US3889872A - Plastic bag having tightening band - Google Patents

Plastic bag having tightening band Download PDF

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Publication number
US3889872A
US3889872A US388190A US38819073A US3889872A US 3889872 A US3889872 A US 3889872A US 388190 A US388190 A US 388190A US 38819073 A US38819073 A US 38819073A US 3889872 A US3889872 A US 3889872A
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Prior art keywords
bag
band
plastic
retention member
points
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Expired - Lifetime
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US388190A
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Spencer B T Lin
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Priority to US388190A priority Critical patent/US3889872A/en
Priority to IN2199/CAL/1973A priority patent/IN140370B/en
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    • 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
    • B65D33/1616—Elements constricting the neck of the bag
    • B65D33/165—Flexible elongated elements integral with or attached to bags or sacks ; Fastening thereof to the bag before closing
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/15—Bag fasteners
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/15—Bag fasteners
    • Y10T24/153—Plastic band bag tie

Definitions

  • ABSTRACT A plastic bag comprising a bag body, at least one retention member which is formed close to the bag opening by hot sealing a plastic sheet or film at least at two points on said bag body in order to provide a passage between the said two adjacent points, and an endless band movably retained in said passage.
  • the bag can be tightened simply by self-fastening the said band.
  • the present invention relates to a plastic bag, and more particularly. to a plastic bag which utilizes an endless band, passing through a retention member which is formed by hot sealing a plastic sheet or film on said bag, to tighten the bag opening by self-fastening.
  • Plastic bags have been widely used for packing purposes. Especially. the polyethylene bag has various advantages, such as a neat appearance, transparent. nontoxic, low cost, impermeable to water etc. so that it is more suitable to be used for packing foods, such as vegetables, fruits, fishes and meals etc. and has become an indispensable packing material used in the market or store.
  • the so called union bag provides a tongue and groove structure along the entire transverse length near the bag opening. It simply needs a slight pressure to be applied on the portion of the said tongue anti groove structure to connect them, so as to readily tighten the opening.
  • This tightening operation is quite simple, but the production cost ofsuch bag is relatively high.
  • the tightening strength of the tongue and groove structure is not enough to stand for a bag containing heavy goods or one that is full of goods and will release and disconnect.
  • the said union bag has no handling means for carrying by hand. Therefore. the union bag is generally limited to a size smaller than the palm area and generally used to fill with medicine or flower seeds etc.
  • Another kind of conventional plastic bag is formed with a tube-like annular passage by holding the top edge of the bag opening and hot sealing it on the bag.
  • the annular passage has a cut for introducing a band therethrough.
  • the band can be fastened to close the opening and handled by hand.
  • the main disadvantage is that when the bag is filled with heavy goods and carried with the said band, the gravity force of the content almost concentrates at the bag opening.
  • the annular passage which receives the band thus has a great stress.
  • the tensile strength of the plastic film is generally decreased at the portion being hot sealed. It will thus cause the said portion to be easily torn off or broken with the increased stress thereon.
  • the plastic bag according to the present invention comprises a bag body having at least one retention member which is formed close to the bag opening at a suitable distance by hot sealing a plastic sheet or film at least at two points on said bag body in order to provide a passage between the said two adjacent points, and an endless band movably retained in said passage.
  • This bag can be tightened simply by self-fastening the said band.
  • the present plastic bag with said structure can eliminate the drawbacks of the above mentioned conventional plastic bags, and provides an advantage of a quick tightening operation. Further, when the bag is tightened, the stress is applied on the bag body, and the hot sealed portion will not be effected by the stress to cause any damage.
  • the main object of the present invention is to provide a plastic bag which utilizes an endless band, passing through a retention member which is formed by hot sealing a plastic sheet'or film on said bag. to tighten the bag opening by self-fastening. and the fastened band can be readily carried by hand.
  • FIG. 1 is a front view depicting the plastic bag of an embodiment according to the present invention
  • FIG. 2 is a sketch depicting the tightened status of the bag opening by means of the tightening band attached thereon;
  • FIGS. 3 to 6 are front views depicting various modified embodiments of the plastic bag according to the present invention.
  • the blow molded plastic bag is generally hot sealed at a suitable portion 2 on bottom of the bag body 1.
  • the content is filled from the opening 3.
  • FIG. 1 The characteristics of an embodiment of the plastic bag according to the present invention is shown in FIG. 1, where the bag is provided with two retention members 4 and 4 near the opening 3 of the body 1.
  • the retention members 4 and 4 have three hot sealing points 41, 41 and 41".
  • a passage is formed between two adjacent hot sealing points, such as 41 and 41 or 41 and 41".
  • An endless band 5 can be freely moved into the said passage.
  • the plastic bag of the present invention is preferably made of polyethylene, so that, the retention members 4 and 4 also preferably employ polyethylene plastic sheet or film for readily being hot sealed on body 1.
  • the tightening band 5 this is preferably made of polypropylene.
  • the length of band 5 is from about one to twofolds of the bag width. But, actually, it can be varied as required.
  • the distance between two retention members 4 and 4 is slightly smaller than the double length of band 5 in order that when the band 5 is movably retained in the two members 4 and 4, the bag body 1 will have a uniform appearance.
  • FIG. 3 there is only one retention member 4.
  • Two passages are formed between three hot sealed points and the band recycles through said two passages.
  • FIG. 4 illustrates another embodiment which has two retention members 4 and 4, each hot sealed at two points 41 and 41' to form only one passage.
  • the level of retention members 4 and 4 namely, the distances between the said retention members and top edge of opening 3 are different.
  • FIG. 5 is an embodiment similar to that shown in FIG. 4, but the said levels of the members is about the same.
  • FIG. 6 shows still another embodiment which provides only one retention member 4 with two hot sealed points.
  • a plastic bag comprising a bag body, at least one retention member formed on said body at a predetermined distance from a bag opening, said retention member comprising a patch of plastic sheet or film having a length less than the entire circumference of said bag body and being hot sealed at least at three points on said bag body to define at least two passages in each retention member, and an endless band movably retained in the said passages.

Abstract

A plastic bag comprising a bag body, at least one retention member which is formed close to the bag opening by hot sealing a plastic sheet or film at least at two points on said bag body in order to provide a passage between the said two adjacent points, and an endless band movably retained in said passage. The bag can be tightened simply by self-fastening the said band.

Description

United States Patent 1191 Lin 1 1 PLASTIC BAG HAVING TIGIITENING BAND [76] Inventor: Spencer B. T. Lin, 3F, No. 5, Ln. 4,
Chin Chou St., Taipei, Taiwan, China [22] Filed: Aug. 14, I973 [21] App]. N0.: 388,190
[52] US. Cl. 229/63; 24/30.5 R; 24/30.5 P; 150/11 [51] Int. Cl. B65D 33/28 [58] Field of Search 229/63, 54 C, 62; 150/11, 150/3; 24/305 R, 30.5 P
[56] References Cited UNITED STATES PATENTS 906,447 12/1908 Moore .f. 229/63 2,533,829 12/1950 Merryweather 150/3 X 2,799,611 7/1957 Dreisbach 229/63 X 1 June 17, 1975 3,620,774 11/1971 Ford et a1. 229/63 X 3,653,583 4/1972 Meyer 229/63 X FOREIGN PATENTS OR APPLICATIONS 1,368,287 6/1964 France 150/3 1,276,833 10/1961 France r 150/3 531.172 6/1955 Italy 24/305 R Primary Examiner-Wi11iam 1. Price Assistant Examiner-Stephen P. Garbe [57] ABSTRACT A plastic bag comprising a bag body, at least one retention member which is formed close to the bag opening by hot sealing a plastic sheet or film at least at two points on said bag body in order to provide a passage between the said two adjacent points, and an endless band movably retained in said passage. The bag can be tightened simply by self-fastening the said band.
1 Claim, 6 Drawing Figures PLASTIC BAG HAVING TIGHTENING BAND FIELD OF THE INVENTION The present invention relates to a plastic bag, and more particularly. to a plastic bag which utilizes an endless band, passing through a retention member which is formed by hot sealing a plastic sheet or film on said bag, to tighten the bag opening by self-fastening.
BACKGROUND OF THE INVENTION Plastic bags have been widely used for packing purposes. Especially. the polyethylene bag has various advantages, such as a neat appearance, transparent. nontoxic, low cost, impermeable to water etc. so that it is more suitable to be used for packing foods, such as vegetables, fruits, fishes and meals etc. and has become an indispensable packing material used in the market or store.
But the plastic bag with goods contained therein has to be further tightened by a band, rope or string to prevent the goods from dropping out ofthe bag. This tightening operation takes time. which will in turn require an increase in the working capacity, even to an extent that it obstructs the procession of sales.
By now, there are several kinds of plastic bags having a quick tightening feature. the so called union bag, for instance. This provides a tongue and groove structure along the entire transverse length near the bag opening. It simply needs a slight pressure to be applied on the portion of the said tongue anti groove structure to connect them, so as to readily tighten the opening. This tightening operation is quite simple, but the production cost ofsuch bag is relatively high. In addition, the tightening strength of the tongue and groove structure is not enough to stand for a bag containing heavy goods or one that is full of goods and will release and disconnect. Moreover, the said union bag has no handling means for carrying by hand. Therefore. the union bag is generally limited to a size smaller than the palm area and generally used to fill with medicine or flower seeds etc.
Another kind of conventional plastic bag is formed with a tube-like annular passage by holding the top edge of the bag opening and hot sealing it on the bag. The annular passage has a cut for introducing a band therethrough. The band can be fastened to close the opening and handled by hand. But the main disadvantage is that when the bag is filled with heavy goods and carried with the said band, the gravity force of the content almost concentrates at the bag opening. The annular passage which receives the band thus has a great stress. The tensile strength of the plastic film is generally decreased at the portion being hot sealed. It will thus cause the said portion to be easily torn off or broken with the increased stress thereon.
SUMMARY OF THE INVENTION The plastic bag according to the present invention comprises a bag body having at least one retention member which is formed close to the bag opening at a suitable distance by hot sealing a plastic sheet or film at least at two points on said bag body in order to provide a passage between the said two adjacent points, and an endless band movably retained in said passage. This bag can be tightened simply by self-fastening the said band.
The present plastic bag with said structure can eliminate the drawbacks of the above mentioned conventional plastic bags, and provides an advantage of a quick tightening operation. Further, when the bag is tightened, the stress is applied on the bag body, and the hot sealed portion will not be effected by the stress to cause any damage.
The main object of the present invention is to provide a plastic bag which utilizes an endless band, passing through a retention member which is formed by hot sealing a plastic sheet'or film on said bag. to tighten the bag opening by self-fastening. and the fastened band can be readily carried by hand.
Other objects and features of the present invention will be apparent from the following description with reference to the annexed drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view depicting the plastic bag of an embodiment according to the present invention;
FIG. 2 is a sketch depicting the tightened status of the bag opening by means of the tightening band attached thereon;
FIGS. 3 to 6 are front views depicting various modified embodiments of the plastic bag according to the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT Referring to FIG, 1, the blow molded plastic bag is generally hot sealed at a suitable portion 2 on bottom of the bag body 1. The content is filled from the opening 3. The characteristics of an embodiment of the plastic bag according to the present invention is shown in FIG. 1, where the bag is provided with two retention members 4 and 4 near the opening 3 of the body 1. The retention members 4 and 4 have three hot sealing points 41, 41 and 41". A passage is formed between two adjacent hot sealing points, such as 41 and 41 or 41 and 41". An endless band 5 can be freely moved into the said passage.
The plastic bag of the present invention is preferably made of polyethylene, so that, the retention members 4 and 4 also preferably employ polyethylene plastic sheet or film for readily being hot sealed on body 1. As for the tightening band 5, this is preferably made of polypropylene.
In general, the length of band 5 is from about one to twofolds of the bag width. But, actually, it can be varied as required. The distance between two retention members 4 and 4 is slightly smaller than the double length of band 5 in order that when the band 5 is movably retained in the two members 4 and 4, the bag body 1 will have a uniform appearance.
To perform the tightening operation after the content has been filled into the bag, one only needs to take the both extending return ends 51 and 51 to another side of the bag, i.e., so that the band 5 surrounds the body 1. Then one takes one end 51 or 51' and passes it through the other end 51' or 51 to fasten them. The opening 3 is thus tightly closed, and the extending end 51 as shown in FIG. 2 may be carried by hand. When the bag is tightened, the stress is mostly applied on the body 1 at the portion corresponding to the said retention members 4 and 4, and will not cause any trouble to the hot sealed points 41, 41 or 41".
The aforementioned arrangement is merely a preferred embodiment and the present invention can take various forms. For example, as shown in FIG. 3, there is only one retention member 4. Two passages are formed between three hot sealed points and the band recycles through said two passages. FIG. 4 illustrates another embodiment which has two retention members 4 and 4, each hot sealed at two points 41 and 41' to form only one passage. Further, the level of retention members 4 and 4, namely, the distances between the said retention members and top edge of opening 3 are different. FIG. 5 is an embodiment similar to that shown in FIG. 4, but the said levels of the members is about the same. FIG. 6 shows still another embodiment which provides only one retention member 4 with two hot sealed points.
The aforementioned embodiments serve only for illustrative purposes and by no means to restrict the scope of the present invention. Any modifications can easily be made by those skilled in the art and should be considered within the scope of the attached claims.
1 claim:
l. A plastic bag comprising a bag body, at least one retention member formed on said body at a predetermined distance from a bag opening, said retention member comprising a patch of plastic sheet or film having a length less than the entire circumference of said bag body and being hot sealed at least at three points on said bag body to define at least two passages in each retention member, and an endless band movably retained in the said passages.
l l l 8

Claims (1)

1. A plastic bag comprising a bag body, at least one retention member formed on said body at a predetermined distance from a bag opening, said retention member comprising a patch of plastic sheet or film having a length less than the entire circumference of said bag body and being hot sealed at least at three points on said bag body to define at least two passages in each retention member, and an endless band movably retained in the said passages.
US388190A 1973-08-14 1973-08-14 Plastic bag having tightening band Expired - Lifetime US3889872A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982687A (en) * 1975-07-09 1976-09-28 Kimberly-Clark Corporation Close and carry bag
US4286429A (en) * 1978-04-14 1981-09-01 Lin Spencer B T Polypropylene endless loop and the method therefor
US4854735A (en) * 1987-11-04 1989-08-08 Ironclad, Corporation Plastic film bag with integral plastic film tie element, and associated fabrication methods
US4948268A (en) * 1987-11-04 1990-08-14 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5009517A (en) * 1987-11-04 1991-04-23 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5044775A (en) * 1987-11-04 1991-09-03 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5045042A (en) * 1987-11-04 1991-09-03 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
GB2248052A (en) * 1990-08-31 1992-03-25 Instance Ltd David J Bag ties
US5123753A (en) * 1988-05-05 1992-06-23 Richard Hoyle Bag and fastening means therefor
US5133607A (en) * 1991-04-22 1992-07-28 Reynolds Consumer Products Inc. Plastic liner bag with elastic top tie strip
US5188580A (en) * 1987-11-04 1993-02-23 John C. Marrelli Plastic film bag manufacturing apparatus and associated methods, and plastic film bags produced thereby
US5346456A (en) * 1987-11-04 1994-09-13 John C. Marrelli Plastic film bag manufacturing apparatus and associated methods, and plastic film bags produced thereby
US20060204716A1 (en) * 2005-03-14 2006-09-14 Bonke Douglas D Elastic drawstring having improved modulus and improved tensile yield for use on a plastic liner bag
US8033728B1 (en) * 2008-01-09 2011-10-11 Shatwell Barbara A Method of closing a bag
US8485380B1 (en) 2008-08-05 2013-07-16 Kenneth A. Abrams Container reclosure device having a flexible band

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906447A (en) * 1905-11-11 1908-12-08 Richmond S A Moore Bag.
US2533829A (en) * 1947-10-18 1950-12-12 Merryweather Gerald Storage bag for paintbrushes and the like
US2799611A (en) * 1951-10-09 1957-07-16 Dale A Dreisbach Method of securing a drawstring to a flexible bag
US3620774A (en) * 1968-08-01 1971-11-16 Ici Ltd Plastics containers and packages
US3653583A (en) * 1970-09-14 1972-04-04 Bemis Co Inc Drawcord bag

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906447A (en) * 1905-11-11 1908-12-08 Richmond S A Moore Bag.
US2533829A (en) * 1947-10-18 1950-12-12 Merryweather Gerald Storage bag for paintbrushes and the like
US2799611A (en) * 1951-10-09 1957-07-16 Dale A Dreisbach Method of securing a drawstring to a flexible bag
US3620774A (en) * 1968-08-01 1971-11-16 Ici Ltd Plastics containers and packages
US3653583A (en) * 1970-09-14 1972-04-04 Bemis Co Inc Drawcord bag

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982687A (en) * 1975-07-09 1976-09-28 Kimberly-Clark Corporation Close and carry bag
US4286429A (en) * 1978-04-14 1981-09-01 Lin Spencer B T Polypropylene endless loop and the method therefor
US5188580A (en) * 1987-11-04 1993-02-23 John C. Marrelli Plastic film bag manufacturing apparatus and associated methods, and plastic film bags produced thereby
US4854735A (en) * 1987-11-04 1989-08-08 Ironclad, Corporation Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5009517A (en) * 1987-11-04 1991-04-23 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5044775A (en) * 1987-11-04 1991-09-03 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5045042A (en) * 1987-11-04 1991-09-03 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5346456A (en) * 1987-11-04 1994-09-13 John C. Marrelli Plastic film bag manufacturing apparatus and associated methods, and plastic film bags produced thereby
US4948268A (en) * 1987-11-04 1990-08-14 John C. Marrelli Plastic film bag with integral plastic film tie element, and associated fabrication methods
US5123753A (en) * 1988-05-05 1992-06-23 Richard Hoyle Bag and fastening means therefor
US5286111A (en) * 1990-08-31 1994-02-15 David J. Instance Limited Bag ties and manufacture thereof
GB2248052B (en) * 1990-08-31 1994-06-08 Instance Ltd David J Bag ties and manufacture thereof
GB2248052A (en) * 1990-08-31 1992-03-25 Instance Ltd David J Bag ties
US5133607A (en) * 1991-04-22 1992-07-28 Reynolds Consumer Products Inc. Plastic liner bag with elastic top tie strip
US20060204716A1 (en) * 2005-03-14 2006-09-14 Bonke Douglas D Elastic drawstring having improved modulus and improved tensile yield for use on a plastic liner bag
US20090074332A1 (en) * 2005-03-14 2009-03-19 Bonke Douglas D Elastic Drawstring Having Improved Modulus and Improved Tensile Yield for use on a Plastic Liner Bag
US7520673B2 (en) * 2005-03-14 2009-04-21 Reynolds Consumer Products, Inc. Elastic drawstring having improved modulus and improved tensile yield for use on a plastic liner bag
US7758243B2 (en) 2005-03-14 2010-07-20 Reynolds Consumer Products, Inc. Elastic drawstring having improved modulus and improved tensile yield for use on a plastic liner bag
US8033728B1 (en) * 2008-01-09 2011-10-11 Shatwell Barbara A Method of closing a bag
US8485380B1 (en) 2008-08-05 2013-07-16 Kenneth A. Abrams Container reclosure device having a flexible band
US8720725B2 (en) 2008-08-05 2014-05-13 Kenneth A. Abrams Container reclosure device having a flexible band

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