US2132041A - Can sealer - Google Patents

Description

Oct. 4, 1938. cv NELSON CAN SEALER Filed July 8, 1955 2 Sheets-Sheet l INVENTOH' CARL. NELS N 5Y6 M Ml ATTO NEY5 Oct. 4, 1938. c. NELSON 2,132,041

CAN SEALER Filed July 8, 1935 '2 Sheets-Sheet 2 INVENTOR CAR L N E LSON BY WK M l-'4 ATTORNEY Patented Oct. 4, 1938 UNITED STATES PATENT OFFICE tional Pressure Cooker Company, Eau Claire,

Wia, a corporation of Wisconsin Application July 8, 1935, Serial No. 30,345

3 Claim.

This invention relates to new and useful improvements in can sealers of the portable type and more particularly to a novel means for relatively adjusting the seaming rollers with respect to the can. I,

An object of the present invention is to provide a can sealer comprising a plurality of seammg rollers supported upon pivoted arms having means for actuating them whereby the seaming rollers are alternately moved into and out of seaming engagement with the can closure, and eccentric means being provided in connection with said arms whereby they may be relatively adjusted with respect to the-can to accurately position them with respect thereto.

Other objects of the invention reside in the novel construction or the frame of the can sealer, whereby suitable eccentrics are provided in the upper portion thereof for relatively adjusting the seaming rollers with respect to the can; in

the construction of the machine frame which comprises a base having upright posts secured thereto and to the upper ends of which is secured a cross head in which the driving mechanism of the can sealer is supported, and the upper portions of said posts being provided with eccentrics, whereby the arms which support the usual seaming rollers, may be relatively adjusted to accurately position the seaming rollers with respect to the can closure; and in the provision of a can sealer which is extremely simple and inexpensive in construction, whereby it maybe manufactured at small cost..

Other objects of the invention will appear 'from the following description and accompanying drawings and will be pointed out in the annexed claims.

In the accompanying drawings, there has been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as various changes may be made within the scope of the claims which follow.

In the drawings:

Figure 1 is a rear view of a can sealer showing the invention embodied in the construction thereof;

Figure 2 is a sectional plan view on the line 2-2 of Figure 1, showing the arrangement of the arms which support the seaming rollers and the driving means therefor;

Figure 3 is a detail sectional view on the line M of Figure 1, showing the eccentric means provided at the upper ends or the uprightposts for relatively adjusting the seaming rollers with respect to the can; and

Figure 4 is a view showing a modified construction wherein the eccentrics are made independently of the posts and are adjustably supported thereon.

In the selected embodiment of the invention here shown, there is illustrated in Figure l, a can sealer, the general construction of which is similar to the one disclosed in my pending application, Serial Number 30,344, filed July 8, 1935.

The can sealer as here shown, comprises a base 2 provided with suitable clamping elements, generally indicated by the numeral 3, whereby the sealer may be conveniently clamped to a suitable support such, for example, as a table top. A lower chuck plate d is rotatably mounted in the base and is adapted for vertical movement by a cam device 5 having an operating handle 6 which, when rotated in one direction, will cause the chuck plate i to be elevated.

Upright posts 1 are shown provided with reduced end portions 8, received in apertures in the base 2 and secured therein by suitable nuts 9, as best illustrated in Figure 1. The upper ends of the posts 7 have reduced portions ii adapted to be received in suitable apertures provided in a cross head i2, and which is secured to the terminals it by suitable nuts it.

An upper chuck plate it, having a knurled periphery adapted for driving engagement with a can closure, is detachably secured to a bevel gear 85, which, in turn, is secured to a suitable shaft ll, rotatably mounted in bearings provided in the cross head i2. A bevel pinion i8 is rotatably mounted upon a stud l9 and has an operating crank it secured thereto, whereby it may be conveniently rotated thereby to drive the chuck plate it, it being understood that the pinion is constantly meshes with Qie bevel gear it.

Each post i is provided adjacent its upper end with a reduced portion 22, upon which are piv- 'otally mounted suitable arms 23, each carrying a seaming roller 26. The reduced portions 22 of the upright posts '5 are eccentrically disposed with respect to the axes of the posts I, as best shown in Figure 3, whereby they function as eccentrics to relatively adjust the arms with respect to the can, and whereby the seaming rollers may be accurately positioned with respect to the can closure.

Each arm 23 has a iorked end portion 25 adapted to receive a connecting bar 26, which is coupled thereto by suitable coupling pins 21.

A plurality of apertures 28, 29, and 3| are provided in the forked end portions 23 of the arms 23, adapted to be alined with suitable apertures provided in the connecting bar 26, and whereby the spacing between theseaming rollers 24 may be varied to adapt the sealer for diflerent sizes of cans. The apertures 28, 23, and 3|, in the forked end portions 25 of the arms provide means whereby the can sealer may be quickly adjusted to diflerent sizes of cans, by simply withdrawing the coupling pins 21 and shifting them into other apertures corresponding to the size of can to be sealed.

Reciprocal movement is imparted to the connecting bar 26 by a cam 20 operatively connected to the shaft l1, and adapted to engage a forked member 30 secured to the connecting bar, as illustrated in Figure 2. This mechanism is shown and described in detail in my copending application, hereinbefore mentioned, and it is therefore thought unnecessary to herein describe the same in detail.

In order to hermetically seal the can, the seaming rollers must be accurately positioned withrespect to the marginal flange of the can closure, so that when the seaming rollers are swung inwardly the maximum of their movement, they will press the rolled edge of theclosure and the flange of the can into sealing engagement with the can body to thereby hermetically seal the can.

The eccentrics 22 provided at the upper portions of the posts I provide means whereby the seaming rollers may be quickly and accurately adjusted with respect to the can by simply loosening the nuts 9 and I3 of each rod and inserting a small pin or instrument into an aperture 32 provided in each post and relatively rotating said posts until the seaming rollers are accurately positioned with respect to the can.

By the employment of the simple adjusting mechanism, herein disclosed, the can sealer is greatly simplified, as will readily be noted by reference to the drawings, particularly Figure 2, wherein the simplicity of the mechanism is clearly illustrated.

In Figure 4, I have shown a construction in which the upper end of each post I is provided with a reduced extension 33, upon which are mounted eccentric bushings 34, the lower ends of which are seated against the shoulders 35 of the posts I. The upper ends of the bushings are adapted to be engaged by the lower faces of the hubs 36 of the cross head I2, and whereby the eccentric bushings may be secured in ad- I justed position by manipulation of the nuts l3 provided in the upper ends of the posts I. In the 7. form shown in Figure 4, the hubs of the arms 23 are bored out to receive the bushing 34 and are rotatable thereon in substantially the same manner shown in Figure 2.

Each bushing 34 is preferably flanged at its lower end, as shown at 31, which flange may be provided with oppositely disposed flat faces to provide means for rotating it, or the periphery of the flange 31 may be suitably knurled so that when the bushing is released by loosening the nut It, the bushing may be conveniently rotated with the fingers thereby to accurately adjust the seaming roller with respect to the can. In the form shown in Figure 4, the upright posts I are permanently secured to the base I.

I claim as my invention: 1. In a can sealer, a base having upright pos secured thereto, a cross head secured to the upper ends of the posts, chuck plates for supporting the can, means for driving one of said chuck plates to rotate the can, a plurality of seaming rollers, arms for supporting said rollers, means operatively connecting together said arms whereby the spacing between the seaming rollers may be varied in accordance with cans of different diameters, eccentrics at the upper ends of said posts for supporting said arms, and means whereby said posts may be relatively operated to rotate the eccentrics and thereby relatively adjust the arms and seaming rollers with respect to the can.

2. In a can sealer, a base having vertically disposed apertures therein, a pair of upright posts fitting in said apertures, means for securing the posts in said apertures, said posts having their upper ends formed with reduced extensions, 9. cross head having apertures for receiving said extensions, means for securing the cross head to the posts, an eccentric formed on each post below the cross head, an arm pivotally mounted on each eccentric and each carrying a seaming roller, chuck plates for supporting a can to be sealed, means for driving one of said chuck plates; thereby to rotate the can, means for actuating the arms to cause the seaming rollers to be alternately moved into and out of seaming engagement with the closure and can, and means whereby said posts may be relatively rotated, thereby to actuate the eccentrics to relatively adjust the arms with respect to the can.

3. In a can sealer, a base having upright posts mounted thereon, eccentrics integrally formed on said posts, a cross head secured to the upper ends of the posts, chuck plates between which the can is supported, means for driving one of said chuck plates'to rotate the can, a plurality of seaming rollers, an arm rotatabiy mounted on each eccentric and each carrying a seaming roller, a member adjustably connecting together said arms whereby the spacing between the seaming rollers may be varied in accordance 'with cans of different diameters, and means whereby said posts may be relatively rotated in said base, thereby to rotate the eccentrics to accurately position the seaming rollers with respect to the edge of the can closure and top.

CARL NELSON.

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