US 3184149 A
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Description (OCR text may contain errors)
May 18, 1965 J. P. REPKO RE-SEALABLE BAG 2 Sheets-Sheet 1 Filed Oct. 24, 1962 INVEN TOR.
United States Patent A O 3,184,149 RE-SEALABLE BAG John P. Replro, Parma, Ohio, assignor to The Dow Chemical Company, Midland, Mich, a corporation of Delaware Filed Oct. 24, 1962, Ser. No. 232,677 4 Claims. (Cl. 229-66) This invention relates to a bag assemblage which may be conveniently opened and resealed after initial opening, so that the contents remain in protected condition.
A type of bag assemblage in current useage, especially in the food products field, comprises a plastic type envelope for sliced meat, cheese, etc. Opening means, in the form of pull strings, tapes, or serrated edges, are often incorporated in the bag structure for the convenient opening thereof.
The subject invention represents an improvement in such type of ba assemblage, and more specifically, provides a convenient and effective means for rescaling the bag after opening, so that the contents remain in protected condition. Briefly, the inventive concept involves the provision of an adhesive area on an exterior portion of the bag assemblage, which may be used for maintaining the bag in closed condition after opening. A protective covering is preferably arranged upon the adhesive area, which covering is removed when the adhesive area is to be used for bag rescaling. The bag structure of the invention thus affords a means for maintaining enclosed food products in fresh and useable condition, after initial opening of the bag.
The main object of this invention is to provide an improvement in bag assemblages.
A more specific object is to provide a convenient means for rescaling a bag structure after it has been opened, whereby the contents will remain in protected condition.
A further object is to provide a bag structure which may be rescaled an indefinite number of times after each opening, to afford gradual despensing of the bag contents as desired.
These and further objects and features of the invention will become more apparent from the following description and accompanying drawings wherein:
FIG. 1 is a perspectivedike view of a bag embodying the principles of the invention, with a corner portion of the bag removed;
FIG. 2 is the same but showing a modified embodiment;
FIG. 3 is the same but showing a further modified em bodiment;
FIG. 4 is an exterior view of any one of the bags of FIGS. 1-3, but showing the bag in opened condition;
FIG. 5 is an exterior view of the bag shown in FIG. 4, but showing the bag in reclosed condition; and
FIGS. 6 to 8 are schematic illustrations showing a manner in which the bags of FIGS. 1 to 3 respectively, may be formed.
Referring now to FIG. 1, numeral 10 identifies a bag formed in accordance with the principles of the invention, which bag comprises two sheets of flexible material 12 and 14, sealed about the entire periphery to enclose a product 16 in substantially air tight condition. The material of the bag may be transparent, or translucent, and formed of a polymeric substance, such as polyethylene, polypropylene, polystyrene, vinyl, saran, or rubber hydrochloride, cellophane, paper, and aluminium foil, by way of example. The sealing may be accomplished by heat sealing, or with adhesives, as would be most appropriate for the material of the bag. The construction of the bag may be flexible, semi-rigid, and rigid or any combination; for example, one sheet being relatively rigid, while the other sheet is flexible.
Means for conveniently opening the bag comprise a tear string 13, arranged near one end of the bag and adapted for cutting the sheet 12 along a straight line, when the string is pulled outwardly and across the width of the bag to form an opening line 19. Under certain conditions, it will be obvious that the opening means may be dispensed with.
The structure of the bag, so far described, is similar to bags of the known prior art, and no claim per se is made thereon.
The inventive concept pertains to a convenient means for reclosing the bag after it has been opened, that is, after the tear string 18 has been used. Toward this end, a pressure sensitive tape, or adhesive area 20, is provided along one edge of the bag on the sheet 12, which area may extend across the entire width of the bag, if desired. The adhesive material is the type which retains its adhesive powers even after exposure to atmosphere, and which will stick to another surface merely by application of pressure. A protective covering 22, may be positioned atop the adhesive area, which covering is easily removed when the bag is to be reclosed. As seen in FIG. 5, the upper end of the opened bag has been bent, or folded over, to thus conveniently reclose the bag for protection of the unused products therein. The bag may be subsequently opened and reclosed as desired, by use of the sealing effect provided by the adhesive area 20.
In FIG. 2, a modified form of bag 24 is shown, which differs from the bag 10 only in structural details of the bag, which are not directly concerned with the inventive concept. Bag 24 is formed of a single sheet of material, which is folded and sealed along three sides. A tear tape 28 is arranged near one end of the bag for opening the bag along a line, such as line 19 on a side wall, as is well known to those skilled in the art. An adhesive area 20, with a protective covering 22, is arranged at one end of the bag, near the tear tape 28. Bag 24 is lgscd the same manner as described in connection with In FIG. 3, a further modified bag 30 is shown which is similar to bag 24, except that an inverted fold 32 is provided at the bottom of the bag, and a perforated tear line 34 is provided in one side wall, in lieu of a tear string, or tear tape, as in the case of the first two described embodiments.
In each of the three embodiments, two nicks or notches 36, may be provided adjacent each side of the tear means and at one end thereof, so that the tearing operation may be conveniently initiated.
The manner of forming and filling each of the bags 1%), 24 and 30 is shown schematically in FIGS. 6, 7 and 8 respectively. It is pointed out, that the adhesive area Ed and protective covering 22, may be applied to each bag either prior to content filling, or after, as desired.
It will be seen, that the method of the invention lends itself to utilization on generally standard packaging machinery, with only slight modification being necessary for application of the adhesive area to the bag structure.
It will be seen that the bag assemblage above described, will satisfy the objectives set forth hereinbefore.
The foregoing description has been given in detail without thought of limitation since the inventive principles involved are capable of assuming other forms without departing from the spirit of the invention or the scope of the following claims.
What is claimed is:
1. A sealed bag assemblage, with product therein, said assemblage capable of being opened and of being rescaled after being opened whereby the product therein can be gradually dispensed while the balance will remain in protective condition, comprising a sealed bag having one side comprising a sheet of flexible material having a tear means arranged on said side near one end thereof and adapted for cutting through said side of said bag, and a pressure sensitive adhesive on said side near said end of said bag whereby after use of said tear means, said end of said bag may be folded upon itself and pressure applied to said adhesive to reseal the bag. 7
2. The bag assemblage of claim 1 wherein said pressure sensitive adhesive has a cover removably affixed thereto. 7
3. The bag assemblage of claim 1 wherein said flexible material comprises plastic sheet material.
4. The bag assemblage of claim 1 wherein said cut through one side of said bag is across the entire Width of said bag.
References Cited by the Examiner UNITED STATES PATENTS 2,287,581 6/42 Walker 20619.5 X 2,307,735 1/43 Fehr 229-51 2,429,505 10/47 Ashman. 2,536,773 1/51 Saidel 20641 2,803,574 8/57 Payant 20657 X 2,894,675 7/59 Stein.
' FOREIGN PATENTS 978,420 11/50 France.
1,010,706 3/52 France.
FRANKLIN T. GARRETT, Primary Examiner.
5 EARLE J. DRUMMOND, Examiner.