US3837564A - Carrier bag - Google Patents

Carrier bag Download PDF

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Publication number
US3837564A
US3837564A US00240922A US24092272A US3837564A US 3837564 A US3837564 A US 3837564A US 00240922 A US00240922 A US 00240922A US 24092272 A US24092272 A US 24092272A US 3837564 A US3837564 A US 3837564A
Authority
US
United States
Prior art keywords
bag
flap
side seams
level
wall
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
US00240922A
Other languages
English (en)
Inventor
B Marquardt
F Bosse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Application granted granted Critical
Publication of US3837564A publication Critical patent/US3837564A/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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/24—End- or aperture-closing arrangements or devices using self-locking integral or attached closure elements, e.g. flaps
    • B65D33/246—Turn-over flaps co-operating with a separate handle or suspension means
    • 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
    • Y10S383/00—Flexible bags
    • Y10S383/903—Stress relief

Definitions

  • the slit is located along substantially the fold line of an inwardly turned flap of said other wall, the flap being engaged by said side seams to define a pocket for receiving a tongue portion of said one wall carrying the handle.
  • the tongue portion is bounded at the sides by incisions which, at a level corresponding to the free edge of the flap, are directed away from the side seams.
  • the incisions may be interrupted so that the tongue portion remains attached to the side seams until it is to be inserted in the pocket.
  • the invention relates to a carrier bag which is made from plastics film and comprises two confronting walls, of which only one wall has welded to it a handle of form-retaining plastics material and the other wall is provided with a slit at substantially the same level as the base of the handle and with an extension which is folded into the bag during manufacture and which, for the purpose of forming a flap, is welded at its side edges to the sides of said other wall from which it extends, wherein the said one wall is so shortened at both sides at marginal portions corresponding to the flap when the bag is in a ready-for-use condition so that the said one wall forms a tongue which is free from welded side seams of the bag.
  • the invention aims to provide an improved carrier bag in which the danger of tears is minimised at the side seams during lifting of the tongue and when carrying bulky contents but without producing apertures through which rain water and dust may reach the bag contents.
  • the lateral incision lines which bound the tongue extend, in the vicinity of the lower edge of the flap, away from the welded side seams and towards the middle of the bag. Tensile forces set up during opening of the bag or as a result of bulky contents are not kept quite remote from the region of the side seams and therefore tearing of the seam or of the wall carrying the tongue is avoided.
  • the incision lines bounding the tongue may, prior to use of the bag, be in the form of lines of weakness bridged by unincised portions which connect the tongue to lateral portions of the said one wall that are engaged by the said welded side seams.
  • This provides the advantage that the bags may be made without producing stamped out waste pieces of plastics film the removal of which from the bag-making machine can be extraordinarily difficult and expensive by reason of the static loading of the film. Also, by leaving the lateral portions of the said one wall attached to the side seams there is less likelihood of rain entering the closed bag because these lateral portions extend right up to the mouth of the bag.
  • the incision lines may be extended upwardly towards the bag mouth so that the ends of the incisions run parallel rather than transversely to the direction in which the bag material is stressed, thereby minimising tear extensions even further.
  • the incision lines extend, as viewed from the bag mouth, vertically downwardly and then along a curved path towards their downwardly diverging principal direction.
  • the incision lines By means of starting the incision lines at right angles to the bag mouth one avoids undesirable points on the lateral portions that remain attached to the welded side seams. The diverging course makes it easier to insert the tongue.
  • the incision lines diverge downwardly from the mouth and then extend arcuately, thereby facilitating insertion of the tongue under the flap and nevertheless ensuring good anchoring beneath the flap by the rounded part of the enlarged central portion of the tongue.
  • the incision lines could also extend substantially parallel to the welded side seams.
  • the particularly desirable form of the invention utilising the teaching of our aforementioned older application by providing unincised bridging portions gives the advantage that the tongue remains attached to the welded side seams before the bag is used, i.e. during transport and storage of the bags, thereby preventing the tongue from drooping or being displaced.
  • the provision of the unincised bridging portions is not however essential.
  • FIG. 1 is a side elevation of a carrier bag
  • FIG. 2 is a longitudinal section through the FIG. 1
  • FIG. 3 is a fragmentary side elevation of the FIG. 1 bag when in use
  • FIG. 4 is a fragmentary longitudinal section of the FIG. 3 condition of the bag.
  • FIGS. 5 to 7 are fragmentary side elevations of moditied carrier bags.
  • the carrier bag comprises a front wall 1, a back wall 2 and a folded-over flap 3 which is formed by an extension of the back wall 2 and which is provided with a slit 4 through which there can be passed a handle 5 which is welded to the front wall I by means of a bar 21 of the handle.
  • the front wall, back wall and flap are interconnected at the sides of the bag by means of weld seams 6 and 7.
  • the front wall 1 is formed with a tongue 9 which extends in height from the free edge 8 of the flap 3 up to the mouth of the bag and which, after filling of the bag, is inserted beneath the flap 3, the handle 5 being passed through the slit '4.
  • the bag can then be carried by the handle and will be closed against the penetration of rain and dust.
  • the tongue 9 is bounded by lines 10 and 11 of weakness so that it is not engaged by the side seams 6, 7 and so that, after it has been torn along the lines of weakness, is freely movable for insertion beneath the flap 3.
  • the lines of weakness are formed by incisions, each of which is interrupted only once by bridging portions 12. A total of two bridging portions, one at each side of the bag, suffices to hold the tongue to the rest of the bag until the bag is ready for use but if this advantage is not important the bridging portions 12 may be dispensed with to leave the incisions 10, 11 uninterrupted.
  • the ends of the incision lines 10, l 1 at the level of the I free lower edge 8 of the flap 3 are directed away from the side seams 6, 7 as indicated at 17.
  • the lowest points of these incisions preferably coincide accurately with the edge 8 of the flap so that rain and dust can likewise not enter easily at this position.
  • the point 17 is shown out of registry with the edge 8 merely in order to give a clearer indication of the shape of the incisions.
  • a terminal portion 18 of each incision is directed towards the bag mouth. If tearing occurs at all, it would start at the terminal portions 18 but, since the terminal portions are directed substantially parallel to the direction in which the bag wall 1 is pulled during use, transverse forces which would tend to extend the tears will not arise.
  • the parts 17 and 18 of each incision and a transitional portion 19 are formed arcuately to minimise tearing even further. Since the incision lines neither intersectthe side scams 6, 7 nor even reach them, tears along the side seams or transversely thereto are avoided.
  • each incision line 10, 11 may be chosen to meet the requirements or wishes of the customer. To facilitate introduction of the tongue it preferably converges upwardly. This is the case in FIGS. 1 to 4. However, to avoid the formation of a point at the corner wall portions 13, 14, the part 20 of each incision is vertical again.
  • the incisions may diverge upwardly as shown in FIG. 5.
  • the additional weld seams 15,- 16 of FIGS. 1 to 4 can be omitted.
  • FIG. 6 A compromise is represented by the FIG. 6 embodiment in which the incisions are outwardly curved, the upper part of the tongue being convergent to facilitate its insertion beneath the flap 3 and its central part being wide to provide good anchoring.
  • a carrying bag made of plastic material comprising two opposing walls, side seams uniting edges of said opposing walls, a carrying handle made of rigid plastic material mounted on one of said walls, the other one of said walls having a handle-receiving slit on the level of the lower end of said handle and comprising an inwardly turned flap portion extending beyond said slit and included in said side seams, said one wall having an incision line adjacent each of said side seams forming a tongue portion carrying said handle, each incision line being directed away from the side seams and toward the center of the bag in the region of the level of the lower end of the inturned flap.
  • each incision line comprises, before the first use of the bag, a plurality of incisions connected by easily tearable portions.
  • each incision line extends upwardly from said region of the level of the lower end of the inturned flap toward the bag mouth.
  • each incision extends vertically upwardly from said region on the level of the lower end of the inturned flap toward the bag mouth and follows a curved path in said region on the level of the lower end of the inturned flap.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
US00240922A 1971-04-08 1972-04-04 Carrier bag Expired - Lifetime US3837564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2117224A DE2117224C3 (de) 1971-04-08 1971-04-08 Traggrifftragetasche aus Kunststoffolie

Publications (1)

Publication Number Publication Date
US3837564A true US3837564A (en) 1974-09-24

Family

ID=5804246

Family Applications (1)

Application Number Title Priority Date Filing Date
US00240922A Expired - Lifetime US3837564A (en) 1971-04-08 1972-04-04 Carrier bag

Country Status (6)

Country Link
US (1) US3837564A (cs)
AT (1) AT316410B (cs)
CH (1) CH537169A (cs)
DE (1) DE2117224C3 (cs)
FR (1) FR2132699B1 (cs)
GB (1) GB1384077A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4493110A (en) * 1980-08-29 1985-01-08 Equitable Bag Co., Inc. Bag construction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036755A (en) * 1957-10-25 1962-05-29 Continental Can Co Tear line construction for paperboard cartons
US3693867A (en) * 1969-06-24 1972-09-26 August Schwarzkopf Handle-type carrying bag made of plastics material sheeting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1916617U (de) * 1964-11-21 1965-05-26 Michael Lehmacher Tragetasche aus einer thermoplastischen kunststoffolie.
DE1923556C3 (de) * 1969-04-05 1974-12-12 Lehmacher, Hans, 5216 Niederkassel Tragetaschen aus thermoplastischer Kunststoffolie
DE2020549C2 (de) * 1970-04-27 1987-01-02 Windmöller & Hölscher, 4540 Lengerich Traggrifftasche aus Kunststoffolie
DE1943335A1 (de) * 1969-08-26 1971-03-04 Gloetzl Curt A Skibindung-U.
DE7043762U (de) * 1970-11-26 1971-04-01 Linneborn Kg Tragetasche

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036755A (en) * 1957-10-25 1962-05-29 Continental Can Co Tear line construction for paperboard cartons
US3693867A (en) * 1969-06-24 1972-09-26 August Schwarzkopf Handle-type carrying bag made of plastics material sheeting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4493110A (en) * 1980-08-29 1985-01-08 Equitable Bag Co., Inc. Bag construction

Also Published As

Publication number Publication date
FR2132699B1 (cs) 1976-06-11
DE2117224B2 (de) 1973-04-26
GB1384077A (en) 1975-02-19
DE2117224A1 (de) 1972-10-26
AT316410B (de) 1974-07-10
CH537169A (de) 1973-05-31
FR2132699A1 (cs) 1972-11-24
DE2117224C3 (de) 1985-01-31

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