US1906617A - Flat-top screw-threaded vial manufacture - Google Patents

Description

May 2, 1933. w, H KEY 1,906,617

FLAT TOP SCREW THREADED VIAL MANUFACTURE Filed Nov. 9, 1931 5 be .usedffor liquids or powders, although such vials and their caps have heretofore Patented May 2, 1933 I WIILLIA'M'HQ-Y xnzonvmrmmb, new JERSE ssmnoafro xmnmemssicoin PANY, or VINELAYND, NEW JERSEYQA CORZBOBATION or ILLINOIS ILan'roFscBEw-THREADED .vrAr. MAN AC UR Y Application'filed November 9, 1931.. Serial No. 573,763.

Glass vials with screw-threaded necks for theaecommodation and attachment in place of threaded closures orcaps. for the containforming machine, granted 'November 28,

Owing, however, to the tools employed in such cmachinesijandto their manner of use and cooperation with one another, the end of the neck around the mouth of the vial has seldom, ifever, been sufiiciently fiat and smooth so thatthe companioncap would seal the container tight, wherebyitcould not been employed-inlarge quantities for other.

purposes: H

c Iwhave madesuch improvements in the tools or implements functioningto produce thethreaded necks of such vials that flat-top or plane-end vials can be commercially made 'onsuch machineland can, therefore, be employedinthe trade for purposes fo'rwh clr vials of this general. character have heretofore beenunsuiteda In making screw-neck machine of said LettersPatent'and incorporating. other features of improvement, the

screw-threads have. extended to-the end of the-vial neckaround the mouth of such re-, ceptacle, Withthe result that 'during their manufacture some of the soft or molten glass hascbeensqueezed outbetween the forming faces to sealthe-containers tightly and ef-H fectively.

Accordingly, machine, which I employ is substantiallyulike that of said Letters Patent, with the exception of thetools and the shapes of the cams which effect the action 'ofsuch glass-shaping implements; From an understanding ofwhat follows it, is -an';easy;matter to adapt the patented glass vials on the 1 machine ,to Work the new tools in the manner indicated hereinafter, and, accordingly,

- it-is deemed unnecessary to duplicate in :this patent the -mechanism of the I earlier patent to which reference ismade for the details of construction. v

e I have found that byusing a relativelyflat, nonrotating plunger inside of the heated end of the tubular glass blankv from which the vlal isto be formed, instead of employin the patent, the desirable advantageaccruesthat the plunger or insideforming element affords an amount of friction on the inside of the vial neck to clear up and polish theglass and, to prevent carbon fromytheoil usedfon theplunger fromsettling thereon and makings-it somewhat rough.

' If suchcarbon finds lodgment onia rotary atiiad marin the groove of.

' thethread-forming roller extends from one end of the roll'er toflitsopposite end, the result being that some. of the 'hot glass in such" vhelical groove ,or channel during, the

performance ofits thread-forming function squeezesout ofpne end of the groove enough toprevent-the top or end of the neckfrom' being perfectly fiat. I I 1 I In my improvedmachinethis detrimental effect is avoided by using a rotary-threadiproducing die, the spiral-thread groove inwhich does not reach to that end of the'die atthe mouth of the vial, and, at the same time the neck-forming tool remains in action to vhold the soft glass in close'contact with the abutment ofthe plunger which forms the flat mouth or: top end ofthe vial."

- Thus by using these improvements Zinico operation I am enabled to manufacture flattop, screw-threaded-vials with rapidity. and economy. i

both fromvstructural and functional stand-.

-00 ing a round, revoluble plunger asdisclosed points, in the accompanying drawing I have illustrated present, preferred method and means of forming such vials, the illustration being somewhat diagrammatical but sufficient for the present purpose.

In this drawing Figure 1 shows in elevation the heated end of the tubular glass blank and the three tools in retracted position;

Figure Qis a similar view with the tools advanced, the plunger having entered the open mouth of the blank; I

Figure 3 illustrates the next step in the operation, the forming of the neck;

Figure 4 reveals the succeeding step which comprises the production of the screwthread on the exterior of the neck; and

-Figure 5 is a perspective view of the plunger or inner tool. V

The glass tube or blank 10 is supported and rotated by the means presented in the patent referred to, or by any other convenient and appropiate mechanism, and, after the end section of such blank has become sutficiently heated so that the glass is soft, a flat plunger orinside-former 11, having an abutment or shoulder 12, is slid into such end of the blank the proper distance by suitable mechanism such as set forth in the patent.

Then the neck-forming tool 13, which has traveled forwardly with the plunger 11, is, by means similar to'that' illustrated in the patent, moved up to the heated end portion of the blank, and it, in conjunction with the shouldered plunger, fashions or shapes the soft glass of the rotating blank into a suitable neck with a flat top or end, as shown in Figure '3.

Thereupon, and while the plunger 11 and the neck-forming tool 13 are both still in engagement with the blank, as: specified, the revoluble, thread-forming die-roller '14,

which was also carried forwardly with the plunger, moves in toward'the neck, contacts 7 therewith, and is rotated thereby, so that the groove 15 inthe die produces the screwthread on the outside of the neck,'asillustrated in Figure 4.

As is clearly depicted, the groove 15 of the die extends to that end of the die-roller'14 nearest the body or main portion of the tubular blank, but such groove ends or terminates short of the other end of the roller, with the result that the screw-thread on the vial neck does not reach to the corresponding end of the vial but continues, nevertheless, to' the other end of the neck. 7

By having one end of the groove 15 closed, the hot'glass cannot squeeze out of such end, and therefore, cannot interfere with the production and maintenance of a truly flat end for the neck-against which the cap may bear.

Also, during the production of the thread on the neck, the tool 13 holds the plastic glass against the shoulder 12, thereby assuring the flatness of the top in the finished product.

The threaded neck having been formed on the blank, the tools automatically separate and recedeto their original position, so that the finished product may be readily removed from the machine.

The invention has been stated in the following claims, but it is to be borne in mind that many more or less minor or radical changes may be incorporated in the preferred mechanism without departure from the heart of the invention and without the loss of any of its substantial advantages.

I claim: a

1. In a machine for forming screw-threaded necks on glass-vials, the combination of means to rotate a tubular glass-blank about its axis, means to heat an end section of said blank, a shouldered plunger adapted to enter the heated end of the blank, a neck-forming tool adapted to bear on the exterior of the heated end portion of the blank and form the neck thereon, a rotary screw-threadforming roller adapted to bear on the outside of the heated neck of the vial to provide the screwthread thereon, said roller having a spiral thread-forming groove terminating short of the corresponding end of the roller to stop the thread on the vial-neck short of the openmouth end thereof, and means to slide said plunger into the open heated end of the t-ubular glass-blank, to advance the neck-forming tool to the heated section of the blank to provide the vial-neck thereon, and to advance the roller into engagement with the heated; vial-neck to form the screw-thread thereon, and to retract said plunger, tool and roller from the finished product, the shoulder of said' plunger by engagement with the end of the heated blank forming such end fiat and at right-angles to the axis of the blank.

2. In a machine for formingscrew-threaded necks on glass-vials, the combination of means to rotate a tubular glass-blank about its axis, means to heat an end portion of said blank, a non-circular non-rotatableshouldered plunger adapted to enter'the heated end of the blank, a neck-forming tool adapted to bear on the exterior of the heated end portion of the blank and form the neck thereon, a rotary screw-thread forming roller adapted to bear on the outside of the heated neck of the vial to provide the screwthread thereon, said roller having aspiral thread-forming groove terminating short of the corresponding end of the roller to stop the thread on the vial-neck short of the openmouth end thereof, and means to slide said plunger into the open heated'end of the tubular glass-blank, to advance the neck-forming tool to the heated section of the blank to provide the vial-neck thereon, and to ad- I sectionof the blank to provide the vial-neck Vance the rollerinto engagement with the heated vial-neck toform the screw-thread thereon'while the plunger is in the ne'ck and with its shoulderbearingagainst the end of I the neck, and to retract said plunger, tool and roller from the finished product, the shoulder of said plunger by engagement with the end of the heated blank forming such end flat and at right-angles-to the axis of the blank.

3.; In a machine forformingscrew-threaded necks on glass-vials, the combination of means to rotate a tubular glass-blank about its axis, means to heat an end portion of said blank, a non-circular non-rotatable shouldered plunger adapted to enter the heated end ofthe blank, a non-rotary neckforming tool adapted to'bear on the exterior .of the heated end portionofthe blank and form theneck thereon, a rotary screwthread forming roller adapted to bear on the outside of the heated neck of the vial to I provide the screws-thread thereon, said roll-" er having a spiral thread-forming groove terminating short of the corresponding end of the roller tostopthe thread on the vialneck short of the open-mouth end thereof,

, and means to slide saidplunger into the open heated end of the tubular glass-blank, to advance the neck-forming tool to the heated thereon, and to advance the roller into engagement with the heated vial-neck to form the screw-thread thereon while the plunger is in the neck and with its shoulder bearing against the end of theneck and while the neck-forming toolis in engagement with the neck, and to retract said plunger, tool and roller from the finished product, theshoulthe blank and form the neck thereon, and a whereby itmay be brought to bear on the- 'der of said plunger by engagement with the end of the heated blank forming such end flat and at right blank. I

angles to the axisof the '4; In an appliance for forming screwthreaded necks on glass-vials,-the combination of a shouldered plunger adapted to be inserted in the heated open end of a rotating hollow glass-blank so that the blank end will bear against said shoulder, a neck-forming tool movable longitudinally with said plunger and shiftabletoward and from-said plungerwhereby it maybe brought to bear on the exterior of the heated end portion of revoluble screw-thread-forming' roller movable longitudinally with saidplunger and shiftable toward and from said plunger outside of the heated-neck of the vial to provide the screw-thread thereon, said roller I having a spiral thread-forming groove on,

its periphery terminating short of the corresponding end of' the roller to stop the of the heated blank orming such end flat of said plungerby en agement with theend andat right-angles to the axis of the blank.

5. In an appliance for forming screw-- threaded necks on glass-vials, the combina tion of a shouldered plunger adapted to be inserted in the open heated end of a rotating hollow glass-blank so that the end of the blank will bear against said shoulder, a neck-forming tool shiftable toward and .from said plunger whereby it may be brought to bear on the exterior of the heat-' ed end portion of the-blank and form the neckthereon, and a revoluble screw-threadforming roller shiftable toward and from said plunger whereby itmay be brought to bearon the outside of the heated neck of thevial to providethe screw-thread thereon, J

said roller having a spiral thread-forming groove having one end reaching to and open at the corresponding end of the roller and having 'itsother end terminating short of a V the opposite end of the roller to terminate the thread produced on the vial-neckshort i of the openunouthend thereof, the shoulder of said plunger by engagement with the end of the heated blank, forming such end .flat and at right-angles to the axis of the blank. r t

6. In an appliance for forming screwthreaded necks on glass-vials, the combination of a fiat non-rotatable shouldered plungeradapted to be inserted in the open heated end of a rotatinghollow glass-blank .so that the end of the glass-blank will bear against said shoulder, a non-rotary neck forming tool shiftable toward. and from said plunger whereby it may bebrought to bear on the exterior of the heated 'end' portion of the blank and form the neck thereon, and a revoluble s crew-thread-forming roller shift- I able toward and from said plunger whereby it may be brought to bear on the outside of the heated neck of the vial to providethe screw-thread thereon, said roller having. a

" angles to the axis of the blank.

' In witness whereof I have hereunto set my hand, I

p 1 WILLIAM H. KEY;

thread produced on thevial-neck short of 7 I I the open-mouth endthereof, the shoulderv [spiral thread-forming-groove having one a

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