US3358904A - Plastic bags - Google Patents

Plastic bags Download PDF

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Publication number
US3358904A
US3358904A US587140A US58714066A US3358904A US 3358904 A US3358904 A US 3358904A US 587140 A US587140 A US 587140A US 58714066 A US58714066 A US 58714066A US 3358904 A US3358904 A US 3358904A
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US
United States
Prior art keywords
bag
straps
piece
plastic bags
handgrips
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
Application number
US587140A
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English (en)
Inventor
Ghislain Leon Van Houtte
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3358904A publication Critical patent/US3358904A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D33/06—Handles
    • B65D33/065—Integral handles

Definitions

  • the present invention relates to a one piece bag of plastic material.
  • handles have already been added, or orifices have been formed at the top of each wall to be used as handgrips or holes through which thin strings were passed have been provided.
  • the bag be made from a material having an appropriate strength or that at least the cut portion be reinforced in order to avoid tearing under tension.
  • the present invention does not have these disadvanrages.
  • the bag is constructed so that the bag periphery stressed by the load is continuous and seamless.
  • the gripping means consist of two straps made from endless strips which are integral with the walls of the bag and are bounded by the cutting line in such a manner that the straps converge towards the exterior of the bag, the cutout made between the straps providing access to the interior of the bag.
  • This arrangement of the straps allows one 3,358,904 Patented Dec. 19, 1967 to grip themvery easily and allows the straps to be extended in a more uniform fashion along the axis of tension of the bag when the latter is filled, i.e. according to this arrangement the stresses occuring in the straps are distributed more uniformly.
  • the invention as defined above allows one to manufacture a one piece bag from a plastic material having an exceptional resistance to tension whilst using only a plastic material of a very small thickness. Whilst in present practice a plastic bag can not be manufactured with a thickness of the plastic material of mm., the method according to the invention permits one to use, with at least equal resistance, a thickness of material of a few hundredths of a millimetre. Hence an appreciable economy of material and thus a reduction of the cost price is achieved. Furthermore, all the load of the bag is supported by a single unwelded piece, hence an increase in the strength of the bag is provided.
  • FIGURE 1 shows a piece of tubing forming the rough shape of the bag.
  • FIGURE 2 shows the bag produced from the piece of FIGURE 1, after having cut out the portions C, D, E and made the straps F and F.
  • FIGURE 3 shows the bag of FIGURE 2, with the straps turned outwardly.
  • FIGURE 4 shows the bag of FIGURE 2 in the carrying position, the straps being joined and superimposed at their top.
  • FIGURE 1 a piece of a flexible tube forming the rough shape of the bag, is shown. This piece is obtained by transverse cuts from a length of tubing along lines A and A.
  • the periphery B, B, B is continuous and seamless.
  • the side edges A and A are welded together in order to form the rough shape of the bag, this bag thus being closed on all its four sides.
  • FIGURE 2 shows the bag made from the piece of FIG- URE 1 after having cut out the portions C, D, E from the upper part of the bag.
  • the straps F and F are thus produced in such a way that the continuous periphery B, B, B is stressed by the load.
  • the strength of the bag is thus substantially increased while at the same time there is no fear that the gripping portions of the bag will tear.
  • the straps F and F are cut obliquely and converge at their top, the stresses due to the pull of the bag when loaded being thus distributed in a more uniform manner.
  • the straps are extended in a more uniform fashion along the axis of tension of the bag. It has been found advantageous to give a rounded shape to the connection of the straps to the body of the bag in order to increase the strength of the connection.
  • the length and width of the straps are chosen according to the dimensions of the bag and their spacing is chosen so as to readily fold outwardly, as shown in FIGURE 3, in such a manner that a complete opening for entry to the bag is not impeded.
  • FIGURE 4 shows the disposition of the straps for carrying by hand.
  • the tops of the straps are superimposed in such a manner as to form in the hand a non cutting, very soft, double strap support, having a high tension strength due to the converging arrangement of the straps.
  • R. PESHOCK Assistant Examiner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
US587140A 1965-11-23 1966-10-17 Plastic bags Expired - Lifetime US3358904A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE20648 1965-11-23

Publications (1)

Publication Number Publication Date
US3358904A true US3358904A (en) 1967-12-19

Family

ID=3839913

Family Applications (1)

Application Number Title Priority Date Filing Date
US587140A Expired - Lifetime US3358904A (en) 1965-11-23 1966-10-17 Plastic bags

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US (1) US3358904A (enrdf_load_html_response)
FR (1) FR1500536A (enrdf_load_html_response)
NL (1) NL6616469A (enrdf_load_html_response)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660959A (en) * 1970-03-31 1972-05-09 Arthur E La Fleur Method of forming product-filled bag
US4099616A (en) * 1977-04-14 1978-07-11 Illinois Tool Works Inc. Two-bottle package and bag
US4165832A (en) * 1978-07-10 1979-08-28 Mobil Oil Corporation Thermoplastic bag
US4244408A (en) * 1978-12-28 1981-01-13 Yamatoya Company Limited Utility bag
US4877336A (en) * 1982-06-14 1989-10-31 Paramount Packaging Corporation Bottom loaded duplex bag having a handle and method of making same
USRE33122E (en) * 1977-03-17 1989-12-05 Mobil Oil Corporation Apparatus for loading bags
US5074674A (en) * 1990-12-06 1991-12-24 Vanguard Plastic, Inc. Thermoplastic bag
US5112138A (en) * 1982-06-14 1992-05-12 Paramount Packaging Corporation Resealable reusable flexible plastic bag with loop handle
USRE34019E (en) * 1978-03-23 1992-08-04 Mobil Oil Corporation Thermoplastic bag

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1808375A (en) * 1929-08-26 1931-06-02 Neal W Plooster Shopping bag
US3180557A (en) * 1962-07-10 1965-04-27 Celloplast Ab Bag with handle of weldable plastic material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1808375A (en) * 1929-08-26 1931-06-02 Neal W Plooster Shopping bag
US3180557A (en) * 1962-07-10 1965-04-27 Celloplast Ab Bag with handle of weldable plastic material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660959A (en) * 1970-03-31 1972-05-09 Arthur E La Fleur Method of forming product-filled bag
USRE33122E (en) * 1977-03-17 1989-12-05 Mobil Oil Corporation Apparatus for loading bags
US4099616A (en) * 1977-04-14 1978-07-11 Illinois Tool Works Inc. Two-bottle package and bag
USRE34019E (en) * 1978-03-23 1992-08-04 Mobil Oil Corporation Thermoplastic bag
US4165832A (en) * 1978-07-10 1979-08-28 Mobil Oil Corporation Thermoplastic bag
US4244408A (en) * 1978-12-28 1981-01-13 Yamatoya Company Limited Utility bag
US4877336A (en) * 1982-06-14 1989-10-31 Paramount Packaging Corporation Bottom loaded duplex bag having a handle and method of making same
US5112138A (en) * 1982-06-14 1992-05-12 Paramount Packaging Corporation Resealable reusable flexible plastic bag with loop handle
US5074674A (en) * 1990-12-06 1991-12-24 Vanguard Plastic, Inc. Thermoplastic bag

Also Published As

Publication number Publication date
NL6616469A (enrdf_load_html_response) 1967-05-24
FR1500536A (fr) 1967-11-03

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