US 3908857 A
A tape seal end closure for closing pour openings in the end panel of a container. The tape is of rectangular configuration applied to a round end panel and to cover all of the openings extends to an area proximate the circular peripheral seaming chuck guide groove in the end panel. The tape is provided with a ring pull which is folded over the tape and forms corners with the body portion of the tape at its lateral edges. These corners, when the body portion is positioned to adequately cover all of the pour openings in the end panel project over and encroach upon the chuck guide groove since the proximate edge of the body portion of the tape extends chordally with respect to the groove. Cutting off these corners develops notches which concentrate failure - promoting stresses causing the tape to tear and thus frustrating opening of the container. The invention solves the problem by providing novel dart folds in these corners which clear the groove and which unfold when the ring pull is lifted thereby developing the full strength of the tape.
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Description (OCR text may contain errors)
United States Patent [19 Chiappe BEST AVAILABLE CQPY 51 Sept. 30, 1975 1 1 TAPE SEAL FOR CONTAINER  Inventor: Wayne Chiappe, Hinsdale, Ill.
 Assignee: Continental Can Company, Inc.,
New York, N.Y.
 Filed: Oct. 15, 1974 211 App]. Not: 514,703
US. Cl. 220/359; 220/260; 222/485;
Primary E.\'aminerGeorge T. Hall Attorney, Agent, or FirmJohn .l. Kowalik; Joseph E. Kerwin; William A. Dittmann  ABSTRACT A tape seal end closure for closing pour openings in the end panel of a container. The tape is of rectangular configuration applied to a round end panel and to cover all of the openings extends to an area proximate the circular peripheral seaming chuck guide groove in the end panel. The tape is provided with a ring pull which is folded over the tape and forms corners with the body portion of the tape at its lateral edges. These corners, when the body portion is positioned to adequately cover all of the pour openings in the end panel project over and encroach upon the chuck guide groove since the proximate edge of the body portion of the tape extends chordally with respect to the groove. Cutting off these corners develops notches which concentrate failure promoting stresses causing the tape to tear and thus frustrating opening of the container. The invention solves the problem by providing novel dart folds in these corners which clear the groove and which unfold when the ring pull is lifted thereby developing the full strength of the tape.
10 Claims, 7 Drawing Figures U..S. Patent Sept. 30,1975
TAPE SEAL FOR CONTAINER DISCUSSION ,OF THE PRIQR ART.
I Indevices utilizing tapes for closi'ng the pour openings, the tape is usually secured by pressure sensitive adhesives. In closing pressured beverages sueh asb'eer or soft drinks, pressure sensitivetapesj have'not been successful and-even heat sealed-tapeshave more or less consistently failed-Th'e-problem atwleast-partially resided in having a single openingdefming thetpour: aper ture whichhas to be placed close to the. rim orsse'am'of the can thus minimizing the areato which-the adhesive is applied and concurrently.limiting -the area ,of tape which can-be:adhered; since thetape has to clear the chuck guide groove. I Q
SUMMARY-OF THE INVENTIONfff Q This invention is directed to tapeseal for. the pour opening of a container foripressurized beverages. y
A general object of the invention is to provide a novel tape having a rectangular body which is applied diametrically across the top of the round end panel in closing relation to the pour aperture and which has a ringpull portion at one end folded over the body portion and wherein sufficient surface areas of the end panel and body tape are securely adhered particularly in the location between the edge of the pour opening and the chuck guide groove.
The invention contemplates providing a tape of sufficient width not only to cover the pour aperture comprising multiple selectively arranged holes to minimize pressure on the tape, but also to provide an extensive sealed sanitary area maintained free of contamination and providing a ring pull end portion of adequate size to admit the finger of most users.
A further object is to provide a tape which has a rectangular body with edge hems along its longitudinal edges to increase its tensile as well as tear or shear strength and of adequate width to form a ring pull at one end of the same diametrical dimension as the width of the body, so that the tape may be easily fed through and fabricated in suitable tape making equipment.
The invention comprehends providing a wide rectangular tape which intermediate its lateral edge is secured to the end panel close to the chuck guide by a novel folding of the corners of the tape formed by the juncture of the body and ring pull end portion, the corners being folded away to a nonobstructing position and unfolding during opening of the tab to provide an uninterrupted full width of tape from end to end.
These and other objects and advantages inherent in and encompassed by the invention will become more readily apparent from the specification and drawings, wherein:
FIG. 1 is a top perspective view of the structure incorporating the invention;
FIG. 2 is a top plan view of the structure showing the tab in folded portion;
FIG. 3 is a top plan view of the structure showing the tab in unfolded position preparatory to opening of the container;
FIG. 4 is an enlarged cross-section on line 4 of FIG.
FIG. 5 is a top view of a partially formed tape;
FIG. 6 is a top view of a formed tape with the folds between the ring pull end portion and body portion of the tape partially formed; and
21 7 is a cross sec'tionafview taken sii'bstantially on li 7...? f I I j x; DESCRIPTION OFT-HE lN\ ENTlON--" The"inve ntio'n is disclosed in association with aican or co r'it'ainer2'havingja cylind'rical body 3, an 'end member 4 including a central flat panel portion 5 circumscribed by an annular chuck guiding groove 6 and a chuck wall 7 which is double seamed at 8 with the The panel is provided with a pour aperture'generally designated 10 including a plurality of geometrically arranged openings 11,12 which'e xtend from tlie peripheral edge 13 of the panel 5 inwardly.
' A tapellS ofa 'nietalfoil and plastic such as polypropylene isused as a closure for the openings. The specific detailsofsuch closure are disclosed in US. application Ser. No..50 7 ,03 6 filed, in the same names of Jos eph Kerwin e t al.,ron Sept. 1 8, 1974 and the disclosure therein ishereinincorporatedby reference. I
Suffice it it) say th at the tape is secured by an adhesive to the can top 17 as in the aforesaid application for patent.
The tape herein shown is of a laminate metal foil and plastic and of substantial width and covers the area designated 19 (FIG. 3) on the can top. The tape comprises a rectangular body portion 20 and at one end has an integral finger-grip portion 21 which is folded over the body portion in a fold bend juncture 23 transverse to the longitudinal extent of the tab.
As best seen in FIG. 2 the ends of the bend juncture 23 form right angle corner portions 24, 24 shown (shown in phantom lines in FIG. 2) which would normally project over and encroach upon the chuck guide groove.
A feature of the present invention is the provision of dart folds 25, 25 tucking in the corner portions 24, 24
between the pull ring portion and the body portion of the tab.
Each dart fold has upper and lower triangular dart sections 26, 27 which converge inwardly from the respective lateral edges 28, 29 of the tape and these sections 26, 27 have a fold juncture 30 which merges into an apical point 31 which coincides with the bend line 32 of the juncture 23. It will be noted that the corners 24, 24 at the bend line are folded so that the outer edges clear the guide groove and at these outer edges 33 are preferably 45 to the bend line and adjacent lateral edge of the body of the tape. This angle, however, is not critical and may be of any magnitude which will clear the groove.
It will be observed from FIG. 3 that upon the ring pull portion being lifted the dart folds will unfold and the full width of the tape connects the ring panel portion with the body portion.
The ring pull portion has a circular hem edge 35 and a center finger-admitting opening 36 which also has a hem edge 37.
1. A closure for a container end member having a center panel portion and a peripheral chuck wall and a chuck-receiving annular groove in the panel adjacent the chuck wall and having pour opening means disposed in close proximity to said groove;
a tape of rectangular shape having a body portion and a finger-grip lift portion folded over the body portion and forming a fold edge at one end of the body portion and corners therewith at the lateral edges thereof;
means removably connecting said body portion to said center panel portion in a position disposing said folded edge proximate to said chuck wall chordally with respect to said groove and locating said corners in overlapping relation to the groove,
said corners being folded inwardly from said lateral edges to clear said groove.
2. The invention according to claim 1 and said corners being formed as folds disposed between said body and finger-grip portions.
3. The invention according to claim 2 and said folds being in the form of darts.
4. The invention according to claim 3 and said folds having a pair of opposing triangular shaped sections grip portion.
6. A tape closure for a pour opening of a container comprising a rectangular body portion and a folded over end portion forming corners therewith at the lateral edges of the tape, said corners being folded inwardly of respective lateral edges and tucked in between said body portion and end portion.
. 7. The invention according to claim 6 and said corners including sections of both portions of the tape forming opposed fold plies.
8. The invention according to claim 7 and said fold plies being of triangular shape. 7
9. The invention according to claim 8 and said body and end portions forming a fold edge transverse to the lateral edges and said plies forming edges diagonally subtending the fold edge and respective lateral edges.
10. The invention according to claim 9 and said edges of the plies disposed at approximately 45 to said fold edge and respective lateral edge.