US1722556A

US1722556A - Can-body-forming machine

Info

Publication number: US1722556A
Application number: US62425A
Authority: US
Inventors: Cameron William
Original assignee: CAMERON CAN MACHINERY Co
Current assignee: CAMERON CAN MACHINERY Co
Priority date: 1925-10-14
Filing date: 1925-10-14
Publication date: 1929-07-30
Anticipated expiration: 1946-07-30

Description

July 30, 1929, w. CAMERON 1,722,556

CAN BODY FORMING MACHINE Filed Oct. 14, 1925 Patented July 30, 1929.

UNITED STATES PATENT OFFICE.

CAMERON, OF CHICAGO, ILLINOIS, ASSIGHOB EI IO. CAMERON CAN MACHINERY COMPANY OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

cAN-BonY-ronmamcmnn Application filed October 14, 1925. Serial No. 62,425.

This invention relates generally to machines for forming can bodies and pertains more particularly to a mechanism for necking in said bodies. v

' Those can bodies which are designed to re-' eeive a removable slip cover at one end are preferably necked in or reduced in diameter at the end which receives the cover substantially the thickness of the tin plate from which the body and cover are formed, so that the flange of the cover will lie flush with the exterior surface of the body thereby presenting a smooth surface for the reception of a label or other paper covering which customarily surrounds the can.

It has heretofore been customary to pcr form the necking in operation by means of internal expanding dies cooperating with external contracting dies which together reduce the diameter of one end of the can, or in other words, accomplish the necking in.

Prior to my invention the use of internal expanding dies has been considered essential for two reasons; first, because it was custo-r 25 mary to neck in the rear rather than the forward end of the body and it was necessary to reduce the size of the internal die 'after the neeldng in operation, in order that the necked in end of reduced diameter might be slid over the die and discharged,-and second; because it was not considered possible to do a smooth necking in job and produce an unerinkled necked in body unless the necking in operation were started with the inner die in contact with the inner perimeter of the body whereby the metal of the body would be held between the internal and external dies and prevented from crinkling while the necking in operation was being performed.

I have discovered,- however, that the necking in operation can be satisfactorily per-l formed on a solid non-expansible mandrel which is not only much cheaper to manufacture but is also more durable in use and furbe "performed not only satisfactorily but in 2. vealsuperior manner.

' er obj ects and many advantages of my invention should be readily appreciated, as:

the same becomes better understood, by referlivery end of this horn is attached m novel Fig. 3.

thermore,by my invention, the necln'ng in can the housing broken away to show the under lying parts, of a necking in mechanism em bodying my invention.

Fig. 2 is a sectional new on the line2-2 of Fig. 1 and Fig. 3 is anenlarged vertical sectional view through the mandrel and a portion of the dies and alsoshowing feeding mechanism.

Referring to the drawings more in detail, reference character 5 indicates a base adapted to be mounted upon a bracket at the rear end of acan body forming machine and upon the base is supported a housing 6 within which the external necking in dies are mounted. A

portion of the horn 10 which extends longitudmally' of the can body. forming machine and upon which the can bodies are formed, is I shown in Figs. 2 and 3 and to the rear or denecking in mandrel, the details of WlllCh will, be later described. 7

The housing 6 which is disposed in alignment with the neckin in die is provided internally with a plurality of radially disposed webs 7 forming a series of guide-ways, preferably four in number, in each of which a die carrier 8 is adapted to reciprocate. Each die carrier 8 is equipped at its inner end with a die 9 secured to the carrier by a bolt 11, the inner or operable-portions of the dies being shaped to conform to the contour of the necking in mandrel. as will be apparent from Each die is normally urged outwardly away fromthe mandrel by aspring 12 and is. forced inwardly into cooperative relation with the mandrel by a roller 13 mounted upon an oscillatory ring 14 which is oscillated in the usual manner through a reciprocatory link 15 to move the rollers along the cam surfaces 16 formed at the outer end of each die carrier so that all the dies are forced inward- Each spring 12 is compressed between the end of a slot formed: in its die carrier and a made in one piece, I prefer, in order that it may be adapted formaking necks of various lengths, to make it win a. plurality of pieces. For instance, as shown in 2 and 3, it comprises an inner piece or plate 19 of ly secured to the end of the horn by bolts A can body is fed along the horn to the necking in station bv any suitable feed mechanism and, when properly positioned, the dies 9 are forced inwardly with sufiicient power to displace the metal of the can body inwardly from its original plane, a distance substantially equal to the thickness of the tinplate to thereby form the inwardly offset neck 24. The cooperative action of the solid mandrel and the inwardly moving dies is suchthatthe neck is formed smoothly and without the production of wrinkles in the tin and since the mandrel is of solid construction, it may be economically manufactured and its dur ability is almost unlimited. Longer or shorter necks may be produced by substituting a thicker or thinner plate for the plate 21 shown in the drawings. It is customarily desirable that can bodies of this t pe be also slightly mouthed in at the necke in end in order to facilitate the positionin of a cover thereon and where this is desirable, the dies may be formed with a. slight inward projection to bend the edge of the body inwardly as indicated by reference character 25.

. nature.

advantages of my invention should be understood and appreciated from the foregoing without further description and it should be obvious that the variations in the mechanical details disclosed may be resorted to within wide limits without exceeding the Scope of the invention as defined in the following claim.

Iclaim:

In a can body forming machine, the combination of a horn upon which can bodies are formed and along which said bodies are longitudinall mandrel orming anextension of said horn and comprising a plurality of solid flat sections of difl'erent diameters disposrd face to face and removably secured to said horn so as to be replaceable by other sections corresponding to the sizes of different bodies to be necked, and external dies adapted to coinpress a can body around said mandrel to efl'ect the necking in operation.

In witness of the foregoing I v GALEERON.

fed in succession, a necking-in