US1521412A - Closure disk - Google Patents

Description

Dec. 30 1924' gLosURE DISK Filed NOV- 14' ma @M MM www.

Patented Dec. 30, 1924.

UNITED STATES PATENT OFFICE.`

WI'LBUB I4. WRIGHT, 0F FULTON, NEW YORK, ASSIGNO'R TO OSWEGO FALLS GOBPOB- TION, 0F FULTON, NEW YORK, A CORPORATION OF NEW YORK.

GLOSURE DISK.

Application tiled November 14, 1923. Serial No. 674,644.

To all wko/mit may cof/wcm.'

Be it known that l, WILBUR L. WRIGHT, a citizen of the United States of America, and resident of Fulton, county ot Oswego, State of New York, have invented certain new and usei'ul improvements in and Relating to Closure Disks, of which the following is a specification.

This invention relates to closure disks in cised at theitop surfaces to outline portions that can he partially split or stripped from the `topsrof the disks and bent up to :torm relatively thin lift or pull tabs for extracting the disks from the mouths of containers sealed therebyg andthe objects and nature ot the invention will he readily understood hy those skilled in the art in the light of the following explanations of the accompanying drawings that illustrate what l now believe to he the preferred mechanical expression or embodiment oi: my invention from among other orms and arrangements within the spirit and scope thereofu in object of the invention is to provide a closure disk that can he applied to closure mouths hy capping machinery, that can he imprinted on its top tace, that can he economically produced in large quantities by machinery, and wherein the top surface of the disk is so 'formed that a portion thereotI can be utilized to form a double end or double thickness litt usually arranged at the center ot' the disk, the disk being composed of paper or other material suitable for the purpose andfrom the top side of which, when suitablyincised, relatively thin plies or tabs can he partially stripped or split and bent up to form extracting lift or pull tabs.

With this and. other objects in view, my invention consists in certain novel features and in constructions and formations as more fully and particularly set forth and specified hereinafter.

Referring to the accompanying drawings, forming a part hereof:

Fig. 1 shows a closure disk in accordance with my invention, in top plan on a somewhat enlarged scale.

Fig. 2 is a similar view showing the incisions continuous under the staple.

Fig. 3 is a section on the line 3-3, Fig. l, dotted lines showing the central double lift as when split from the body of the cap and bent up to cap extracting position.

F ig. 4 is a section on the line 4.-4, Fig. 2.

rl`he closure disk l, is -ilat and more or less stili and elastic and is designed to snap into the mouth oi' a container, usually having an internal sealing shoulder, to seat on such shoulder to seal the container mouth. Closure disks of this general type are usually known commercially as milk bottleor jar caps, and are composed generally ot' sos called pulp board or paper material that possesses the peculiar quality ot' readily stripping, splitting or separating into plies or layers under certain conditions and manipulations. This peouliarity has been taken advantage of in forming such disks, to pron vide portions thereotl that can he bent up to serve as pull tabs 'for use in extracting the disks rom the container mouths. How ever, to the best of my knowledge and intormation, such disks having tab forming portions integral therewith, have always provided single end or single ply tab portions that when elevated to litt or extracting position were connected at their bases into the edge or peripheral portions of the disks.

l find that under some conditions and 'for certain purposes, it is desirable to provide a paper material closure disk with portions I integral therewith and capable oi being split therefrom and leent up to form a double end or two ply lift rising trom and connected or coupled tothe center of the disk top and composed of two free end tab portions, each relatively thin and in thickness but a minor fraction of the thickness ot the disk, leaving the disk without openings therethrough and of almost full strength and thickness throughout.

ln the particular example shown, the top of the paper material-disk is incised by two relatively shallow approximately U-shape or approximately encircling cuts 2, longitudinally alined with each other diametrically of the disk ltop and meeting, or approximately meeting, at the center of the disk, to outline on the top race oit the disk, an approximately straight elongated panel 2 at its opposite ends terminating short of and spaced from the diametrically opposite edge portions of the disk and at the approximate center of its length crossing the approximate center of the disk. The disk is usually compressed at its top side, at 3', to form top depressions, immediately beyond the extremities of the panel 4, exposing the so-called pick-up vertical end edges 4, of said panel to enable the same to be picked up at its opposite ends, i. e., to ena le the operator by the use of his finger nail to initiate the splitting operation by lifting the opposite free ends of the panel 4.

At the centerof the disk, a Wire staple 5, is located, With its straight top length elongated With respect to the width of the panel and arranged transversely across the top surface thereof and projecting beyond the panel in opposite directions so as to straddle the panel about at the center of the length thereof. This staple is driven down through the disk outside of the panel and beyond the cuts and the ends of the staple are turned up `or clinched at the under surface of the disk. The staple is usually pressed into the surfaces of the disk to avoid the formation of yobjectionable projections at the disk 'surfaces. The staple as shown in the drawings is somewhat exaggerated as to size and projection.

The disk making machine usually imprints the top faces of the disks with the desired indicia, applies andclinches the staples, by suitable blades and punches, incises, or produces the panel outlining cuts and the depressions 3 in the top surfaces of the disks, and cuts out the disks from the paper material web or sheet.

rThe completed disks go on the market flat and smooth at their top and bottom faces (except for any unobjectionable projection of thestaple) with the panel 4 flat and included inthe body of the disk as shown in Figs. 1, 2, and by full lines in Fig. 3, not beingv split or separated even in part from the body of the disk, whereby the disks can be used in the filling and capping machinery of commerce. The vertical cut 2 extends down through the top surface of the disk and enters the body of the disk but a slight distance, usually to a depth equal to much less than one half the thickness of the disk, so that when the panel is split from thedisk to its central portion, first from one end of the panel and then from the other end, two free end approximately very thin tabs can be bent up to form the double end central lift or twin pull tabs 6, indicated by dotted lines liig. 3. A thin top ply of the paper material will split from the body of the disk, leaving the disk strong and imperferate, v/hen the panel ends are stripped from the disk and bent up, and the panel may or may not then completely strip from the body of the disk up to the straddling staple. The staple prevents the separation of the center of the panel from the disk, which would otherwise occur, before or during the disk extracting pull on the double end tab 6. By the location of the straddling staple or equivalent means across the center of the panel, the tabs formed by the panel are strengthened and prevented from completely separating from the disk, and by this arrangement either or both panel ends can be `stripped and bent up to serve as a pull tab Where the ply split from the disk is of suliicient strength to enable one panel end to serve as a pull tab. In the structure shown by Fig. 1, the incision formed by cuts 2 vis not continued across the top surface of the disk covered by the staple but said cuts stop short of the staple.

Fig. 2 shows the incision formed by cuts 2, continuous under the staple, in which even. the incision is made before the staple is applied.

It is evident that various variations might be resorted to without departing from the spirit and scope of m invention and hence I do not wish to limit myself to the exact disclosures hereof.

That I claim is:

1. A paper material closure disk, of the character substantially as described, Without projections at its top and bottom faces, preventing 1ts use in Vcontainer ca ping machinery, said disky having its top ace incised Within the boundaries thereof b a shallow cut forming an elongated panelY formed to be split upwardly from the upper .part of the disk from both ends toward the center of the panel to form a thin double end lift, the disk being provided with means traversing the top face of the central portion of tl panel and extending beyond the same to bind the double end lift to the disk and transmit (tihel extracting pull of the double lift to the 2. A paper material vclosure disk having its top face incised Within the boundaries thereof by a shallow cut forming an elongated panel formed to be split upward] from the u per part of the disk from bot ends tovvar the center of the panel to form a double end lift, means being provided to prevent the center of the panel splitting from the body of the disk.

3. An imperforate paper-material closure disk incised at its top face to form an elongated panel, the center of the length of which is located approximately at the center of the disk, and a staple secured to the disk and transversely1 straddling said panel intermediate its length, said anel formed to split upwardly from the boy of the disk as a thin ply from either end toward the staple to form a double end lift tab.

welpen@ il. pape? materiali closure sk having its top 'fece incsed Within the boundaries thereof ky a shallow cui; oming en elongebed pane omed to be spt upwamly iom bhe uppe' part of the disk from beth ends Iewerd the @enter the panel te 'prm e double eed 11i-t9 and e staple driven hrough and clinched to @he sk and breversng the 'top face of the panel midway its length.

Ein testimony 'whereof have hereunto sef: my hand at Fulton, N. L? this wh dey of November, 1923.

WLBUR WRGHT..

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