US1838082A

US1838082A - Machine for coating can ends

Info

Publication number: US1838082A
Application number: US354327A
Authority: US
Inventors: Coyle John
Original assignee: Continental Can Co Inc
Current assignee: Continental Can Co Inc
Priority date: 1929-04-11
Filing date: 1929-04-11
Publication date: 1931-12-29
Anticipated expiration: 1948-12-29

Description

Dec. 29, 1931.

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0 ,2? M I? 15 y m J. COYLE MACHINE FOR COATING CAN ENDS Filed April 11, 1929 5 Sheets-Sheet l dtkozwet s Dec. 29, 1931. COYLE 1,838,082

MACHINE FOR COATING CAN ENDS Filed April 11, 1929 5 Sheets-Sheet 2 Dec. 29, 1931. J. COYLE MACHINE FOR COATING CAN ENDS Filed April 11, 1929 5 Sheets-Sheet 5 Dec. 29, 1931. J. COYLE MACHINE FOR COATING CAN ENDS 5 Sheets-Sheet 4 Filed April 11, 1929 Dec. 29, 1931. COYLE 1,838,082

MACHINE FOR COATING CAN ENDS Filed April 11, 1929 5 Sheets-Sheet 5 amnion Patented Dec. 29, 1931 UNITED STATES PATENT OFFICE JOHN 'COYLE,

0F BALTIMORE, MARYLAND, ASSIGNOR T0 CONTINENTAL CAN COMPANY, INC., OF NEW YORK, N. Y.,.A CORPORATION OF NEW YORK MACHINE FOR COATING CAN ENDS Application filed April 11,

The invention relates to new and useful improvements in a machine for applying a sealing coating in the channel of an irregular shaped can end.

An object of the invention is to provide a coating machine wherein the coating is applied with a nozzle which travels over the channel of an irregular shaped can end while said end remains stationary.

A further object of the invention is to provide means for controlling the flow of the coating material from the nozzle.

A stillfurther object of the invention is to provide a coating machine of the above type wherein the means for controlling the flow of the. coating from the nozzle is so constructed as to lay a coating of uniform thickness in the channel throughout the entire extent thereof.

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

In the drawings which show by way of illustration one embodiment of "the invention I. i k ,r Fig. 1 is a view partly in vertical section and partly in side elevation showing a machine embodying the improvements.

2 is a vertical sectional view through a portion of the machine on an enlarged scale.

Fig.3 is a sectional view on the line 33 of Fig. 1.

Fig. 4 isa view partly in plan and partlyv chine for coating irregular shaped can ends which are held stationary during the coating thereof." The machine includes a supporting chuck for the can end which is shaped 1929. Serial N0.354,327.

so as to hold the can end in a predetermined position on the chuck. The chuck is raised and lowered for presenting the can end to thenozzle for coating. The nozzle for applying the coating is supported by a bar which is mounted so as to move the nozzle over the channel in the can end. The path of movement of the nozzle conforms to the outline of the channel and as the nozzle follows around the channel the coating is applied to the channel. The nozzle is above the can end so that the can end is placed with its channel facing upward on its supporting chuck. The nozzle is moved by two devices disposedat the opposite ends of the bar which support the bar and impart movements thereto which conform to the shape of the channel in the can end. This is accomplished by a pattern cam associated with each device, a roller on the bar running in said pattern cam and a propelling means'which includes a rotating disc having a radial slot and a block slidably mounted in said slot and engaging a roller on the bai. Thus it is that the rotation of the disc will cause the roller to follow around the pattern cam and thus impart a bodily movement to the bar which in turn causesthe nozzle supported thereby to follow the outline of the channel in the can end. Means is provided for regulating nozzle. This is accomplished by a control plate operating on a lever for opening the valve. The valve is closed by means of a spring. The control plate is raised and lowered by a lever having a roller running on a p'atterncam. Thus it is that the flow of the sealing material may be cut off so as to allow the coated end to be removed and an end to be coatedto be placed on the chuck.

When the chuck is raised into proper position for coating, then the cam through the control lever opens the valve and allows the coating to flow from the nozzle. This control cam may be so proportioned as to partially close the valve during coating for-regulating the supply at different points in the coating of the end. The speed of travel of the nozzle is a variable speed, inasmuch as the actuating devices have a shiftable connection as shown in the drawings is provided with tion, the speed of travel is less than when it is moved outward away from the center of rotation. The control cam may be so Y shaped as to regulate the supply so that with the variable speed of travel of the nozzle a uniform layer of coating may be applied to the can end.

Referring more in detail to the drawings, the machine in the illustrated embodiment of the invention includes a main frame 1 which is provided with two supporting

columns

2 and 3 and a central frame structure 4. Mounted in this central frame structure 4 is a support for a chuck 5 on which the can end 6 is placed for coating. This support for the chuck 5 includes a standard 7 mounted for reciprocation in a suitable bearing in a depending bracket 8 carried by the central frame of the machine. The standard is slotted at 9. Housed in this slot is a spring 10; the spring 10 at its upper end engages a positioning pin 11 fixed to the upper end of the standard. The spring at its lower end surrounds a pin 12 mounted on an abutment bracket 13. The upper end of the standard is secured to the chuck by suitable set screws 14. The spring normally tends to raisethe standard. 9

Connected to the lower end of the standard is a lever 15. This lever is in yoke form and the members of the yoke are secured to a collar 16 by means of pins 17. The lever is freely supported on a shaft 18. This shaft 18 is mounted for oscillation in supporting bearings 19 carried by the main frame. Attachedto the shaft 18 is an arm. 20. The arm 20 is provided with a segment slot 21 (see Fig. 7). A bolt 22 passing throughthis slot is threaded into the lever 15, and thus it is that the arm 20 may be set in different angular positions relative to the lever 15' and secured thereto in its set positions. On the end of the arm 20 is a roller 23. This: roller 23 runs on a cam 24 carried by a hub 25 mounted on ball bearings 26 carried by the depending bracket 8. The hub 25 is attached to and supports an actuating gear 27. When this gear is rotated the cam 24 will be rotated and this cam is so shaped as to press downwardly on the arm 20 and thus oscillate the shaft 18 and lever 15 so as to 'move the standard and the chuck 5 downward compressing the spring 10. The spring holds the roller 23 pressed against the cam 24 and at the proper time the cam will standard and chuck to be raised.

The can end 6 is shown more in detail in Fig. 6 of the drawings. This can end is provided with a central depressed portion 28, a flange29 at its outer edge and a chanhel 30 located between this central depressed portion 28 and the flange 29. The can end permit the ends to can bodies.

The coating is applied to this channel by means of a nozzle 31. The nozzle 31 is mounted in a supporting bar 32. The nozzle.

31 includes a supporting structure 33 onto which the nozzle is threaded and the bar 32 is provided with an opening conforming to a sleeve carried b the base structure and the .8

nozzle so that the base structure may be placed on the upper faceof the bar with the nozzle projecting through the opening and below the bar. The base structure is provided with a conduit 34 through which the coating material flows from a supply pipe 35. This supply pipe 35 is of a flexible character so that the nozzle may be moved in a path conforming to the shape of the channel in the can end. The supply of the coating from the nozzle is controlled by a needle valve 36 mounted in the supporting structure 33 and controlling the discharge openingof the nozzle from within. This needle valve 36 is connected to a lever 37 pivoted at 38 on a bracket carried by the supporting structure 33. In the outer end of the lever 37 is a rod 39 which is clamped to the lever by means of a clamping bolt 40. A spring 41 bears against the bar 32 at its lower end and encircling the projecting end of this rod 39 bears against the lever and normally raises the outer end of the lever thus depressing the needle valve 36 so as to close the nozzle.

The upper end of the rod 39 carries a shoe 42 which contacts with a control plate 43. The under face of the control plate 43 is a smooth horizontal surface and the shoe slides freely on this surface so that the control plate does not in any way interfere with such movements of the bar 32 as may be necessary to cause the nozzle to follow the channel in the can end. The control plate is mounted on two swinging

arms

44, 44 which are pivoted to a supporting bracket 45 mounted at the upper end of

standards

46, 46 which in turn are mounted on the central frame structure 4 of the machine. Also carried by the bracket 45 is a lever 47. The lever 47 is pivoted at 48 and is connected by a link 49 to the control plate. As the lever 47 is oscillated the arms- 44, 44 will be swung toward and from a vertical position and this will raise and lower the control plate at the same time always holding said control plate in a horizontal position. The lever 47 carries a roller 50 which by a shaft 56. The shaft 56 is rotated by means of a sprocket chain 57 cooperating'with a sprocket on the shaft 56. This sprocket chain cooperates also with a sprocket on the main driving shaft 58.

The cam 51 is provided with a concentric portion a which is of maximum diameter and diametrically across the disc.

. the control plate.

when the roller is running on this portion a the control plate is raised to its extreme upper position and the valve is closed by the spring'41. This control cam 51 is also provided with concentric portions 6, b, b and intermediate these sections 6 are projections c of greater diameter. As the roller passes onto the section bthe valve will be fully opened through the spring 53 moving the roller'so as to swing the lever 47 in the direction to lower The lowering of the control plate opens the valve. When the section 0 passes the roller 50 the valve will be partially closed. The nozzle as it follows the channel has a variable speed of travel due to the fact that the roller on the control bar is shifted toward and from the center of rotation of the actuating member. The control cam is so shaped as to control the flow of coating so as to produce a uniform thickness of coating with this variable speed of travel of the nozzle. The nozzle is near its maximum travel when the roller moves off the concen tric portion and opens the valve. As the nozzle approaches another position of maximum speed the roller passes over the projection c and closes or partially closes the valve. Thus it is that a coating of uniform thickness is formed. V

The supporting and control bar 32 for the nozzle is mounted 'so as to move freely in an endwise direction and also freely laterally on the

columns

2 and 3. The mechanisms asso-' ciated with each co'lumn are similar and the description of one will answer for theother. Atthe upper end of the column there is a head 59 with which is associated a cap plate 60. The bar 32 lies between the cap plate and the head 59. Mounted centrally of the col umn is a shaft 61. The shaft 61 carries a disc 62 which is provided with a slot 63 extending Mounted in this slot 63 is a block 64. A roller 65 is se f cured to the under face of the bar 32 and engages this block 64. The block is free to slide radially of the disc 62. When the roller 65 is set eccentrically to the axis of the shaft 61 then the bar 32 will be given a lateral movement as the disc 62 rotates. Mounted in the cap plate 60 is a control cam plate 66. Said control cam plate is provided with a control endwise direction and this cam control raceway controls the movements of the bar 32. Inasmuch as there is a. control cam at both ends of the bar and an actuating device at both ends of the bar, the bar will have a bodily movement, every point of which moves in a path conforming to the shape of the control cams and also conforming to the shape of the channel in the can end. For different size can ends or for different shape can ends the control cam is, of course, changed and one substituted conforming to the shape of the channel which it is desired to coat.

The main shaft 58 carries a bevel gear which meshes with a bevel gear 71 on the shaft 61 in the column 3. This imparts rotation to the shaft 61 therein and in turn rotation to the actuating disc in the head at the upper end of the column 3. On this shaft 61 is a spur gear 72 which meshes with the gear 27. Thus it is that the cam 24 is rotated.

The gear 27 also meshes with a spur gear 73 fixed to the lower end of the shaft 61 in the column 2, and thus it is that the shaft 61 is 1 nel in the can end and as these control discs 3 rotate the bar 32 will be given a bodily movement so that the nozzle will travel about the channel in the can end supplying the coating thereto. The cam 51 is operated by the main shaft 58 and in timing with the movements of the chuck so that when the chuck is in proper position to be coated the control plate for the valve regulating the supply of coating from the nozzle is lowered so as to open the -valve and permit the coating to flow from the nozzle onto the can end. The coating is preferably delivered to the nozzle under air pressure so that there is a free flow of thecoating immediately upon the opening of the nozzle. The nozzle will travel about the channel until the end is properly coated after which the valve is closed, the chuck is lowered and the end may be removed. Any suitable means may be provided for placing the ends on the chuck and removing the same till during therefrom. It will be noted that the can end is stationary when the coating is ap lied thereto and, therefore, there is no distur mg centrifugal force acting on the coating as it comes in contact with the end and this enables. a very uniform laying of the coating in the channelto be accomplished.

It will be understood from certain aspects of the invention that the control of the valve coating will not be necessary, in which case t e control cam 51 will be shaped so as to Irlerely open the valve in proper timing with the presentin of the end and to close the valve at the en of the co'atin operation.

It is obvious that the structure or supportingand movin the nozzle, also for holding the can. en may be varied without departing from the spirit of the invention as set forth in the appended claims.

Having fully described my invention, What I claim as new and desire to secure by Letters Patent, is

1. A machine for coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting a can endto said nozzle for coating and for holding said end stationary. during coating, means for supporting said nozzle and for moving the same in a path conforming to the channel in the end to be coated, a control valve for-said nozzle, a lever connected to the control valve and moving with the nozzle, a spring hearing on the lever for normally holding the valve closed, a control plate with which said x lever makes. contact continuously throughout the movements of the valve, and means for shifting-the position of the plate for controlling the valve? g 2. A machine for coating irregular shaped can'ends comprising a coating nozzle, a can end chuck for presenting a can end to said nozzle for coating and for holding said end stationary during coating, means for supporting said nozzle and for moving the same in a path conforming to the channel in the opening and closing the 'valve.

3. A machine for coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting a can end to' said nozzle for coating and for holding said end stationary during coating, a supporting bar to which said nozzle is attached, means at the opposite ends of said bar for supporting and moving the same bodily for causing said nozzle to travel in a path conforming to the channel in the end to be coated, each of said means including a control cam, a rolleron the bar engaging said cam, and an actuating device for causing the roller to follow the cam.

4. A machine for coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting a can end to said nozzle for coating and for holding said end stationary during coating, a supporting bar to which said nozzle is attached, means at v the raceway, and a roller on the bar engaging said shiftable member, said disc being disposed relative to the control cam so as to cause said roller to follow the control cam.

5. A machine for coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting a can end to said nozzle for coating and for holding said end stationary during coating, a bar for support ing said nozzle, means at opposite ends of the a bar for supporting and moving said ba r so as to cause the nozzle to travel in a ath conforming to the channel in the end to e coated, a control valve for said nozzle,'a lever moving with the nozzle and connected to said valve, a spring bearing on the lever and holding the valve closed, a control plate having connection with said lever, and means for shifting said'control plate for controlling the valve during the movements of said nozzle.

6. A machine for coating irregular shaped t can ends comprising a coating nozzle, a can end chuck for presenting a can end to said nozzle for coatlng and for holding said endstationary during coating, cam means for raising and lowering said chuck and for' holding said chuck raised during coating, means for supporting and moving said nozzle in a path conforming to the channel in the end to be coated, a valve controlling said nozzle, a lever movable with the nozzle and connected to said valve, a spring operating on the lever to hold the valve closed, a control plate contacting with the lever, and means operated in timing with the chuck for shifting said control plate so as to open the valve when the end is properly positioned for coating and so as to close the valve when the end has been coated.

7. A machine for coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting a can end to said nozzle for coating and for holding said end stationary during coating, cam actuated means for raising and lowering said chuck and for holding said chuck raised during 7 coating, a bar to which said nozzle is attached, means at the opposite ends of said bar for supporting and operating the same for moving said nozzle in a path conforming to the channel in the end to be coated, a control valve for said nozzle, a lever connected to the valve and movable with said nozzle, a spring operating on said lever for closing the valve,

a control plate contacting with the lever, a cam for shifting said control plate in timing with the movements of the chuck for opening the valve when the end is positioned for coating and for closing the valve after the end is coated.

8. A machinefor coating irregular shaped can ends comprising a coating nozzle, a can end chuck for presenting ,a can end to said nozzle for coating and for holding said end stationary during coating, means for supporting the nozzle and for moving the same in a path conforming to the channel in the end to be coated and at a variable speed, a control valve for said nozzle, and a control cam for the valve shaped so as to control the flow of the coating from the nozzle so as to produce a uniform thickness of coating on the can end.

In testimony whereof, I afiix my signature.

JOHN GOYLE.