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Publication numberUS3259235 A
Publication typeGrant
Publication dateJul 5, 1966
Filing dateMar 4, 1964
Priority dateMar 4, 1964
Publication numberUS 3259235 A, US 3259235A, US-A-3259235, US3259235 A, US3259235A
InventorsSowle Ronald E
Original AssigneeVanpak Products Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tearable shrink film cover including integral pull tabs
US 3259235 A
Images(1)
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Description  (OCR text may contain errors)

July 5, 1966 sow 3,259,235

TEARABLE SHRINK FILM COVER INCLUDING INTEGRAL PULL TABS Filed March 4, 1964 Ronald E Sow/e 1N VENTOR.

Mm BY ym, 26m

United States Patent 3,259,235 TEARABLE SHRINK FILM COVER INCLUDING INTEGRAL PULL TABS Ronald E. Sowle, Tomah, Wis., assignor of ninety percent to Vanpak Products, Inc, a corporation of Wisconsin Filed Mar. 4, 1964, Ser. No. 349,371 16 Claims. (Cl. 206-46) This invention relates to a novel and useful tearable shrink film cover and more specifically to a film cover or enclosure for an article including integral pull tabs, the film cover or enclosure being constructed of heat shrinkable film in order that it may be shrunk into tight embracing engagement withthe article enclosed thereby when the enclosure is subjected to heat.

Shrink film covers or enclosures have been utilized for a number of years for packaging articles of irregular configuration. However, the article has heretofore been placed in an enclosure constructed of heat shrinkable film such as a bag and then the assemblage including the bag having the article disposed therein has been heated. The heat causes the heat shrinkable film to contract and to tightly embrace the article disposed therein. While this type of cover or enclosure forms an extremely satisfactory covering in most instances, it is sometimes quite difiicult to remove such a covering inasmuch as it is disposed in tight embracing engagement with the article enclosed thereby. Although a sharp instrument may be utilized to penetrate film covering and to tear the latter so that it may be gripped for pulling from the article, the use of such a sharp implement involves the danger of damaging the article disposed within the closure and is therefore not desirable.

Accordingly, it is the main object of this invention to provide a tearable shrink film cover for articles including at least one integral pull tab whereby the pull tab may be readily grasped by a person wishing to strip the cover from the article, the cover being weakened along lines defining a removable section of said cover on which said pull tab is disposed whereby the removable section may be readily parted from the cover by pulling on the pull tab in order to strip the removable section of the cover from the remainder thereof.

Another object of this invention, in accordance with the immediately preceding object, 'is to provide .a means whereby integral pull tabs may be preformed on a shrink film cover in a simple and inexpensive manner thereby maintaining the cost of the shrink film cover at a minimum.

Another object of this invention is to provide a tearable shrink film cover including pull tabs which may be constructed in a manner so as'to readily adapt the cover for enclosing substantially all shapes of articles.

A final object of this invention to be specifically enumerated herein is to provide a tearable shrink film cover including integral pull tabs which will conform to con ventional forms of manufacture, be of simple construction and easy to remove so as to provide a device that will be economically feasible, long lasting and relatively easy to handle when removing the cover from the article enclosed thereby.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a perspective view of an article enclosed by the tearable shrink film cover of the instant invention which includes integral pulltabs;

FIGURE 2 is an elevational view of the embodiment ice illustrated in FIGURE 1 showing the manner in which the tearable shrink film cover may be readily torn from the article disposed therein;

FIGURE 3 is an enlarged horizontal sectional view taken substantially upon a plane indicated by section line 3-3 of FIGURE 1; and

FIGURE 4 is a perspective view of the shrink film cover of the instant invention showing the manner in which it may be prepared so as to define integral pull tabs before the article to be enclosed thereby is inserted therein and the cover is heated to shrink the cover about the article enclosed thereby.

Referring now more specifically to the drawings, the numeral 10 generally designates the tearable shrink film cover of the instant invention which is illustrated in FIGURE 1 of the drawings tightly enclosing an article referred to in general by the reference numeral 12 including a pair of generally truncated cone-shaped opposite end portions 14 and 16 and a substantially cylindrical portion 18.

With attention now directed more specifically to FIG- UR-E 4 of the drawings, it may be seen that the cover 10 comprises a bag generally referred to by the reference numeral 20 constructed of heat shrinkable film. The bag 20 is open at one end as at 22 and comprises a flattened generally cylindrical member with the opposite flattened end edges of one end of the bag '20 secured together as at 24 in any convient manner such as by thermo-welding.

It will be seen from a comparison of FIGURES 1 and 4 of the drawings that when the article 12 is disposed within the bag 20 that the upper closed end of the bag will define unoccupied portions as at 26 and 28. These unoccupied portions 26 and 28 are flattened previous to the article 12 being inserted into the bag 20 and are coated with a shrink resistant coating 30 which may be of any suitable substance such as varnish, shellac or a pigmented ink which stilfens the shrinkable material and prevents it from shrinking when heated and adhering to another part of the bag 20. The coated portions of the bag 20 define opposite pull tabs 32 and 34. Before the article 12 is inserted in the bag 20, the opposite sides 36 and 38 of the bag 20 are weakened along tear lines 40 and 42, respectively. The tear lines 40 and 42 are defined by aligned longitudinally spaced short cuts formed through the opposite sides 36 and 38. After the bag 20 has been weakened along the tear lines 40 and 42, the article 12 may be inserted in the bag 20 from the open lower end 22 thereof. Thereafter, the assemblage formed by the bag 20 :and the article 12 disposed therein is heated whereupon the non-coated portions of the bag 20 will shrink into tight embracing engagement with the article 12 as illustrated in FIGURE 1 of the drawings. Then, when it is desired to remove the bag or cover 20 from the article 12, the pull tabs 32 and 34 may be grasped as illustrated in FIGURE 2 of the drawings and pulled apart whereupon the cover or bag 20 will tear along the tear lines 40 and 42 and enable the bag 20 to be readily removed from the article '12.

It is to be noted that the coating 30 may have heat conducting properties such that the heat shrinkable and Weldable film disposed therebeneath may be heated to an extent, when the assemblage defined by the bag 10 and the article 12 enclosed thereby is heated, that the inner surfaces thereof will fuse together. In this manner, the pull tabs 32 and 34 will be of stiff two-ply construction with the two-plies of each pull tab being secured together.

Although the bag 20 has been illustrated as being generally rectangular and the article 12 has been illustrated as being in the form of an irregular member thereby enabling the bag 20 to define the unoccupied areas or portions 26 and 28, it is to be understood that the bag 20 would be of irregular configuration if the article 12 were regular in shape whereby the bag 20 would still define at least one unoccupied portion which could be coated to form a pull tab. Further, it is to be understood that the cover may be in the form of a sleeve or any folded or otherwise shaped enclosure and that the pull tabs formed thereon by coating 30 will not adhere to the adjacent portions of the cover 10 as they would if they were not coated when heated.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A shrink film cover including at least one pull tab, said cover comprising an enclosure member constructed of heat shrinkable film and adapted to receive therein an article to be packaged of a size and shape leaving at least one portion of the area enclosed by said closure member unoccupied by said article, at least portions of said closure member defining said one portion being coated with a shrinkage preventing coating adhered to said portions and defining said one pull tab.

2. The combination of claim 1 wherein one pair of sections of the last mentioned portions of said closure member are disposed with their inner surfaces in surfaceto-surface contacting relation with the outer surfaces of said sections being coated with said shrinkage preventing coating.

3. The combination of claim 1 wherein said enclosure member is of a size and shape adapted to define a pair of spaced areas enclosed by said closure member remaining unoccupied by said article, the portions of said enclosure member defining said pair of spaced unoccupied areas of said closure member each being coated with a shrinkage preventing coating adhered thereto and defining a pair of said pull tabs.

4. The combination of claim 1 wherein said enclosure member comprises a bag.

5. The combination of claim 1 wherein said enclosure member isof a size and shape adapted to define a pair of spaced areas enclosed by said closure member remaining unoccupied by said article, the portions of said enclosure member defining said pair of spaced unoccupied areas of said closure member each being coated with a shrinkage preventing coating adhered thereto and defining a pair of said integral pull tabs, said enclosure member comprising a bag, the last mentioned portions of said enclosure member being disposed on opposite sides of said bag.

6. The combination of claim 1 wherein said enclosure member is of a size and shape adapted to define a pair of spaced areas enclosed by said closure member remaining unoccupied by said article, the portions of said enclosure member defining said pair of spaced unoccupied areas of said closure member each being coated with a shrinkage preventing coating adhered thereto and defining a pair of said integral pull tabs, said enclosure member comprising a bag, the last mentioned portions of said enclosure member being disposed on opposite sides of said bag, said bag including means defining a pair of longitudinal tear lines along which said film is structurally weakened, saidtear lines defining a pair of sections of said bag disposed on opposite sides of a plane extending through said bag and in which said tear lines lie, said coated portions of said bag being disposed on corresponding sections.

7. The combination of claim 6 wherein the other coated portions of said bag are disposed on the other of the last mentioned sections.

the area enclosed by said closure member unoccupied, A

p at least portions of said closure member defining said one area being coated with a shrinkage preventing coating adhered thereto and defining said one pull tab.

9. The combination of claim 8 wherein said enclosure member is of a size and shape defining a pair of spaced areas enclosed by said closure member unoccupied by said closure member remaining unoccupied by said article, the portions of said enclosure member defining said pair of spaced unoccupied areas of said closure member each being coated with a shrinkage preventing coating adhered thereto and defining a pair of said integral pull tabs.

10. The combination of claim 9 wherein said closure member comprises a bag and said pull tabs are disposed on opposite sides of the closed end of said bag.

11. The'combination of claim 10 wherein said enclosure member comprises a bag, the last mentioned portions of said enclosure member being disposed on opposite sides of said bag, said bag including means defining a pair of longitudinal tear lines along which said film is structurally weakened, said tear lines defining a pair of sections of said bag disposed on opposite sides of a plane extending through said bag and in which said tear lines lie, said coated portions of said bag being disposed on one of said sections.

12. The method of packaging an article within a heat shrinkable enclosure member of a size and shape defining at least one unoccupied area within said enclosure when said article is disposed therein comprising the following steps: coating at least some of the portions of said enclosure member defining said one occupied area with shrinkage preventing coating in a manner such that the coating adheres to said some portions, and heating said enclosure member to shrink all of said enclosure member excepting the coated portions thereof tightly about said article.

13. The method of claim 12 including the step of coating portions of said enclosure member defining a second unoccupied area within said enclosure with shrinkage preventing coating before said step of heating said enclosure member.

14. The method of claim 12 including the step of weakening said closure member along a line passing between the first and second mentioned areas before said closure member is heated.

15. The method of packaging an article within a heat shrinkable enclosure member of a size and shape defining at least one unoccupied area within said enclosure when said article is disposed therein comprising the following steps: coating at least some of the portions of said enclosure member defining said one occupied area with a shrinkage preventing coating in a manner such that the coating adheres to said some portions, inserting said article in said closure member, and heating said enclosure member to shrink all of said enclosure member excepting the coated portions thereof tightly about said article.

16. The method of claim 15 including the step of defining a second unocupied area within said enclosure and coating at least some of the portions of said enclosure member defining said second unoccupied area with a shrinkage preventing coating before said step of heating said enclosure member, weakening said closure member along a line passing between the first and second mentioned areas before said article is inserted in said-closure member.

(References on following page) 5 6 References Cited by the Examiner 2,912,102 11/ 1959 Scott 206-56 2,967,383 1/1961 Rumsey 53-14 UNITED STATES PATENTS 2 974 370 3 19 1 Baird- 2,189,174 2/1940 Hohl 229 53 3,124,242 3/ 1964 Gottily 206-46 2,554,841 5/1951 Rumsey 206-4533 5 S yder E. P) lmary Ex mi r. 2,835,433 5/ 1958 Swartz et a1 229-3 .5 GEORGE O. RALSTON, LOUIS G. MANCENE, 2,862,614 12/ 195 8 Battista 206-64 Examiners.

2,897,087 7/1959 Lawlor 229-51 W. T. DIXSON, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2189174 *Dec 30, 1936Feb 6, 1940Owens Illinois Glass CoContainer
US2554841 *Jul 13, 1948May 29, 1951Rumsey Jr HerbertPackage
US2790286 *May 11, 1953Apr 30, 1957Goodyear Tire & RubberSecondary closures
US2835433 *Apr 12, 1955May 20, 1958Wingfoot CorpBag closures
US2862614 *Apr 28, 1954Dec 2, 1958American Viscose CorpWrapper for wound filamentary packages
US2897087 *Mar 5, 1956Jul 28, 1959Tee Pak IncFood package
US2912102 *Jul 29, 1958Nov 10, 1959Soo Valley CompanyPackage for fishing line
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US2974370 *Jan 14, 1959Mar 14, 1961Grace W R & CoCopies and method for making the same
US3124242 *Nov 21, 1960Mar 10, 1964 Yarn shipping package
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3321073 *Sep 13, 1965May 23, 1967Bemberg AgCop package
US4031832 *Mar 26, 1976Jun 28, 1977Illinois Tool Works Inc.Planting system
US4091632 *Jan 27, 1976May 30, 1978Marchewka Richard BBeverage cooling device having consumable foodstuff therein
US4480751 *Dec 30, 1983Nov 6, 1984Haemonetics CorporationApparatus for collecting, storing and dispensing frozen blood plasma
US4664263 *Jun 24, 1985May 12, 1987Minnesota Mining And Manufacturing CompanyDivisible tape tab for opening a container
US4708249 *Feb 24, 1987Nov 24, 1987Minnesota Mining And Manufacturing CompanyTwo part tape tab for opening a container
US4777054 *Nov 6, 1986Oct 11, 1988Perfect Holdings, Ltd.Easy open package
US4784273 *Aug 6, 1987Nov 15, 1988Walter NiemetzSingle serving container for tortes or the like
US4903843 *Mar 22, 1988Feb 27, 1990Folien Fischer AgFoil sheath for objects, especially packages of goods
US4971197 *Dec 6, 1989Nov 20, 1990Eveready Battery Company, Inc.Polyvinyl chloride shrinkage wrapping of batteries
US5074415 *Mar 5, 1991Dec 24, 1991Halpak Plastics, Inc.Safetly sealed, tamper evidencing; ultrasonic welding to remove all trapped air; noncontanination
US5127065 *Apr 17, 1990Jun 30, 1992Wade Steven EOpening device for flexible packaging
US5378066 *May 28, 1993Jan 3, 1995Greenbrier Innovations, Inc.Opening device for flexible packaging
US5765682 *Jun 24, 1996Jun 16, 1998Menlo Care, Inc.Restrictive package for expandable or shape memory medical devices and method of preventing premature change of same
US5893460 *Oct 19, 1994Apr 13, 1999Halpak Plastics, Inc.Shrinkable tubing with integral tear strip
US6045641 *Nov 6, 1998Apr 4, 2000Halpak Plastics, Inc.Method of manufacturing shrinkable tubing with integral tear strip
US7866537 *Jun 27, 2007Jan 11, 2011Duhon David TEasy-open wrapper
US8684175 *Sep 22, 2006Apr 1, 2014Covidien LpMethod for shipping and protecting an endotracheal tube with an inflated cuff
DE2440666A1 *Aug 24, 1974Mar 11, 1976Teijin LtdEine mehrzahl von garnpackungen aufnehmende einheitspackung, verfahren zu ihrer herstellung und vorrichtung zur durchfuehrung des verfahrens
EP2730515A1 *Nov 5, 2013May 14, 2014Krones AktiengesellschaftShrink packaging and device and method for producing the same
Classifications
U.S. Classification206/497, 346/33.00R, 229/87.5, 383/209, 206/410
International ClassificationB65D75/52, B65D75/58, B65D75/00
Cooperative ClassificationB65D75/5827, B65D75/002
European ClassificationB65D75/00B, B65D75/58E