US1198976A - Machine for applying paraffin or the like to paper or other fabrics. - Google Patents

Description

E. H. VAVRA.

MACHINE FOR APPLYING PARAFFIN OR THE LIKE TO PAPER OR OTHER FABRICS.

' APPLICATION FILED MAR. 12. 1914.

4 SHEETS-SHEET 1.

1,198,976. PatentedSept. 19,1916.

/ ziyizzwwz E. H- VAVRA.

MACHINE FOR APPLYING PARAFFIN OR THE LIKETO PAPER OR OTHER FABRICS. I

APPLICATION FILED MAR l2, l9l4. 1,198,976, PatentedSept. 19, 1916.

Y 4 SHEETS-SHEET 2. x

E. H. VAVRA.

MACHINE FOR APPLYING PARAFFIN OR THE LIKE TO PAPER OR OTHER FABRICS.

APPLICATION FILED MAR. 12. 1914;

1,1 98,976 I Patented Sept: 19 1916.

4 SHEETSSHEET 3.

E. H. VAVRA.

MACHINE FOR APPLYING PARAFFIN OR THE LIKE TO PAPER OR OTHER FABRICS.

APPLICATION FILED MAR-12,1914- Patented Sept. 19, 1916.

4 SHEETS-SHEET 4 EMERICH H. VAVRA, OF CHICAGO, ILLINOIS.

MACHINE FOR APPLYING PARAFFIN OR THE LIKE PAPER OR OTHER FABRICS.

To all whom it may concern B it known that I, EMERICII H. VAvnA, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful lmproycments in Machines for Applying Paraffin or the like to Paper or other Fabrics, of which the following is a specification.

This invention relates to improvements in machines for applying paraffin or the like to paper or other fabric, but more specifically to machines for applying paraffin and the like to paper cartons. My inventionis, however, particularly directed to improvements in machines wherein heretofore the cartons have been submerged in heated paraffin, and thereafter exposed to a cooling liquid for producing a tough, elastic coating or investment, which promotes considerable flexure in the paper without breaking such coating, and not only renders the fiber of the carton impervious to moisture and incapable of being discolored or disintegrated by liquids, but adds to the attractiveness of the carton and the printed matter thereon.

The prime object of this inventionbroadly stated is to provide a means for securing the above described valuable results with the use of a minimum amount of parafiin or the like.

More specifically stated the object of my invention is to provide a means by which the squeeze rollers for the cartons may be utilized as a gage for determining the thickness of the material applied to the-cartons, in their passage from between said rollers.

A further object of my invention is to provide a means whereby the guide rollers directing the cartons to the squeeze rollers are moved by gravity. to operative engagement with and actuated by the submerging rolls, and whereby said guide rolls may be swung away from and above the submerging rolls for access to the latter.

Another object of my invention is to provide a means for suspending the submerging rolls from their drive shaft with which they are positively connected by a gear wheel mechanism whereby said rolls'may be submerged inand lifted from the contents of the machine, without disconnecting their driving gearing.

.-\"further object of my invention is to provide an adjustable suspending means for Specification of Letters Patent. Patented Sept 19, 191(} Application filed March 12, 1914. I

Serial No. 824,125.

the guide fingers between which the cartons ar directed from the supply to the feed rollers of the machine.

Another object of my invention is to pro vide for pivotally supporting one end of the carton magazine whereby said magazine may be bodily adjusted on the are of a circle, the axis of which is in a plane below and outwardly beyond the inner end of the machine.

A further object of my invention is to provide the magazine with a flexible roughened support projecting beyond the inner end thereof to a point beneath the carton supply roller and utilize the adjacent guiding fingers as a flexible support therefor.

ith these ends in view, my invention finds embodiment in certain features of novelty in the construction, combination 'and arrangement of parts by which the said objects and certain other objects ar attained, all as hereinafter fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In said drawings: Figure l is a side elevation of a machine embodying my invention, portions being broken away in order to expose underlying parts, Fig. 2 is a top plan view of the machine,'Fig. 3 is a section taken on substantially line vv of Fig. 2, Fig. 4 is a detail view of the mechanism for feeding the articles singly from the ma zine of the device, Fig. 5 is an enlarged detail section taken on substantially line ww of Fig. 2, Figs. 6 and 7 are enlarged detail sections taken on lines aca2 and y-y respectively of Fig. 2, and Fig. 8 is a fragmentary section illustrating .a slightly modified form of construction, the section being taken on substantially line 2-2 of Fig. 2.

The preferred form of construction as illustrated in the drawings comprises a supporting frame consisting of legs 1 and longitudinally extending frame members 2.

Arranged at one end of the tank 3 is a magazine in which the articles A to be treated are arranged by the operator preparatory to the passage of said articles through the machine. This magazine comprises an inclined platform 5 the inner end of which is supported by arms 6 upon a transversely extending rod 7 set screws 8 cooperating with the members 6 to-secure the same to said rod. The outer end of the platform 5 is adjustably supported by a longitudinally adjustable leg, not shown.

Arranged at the lower or discharge end of the platform 5 is a carton supply roller 9 fixed to a shaft 10. Said roller 9 is provided at its periphery with a coating of frictional material, preferably rubber, as shown.

Arranged centrally upon the upper side of platform 5 adjacent the roller 9 is a strip 11 of rubber or other suitable frictional material secured in position by means of a clamp 12 with which cooperates a thumb screw 13, as clearly shown in Fig. 3. The

lower end of strip 11 is normally pressed into contact with the periphery of roller 9 by means of a curved spring plate 14 supported upon cross bars 15 and 16, one end of said plate projecting from the bar 16 and taking over the adjacent edge of tank 3 in order to serve as a guide for the articles after the same pass the roller 9, as will be readily understood.

The articles A which it is desired to pass through the machine are arranged upon the platform 5 ininclined position, said articles being arranged one behind the other, the lower edge portion of the foremost thereof engaging against the periphery of roller 9. The arrangement is such that, upon rotation of said roller in a counter clockwise direction as viewed in Fig. 3, the articles A will be withdrawn singly from the magazine or platform 5, the frictional coating of roller 9 gripping the foremost article and advancing the same, the strip 11 serving to hold the other articles back so as to preven' more than one bein withdrawn at a tim Because of the inclination of the platform 5, the articles A will be fed toward the roller 9 by gravity. The respective ends of shaft 10 of roller 9 are mounted for vertical adjustment in the frame members 2, screws 18 C06 crating with said bearing blocks 17 to ad ust the same and hence the roller 9 vertically, thumb nuts 19 cooperating with said screws to lock the same in positions of adjustment. The shaft 10 is driven through the medium of a gear 20 which is loosely mounted thereon, operative connection between said gear and said shaft being effected through a shiftable clutch 21 splined to said shaft 10, as shown in Fig. 5. The clutch member 21 is provided at one side with clutch teeth which are adapted to interlock with clutch teeth provided upon the adjacent side of gear 20 and so that when said clutch teeth are interlockcrl. an operative connection will be established between the gear 20 and the shaft 10. Shifting of the clutch member 21 is effected by means of a shifting fork 22 which is fulcrumed at its lower end at 23, as shown in Fig. 4. Cooperating with said shifting fork is a helical compression spring 21 which serves to normally hold the clutch member 21 in operative relation with the gear 20, as will be readily understood. With this arrangement then, it will be seen that normally, assuming the gear 20 to be constantly driven, the shaft 10 will be constantly rotated and hence feeding of articles from the magazine constantly effected. Disconnection of shaft 10 from gear 20 and hence cessation of the feeding of articles A byroller 9, is secured through the medium of a lever 25.which is connected with the shifting fork 22 by a rod 26. The lower end of the lever 25 is adjustably fulcrumed at 27, the arrangement being such that, shifting of the clutch member 21 to disengaging position may be effected by tilting the upper end of lever 25 toward the machine or toward the right, as shown in Fig. 4. Pivotally mounted upon the upper end of lever 25 is a. detent 28 provided with a notch 29 which is adapted to embrace the adjacent edges of the supporting frame 2, when said lever is rocked to shift the clutch member 21 to disengaging position, said. detent 28 serving to releasably hold said lever in this position. In Fig. 1 this detent is shown in inoperative position, the lower end or handle of said detent, when the same is in use, being rocked outwardly and upwardly so as to rock the slotted portion of said detent inwardly and downwardly into engagement with the upper edge of the adjacent frame member 2.

Arranged {lbOXB the tank 3 adjacent the outlet end thereof is the driving shaft 30 of the machine which is mounted in suitable bearings provided in uprights 31 arising from the frame members 2. The shaft ,30 is provided with fixed and loose pulleys 32 and 33 respectively with which cooperates a driving belt 32, as well be readily understood. A suitable belt shifting mechanism 34 cooperates with the belt 32' for shifting said belt from one pulley to the other in starting and stopping the machine. The shaft 30 serves to support a bearing frame which consists of angular arms the u per end portions of which pivotally embrace said shaft, as clearly shown in the several views. Mounted in and extending between the lower ends of the arms 35 are cooperating rollers 36 and37 so arranged that their peripheries normally contact with each other. The roller 36 is mounted in adjustmeagre I ing contact of the periphery thereof with the periphery of roller 37.. Said rollers 36 and 37 are operatively connected by meshing gears 38 and 39 fixed respectively thereto, operative connection between the same and shaft 30 being effected through an idler gear 40 which meshes with the gear 39 and also with a pinion 41, fixed to said shaft. The free ends of arms 35 are adjustably supported in the tank 3 by means of laterally projecting fingers 42 secured tothe free 7 ends of said arms, at the outer ends of which are provided screws 43 threaded therein, the lower ends of said screws contacting with the upper edges ofv frame bars 2, as clearly shown in Fig. 2. With this arrangement, it will be seen, thatrpivotal adjustment of the arms 35 in order to efiect vertical adjust ment of the rollers 36 and 37 may be effected by simply rotating screws 43.

Arranged adjacent roller 36 is arpair of feeding rollers 44 and 45 fixed to shafts 46 and 47, the ends of which are mounted in bearings provided in supporting arms pivotally connected with the arms 35, each of said supporting arms being formed of two sections 48 and 48' which are pivotally connected. Provided at corresponding ends of the shafts 46 and 47 are meshing gears-49 and 50 respectively, the gear 50 being 'connected through the medium of an idler 51 with a gear 38 which is fixed to thecorresponding end of roller 36. With thisrarrangement it will be-seen that the gear 51 will be maintained in mesh with the gear-38 through gravity, the former resting in engagement with the latter simply through the weight supported by the arms 4848'. Also, the arrangement is such that if desired, the supporting arms 4848 may be rocked upwardly in order to carry the feed rollers 44 and 45 from' position in front of the roller 36. This is of particular advantage" for the reason that, in operation, the peripheries of rollers 36 ahd 37 are wrapped with strips of fabric or padding and by so mounting the feeding rollers 44 and 45 as to permit of the same being moved upwardly from proximity with the roller 37, access maybe readily gained to the latter for wrap-- ping or unwrapping the periphery. thereof. Similarly the arms 35 are so arranged that the free ends thereof may be rocked upwardly in order to carry rollers 37 and 38 and the parts co'c'vperating therewith upwardly out of the tank 3 in order to permit of ready access being gained to the interior of the latter for repairing the same or for any other reason. Said arms 35 are releasably locked in the last mentioned position by means of a detent 35' adapted, when said arms are thus positioned, to engage with a rod 35 which extends between and connects the upper 74, 74' and 75.

ends of said arms, as clearly shown in Figs. 1, 2 and 3.

The articlesA fed from the magazine by the roller 9 are guided to position between the feeding rollers 44 and .45 by means of spaced guiding fingers 52 and 56, each of the fingers 52 being secured to a head 53 which is adjustably secured by means of a set screw 54 to a transversely extending supporting bar 55. The fingers 56 are supported at corresponding ends upon a transversely extending bar 57 which is supported at its ends by fingers 58 which depend from the rod 55, the opposite ends of fingers 56 being loosely supported upon a rod 59 secured at its ends in the arms 55. The rod 59 also supports a curved plate 60 which serves when the machine is in use, to deflect the articles A upwardlyinto engagement between the rollers 36 and 37. The rod 59 is mounted for rotary adjustment in arms 35 in order to rock the plate 60 into proper position under the roller 37, set screws 61 codperating with rod 59 to frictionally hold the same and hence the plate 60 in positions of adjustment. A= finger 62 projecting upwardly from one end of the rod 59 serves as ahandle for adjusting such rod and hence the plate 60, as will be readily understood.

The articles A are guided from the rollers 36 and 37 by spaced fingers 63 which are secured by thumb screws 64 to a transversely extending bar 65 secured at its ends to the- 66 may be dispensed with and in lieu thereof a roller 67 employed which will be opera tively connected with the shaft 30 by means of an endless belt 68, as clearly shown in Fig. 8.

Upon entering the tank 4, the articles A will be engaged between coiiperating endless aprons constituted by spaced strings or cords 69 and 69,the cords 69 being trained around rollers 70, 71,72 and 73, and the springs or cords .69" being trained around rollers The rollers 71. 72, 74 and 74 are mounted in substantially U-shaped supporting frames 76 which extend into the tank 4 at the opposite sides thereof, being supported by laterally projecting lugs 77 which engage against the upper edges of the lateral walls of said tank, and which are clamped in position by bars 78 with which cotiperate screws or bolts 78. The rollers 73 and 75 are operatively connected by meshing gears 79 and 80 which are fixed respec tively to saidrollers. Also fixed to the roller 73 is agear 81 which meshes with a gear 82 fixed to a roller 83, as clearly shown in Figs.

'6 and 7. Coiiperating with the roller 83 is a second roller 84, the rollers 83 and 84 being arranged in superimposed relation and being adapted, when the machine is in operation, to serve in the capacity of a wringer, being adapted to remove any superfluous water clinging to the opposite sides of the articles A after their passage through the cooling bath contained in tank 4, a helical compression spring 86' coiiperating with theroller 84 in order to press the same into close con- I tact with the roller 83, as will be readily understood. Said rollers 83 and 84are opera-- tively connected by meshing gears 85 and 86 which are provided respectively upon said rollers, the roller 84 being provided also with a bevel gear 87 which meshes with a bevel gear 88 upon a shaft 89 through the medium of whichsaid rollers 83 and 84 and hence rollers '18 and 75 are rotated, the rotation of the last mentioned rollers resulting, of course, in the driving of cords 69 and 69. The shaft 89 is also provided with a bevel gear 90which meshes with a bevel gear 91 which is operatively connected through the medium of a gear 92 with the gear 20 which 'efi'ects rotation of the feeding roller 9, as

above described. To the shaft 89 is also fixed a bevel gear 93 which meshes with a bevel gear 94 provided upon one end of the driving shaft 80, thereby establishing an operative connection between the source of power and the shaft 89 and consequently the parts with which said shaft is operatively connected, as just described.

In the operation of the machine, the tank 3 is first supplied with parafiin or other like cles A conveyed through the tank between substancewith which it is desired to impregnate the articles A. In order to maintain the paraffin, where the latter is-used, in a liquid state, a burner 95 of conventional type is arranged under the tank 3 in order to heat the latter and hence the paraffin con-' the traveling cords 69 and 69'. A drain pipe 99 leads from the tank 4,- a constant circulation of cold water being maintained in the tank duringthe operation of the machine through the constant supply introduced through pipe 97 and the constant draining through pipe 99. A shield 100 is arranged over the forward end of the tank 3 above the guide fingers 52 in order to prevent spattering of the hot paraffin, when the machine is in operation. In the operation of the machine then, the articles A which it is desired to treat are arranged in the magazine upon the platform 5 in the manner illustrated in Fig. 3. Upon rotation of the roller 9, the articles A will be withdrawn singly as above described, and directed by said roller to position between the upper ends of guide rods 52 and the plate 14. The articles will slide downwardly to position between guide rods 56 and the lower, ends of'guide rods 52 into engagement between the rollers 44 and 45 which will direct the same onto the curved plate 60 whence the articles will be guided upwardly into engagement between the rollers 36 and 37. After passing between said rollers, the articles will pass between guide fingers 63and plates 66 or roller 67 which will direct thesame to position between the conveyer cords 69 and 69 contained in the tank 4. In the passage through the tank 3, the articles A will be immersed in the paraffin bath contained therein and immediately after being carried from said bath will be immersed in the cooling bath contained in the tank 4 into which bath said articles will be carried by the cords 69 and 69'. Said cords after carrying said articles through the cooling bath will deliver the same to position between the wringing roll ers 83a-nd 84 which will discharge the same into a suitable recept'acle provided therefor at the end of tank 4.

The rollers 36 and 87 provided in the tank 8 are supported with their lower end portions dipping into the parafiin bath, the level of the latter being slightly below the upper side of roller 37 but above the line of contact between said rollers. By thus positioning said rollers, the same will serve in the double capacity of means for pressing the parafiin into the opposite sides of the articles being treated in order to insure the proper impregnation thereof, and at the same time will serve as a gage to determine the thickness of the paraffin coating applied to the opposite sides of said articles. The latter function is served by said rollers by reason of the fact that with the arrangement described and with said rollers rotating so that the upper sides thereof recede or move from each other, the liquid paraflin, although the level thereof is above that of the points of contact of said rollers, will not be permitted to flow into the space between said rollers above the line of contact thereof because any parafiin flowing into said space at the ends of the rollers will adhere to and be carried away by the receding peripheries of said rollers, said roller peripheries moving faster than the parafiin is adapted to flow. In practice it has been found that the paraffin will flow into the space between said rollers about one inch at each end, the conmeagre the roller 36. Through the pivotal adjustment which is afforded the supporting arms 35, said rollers 36 and 37 may be vertically adjusted in order to secure the proper positioning thereof relative to the level of the paraffin bath contained in the tank 3. A

plurality of fingers 63 instead of the solid guiding plate is employed for contact with the articles after passage between the roll ers 36 and 37 so as to reduce the-disturbance of the paraffin coat upon-the articles to a minimum. This also is the reason for the employment of a plurality of cords 69 and 69 instead of solid aprons or belts in conveying the articles through the cooling bath.

\Vhile I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without. departing from the spirit of the invention. 1, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. A coating machine comprising in combination a pair of contacting rollers, one of which rollers has its upper sid located, in

a plane approximately that of the level of.

the coating material, and means for simultaneously rotating said rollers 1n .opposlte directions, whereby the coating material-is prevented from overflowing said rollers, and their surfaces above their point of contact is utilized to gage the thickness of the coating adhering to the articles passing from contact with the rollers.

2. A coating machine comprising in combination a pair of contacting rollers, one of which partly projects in a plane above, and

the upper surface of the other in a plane substantially the level of the coating mate rial, means for simultaneously rotating said rollers in opposite directions at a speed preventing. the coating material from flowing between said rollers above their point of contact.

.to the coated article their point of contact.

4, A coating machine comprising in combination a pair of contacting rollers one of which projects out of and above the level of the coating material, the other being located in a plane just below said level, means for simultaneously rotating said rollers in 0pposite directions at a speed preventing the coating material from entering between said rollers above their point of contact, whereby the capillary attraction of the surfaces of the rollers are utilized for. reducing the thickness of the material adhering passing from between said rollers.

5. A coating machine comprising in combination a pair. of contacting rollers, one of .which projects out of and above the level of the coating material, the other of-which rollers projects in a plane approximately the level of said material, means for simultaneously rotating said rollers in opposite directions, whereby the coating material adhering to the rollers above their point of contact is discharged into the body of the coating material at the surface thereof.

6. A coating machine comprising in combination a pair of contacting rollers, a drive, shaft therefor, a positive gear connection between said rollers and shaft, feed rollers for directing the articles to be coatedthrough the coating material to said contacting rollers, a positive gear connection between thefeed rollers and the contacting rollers, and means whereby the feed rollers are maintained by gravity in operative connection with the contacting rollers, whereby the feed rollers automatically ad.- just themselves to the adjustable position of the contacting rollers.

7. A coating machine comprising in combination a pair of contacting rollers, feed rollers therefor, a power shaft, a positive gear connection between said feed rollers, contacting rollers and shaft, and a suspend ing means for the feed rollers for maintaining them inoperative connection with the drive shaft by gravity, and whereby said feed rollers may beswung free and clear of the contacting rollers for convenient access to the-latter.

8. A coating machine comprising in combination a drive shaft, a swinging frame pivotally suspended from. said shaft, contacting rollers journaled in said frame, feed rollers, a positive gear connection between the contacting rollers with the feed rollers and the drive shaft, and a pivotal support for and suspendingthe feed rollers from said frame.

9. A coating machine comprising in combination a pair of contacting rollers arranged to spread and gage the thickness of the coating. material applied to articles ed through said tank so as to immerse the same in the liquid bath contained in said tank, said means comprising a pair of contacting rollers; guiding means leading to and from said rollers, said guiding means leading to said rollers comprising a pair of feeding rollers; pivoted supporting arms carrying said feeding rollers at their free ends; and an operative connection between said two sets of rollers permitting'said feeding rollers to be moved upwardly to inoper'ative position by upward rocking of said supporting arms, substantially as described.

11. A machine of the class described comprising a tank for paraiiin or the like; means for conveying the articles to be treated through said tank so as to immerse the same. in the liquid bath contained in said tank, said means comprising a pair of contacting rollers; guiding means'leading to and from said rollers, said guiding means leading to said rollers comprising a pair of feeding rollers; pivoted supporting arms carrying said feeding rollers at their free ends; and an operative connection between said two sets of rollers, said connection comprising gears on said rollers releasably iaeaeve maintained in mesh through the weightof said feeding rollers and the supporting arms therein whereby said feeding rollers may be moved upwardly to inoperative position by upward rocking of said supporting arms, substantially as described.

12. A machine of the class described com prising a tank for paraffin or the like; means for conveying the articles to be treated through said tank so as to immerse the same in the liquid bath contained in said tank, said means comprising a driving shaft mounted above said tank; arms supported by and depending from said shaft; rollers mounted in bearings provided in said arms; and a gear connectionbetween said shaft and said rollers, substantially as described.

13. A machine of the class described comprising a tank for parafiin or the like; means for conveying the articles to be treated from one side of said tank, immersing the same in the liquid bath contained in said tank, and discharging said articles at the other side of said tank, said means comprising a driving shaft mounted above said tank; arms pivotally supported by and depending from' said shaft; rollers mounted in bearings provided in said arms, said arms'being adapted to be rocked to elevate said rollers in said tank; and a gear connection between said shaft and said rollers, substantially as described.

in testimonv whereof l have signed my name to this specification in the presence of two subscribing witnesses.

EMERICH H. VAVRA.

Witnesses:

JosHUA ll. l-l. Porrs, HELEN F. LILLIS.

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