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Publication numberUS2512651 A
Publication typeGrant
Publication dateJun 27, 1950
Filing dateOct 31, 1945
Priority dateOct 31, 1945
Publication numberUS 2512651 A, US 2512651A, US-A-2512651, US2512651 A, US2512651A
InventorsSamuel S Jacobs
Original AssigneeAmerican Can Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Container treating machine
US 2512651 A
Abstract  available in
Images(5)
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Claims  available in
Description  (OCR text may contain errors)

June 27, 1950 s. s. JACOBS CONTAINER TREATING MACHINE 5 Sheets-Sheet 1 Filed Oct. 31. 1945 )/TOR. WWW

M v a 4f ATTORNEYS June 27, 1950 Q s. s. JACOBS 2,512,551

CONTAINER TREATING MACHINE File d Oct. 51, 1945 s Sheets-Sheet 5 IN VEN TOR.

M WM izm w ATTO EN F (S June 27, 1950 s. s. JACOBS CONTAINER TREATING MACHINE 5 Sheets-Sheet 4 Filed Oct. 51, 1945 June 27, 1950 s. s. JACOBS 2,512,651

CONTAINER TREATING MACHINE Filed Oct. 31, 1945 5 Sheets-Sheet 5 ATTO RN 595 Patented June 27, 1950 UNITED STATES PATENT OFFICE CONTAINER TREATING MACHINE Samuel S. Jacobs, San Mateo, Calif., assignor to American Can Company, New York, N. Y., a

corporation of New Jersey Application October 31, 1945, Serial No. 625,861

9 Claims. (Cl. 91-44) This invention relates to container treating taken in connection with the accompanying machines and the like and has particular referdrawings, discloses a preferred embodiment ence to applying different coating materials to thereof the interior and to the exterior surfaces of con- Referring to the drawings: tainers and to draining the excess coating mate- 5 Figure l is a sectional top plan view of a conrials separately from the interior and exterior tainer treatin machine embodying the present surfaces without mixing them. invention with parts broken away;

The present invention contemplates a treat- Fig. 2 is a sectional view of the machine shown ing machine wherein diiierent coating materials in Fig. 1 as taken along the line 2--2 in that are applied to the interior and to the exterior l figure; surfaces of containers without mixing the coat- Fig. 3 is a view similar to Fig. 2 taken subing materials during or following their applicastantially along the line 3-3 in Fig. 1: tion to the containers. Fig. 4 is a fragmentary plan, sectional view An object of the invention is the provision of taken substantially along a plane indicated by a container treating machine wherein diiferent 1 the section line 4-4 in Fig. 3; coating materials are applied to the interior and Fig. 5 is a top plan view of a gear layout, the to the exterior surfaces of fibre and other conview being taken substantially along the broken tainers at high speed and without mixing the lines 5-5 in Fig. 3 and showing certain shafts different coating materials and includes drainin section; ing the surplus thereof from the container walls Fig. 6 is a fragmentary vertical section taken in such a manner as to permit separate collecsubstantially along the line 6-6 in Fig. 1, with tion of the drainings for re-use on other conparts shown in full; and Y tainers. Figs. 7 and 8 are fragmentary sectional de- Another object of the invention is the provitails as taken substantially along the lines |I, sion, in such a machine for simultaneously ap- 8-8 in Fig. 2. plying different coating materials onto the in- As a, preferred embodiment of the present interior and exterior surfaces of a container havvention the drawings illustrate a machine for ing an opening in a wall thereo of a drain noztreating containers A each having an opening in zle insertable into the conta er opening for one end thereof. While the instant machine closing the opening where it surrounds the outmay be used for both metal and fibre receptacles side of the nozzle while draining the surplus it is particularly adapted for fibre containers decoating material from the interior of the consigned especially for packing milk and similar tainer as it is being applied by a spray nozzle dairy products. The container shown by way of operable within the drain nozzle. example in connection with such a machine is Another object of the invention is the providisclosed fully in the United States Patent sion in a machine of the character described, of 2,085,979, issued July 6, 1937, to John M. Hotheran exterior flow nozzle having elongated opensall. ings through which a film of coating material is In the manufacture of such fibre containers it flowed onto the exterior surfaces of containers, is necessary that they are thoroughly coated the containers at the same time being coated on with paraflin or other wax-like substance to their interior surfaces by way of an interior make them both liquid proof and sterile. In. nozzle, the machine also having a novel drain many instances it is desirable that a diflerent for collecting the different exterior and interior form of wax or other type of-coating material be coating materials to discharge the same to sepused for the exterior surface than that which is arate reservoirs thus avoiding mixing of the difused for the interior surface. ferent coating materials. v The empty container A is adapted to have its A further object of the invention is the provihinged plug cover, designated by the letter B. sion in such a. machine of separate supply sysswung back to uncover a filling and dispensing tems for the difierent coating materials includopening C (Fig. 2). These containers A are fed ing interior and exterior drains for collecting individually into the present machine with their and reconditioning for re-use the different coatopened ends down (see also Fig. 1). It is through ing t n this opening that the interior of the container is Numerous other objects and advantages of the coated. Opening C also serves in the present mainvention will be apparent as it is better underchine as a means for positioning the container stood from the following description, which,

on a rotatable carrier by which it is advanced 3 along a circular path of travel through the machine.

The container carrier is provided with a plurality of vertically disposed and spaced drain nozzles each of which is insertable within the opening of a container. This acts to pilot the container over an interior rotatable spray nozzle which is operable within each drain nozzle.

When such a container is in position on the carrier and over an interior spray nozzle, it is advanced by the carrier through a coating station wherein both the interior and exterior surfaces of the container are coated with different coating materials. The excess coating materials of these containers thereafter are drained off separately without mixing while the containers are advancing further through the machine. The coated containers then are discharged from the machine and are transferred to any suitable place of deposit.

Referring now to Fig. 1 of the drawings, individual containers A are herein shown with their open ends down as they are being fed into the instant machine along a chute ll. Such a chute has side guides i2 which guide the containers onto a stationary feed table i3 and into turret pockets [4 of a rotatable turret i5. There are preferably five such pockets.

Turret I5 is mounted on the upper end of a vertical shaft i6 journaled in hearings in a housing i1, carried on a machine main frame l8. Shaft I6 is rotated in any suitable manner in time with other parts of the machine and which for the purpose of the invention need not be shown.

The individual containers are held in each of the turret pockets i4 by a concentric guide 2i which terminates in a straight guide section 22 at its inner end. This directs the containers into the path of travel of a rotatable container carrier 23. The table l3 and the guide 2| extend into an opening 24 in the housing 11.

The rotatable carrier 23 is a circular member and has a main central bearing 25 formed in a hub 26 (Figs. 2 and 3). Bearing 25 surrounds and thus rotates with the carrier on a stationary vertical shaft 21 (see also Fig. 1). Shaft 21 is mounted at its lower end in the main frame It and at its upper end in a housing cover 23. Cover 28 is secured to the top of housing i'i.

Carrier 23 has an annular raised section 32 formed on its upper sloping surface 33. It is within this raised section that there are located a plurality of interior spraying devices 34 each including a spray nozzle 65, and a plurality of associated interior draining devices 35 each including a drain nozzle 5 i The rotatable carrier 23 is driven from a main machine drive shaft 36 by suitable gearing. Drive shaft 35 is journaled in a bearing 31 in the machine frame i8 (Fig. 2). A bevel gear 33 mounted on the inner end of shaft 36 meshes with and drives a bevel gear 42 mounted on the lower end of a vertical shaft 43. A drive: gear 44 mounted on the upper end of shaft 43 meshes with and drives a gear 45 secured to the hub 26 of the rotatable carrier. Shaft 43 is journaled in suitable hearings in the machine frame I 8.

As a container A is transferred from a turret pocket i4 onto the rotatable carrier 23 as in position D (Fig. 1) it comes directly over a drain nozzle 5i of one of the draining devices 35. This device is in its lowered position (Fig. 3). Intermediate each drain device there is interposed a feed element 52. The feed element just back of the draining device at position D engages the adjacent side wall of the container A, the pouring and dispensing opening 0 being nearest one of the corners of the engaged wall. Thus the opening of the container under consideration is at the rear and to the outside relative to the path of travel of the carrier. Devices 35 used for draining excess interior coating material from the containers will be described fully hereinafter.

The feed elements 52 are vertically disposed (see also Figs. 2 and 3) and each is formed by a reversely bent rod or hollow tube, one end being fastened to a mounting 53 which is secured to the upper face of the raised carrier section 32. This produces a double feed rod eflect for the reception of the containers as they come onto the carrier and for their ejection.

The containers A are guided along their circular path of travel while in their inverted positions on their respective drain nozzles. For this purpose upper and lower inside guide rails 54, 55 and upper and lower outside guide rails 56. 51 are provided (Figs. 1, 2, 3 and 4). The upper inside and the upper outside guide rails 54, 56 are bent slightly from true circular form to impart an outward tilt to the upper edge of each container as it approaches and passes through an interior, exterior coating station E. The lower inside and outside guide rails 55, 51 are cut away at the coating station E so as not to interfere with the coating action. This is evident in Fig. 2.

As a container A moves from station D toward the coating station E, the interior spraying nozzle and the associated drain nozzle 5| move up for insertion into the container. This may have a tendency to lift the moving containers but in order to prevent such lifting, a top guide rail 53 is provided. This rail extends over that portion of the path of travel of the container passing through the coating station E.

The lower inside and outside guide rails 55, 51-

are secured as by welding to the upper inside and outside guide rails 54, 56 by vertical tubes 62. These tubes extend up and are suspended from an upper plate 63. In like manner the top guide rail 53 also is suspended by tubes 62 from,

theplate 63. This upper plate is supported on a ledge 64 in the housing I] and is clamped in place by the housing cover 28.

In the initial upward movements, the spraying device rises with its associate draining device but the drain nozzle stops as soon as it is fully inserted into the opening C of the container. In inserted position the nozzle closes this opening. An interior spray nozzle 65 is a vital part of each spraying device and this nozzle continues its upward movement up through the now non-rising drain nozzle. Movement into the container continues until the spraying position is reached. This is illustrated in Fig. 2 of the drawing.

Each drain nozzle 5| is formed at the upper end and as an integral part of a slide 66 (Fig. 3)

Such a slide is movable in 9, slideway 61 vertically disposed in the carrier 23. Each slide 65 is carried on and is actuated from its lower end by a 8 draining device is raised and lowered in proper time with other moving parts of the machine for a spraying and draining operation.

Each of the drain nozzles 5| is tapered at its upper end for easy entry into a container opening (Figs. 2 and 3). This upper end al-o is castellated in the terminal region of a plurality of vertically fluted or slotted channels 11 which extend down on the inside of the drain nozzle. These slotted channels lead to an annular drainage groove 18 which surrounds the centrally disposed interior spray nozzle 85.

The interior of the slide 86 is bored or otherwise formed to provide a housing for a slidable and rotatable sleeve 82 of the spraying device 34. This sleeve is carried in a suitable bearing 83 at its lower end which is supported in a spraying device holder 84. Sleeve 82 is cam actuated to effect the up and down movement of the interior spray nozzle 85. For this purpose the holder 84 carries a cam roller 85 which is rotatably mounted on a pin 88. Cam roller 85 is operable in a cam raceway or groove 81 also formed in the peripheral wall of the cylinder I5 below the cam raceway 14. These two raceways I4, 81 thus provide the double cam feature.

The interior spray nozzle 85 (Fig. 2) is a long tube-like member closed at top and bottom and is located within the sleeve 82. Nozzle 85 constantly rotates and slides near its upper end in a bearing 88 of the sleeve. At its lower end the nozzle rotates in a bearing 92 carried in the holder 84. Such a nozzle has a plurality of inlet openings 93 near its lower end which lead to a central longitudinal channel or bore 94, extending up through the nozzle and communicating at the top with a plurality of small spray openings 95. It is through these latter openings that the interior coating material is forced for a spraying operation. This will be described fully hereinafter.

The interior spray nozzle 65 and also its associated sleeve 82 rotate and during a spraying operation the coating material is distributed uniformly throughout the interior of each container (Fig. 2). To effect this rotation in all positions each of the spraying devices 34 carries a pinion 98 (see also Figs. 3 and 8). The pinion 96 is keyed to the sleeve 82 of each spraying device just above the holder 84. Each pinion 96 is in engagement with gear teeth 91 formed on the cylindrical wall between the two raceways I4, 81. This effects the proper rotation of the nozzles 65 irrespective of the vertical nozzle position.

Each spraying device holder 84 is connected to the carrier 23 by inner and outer telescoping tubes I02, I03 in which a coating liquid ascends and which may be called ascending tubes and byinner and outer telescoping tubes I04, I05 for a descending liquid and which will be called descending tubes. It will be understood that there are as many sets of tubes as there are spraying devices 34.

The inner and lower ascending tube I02 is secured at its lower end to the holder 84 and is slidable in the outer and upper ascending tube I03. Tube I03 is secured at its upper end in the walls of a vertical section of a discharge passageway I06 formed in the carrier 23. Likewise, the lower end of the inner and lower descending tube I04 is securedto the holder 84 and its upper end is slidable in the outer and upper descending tube I05. The upper end of the outer descending tube I05 is secured to the walls of a supply passageway I81 formed in the carrier. Both the outer tubes I08, I05 pass through suitable clearance openings in the yoke 88 which slide up and down along these tubes.

Coating material for the interior spraying by way of the interior spray nozzles 65 is delivered under pressure into the present machine from any suitable supply source as at F, Fig. 2. Such material may be heated or otherwise prepared before being delivered to an inlet pipe I08. Pipe I08 is secured in a supply manifold II2 which is located below the bearing 25. Manifold H2 is engageable against the-bottom surface of the gear 45 and is pressed yieldingly against this gear by springs I I4.

The manifold II2 has a receiving chamber II5 into which the coating material passes from the pipe I08. Manifold II2 also has an elongated discharge opening I I8 (Figs. 2 and 7) which communicates successively with ports III extending verthially through the gear 45, discharge opening I15 being of sufllcient length to register with three adjacent ports H1 at any given time. This enables suflicient time for spraying the interior of each container and also for the spraying of a plurality of containers simultaneously while movway II8 disposed in the carrier hub 26. Each passageway H8 is connected to an associated passageway I01 by a radial channel I22 formed in the carrier 23. In this way coating material is delivered to each respective interior spraying device34. In passageway*I'0| the coating material is 'forced down the descending telescopic tubes I05, I04 into an opening I23 in the holder 84, thence through inlet openings 93 and up the central opening or bore 94 in the spray nozzle 65 for discharge through the spray nozzle openings 95 of the rotatable spray nozzle. It is from these openings that'a fine spray of coating material is directed against the entire interior walls of the container.

During this spraying operation the container A is tilted to one side as here'inbefore mentioned and as best illustrated in Fig. 2. This allows the excess coating material flowing down the side walls of the container to gather and to flow toward the opening C in the end wall of the container. Such excessive coating material then flows through the slotted channels 11 for discharge from the container, down through the annular drainage groove 18 surrounding the spray nozzle and into an outlet opening I24.

This excess or used coating material then collects in the ascending tubes I02, I03 and gradually flows up through the discharge passageway I08 and out through an associated overflow bore I25 which may be drilled in from the bottom of the hub 28. Liquid discharging from the bore I25 falls into a sump chamber G. Such a chamber is formed at the inside by a raised central section I 25 of the main frame and at the outside by the surrounding cylindrical wall 15. An out let pipe I2! is connected to the bottom of the sump chamber G (Fig. 2) by means of which the used or excess interior coating material may be conveyed to a convenient place of storage. Such material thereafter may be reconditioned by suitable treatment for subsequent re-use on other containers.

The outer or exterior surfaces of the containers A are treated with a suitable exterior coating material while the containers are passing through the coating station E. Such a coating 7 is applied by a stationary outside coating device I32 disposed on opposite sides of the path of travel of the containers. Such a device includes preferably a number of outer and inner nozzles I33, I34. Three sets of the nozzles are illustrated.

. there being three outer nozzles and three inner by a plurality of bolts I42 which pass through spacer tubes I43. This construction holds the manifold I31 in a desired position.

Each of the outer nozzles I 33 has two radially disposed longitudinally extending slits I44 out along the inner face of the tubular structure and these slits extend substantially the full length of the nozzle. The two slits of each nozzle arenot parallel with each other but preferably are anguarly disposed for directing two thin films of coating material in slightly different directions but generally in the path of the approaching containers coming into the station E.

In like manner each inner nozzle I34 has a pair of radially disposed longitudinally extending slits I cut in the outer face of the tubular nozzle, these slits extending substantially the full length of the nozzle. Owing to the angular disposition of the slits I45 two thin films of coating material are projected outwardly and into the path of the moving containers.

Supply manifolds I35, I31 (Figs. 1 and 2) have a plurality of slits I45, I41 cut in their opposed faces and just beneath the nozzles I33, I 34. These slits cooperate with the nozzle slits for directing a plurality of thin films of coating material against the inverted top ends of the advancing containers. The nozzle slits I44, I45 extend above the inverted bottom of the container sufficiently to direct the coating liquid on the bottom. Thus as each container passes through station E its entire exterior surface is flowed over with the coating material.

The coating material for the exterior of the containers is supplied to the manifolds I35, I31 and to the nozzles I33, I34 from any convenient source. This material like the coating material for the inside of the container may be treated before being applied to the container walls. The exterior coating material is delivered to the instant machine under pressure into an inlet pipe I52 shown atJ (Figs. 1, 2 and 6).

Pipe I52 is connected by a cross pipe I53 to a pair of angularly disposed pipes I54, I55. These latter pipes are threaded respectively into the manifolds I35, I31. This provides the inlet supply for the manifolds by means of which the nozzles I33, I34 are provided with a full supply of the coating material for the exterior surfaces of the container.

Provision also is made to collect the excess or overflow of the exterior coating material as it drains off of the containers in a manner to keep it separated from the interior coating material. During the drainage period, the exterior coating material flows down around the outside of the.

drain nozzles 5i and over the top of the sloping carrier surface 33. A plurality of openings I51 8 the section 32, one between adjacent interior spraying device 34 and draining device 33 units, and this enables the exterior coating material to flow outwardly and down over the outer periphery of the carrier 23 into an outer sump chamber K.

The sump chamber K (Figs. 2 and 3) is formed in the main frame and is contained within an outer wall I53 of the latter frame and in an inner cylindrical wall I32. Wall I32 is secured at its upper end to the carrier 23 and rotates therewith. The main frame I3 is cut away as at I33 to form a clearance for the wall I32 which is movable. A lateral outlet port I34 is provided at the bottom of the sump chamber K through which the drained outer coating material may be discharged as desired. Thus this material like the interior coating material hereinbefore mentioned may be reconditioned for re-use on other containers.

Following the coating operations at station E, the coated containers continuing uninterrupted along their circular path of travel, are moved back into a vertical plane. This movement is obtained by means of the upper inside and upper outside guide rails 54, 53 which gradually curve inwardly for this purpose (Figs. 1 and 3). Drainage of coating from both interior and exterior surfaces of the containers continues during this time.

Shortly after the containers leave the coating station E, the interior spray nozzles 35 of each spraying device move down out of the container until such a nozzle is wholly within its drain nozzle II. This latter nozzle, however, remains in the opening C of the moving container until it approaches the discharge station L (Figs. 1 and 4) Upon reaching this latter station the drain nozzles 5i move down below the inverted top of the containers. At about this time each coated container passes onto a horizontal arcuate platform I35. This platform supports the containers for further advance onto and through the station L and for discharge from the machine. Platform I55 is carried at the lower ends of the tubes 32 by bolts or other suitable means (Fig. 3).

As a container A reaches station L, it moves into one of five pockets I36 of a discharge starwheel I51. Theedge wall of the pocket I56 engages a side wall of the container and gradually shifts it outwardly from its circular path of travel transferring it into a pocket I33 of a discharge turret or wheel I12. This turret also has five pockets.

The starwheel I31 is mounted on the lower end of a vertical shaft I13 which is journaled in a bearing I14 depending from the upper plate 83 (Figs. 3 and 4). Shaft I13 is rotated by a gear I 15 which is mounted at the upper end of the shaft. Gear I15 is driven in time with other moving parts of the machine by suitable gearing connecting with a drivegear I13 (see also Fig. 5).

Drive gear I13 is mounted on the upper end of a sleeve shaft I11 which surrounds and which rotates on the stationary shaft 21. The sleeve shaft I11 is secured at its lower end to the carrier 23 and thus is rotated therewith. Drive gear I13 meshes with and drives an intermediate gear I13 which is rotated on a stub shaft I32 secured in the upper plate 33. The intermediate gear I13 also meshes with and drives the gear I15.

The discharge turret I12 (Figs. 3, 4 and 5) is mounted on a vertical shaft I33 which is journaled in suitable bearings I34 in the housing I1. This discharge turret operates in an opening I35 in the wall of the housing. The shaft I33 is ro-- tated from its upper end by a gear I33. Gear (Figs. 2 and 4) cut at spaced intervals through 1| I33 meshes with and is driven by an idler gear Ill which also meshes with and is driven from the intermediate gear I'll. The idler gear I" is rotatable on a stub shaft I88 which is secured in the upper plate IS.

The pockets I68 of the starwheel It! and the pockets I68 of the discharge turret I'll are timed relative to each other for transfer of individual containers from the former to the latter. This is incident to discharging containers from the machine. The terminal ends of upper and lower inside and outside guide rails 54, 55, 58 and 51 also are appropriately bent (Fig. 4) for assisting in an easy transfer of the containers into the turret pockets I68. The feed rods I52 cooperate with the bent ends of the guide rails during such transfer.

. During the transfer, the containers A move onto an inner curved track end section I82 and an outer concentric track section I 93 of the platform I65 (Figs. 1 and 4). These track sections of the platform may form part of the conventional can chute along which the coated containers A may pass. Obviously the coated containers may be transferred to an adjacent machine as for drying of the applied coating. The containers are properly directed to traverse the concentric sections I92, I93 by an inner concentric guide rail I94 and an outer concentric guide rail I95. These, guide rails are or may be secured to the respective sections I92, I93 as required.

It is thought that the invention and many of its attendant-advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope'of the invention or sacrificing all of its material advantages, the form herebefore described being merely a preferred embodiment thereof.

I claim:

1. In a treating machine for simultaneously applying different coating materials onto the interior and exterior surfaces of a container having an opening in a wall thereof, a carrier for advancing containers along a path of travel. a drain nozzle movably mounted on said carrier and insortable within the container opening for closing off the same and for conducting excess interior coating material away from the container, a rotatable spray nozzle movable within said drain nozzle for insertion into the container for spraying a coating material onto the interior container surface, a stationary exterior flow nozzle having radially disposed elongated orifices disposed adjacent the path of travel of the container for flowing a different kind of coating material on the exterior surface of the container as the latter is advanced by said carrier, and an outside drain for removal of excess coating material from the exterior surface of the container.

2. In a treating machine for simultaneously applying different coating materials onto the interior and exterior surfaces of containers each having an opening in a wall thereof, a rotatable carrier for advancing containers along a circular path of travel, a plurality of drain nozzles mounted on said carrier each having reciprocation for insertion within a container opening for closing off the same, a rotatable spray nozzle within each drain nozzle and having reciprocable movement therein to enter into a container for spraying a coating material onto the interior container surface, valve means for controlling the supply of said coating material to each of said inside spray nozzles, each drain nozzle having a drain outlet for the removal of excess coating material from its associated container, a plurality of stationary exterior'flow nozzles disposed inside and outside of the circular path of travel of the containers for depositing a different kind of coating material on the exterior surfaces of the containers as the latter advance with said carrier, and an outside drain for removal of excess coating material from the exterior surfaces of the containers whereby the said interior and exterior coating materials are kept separated.

3. In a machine for treating empty fibre containers for subsequent packaging of milk and the like by simultaneously applying different coating materials onto the interior and exterior surfaces of the containers each having a filling and dispensing opening, the combination of a rotatable carrier for advancing the containers along a circular path of travel, a plurality of drain nomles mounted on said carrier each .being insertable within a container opening for closing off the same, a plurality of rotatable spray nozzles each being movable with and relative to a said drain nozzle for entrance into the container for spraying a coating material onto the interior container surface, means for reciprocating and for rotating said spray nozzles in time with the insertion of said drain nozzles into the container opening, an inside drainage system having a drain outlet in each of said drain nozzles for removal of excess coating material from the interior of thecontainer, a plurality of inner and outer stationary exterior nozzles disposed on opposite sides of the path of travel of the containers for depositing a different kind of coating material onto the exterior surfaces of the containers as the latter are advanced along said circular path, and an outside drainage system for removal of excess coating material from the exterior surfaces of the containers.

4. In a machine for treating empty fibre containers for subsequent packaging of milk and the like by simultaneously applying different coat ing materials onto the interior and exterior surfaces of the containers each having a filling and dispensing opening in a wall thereof, the combination of a closed housing a rotatable carrier in said housing for advancing containers along a circular path of travel, means for rotating said carrier, a plurality of drain nozzles movably mounted on said carrier for insertion within the container opening for closing ofl'the same, a plurality of rotatable spray nozzles each being movable with and relative to a said drain nozzle for entrance into the container for spraying one kind of coating material onto the interior container surface, means for rotating said spray nozzles,

means for reciprocating said spray nozzles in time with the insertion of said drain nozzles into advancing containers, each drain nozzle having a drain outlet for the removal of excess coating material from each of the containers, a plurality of stationary exterior flow nozzles disposed adjacent the path of travel of the containers and on opposite sides thereof for flowing'a different kind of coating material on the exterior surfaces of the containers as the latter are advanced along their circular path of travel, and an outsid drain for removal of excess coating material from the exterior surfaces of the containers whereby the said coating materials are kept separate for reconditioning and for re-use in coating the interior and exterior surfaces of other containers.

5. In a treating machine for applying coating materials onto the interior and exterior surfaces of a container, a drain nozzle insertable within 11 an opening of the container for closing of! the same and for conducting excess interior coating material away from the container, a spray nozzle located within said drain nozzle for applying tainer opening, and an outside drain for removing the excess of said outside coating material from the exterior surface of the container to prevent mixing of said drained coating materials.

6. In a treating machine for applying coating materials onto the interior and exterior surfaces of containers having an opening, a reciprocable drain nozzle insertable within the container for closing of! the same and for conducting excess interior coating material away from the container, a rotatable spray nozzle movable within and relative to said drain nozzle to project into the container for applying a coating material onto the interior container surface. a stationary manifold disposed adjacent the outside of the container, said manifold being slit at intervals to form spaced elongated orifices directed toward the container for applying a separate coating material onto the exterior surface of the container as the latter is moved relative to said exterior nozzle, means for moving said drain nozzle and said spray nozzle relative to one another and to said container, and an outside drain for removal of excess coating material from the exterior surface of the container to prevent mixing of said drained coating materials.

7. In a treating machine for applying coating materials onto the interior and exterior surfaces of containers each having an opening, a drain nozzle insertable within the containeropening for closing 01! the same, and for conducting excess interior coating material away from the container, a spray nozzle movable within and relative to said drain nozzle to project into the container opening for spraying a coating material onto the interior container surface, a manifold disposed adjacent the outside of the container, said manifold being slit at intervals to form spaced elongated oriilces directed toward the container for depositing a separate coating material onto the exterior surface of the container as the latter is moved relative thereto, means for moving said drain nozzle and said spray nozzle relative to one another and to said container opening, an outside drain for the removal of excess coating material from the exterior surface of the container, and separate means connectd to said inside drain nozzle and to said outside drain for respectively receiving said container interior and exterior coating materials and for delivering the respective materials to said spray nozzle and manifold.

8. In a treating machine for applying coating materials onto the interior and exterior surfaces of containers having an opening therein, a drain male insertable within the container opening for closing on the same and for conducting excess interior coating material away from the container, a spray nozzle movable within and relative to said drain nozzle to project into the container opening for spraying a coating material onto the interior container surface, means for receiving excess interior coating material from said drain nozzle, a second spray nozzle disposed adjacent the outside of the container and having spaced elongated slits therein for directing separate films of coating material onto the exterior surface of the container as the latter is moved relative to said second nozzle, means for moving said drain nozzle and said spray nozzle relative to one another and to said container opening, and an outside drain segregated from said excess interior coating material receiving means for receiving and removing excess exterior coating material sprayed by said second nozzle onto the exterior surface of the container, whereby to prevent mixing of said drained interior and exterior coating materials.

' 9. In a machine for applying coating materials onto the interior and exterior surfaces of containers, the combination of a rotatable carrier having means for rotating the same, a plurality of drain nozzles mounted on said carrier and individually insertable into the containers for closing on the open ends of the same and for conducting excess interior coating material away from the containers, a plurality of spray nozzles on said carrier and respectively mounted within said drain nozzles for applying a coating material onto the interior container surfaces, a fixed coating supply manifold disposed exterioriy of and adjacent the path of travel of the containers on said carrier, said manifold being apertured at intervals to provide spaced elongated orifices directed toward the moving containers for applying a coating material on the exterior surfaces thereof, means actuated by the rotation of said carrier for moving said drain nozzles and said spray nozzles relative to one another and to said containers, and separate drainmeans respectively movable with and disposed in fixed relation to said carrier for removing excess interior and exterior coating materials from said containers to prevent mixing of said drained coating materials.

SAMUEL S. JACOBS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 168,978 Firm Oct. 19, 1875 1,201,219 Day Oct. 10, 1916 1,374,994 Day July 27, 1920 1,952,760 Iang Mar. 27, 1934 2,275,437 Hopkins Mar. 10, 1942 2,342,307 Smith Feb. 22, 1944 2,359,838 Gladfelter Oct. 10, 1944 2,373,604 Schweitzer Apr. 10, 1945

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US2359838 *Jul 29, 1940Oct 10, 1944Crown Cork & Seal CoWax coating machine
US2373604 *Sep 7, 1939Apr 10, 1945Schweitzer Howard VPainting machine
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2757634 *Oct 30, 1953Aug 7, 1956American Can CoContainer coating machine
US3189242 *May 23, 1961Jun 15, 1965Sheffield Plastics IncCoated expanded resin container
US3792681 *Feb 16, 1970Feb 19, 1974Int Paper CoApparatus for injection spraying of containers
US4051805 *Nov 11, 1975Oct 4, 1977Amchem Products, Inc.Can washing and coating system
US8309172 *Jun 9, 2008Nov 13, 2012Ricoh Company, Ltd.Method and device for coating hollow cylindrical member
Classifications
U.S. Classification118/316, 118/317, 118/319, 118/DIG.400
International ClassificationB05B13/06
Cooperative ClassificationB05B13/0609, Y10S118/04
European ClassificationB05B13/06A