US3307773A - Readily closable and reopenable plastic bag - Google Patents
Readily closable and reopenable plastic bag Download PDFInfo
- Publication number
- US3307773A US3307773A US268117A US26811763A US3307773A US 3307773 A US3307773 A US 3307773A US 268117 A US268117 A US 268117A US 26811763 A US26811763 A US 26811763A US 3307773 A US3307773 A US 3307773A
- Authority
- US
- United States
- Prior art keywords
- wall
- bag
- flap
- reopenable
- open end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
- B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S229/00—Envelopes, wrappers, and paperboard boxes
- Y10S229/938—Sandwich holder
Definitions
- the liquid 16 may be coated on the bag in an undiluted form, or may be first diluted in a volatile solvent, such as ethanol, methanol, water, and the like, and then coated on the bag.
- a volatile solvent such as ethanol, methanol, water, and the like
- Preferred coating methods include spraying, roller or brush coating, and doctor blading, but any suitable technique, such as compounding the liquid 16 with the plastic material before making the plastic film or bag, may be employed.
- liquid 16 If the liquid 16 is compounded with the plastic material, it will migrate to the surface of the plastic to form a liquid film thereon. Undiluted liquid has been successfully used in the coating methods as well as 2, 2.5, 4, 5, l0, and 20 percent concentrations by volume in ethanol. In any event, a thin film of the liquid 16 must be present on the bag at the appropriate places. The thin film must be thick enough to achieve sufiicient cling but preferably not so thick as to appear unsightly or to feel undesirably sticky to one who handles the bag. Between about 50 and about 800 milligrams of the liquid 16 per square meter of plastic material has been found to be satisfactory.
- the invention provides a readily closable and reopenable bag, and eliminates the need for separate closure means for plastic bags or inconvenient adhesives which permanently bond one material to another.
- liquid as used herein means a material or mixture of materials which will by its inherent nature without the aid of solvents flow at 25 C. but which does not diffuse and fill any container virtually uniformly in which it is put, as a gas will do.
- substantially nonvolatile, high viscosity liquid as used herein means a liquid which evaporates very slowly at room temperatures and pressures, thus being relatively permanent when exposed under ordinary conditions, and which resists flow to a greater extent than materials such as water, ethylene glycol, and 98 percent sulfuric acid, which have viscosities less than about 25 centipoises at 25 C. In general, this term means a liquid having a vapor pressure at 25 C. below about 20 millimeters of mercury and 'a viscosity at 25 C. above about 25 centipoises.
- liquid cling agent in accordance with the invention is to be contrasted with adhesive materials which must be wet with water or other solvents before they can be used as 'an adhesive and which almost always produce a permanent bond after drying again, i.e., a bond which can be broken only with great difficulty and usually by harming the bonded materials or the adhesive.
- a readily closable and reopenable bag made of a flexible plastic material; said bag having a first wall and opposite said first wall a second wall, an open end between said first and second walls, and a flap extending from said first wall for folding over said open end and against said second wall, thereby closing said open end; and said bag having a thin film thereon, on at least one surface which exists between said flap and said second wall when said flap is folded over, consisting essentially of from 54 to about 59% by weight of a monoglyceride selected from the group consisting of glycerol monostearate and glycerol monooleate, not more than 0.5% by weight oleic acid, and the remainder diglycerides and propylene glycol; said film causing said flap to cling to said second wall when said flap is folded over.
- a monoglyceride selected from the group consisting of glycerol monostearate and glycerol monooleate, not more than 0.5% by weight oleic acid, and
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Air Bags (AREA)
- Refuse Receptacles (AREA)
- Bag Frames (AREA)
- Paints Or Removers (AREA)
Description
MAE-Mb 3957 J. c. KRATZER ETAL 3,30%??3 READILY CLOSABLE AND REOPENABLE PLASTIC BAG Filed March 26, 1963 INVENTORS JAMES C. KRATZER PETER WILTON 3 Specific gravityabout 0.96 at 25 C. Moisture contentnot more than 0.5% by weight Total monoglycerides (a and [3 forms) about 54 to about 59% by weight Free fatty acid (as oleic)-not more than 0.5% Remainder-principal1y, diglycerides and propylene glycol with less than 1 percent by weight preservatives The liquid 16 may be coated on the bag in an undiluted form, or may be first diluted in a volatile solvent, such as ethanol, methanol, water, and the like, and then coated on the bag. Preferred coating methods include spraying, roller or brush coating, and doctor blading, but any suitable technique, such as compounding the liquid 16 with the plastic material before making the plastic film or bag, may be employed. If the liquid 16 is compounded with the plastic material, it will migrate to the surface of the plastic to form a liquid film thereon. Undiluted liquid has been successfully used in the coating methods as well as 2, 2.5, 4, 5, l0, and 20 percent concentrations by volume in ethanol. In any event, a thin film of the liquid 16 must be present on the bag at the appropriate places. The thin film must be thick enough to achieve sufiicient cling but preferably not so thick as to appear unsightly or to feel undesirably sticky to one who handles the bag. Between about 50 and about 800 milligrams of the liquid 16 per square meter of plastic material has been found to be satisfactory.
Several bags made in accordance with the invention have been tested, with glycerol monooleate as the liquid cling agent in most cases. The bags were of a size suitable for sandwiches, and when the flap was folded over to close the bag, the closure was sufficiently positive and strong to permit liberal handling without causing the bag to open. In fact, the bag with its contents was vigorously shaken without a loosening of the flap from the bag wall. The bag can be opened, however, merely by pulling up a corner of the flap and continuing the action until the flap is loose. In addition, the bag may be closed and opened a number of times without harming the bag or the cling agent. Thus, the invention provides a readily closable and reopenable bag, and eliminates the need for separate closure means for plastic bags or inconvenient adhesives which permanently bond one material to another.
The term liquid as used herein means a material or mixture of materials which will by its inherent nature without the aid of solvents flow at 25 C. but which does not diffuse and fill any container virtually uniformly in which it is put, as a gas will do. The term substantially nonvolatile, high viscosity liquid as used herein means a liquid which evaporates very slowly at room temperatures and pressures, thus being relatively permanent when exposed under ordinary conditions, and which resists flow to a greater extent than materials such as water, ethylene glycol, and 98 percent sulfuric acid, which have viscosities less than about 25 centipoises at 25 C. In general, this term means a liquid having a vapor pressure at 25 C. below about 20 millimeters of mercury and 'a viscosity at 25 C. above about 25 centipoises.
The liquid cling agent in accordance with the invention is to be contrasted with adhesive materials which must be wet with water or other solvents before they can be used as 'an adhesive and which almost always produce a permanent bond after drying again, i.e., a bond which can be broken only with great difficulty and usually by harming the bonded materials or the adhesive.
What is claimed is:
1. A readily closable and reopenable bag made of a flexible plastic material; said bag having a first wall and opposite said first wall a second wall, an open end between said first and second walls, and a flap extending from said first wall for folding over said open end and against said second wall, thereby closing said open end; and said bag having a thin film thereon, on at least one surface which exists between said flap and said second wall when said flap is folded over, consisting essentially of from 54 to about 59% by weight of a monoglyceride selected from the group consisting of glycerol monostearate and glycerol monooleate, not more than 0.5% by weight oleic acid, and the remainder diglycerides and propylene glycol; said film causing said flap to cling to said second wall when said flap is folded over.
2. The bag as defined in claim 1 wherein said liquid has a vapor pressure at 25 C. between about 0.01 and about 10 millimeters of mercury and a viscosity at 25 C. between about and about 250 centipoises.
3. The bag as defined in claim 1 wherein the monoglyceride is glycerol monooleate.
References Cited by the Examiner UNITED STATES PATENTS 1,800,143 4/1931 Hughes 229-48 2,496,934 2/1950 Carson 117-122 XR 2,790,732 4/1957 McGarry et a1. 117-122 2,949,370 8/1960 Hughes 99173 2,970,920 2/1961 Forkner 99-172 XR 3,052,566 9/1962 Smith 117-122 XR 3,070,280 12/1962 Richmond 22962 ALEXANDER H. BRODMERKEL, Primary Examiner. S. H. BLECH, F. T. GARRETT, Examiners. D. M. BOCKENEK, J. EVANS, Assistant Examiners.
Claims (1)
1. A READILY CLOSABLE AND REOPENABLE BAG MADE OF A FLEXIBLE PLASTIC MATERIAL; SAID BAG HAVING A FIRST WALL AND OPPOSITE SAID FIRST WALL A SECOND WALL, AN OPEN END BETWEEN SAID FIRST AND SECOND WALLS, AND A FLAP EXTENDING FROM SAID FIRST WALL FOR FOLDING OVER SAID OPEN END AND AGAINST SAID SECOND WALL, THEREBY CLOSING SAID OPEN END; AND SAID BAG HAVING A THIN FILM THEREON, ON AT LEAST ONE SURFACE WHICH EXISTS BETWEEN SAID FLAP AND SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER, CONSISTING ESSENTIALLY OF FROM 54 TO ABOUT 59% BY WEIGHT OF A MONOGLYCERIDE SELECTED FROM THE GROUP CONSISTING OF GLYCEROL MONOSTEARATE AND GLYCEROL MONOOLEATE, NOT MORE THAN 0.5% BY WEIGHT OLEIC ACID, AND THE REMAINDER DIGLYCERIDES AND PROPYLENE GLYCOL; SAID FILM CAUSING SAID FLAP TO CLING TO SAID SECOND WALL WHEN SAID FLAP IS FOLDED OVER.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US268117A US3307773A (en) | 1963-03-26 | 1963-03-26 | Readily closable and reopenable plastic bag |
BE645245D BE645245A (en) | 1963-03-26 | 1964-03-16 | |
NL6402897A NL6402897A (en) | 1963-03-26 | 1964-03-18 | |
LU45691D LU45691A1 (en) | 1963-03-26 | 1964-03-18 | |
CH377464A CH403610A (en) | 1963-03-26 | 1964-03-24 | Bag |
GB12535/64A GB1044395A (en) | 1963-03-26 | 1964-03-25 | Improvements in or relating to bags |
DE19641486689 DE1486689B1 (en) | 1963-03-26 | 1964-03-26 | Repeatable closure on a flexible plastic bag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US268117A US3307773A (en) | 1963-03-26 | 1963-03-26 | Readily closable and reopenable plastic bag |
Publications (1)
Publication Number | Publication Date |
---|---|
US3307773A true US3307773A (en) | 1967-03-07 |
Family
ID=23021534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US268117A Expired - Lifetime US3307773A (en) | 1963-03-26 | 1963-03-26 | Readily closable and reopenable plastic bag |
Country Status (7)
Country | Link |
---|---|
US (1) | US3307773A (en) |
BE (1) | BE645245A (en) |
CH (1) | CH403610A (en) |
DE (1) | DE1486689B1 (en) |
GB (1) | GB1044395A (en) |
LU (1) | LU45691A1 (en) |
NL (1) | NL6402897A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3655118A (en) * | 1970-06-15 | 1972-04-11 | American Velcro Inc | Flexible mouth container |
US3680768A (en) * | 1970-08-12 | 1972-08-01 | Cellu Craft Inc | Plastic bag with integral pouch and method for making same |
US3973567A (en) * | 1975-05-19 | 1976-08-10 | Personal Products Company | Wrapped sanitary napkins |
US4034118A (en) * | 1976-01-05 | 1977-07-05 | Martin Fred A | Method of sweetening or mellowing onions |
US4287920A (en) * | 1977-10-17 | 1981-09-08 | Johnson Jr Glenn W | Self-sealing valve |
US4483018A (en) * | 1981-02-09 | 1984-11-13 | Impakt Products, Inc. | High integrity tamper resistant container |
US4612221A (en) * | 1983-11-16 | 1986-09-16 | Union Carbide Corporation | Multilayer food wrap with cling |
US4905298A (en) * | 1988-12-12 | 1990-02-27 | Walor Curtis J | Resealable closure |
US20030230028A1 (en) * | 2002-04-12 | 2003-12-18 | Weder Donald E. | Decorative floral sleeve |
US20040031195A1 (en) * | 2002-04-12 | 2004-02-19 | Weder Donald E. | Method of using a decorative floral sleeve |
US20100151166A1 (en) * | 2008-12-12 | 2010-06-17 | Eva Almenar | Micro-perforated poly(lactic) acid packaging systems and method of preparation thereof |
US20110235949A1 (en) * | 2010-03-28 | 2011-09-29 | Miba Plast Ltd. | Multi-use disposable food bag |
EP3663222A1 (en) * | 2018-12-07 | 2020-06-10 | Stine Dalberg | Closable food packing |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4502599A (en) * | 1984-04-02 | 1985-03-05 | Minnesota Mining And Manufacturing Company | Package and method of packaging resealable plastic bags |
ES2037252T3 (en) * | 1988-01-04 | 1993-06-16 | The Wiggins Teape Group Limited | A CARDBOARD BOX COMBINED WITH A PILE OF PAPER. |
ES2288316T3 (en) * | 1998-07-08 | 2008-01-01 | Flexipol Packaging Limited | EASY OPENING STRUCTURE BAG. |
GB2360271B (en) * | 1998-07-08 | 2002-09-11 | Flexipol Packaging Ltd | Bags of easy open construction |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1800143A (en) * | 1928-10-29 | 1931-04-07 | James C Hughes | Sealing medium |
US2496934A (en) * | 1945-10-26 | 1950-02-07 | Wingfoot Corp | Adhesive |
US2790732A (en) * | 1949-04-29 | 1957-04-30 | Ind Tape Corp | Adhesive sheet containing specific mass deactivators |
US2949370A (en) * | 1957-09-23 | 1960-08-16 | Ree Ceel Corp | Package |
US2970920A (en) * | 1957-12-19 | 1961-02-07 | Forkner John Hood | Food package |
US3052566A (en) * | 1959-11-20 | 1962-09-04 | Johnson & Johnson | Pressure sensitive adhesive tape having a release coating of fatty alcohol itaconate |
US3070280A (en) * | 1960-06-09 | 1962-12-25 | Richmond Paper Company | Self-sealing envelopes |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE635265C (en) * | 1935-01-27 | 1936-09-14 | Jagenberg Werke Ag | Device for applying glue or the like in places on workpieces made of paper, cardboard, cardboard or similar material |
AT194774B (en) * | 1956-02-28 | 1958-01-10 | Rigot-Stalars Fils | Bag closure |
AT199558B (en) * | 1957-04-16 | 1958-09-10 | Alfred Dr Labek | Bag closure |
DE1856948U (en) * | 1962-06-30 | 1962-08-16 | Agfa Ag | NOVEL CLOSURE FOR BAGS. |
-
1963
- 1963-03-26 US US268117A patent/US3307773A/en not_active Expired - Lifetime
-
1964
- 1964-03-16 BE BE645245D patent/BE645245A/xx unknown
- 1964-03-18 LU LU45691D patent/LU45691A1/xx unknown
- 1964-03-18 NL NL6402897A patent/NL6402897A/xx unknown
- 1964-03-24 CH CH377464A patent/CH403610A/en unknown
- 1964-03-25 GB GB12535/64A patent/GB1044395A/en not_active Expired
- 1964-03-26 DE DE19641486689 patent/DE1486689B1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1800143A (en) * | 1928-10-29 | 1931-04-07 | James C Hughes | Sealing medium |
US2496934A (en) * | 1945-10-26 | 1950-02-07 | Wingfoot Corp | Adhesive |
US2790732A (en) * | 1949-04-29 | 1957-04-30 | Ind Tape Corp | Adhesive sheet containing specific mass deactivators |
US2949370A (en) * | 1957-09-23 | 1960-08-16 | Ree Ceel Corp | Package |
US2970920A (en) * | 1957-12-19 | 1961-02-07 | Forkner John Hood | Food package |
US3052566A (en) * | 1959-11-20 | 1962-09-04 | Johnson & Johnson | Pressure sensitive adhesive tape having a release coating of fatty alcohol itaconate |
US3070280A (en) * | 1960-06-09 | 1962-12-25 | Richmond Paper Company | Self-sealing envelopes |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3655118A (en) * | 1970-06-15 | 1972-04-11 | American Velcro Inc | Flexible mouth container |
US3680768A (en) * | 1970-08-12 | 1972-08-01 | Cellu Craft Inc | Plastic bag with integral pouch and method for making same |
US3973567A (en) * | 1975-05-19 | 1976-08-10 | Personal Products Company | Wrapped sanitary napkins |
US4034118A (en) * | 1976-01-05 | 1977-07-05 | Martin Fred A | Method of sweetening or mellowing onions |
US4287920A (en) * | 1977-10-17 | 1981-09-08 | Johnson Jr Glenn W | Self-sealing valve |
US4483018A (en) * | 1981-02-09 | 1984-11-13 | Impakt Products, Inc. | High integrity tamper resistant container |
US4612221A (en) * | 1983-11-16 | 1986-09-16 | Union Carbide Corporation | Multilayer food wrap with cling |
US4905298A (en) * | 1988-12-12 | 1990-02-27 | Walor Curtis J | Resealable closure |
WO1990006887A1 (en) * | 1988-12-12 | 1990-06-28 | Walor Curtis J | Resealable closure |
US20030230028A1 (en) * | 2002-04-12 | 2003-12-18 | Weder Donald E. | Decorative floral sleeve |
US20040031195A1 (en) * | 2002-04-12 | 2004-02-19 | Weder Donald E. | Method of using a decorative floral sleeve |
US20100151166A1 (en) * | 2008-12-12 | 2010-06-17 | Eva Almenar | Micro-perforated poly(lactic) acid packaging systems and method of preparation thereof |
US20110235949A1 (en) * | 2010-03-28 | 2011-09-29 | Miba Plast Ltd. | Multi-use disposable food bag |
EP3663222A1 (en) * | 2018-12-07 | 2020-06-10 | Stine Dalberg | Closable food packing |
Also Published As
Publication number | Publication date |
---|---|
LU45691A1 (en) | 1964-05-19 |
NL6402897A (en) | 1964-09-28 |
CH403610A (en) | 1965-11-30 |
GB1044395A (en) | 1966-09-28 |
BE645245A (en) | 1964-07-16 |
DE1486689B1 (en) | 1971-04-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3307773A (en) | Readily closable and reopenable plastic bag | |
US3070280A (en) | Self-sealing envelopes | |
DE69209507T2 (en) | DISPOSABLE PACKAGING FOR DAMP PAPER TOWELS AND METHOD FOR THE PRODUCTION THEREOF | |
US3549066A (en) | Dispensing carton | |
US3310225A (en) | Resealable container closure from self-adherent chlorinated olefin polymer films | |
US2720881A (en) | Closure | |
US3565328A (en) | Multiwall pinch closure bag with opening feature | |
US3942634A (en) | Two compartment sterilant package | |
US3596828A (en) | Flexible pouches and bags | |
US3412926A (en) | Bag and closure therefor | |
US2430046A (en) | Collapsible tube | |
GB1087437A (en) | Container and lid | |
US3511746A (en) | Easy opening heat sealed package | |
US2714562A (en) | Self-sealing wrapping material | |
US2922568A (en) | Package for tobacco or the like | |
US1987545A (en) | Paper container for fruit wrap | |
US8752730B2 (en) | Viscous material selective packet method | |
US2268611A (en) | Process of laminating | |
DE1138665B (en) | Packaging film consisting of thermoplastic polymers, preferably polyethylene or polyterephthalic acid glycol ester, with a firmly adhering coating of organic film-forming agents | |
US2176584A (en) | Method of forming a seam | |
US4130198A (en) | Multi-part liquid container | |
US2163228A (en) | Soap package | |
US2308527A (en) | Container and wrapper for articles of manufacture and commerce | |
US3099593A (en) | Method of packaging and applying wall tile and wall panel adhesive | |
US3428516A (en) | Heat activated peelable resealable labels for closures |