US2391341A - Machine for applying sealing compound to container ends - Google Patents

Description

. Dec. 18, 1945. P. E. PEARSON ET AL 2,391,341

MACHINE FOR APPLYING SEALING COMPOUND T0 CONTAINER ENDS- Filed Nov. 25, 1945 2 Sheets-Sheet 1 'Dec. 18, 1945. P. E. PEARSON ET AL MACHINE FOR APPLYING SEALING COMPOUND TO CONTAINER ENDS 2 Shets-Sheet 2' Filed Nov. 23, 1943 Patented Dec. 18, 1945 ium'reo STATES e TEN OFFICE Paul E. Pearson and Alfred Treff, Chicago, 111., I assignors to ContinentalOan Company, Inc., New York, N. -Y., a corporation of New York Application November 23, 1943'. Serial No. 511,458

2 Claims. (01. 113 -8 The invention relates to new and useful improvementsin a machine, for applying a sealing compound to the channel of a container end, and

more particularly a container end which is ir-- Straight sides and rounded corners or an end which is oval in contour. 7

An object of the invention is to provide a machine which is adapted to flow a measured amount of sealing compound into the channel of the can end which is facing upwardly.

A further object of the invention is to provide a machine of the above type wherein the can end is clamped against its support by a channel engaging member shaped to conform to the channel of the can end and disposed so a to determine the outer limits of the coating as applied to the channel. l

A still further object of the invention is to provide a machine of the above type wherein a measured amount of sealing material is caused to flow down the inner wall of the channel engaging member into the channel of the can end for coating the same. v

Another object of the invention is to provide a machine of the above type with a means for stripping the sealing material from the inner wall of Figure 1 is a view partly in section and'partly in side elevation showing more or less diagrammatically the improved machine for applying a compound to the channel of a can end;

Figure 2 is a plan view of the same; Figure 3 is a detail in'section showin the can end clamped by the channel engaging member against the support therefor with the stripper in its lowered position; Figure 4 is a view similar to the stripper as raised so that the sealing compound in the measuring pocket is permitted to flow along the inner wall of the channel engaging member into the channel of the can end; and

Figure 5 is a view similar to Fig. 4, but with the stripper lowered and the sealing compound stripped from the inner wall of the channel engaging member into the channel of the can end. The machine for applying the compound to the channel of the can end includes a supporting irame I in which is mounted a reciprocating support 2 carrying a can end supporting pad 3. The supporting member 2 is mounted in a sleeve 2a carried by the frame. This supporting member 2 is connected by means of a bolt 5 to a lever 6 Fig. 3, but showing whichin turn is pivoted at "I to a sup-porting bracket. The lever 6 is slotted as indicated at 5a, and the bolt 5 passes through said slot. 7

Any suitable mechanism may be provided for placing the can ends on the pad of the machine with the channel facing upward and for removing thes-ame after the sealing compound has been applied thereto. The lever 6, when swung in a clockwise direction, will raise the can end to a coating position, and when swung in the opposite direction, the can end will be lowered to a position where it may be removed from the supporting pad. The pad is provided with a collar 30. which rests on the upper end of the sleeve 2a when in lowered position.

Mounted on the frame directly above the supporting pad for the can end is a cylinder 8 which is secured to the frame by suitable bolts 9. Said cylinder 8 is provided at the lower inner edge thereof with a depending channel engaging member III. This channel engaging member I 0 is shaped to conform to the channel of the can end which is to be coated. Said channel engaging member, when the can end is raised with the pad 3, enters the channel at the outer regions thereof, and, itserves two functions: first, it clamps the end against the pad and it also removes any bends Second. the channel engaging member will serve to limit the area of the channel to which coating is appliedand insure that the coating shall be flowed against and cover the inner wall of the channel. I

A short distance above this channel engaging member is a measuring pocket I I. Disposed within the cylinder 8 is a piston I2 which is adapted to beraised and lowered by a lever mechanism.

Said lever mechanism includes a bar I3 mounted into a bracket 22 carried by the frame. The bolt has a thread extending throughout the length thereof, and a stop nut 23 is adjustably mounted on the bolt and serves as a means for limiting the upward movement of the piston. There is a similar bolt 24 threaded into a bracket 25 carried by the frame which is likewise provided with a stop nut 26. By adjusting this nut 26, the downward movement of the piston can be regulated. The piston I2 is provided with a central passage 21 which connects with radial passages 28, 28. A pipe 29 is threaded into the upper end of the piston and serves as a means for supplying a sealing compound to the chamber formed by the passages 2'1 and 28. There is a channel 30 extending around the piston which connects the radial passages 28 so that the compound flowing into the passages 28 will fill "this channel 30. When the parts are positioned as shown in Fig, 3, the sealing compound will flow from the channel 30 into the measuring pocket H and fill .the same, .and when the piston is raised to the position shown .in Fig. 4, then the lower end of the piston is above the lower end of the pocket and the -sealing compound in the pocket will flow therefrom and. along the inner wall of the channel member into the channel -.of the end. The piston has a depending annular stripping member 3|, the under-face of which is preferably slightly concaved as indicated at :32.

The operation of the compound applying machine will be briefly described. The piston is moved to the lower end of its stroke, uncovering the measuring pocket so that it .is supplied with the coating compound. At this time, the pad is raised so as to bring the can end into contact with the channel engaging member I0. This channel engaging member is shaped 'to conform to the channel of the can end. The pad has a raised part which is also shaped to conform to thechannel of the can end and serves .as a positioning means so that the can end is properly positioned to receive this channel engaging member to. When the channel engaging member 10 contacts with the end, the end will be pressed firmly against the .pad, thus removing any unevenness in the bottom of the channeldue'to warping of the end. In other words, asalready noted, th bottom of the channel is leveled so .as to insure that a uniform coating of a flowing compound can be obtained. After the end is firmly clamped against the channel engaging member, then the piston is raised to the position shown in Fig. 4. This uncovers the pocket and permits the sealing compound indicated at S to flow along the inner wall of the channel engaging member and into the channel. The channel engaging member defines the outer limits of the channel area'to be coated and insures that the sealing material will be placed well back against the shoulder of the can end. After the sealing compound has flowed by gravity'outof the measuring pocket, thenthe piston is lowered and the stripper 3| will strip the sealing material adhering to the inner wall of the channel member and force it intothe channel of the can end. This stripper is limited in its downward movement as clearly shown in Fig. 5

of th drawings. The downward movement may be so regulated that the sealing material discharged into the channel will be forced well back against and up along the heel or inner channel wall. After the stripper has been lowered in the mannerstated, then the pad is lowered and the can .end with the coating applied thereto is removed from the pad.

It is obvious that many changes in the details of construction may be made without departing from the spirit of the invention as set forth in the appended claims.

Weclaim:

"1. A machine for applying a sealing compound to the channel of a can end comprising a support for the can end, a channel engaging member having a cylindrical inner wall and a projecting portion at its lower end adapted to contact with the can end and clamp said end against the support therefor, said channel engaging member having an annular recess in said inner face forming a measuring pocket for the sealing compound, a piston movable along said cylindrical wall of the channel engaging member, said channel engaging. member having a supply chamber for the sealing compound above said piston, said piston being movable relative to the recess so as to "connect the recess with the supply chamber on the down stroke of the piston-and uncover the recess onthe upstroke of the piston whereby the measured amount of sealing compound in the recess will flow along the inner wall -of-the channel engaging member into the channel of the can'end.

2. A machine for applying a sealing compound to thecharmelcf a can end comprisingasupport for the can end, a channel engaging member having a cylindrical inner wall and a projectin portion at its lower end adapted to contact with the can end in the outer region of the channel and clamp said end against the support therefor, said channel engaging member having an annular recess in said inner face forming a measuring pocket for the sealing compound, a piston movable along said channelengaging member having a supply chamber for'the sealing compound'above said piston, said piston being movable relative to the recess so as to connect the recess with the supply chamber on the down stroke of the piston and uncover the recess on the upstroke of thepiston whereby the measured amount of sealing com pound in the recess will flow along the inner wall of the channel engaging member into the channel of the can end, said piston having a stripper depending therefrom and adapted to strip the sealing compound adhering to the inner wall of the channel engaging member for forcing the coilnpound into the uncovered portion of the chan; ne

PAUL 'E. PEARSON. ALFRED 'TREFF.

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