having rounded corners wherein the cover travels substantially continuously through the machine and wherein the coating is put on to the cover at the sides and end edges and also at therounded corners. by scraping as distinguished from squirting,

it on as ha's lieretofore been practiced, and

' also as distinguished from puttingthecoating on by a roller which travels along the eam bottom of the groove, another method of coating this type of can coverl J The coating 'material is, of course, in a very plastic condition, and substantially a fluid condition, and there is any's'light gap at the center of the rounded corners that does not contact with; the r0lls,. the material will readily flow to ,fill llp this gap. By scraping the material on to the cover,.it is obvious that any amount of ,material may be put on to the cover desired, the amount being regulated by the thickness of the film on the coating rolls, the length of the coating rolls and'the presence'or absence of annular chan: nels, thus increasing or decreasing as desired,the extent of'th'e coating surface. It is not thought that further description of and portions of the rounded corners are like wise coated. The cover then changes its path of travel and moves in a direction at right angles to the path of travel when the side edges are coated, and the end edges are presented to a pair of coating rolls where they are coated by scraping the material thereon and the remaining sections of tlleflOLlllClGtl corners are likewise coated by these rolls. The cover then passes out of the machine. Particular attention is called to the fact that the covers are continuously moving or substantially so, through the machine, which greatly increases the speed with which covers may be coated.

lVhile I have described my machine as operating' to coat a cover having straight edge portions and rounded corners, it will be understood, of course, that the same principles described above may be used for coating an oval cover, that is, a cover wherein the side and end edges instead of being straight, are curved.

It is'obvious that minor changes in the details of construction and the arrangement of the part smay be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I'cla'im as new and desire to secure by Letters Patent, is

l. A machine for coating with sealing material'can covers having straight edge portions and rounded'corner portions including in combination devices for engaging ,thes'traight and rounded edge portions of the cover in succession, and means for the device is necessary. It may be stated,

conveying the covers bodily between said devices whereby the sealing material is scraped from the devices on to the cover.

2. A machine for coating with sealing material can covers having straight edge portions and rounded corner portions including in combination devices for engaging the straight and rounded edge portions of the cover in succession, and means for conveying the cover horizontally with the face thereof to be coated uppermost between said devices whereby the sealing material is scraped from said devices on to said cover.

3. A machine for coating with sealing material can covers'having straight edge portions and rounded corner portions including in combination coating rolls spaced from each other and constructed andarranged so as to engage simultaneously the opposite straight and rounded corner portions of the cover, and means for conveying the cover between said rolls whereby the sealing material is scraped from the rolls on to the cover.

4:. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions, including in combination means for conveying the cover horizontally with the surface to be coated uppermost, coating rolls arranged in pairs and having their axes located substantially in the plane of travel of the cover, said coating rolls being shaped so'as to engage the straight and rounded edge portions of the cover whereby the sealing material is scraped from said rolls on to the cover.

5. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions, including in combination two pairs of coating rolls disposed with their axes at an angle to each other, conveying means for presenting the cover to the surface tobe coated uppermost, first, to one pair of rolls and then the other pair of rolls, whereby the sides, ends and rounded cornerportions are presented to said rolls and the sealing ma terial scraped by the cover from the rolls on to the cover.

6. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination two pairs of coating rolls arranged with their axes at right angles to each other, means for yieldingly mounting certain of said rolls, means for presenting the cover with its surface to be coated uppermost, first to one pair of rolls and then to the other, whereby the sides and part of the rounded end portions will be coated by one pair of rolls and the end and remaining rounded portions will be coated by the other pair of rolls.

7. A machine for coating with sealing scraped on to the side, ends and rounded corner portions of the cover from said rolls.

8. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination two pairs of coating rolls arranged with their axes at an angle, means for conveying the cover, first between one pair of rolls and then between the other pair of rolls, said cover traveling in a plane containing the axes of the rolls and with its face to be coated uppermost, means for rotating the rolls of each pair in opposite directions so that the material on the rolls will be scraped on to the surface of the cover to be coated, and means for supporting the rolls whereby they are yieldingly pressed against the edges of the cover.

9. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination two pairs of coating rolls arranged with their axes at an angle, means for conveying the cover, first between one pair of rolls and then between the other pair of rolls, said cover traveling in a plane containing the axes of the rolls and with its faceto be coated uppermost, means for rotating the rolls of each pair in opposite directions so that the material on the rolls will be scraped on to the surface of the cover to be coated, means for supporting the rolls whereby they are yieldingly pressed against the edges of the cover means for supplying each coating roll with a thin film of sealing material, and means whereby the thickness of the film may be regulated.

10. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination a coating roll, means for presenting a side edge and a portion of the rounded corners at the ends thereof to said roll, means whereby the roll is yieldingly pressed into engagement with the can cover, said cover traveling in a plane containing the axis of the roll, means for supplying said roll with coating material, and means whereby the thickness of the material on the coating roll may be regulated.

11. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination a coating roll, means coating roll having a material, can covers having straight edge portions and rounded corner portions including in combination a coating roll, a support for can covers extending lengthwise or the roll and disposed. in a plane substantially containing the axis of the roll, means for moving the cover along the support and longitudinally of the roll with its edge in contact with the roll, means for yieldingly pressing the cover into contact with the roll, means for rotating the roll, means for supplying the roll with a coating of sealing material, and means for regulating the thickness of the layer of sealing material on the coating roll, saidcoating roll having a series of annular grooves formed therein thus forming a series of separated and independent annular coating faces.

13. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination a coating roll, a support for can covers extending lengthwise of the roll and disposed in a plane substantially containing the axis of the roll, means for moving the cover along the support and longitudinally of the roll with its edge in contact with the roll, means for yieldingly pressing the cover into contact with the roll, means for rotating the roll, means for supplying the roll with a coating 0t sealing material, and means for regulating the thickness of the layer of sealing material on the coating roll, saidv roll being shaped longitudinally so as to engage first, a portion of one roundedcorner, then a side edge, and: then. a portion of the'other rounded corner.

14:. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination a pair ofsupporting rolls, a support located between the rolls and disposed in a plane containing the axes of the rolls, means for conveying the cover longitudinally of said rolls along said support, means for supporting said rolls whereby they are yieldingly pressed. toward the cover and held in contact therewith, said rolls being held separated by the cover, said rolls being longitudinally shaped whereby substantially halfof thelrounded corner pon tions at one end of the cover will engage the rolls first, then the straight side portions will engage the rolls, then substantially onehalf of the rounded corner portions at the other end of the cover will engage the rolls forscraping sealing material on to the cover,

means for rotating the rolls in opposite directions so as to scrape the material on to the upper face of the cover, and means for supplying the rolls with sealing material.

15. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination a pair of supporting rolls, a support located between the rolls and disposed in a plane containing the axes of the rolls, means for conveying the cover longitudinally of said rolls along said support, means for supporting said rolls whereby they are yieldingly pressed toward the cover and held in contact therewith, said rolls being held separated by the cover, said rolls being longitudinally shaped whereby substantially half of the rounded corner portions at one end of the cover will engage the rolls first, then the straight side portions will engage the rolls, then substantially onehalf of the rounded corner portions at the other end of the cover will engage the rolls for scraping sealing materialon to the cover, means for rotating the rolls in opposite directions so as to scrape the material on to the upper face of the cover, means for supplying the rolls with sealing material, a second pair of coating rolls shaped longitudinally and positioned so as to engage, first the remaining rounded .cornerportions at one side of the cover, then the end portions of the cover, then the remaining rounded portions at the other side of thecover for scraping sealing material on to the cover, means for yieldingly pressing said rolls into contact with said cover, means for rotating said second pair of rolls in opposite directions, and means for applying sealing material to said rolls. r

16. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination two pairs of coating rolls arranged with their axes at right angles to each other, supporting means along which the covers may slide disposed. substantially in a plane containing the axes of the rolls, means for conveying the cover longitudinally of" one pair of rolls, means t'or conveyi'ng they cover longitudinally of the other pair of rolls, means for yieldingly supportmg each roll: whereby they are pressed against the edge portions ofthe cover as it passestherebetween, each ofsaid rolls having acentral cylindrical portion and tapered end portions wherebythe rounded corner portions as well as the side and end portions will be coated with sealing material, means for supplying each roll with coating material, and means for regulating the thickness of the coating on the rolls.

17. A machine for coating with sealing material, can covers having straight edge portions and rounded corner portions including in combination two pairs of coating rolls arranged with their axes at right angles to each other, supporting means along which the covers may slide disposed substantially in a plane containing the axes of the rolls, means for conveying the cover longitudinally of one pair of rolls, means for conveying the cover longitudinally of the other pair of rolls, means for yieldingly sup-porting each roll whereby they are pressed against the edge portions of the cover as it passes therebetweemeach of said rolls having a central cylindrical portion and tapered end portions whereby the rounded corner portions as well as the side and end portions will be coated with sealing material, means for supplying each roll with coating material, and means for regulating the thickness of the coating on the rolls, each roll having a plurality of annular grooves formed therein thus forming spaced annular coating surfaces.

18. A machine for coating with sealing material, can covers including a coating roll, means for supporting said roll, means for rotating the roll, means for conveying the cover lengthwise of the rolls with its edge portion in contact with the roll, said roll having a series of annular grooves forming a series of spaced annular coating faces, means for supplying said roll with a coating of sealing material, and means for regulatingthe thickness of the coating.

19. A machine for coating with sealing material, can covers including in combination means for conveying the covers, and devices yieldingly movable toward and from each other and constructed and arranged so as to engage simultaneously opposite edge portions of the cover whereby the sealing material is scraped from said devices on to said cover.

In testimony whereof, I aflix my signa ture. i

THOMAS LUOIEN TALIAFERRO.

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