US3435736A - Method of making a square bottom bag - Google Patents
Method of making a square bottom bag Download PDFInfo
- Publication number
- US3435736A US3435736A US494470A US3435736DA US3435736A US 3435736 A US3435736 A US 3435736A US 494470 A US494470 A US 494470A US 3435736D A US3435736D A US 3435736DA US 3435736 A US3435736 A US 3435736A
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- US
- United States
- Prior art keywords
- bag
- flap
- container
- walls
- sealed
- 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
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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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
Definitions
- the present invention relates to the manufacture of bags and more particularly to the method for the manufacture of bags having a square or rectangular bottom section.
- the invention is particularly directed to a folding process of a container having two fiat Walls, the said container being closed on both side edges and at the bottom edge and opened at the top edge, in order to obtain a bag having a square or rectangular bottom.
- the walls are spread apart by known technology to flatten the lower corners of the container and to form a triangular flap at 90 from the plane of the original container.
- the two surfaces of the said flap are heat sealed together in order to prevent the filling material (food or goods) from entering into the corner flap which would tend to deform the rectangular or square shape of the bottom surface.
- the said flap may be cut away leaving a small portion, of the sealed flap in order to maintain the bottom of the bag sealed.
- the flap may also be folded on the side or on the bottom of the bag and sealed thereagainst.
- FIG. 1 shows a container in the original form.
- FIGS. 2 and 3 show two bags folded in their final shape.
- FIG. 4 shows the part of the bag with a cut-away triangular fiap, the flap being shown in dotted lines.
- FIGS. 5 and 6 show a section of the lower part of the bag with the triangular flap respectively extended and cut away.
- FIG. 7 shows a bag folded for storage.
- a fiat bag such as shown in FIG. 1 is used as a prefabricated container.
- the said container comprises two walls 2 and 3 closed on both side edges 4 and 5 and at the bottom edge 6.
- the top of the bag is open.
- the lower corners of the bag are pulled apart to form triangular flaps 7 and 7 such as shown in dotted lines in FIG. 4.
- the size of the flap is determined by the size and shape of the bag which is folded.
- the base of the triangular flap corresponds to the width of the bag.
- FIG. 5 shows the cross-section of the lower part of a bag after the flap 7 has been formed.
- the two surfaces 8 and 9 of the flap 7 are heat sealed together to prevent 3,435,736 Patented Apr. 1, 1969 the material in the bag from entering between the two surfaces 8 and 9.
- the two surfaces 8 and 9 may be heat-sealed or glued with an appropriate glue.
- the triangular flap 7 may be folded upwardly and sealed against the side 10 of the bag or folded downwalrdly and sealed against the flat bottom 12.
- the flap may 'be heat-sealed or glued to the sides or the bottom as described for the two surfaces 8 and 9 of the flap 7.
- FIG. 5 shows the arrow B indicating the rotation of the flap 7 when fixed to the side 10. When the flap is rotated in the direction shown by the arrow C, the said flap is sealed against the bottom 12.
- the flap 7 If the additional rigidity provided by the-flap 7 is not needed or if for some other reasons, such as economy of space or weight, the flap 7 is not wanted, the major part of the flap is cut away as shown in FIG. 6. The base 13 of the said flap is not removed. The remaining part 13 of the flap 7 seals the bottom 12 and sides 10 in order to prevent the escapement of the material in the bag.
- the bags are folded flat one over the other. Accordingly, the bags are creased along the lines 14 corresponding to the top edges of the flaps 7 and 7' as if the latter are folded upwardly as shown in FIG. 3. At least one of the walls is also creased on line 15 across the full width at the level of the top apexes of the flap as shown in FIG. 3 so that the lower part of the bag may be folded as shown in FIG. 7.
- a fiat bag such as shown in FIG. 1, which is easily available on the market, may be commonly folded into a bag having a square or rectangular bottom the lower section of the bag being simply sealed. With this process it is possible to obtain from the same original container a plurality of proportions between the sides of the finished bag.
- the sealed portion of the flaps formed in the lower portion of the bag may be used to reinforce the said portion.
- a process for folding a nonfibrous plastic container having two fiat walls comprising spreading apart the walls at the lower corners of the container, forming in the lower corners of the container a triangular flap at substantially with the plane of the walls; heat-sealing the walls together inside the said triangular flap, folding and sealing the said flap on the side or on the bottom of the bag.
- a process for folding a non-fibrous container having two flat walls comprising spreading apart the top walls at the lower corners of the container, forming in the lower corners of the container a triangular flap at substantially 90 with the plane of the walls, heat-sealing the walls together inside the said triangular flap; and cutting off 4 the major portion of the flap leaving a sealed edge along the base of the triangular flap.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Description
' April 1, 1969 E. w. P. REICHE 3,435,736
METHOD OF MAKING A SQUARE BOTTOM BAG Filed Oct. 11, 1965 IIVVEIVTOR ATTORNEYS United States Patent 3,435,736 METHOD OF MAKING A SQUARE BOTTOM BAG Erwin W. P. Reiche, 643 Laurent St., Fabreville, Quebec, Canada Filed Oct. 11, 1965, Ser. No. 494,470 Int. Cl. B31b 49/04 US. Cl. 9335 4 Claims ABSTRACT OF THE DISCLOSURE A method of making a square bottom bag in which triangular flaps formed at the lower corners have their walls sealed together before the flaps are sealed to the side or bottom of the bag.
The present invention relates to the manufacture of bags and more particularly to the method for the manufacture of bags having a square or rectangular bottom section.
The invention is particularly directed to a folding process of a container having two fiat Walls, the said container being closed on both side edges and at the bottom edge and opened at the top edge, in order to obtain a bag having a square or rectangular bottom. The walls are spread apart by known technology to flatten the lower corners of the container and to form a triangular flap at 90 from the plane of the original container. The two surfaces of the said flap are heat sealed together in order to prevent the filling material (food or goods) from entering into the corner flap which would tend to deform the rectangular or square shape of the bottom surface.
The said flap may be cut away leaving a small portion, of the sealed flap in order to maintain the bottom of the bag sealed. The flap may also be folded on the side or on the bottom of the bag and sealed thereagainst.
In order to explain the invention in greater details, the following drawings are included wherein:
FIG. 1 shows a container in the original form.
FIGS. 2 and 3 show two bags folded in their final shape.
FIG. 4 shows the part of the bag with a cut-away triangular fiap, the flap being shown in dotted lines.
FIGS. 5 and 6 show a section of the lower part of the bag with the triangular flap respectively extended and cut away.
FIG. 7 shows a bag folded for storage.
A fiat bag such as shown in FIG. 1 is used as a prefabricated container. The said container comprises two walls 2 and 3 closed on both side edges 4 and 5 and at the bottom edge 6. The top of the bag is open.
It has been found that it is advantageous to cut or puncture the lower corners of the bag along the dotted lines A-A of FIG. 1. These punctured or cut parts allow a better fiow of air through the interior of the bag during the process of folding the bag.
The lower corners of the bag are pulled apart to form triangular flaps 7 and 7 such as shown in dotted lines in FIG. 4. The size of the flap is determined by the size and shape of the bag which is folded. The base of the triangular flap corresponds to the width of the bag.
FIG. 5 shows the cross-section of the lower part of a bag after the flap 7 has been formed. The two surfaces 8 and 9 of the flap 7 are heat sealed together to prevent 3,435,736 Patented Apr. 1, 1969 the material in the bag from entering between the two surfaces 8 and 9. If the bag is made of plastic, the two surfaces 8 and 9 may be heat-sealed or glued with an appropriate glue.
The triangular flap 7 may be folded upwardly and sealed against the side 10 of the bag or folded downwalrdly and sealed against the flat bottom 12. The flap may 'be heat-sealed or glued to the sides or the bottom as described for the two surfaces 8 and 9 of the flap 7. FIG. 5 shows the arrow B indicating the rotation of the flap 7 when fixed to the side 10. When the flap is rotated in the direction shown by the arrow C, the said flap is sealed against the bottom 12.
It is pointed out that the sealed portions help to rigidify the lower section of the bag. The sealing of the two surfaces 8 and 9 adds therefore to the rigidity of the lower section of the bag.
If the additional rigidity provided by the-flap 7 is not needed or if for some other reasons, such as economy of space or weight, the flap 7 is not wanted, the major part of the flap is cut away as shown in FIG. 6. The base 13 of the said flap is not removed. The remaining part 13 of the flap 7 seals the bottom 12 and sides 10 in order to prevent the escapement of the material in the bag.
In order to facilitate the storage of the bags, the latter are folded flat one over the other. Accordingly, the bags are creased along the lines 14 corresponding to the top edges of the flaps 7 and 7' as if the latter are folded upwardly as shown in FIG. 3. At least one of the walls is also creased on line 15 across the full width at the level of the top apexes of the flap as shown in FIG. 3 so that the lower part of the bag may be folded as shown in FIG. 7.
As it may be seen from the above description, a fiat bag, such as shown in FIG. 1, which is easily available on the market, may be commonly folded into a bag having a square or rectangular bottom the lower section of the bag being simply sealed. With this process it is possible to obtain from the same original container a plurality of proportions between the sides of the finished bag. The sealed portion of the flaps formed in the lower portion of the bag may be used to reinforce the said portion.
Although a specific embodiment of the invention has just been described, it will be understood that various modifications may be made thereto without departing from the invention, the scope of which is only to be construed from the appended claims.
I claim:
1. In the manufacture of a square or rectangular bottom bag, a process for folding a nonfibrous plastic container having two fiat walls, said container being closed on both side edges and at the bottom edge, and opened at the top edge, comprising spreading apart the walls at the lower corners of the container, forming in the lower corners of the container a triangular flap at substantially with the plane of the walls; heat-sealing the walls together inside the said triangular flap, folding and sealing the said flap on the side or on the bottom of the bag.
2. In the manufacture of a bag, as recited in claim 1, wherein the corners of the container are punctured prior to spreading the walls apart.
3. In the manufacture of a bag as recited in claim 1, wherein the walls are creased along the line correspond- 3 ing to the top edges of the flap when the latter is folded upwardly, at least one of the walls being also creased across their full width at the level of the top apex of the flaps.
4. In the manufacture of a square or rectangular bottom bag, a process for folding a non-fibrous container having two flat walls, said container bein closed on both side edges and at the bottom edge, and opened at the top edge, comprising spreading apart the top walls at the lower corners of the container, forming in the lower corners of the container a triangular flap at substantially 90 with the plane of the walls, heat-sealing the walls together inside the said triangular flap; and cutting off 4 the major portion of the flap leaving a sealed edge along the base of the triangular flap.
References Cited UNITED STATES PATENTS 2,070,747 2/1937 Orstrom 229-60 2,810,328 10/1957 Seltmann et a1. 93--35 2,985,355 5/1963 Read.
3,025,768 3/1962 Kessler 93-35 10 3,150,573 9/1964 Piazze 93-35 BERNARD STICKNEY, Primary Examiner.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49447065A | 1965-10-11 | 1965-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3435736A true US3435736A (en) | 1969-04-01 |
Family
ID=23964621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US494470A Expired - Lifetime US3435736A (en) | 1965-10-11 | 1965-10-11 | Method of making a square bottom bag |
Country Status (2)
Country | Link |
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US (1) | US3435736A (en) |
GB (1) | GB1141714A (en) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3799042A (en) * | 1972-04-14 | 1974-03-26 | Nat Distillers Chem Corp | Flat-bottom plastic bags and method for the production thereof |
US3900161A (en) * | 1973-09-20 | 1975-08-19 | Maurice R Blackman | Wrapper for bread and the like |
US3916770A (en) * | 1973-07-03 | 1975-11-04 | Violet M Hanson | Method of making a flat bottom bag |
US4010055A (en) * | 1975-06-06 | 1977-03-01 | Nissan Motor Co., Ltd. | Method of producing three-dimensionally shaped inflatable safety bag |
US4226172A (en) * | 1978-12-13 | 1980-10-07 | H. J. Langen & Sons Ltd. | Method for manufacturing a square bottom bag |
DE3008809A1 (en) * | 1980-03-07 | 1982-04-22 | Hans G. 4300 Essen Jentsch | STANDING BASE BAG FROM PLASTIC FILM AND METHOD FOR THE PRODUCTION THEREOF |
US4413464A (en) * | 1976-04-28 | 1983-11-08 | Aktiebolaget Platmanufaktur | Process of producing a package or wrapping for storing or shipping material |
US4526565A (en) * | 1983-02-23 | 1985-07-02 | Linear Films, Inc. | Method of making flat bottom plastic bag |
US4717262A (en) * | 1987-01-09 | 1988-01-05 | T.C. Manufacturing Company, Inc. | Flat bottom plastic bag and method of making same |
WO1991017089A1 (en) * | 1990-05-02 | 1991-11-14 | Jebco Packaging Systems, Inc. | Container and method for manufacturing the same |
US20030185467A1 (en) * | 2000-08-29 | 2003-10-02 | Buchanan Jerry E. | Container for housing product and method for making same |
US20040253399A1 (en) * | 2002-08-23 | 2004-12-16 | M&Q Plastic Products, Inc. | Cook and chill casing |
US7163120B1 (en) * | 2000-01-27 | 2007-01-16 | M&Q Plastic Products, Inc. | Contour fit pan liner for a food service pan |
US20070071368A1 (en) * | 1996-07-30 | 2007-03-29 | Becker John W | Method and apparatus for packaging perishable goods |
ITMC20080173A1 (en) * | 2008-09-29 | 2010-03-30 | Tiziana Fedele | PROCEDURE FOR THE CONSTRUCTION OF A SEMI-ENVELOPE ENVELOPE WITH PARALLELEPIPED CONFORMATION AND ENVELOPE OBTAINED WITH SUCH PROCEDURE. |
US20180327172A1 (en) * | 2017-05-09 | 2018-11-15 | Pratt Retail Specialties, Llc | Insulated bag with handles |
US10322851B2 (en) * | 2016-12-14 | 2019-06-18 | Ah Moi TAN | Self-supporting plastic bag and method for manufacturing same |
US10442600B2 (en) | 2017-04-07 | 2019-10-15 | Pratt Retail Specialties, Llc | Insulated bag |
US10507968B2 (en) | 2017-12-18 | 2019-12-17 | Pratt Retail Specialties, Llc | Modular box assembly |
US10551110B2 (en) | 2017-07-31 | 2020-02-04 | Pratt Retail Specialties, Llc | Modular box assembly |
US10583977B2 (en) | 2016-08-16 | 2020-03-10 | Mp Global Products, L.L.C. | Method of making an insulation material and an insulated mailer |
US20200095042A1 (en) * | 2018-09-26 | 2020-03-26 | Robert C. Kelly | Standing pouch with cap on folded edge |
US20200148453A1 (en) | 2018-11-13 | 2020-05-14 | Pratt Retail Specialties, Llc | Insulated box assembly and temperature-regulating lid therefor |
US10800595B2 (en) | 2017-04-07 | 2020-10-13 | Pratt Retail Specialties, Llc | Box liner |
US10843840B2 (en) | 2018-11-13 | 2020-11-24 | Pratt Retail Specialties, Llc | Insulated box assembly with overlapping panels |
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US10947025B2 (en) | 2017-12-18 | 2021-03-16 | Pratt Corrugated Holdings, Inc. | Insulated block packaging assembly |
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US11059652B2 (en) | 2018-05-24 | 2021-07-13 | Pratt Corrugated Holdings, Inc. | Liner |
US11230404B2 (en) | 2019-11-26 | 2022-01-25 | Pratt Corrugated Holdings, Inc. | Perforated collapsible box |
USD968950S1 (en) | 2020-08-10 | 2022-11-08 | Pratt Corrugated Holdings, Inc. | Perforated collapsible box |
US11718464B2 (en) | 2020-05-05 | 2023-08-08 | Pratt Retail Specialties, Llc | Hinged wrap insulated container |
USD1042113S1 (en) * | 2020-01-24 | 2024-09-17 | Graphic Packaging International, Llc | Reinforcing carton |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU6923196A (en) * | 1995-09-15 | 1997-04-01 | Plum Kemi Produktion A/S | A bag or pouch and a method of producing the same |
IT1286281B1 (en) | 1996-10-31 | 1998-07-08 | Bl Macchine Automatiche | METHOD FOR REGISTRATION OF PLASTIC BAGS AND BAGS SO OBTAINED |
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US2070747A (en) * | 1933-02-02 | 1937-02-16 | Gerh Arehns Mek Verkst Ab | Receptacle |
US2810328A (en) * | 1953-12-28 | 1957-10-22 | Natronzellstoff Und Papierfab | Method and apparatus for manufacturing paper bags |
US2985355A (en) * | 1952-12-03 | 1961-05-23 | Robert E Read | Bags and method of making bags |
US3025768A (en) * | 1956-03-16 | 1962-03-20 | West Virginia Pulp & Paper Co | Method and apparatus for making a non-gussetted bag with satchel bottom adapted to provide an open container with square corners |
US3150573A (en) * | 1962-01-11 | 1964-09-29 | Continental Can Co | Bag making method |
-
1965
- 1965-10-11 US US494470A patent/US3435736A/en not_active Expired - Lifetime
-
1966
- 1966-08-30 GB GB38690/66A patent/GB1141714A/en not_active Expired
Patent Citations (5)
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US2070747A (en) * | 1933-02-02 | 1937-02-16 | Gerh Arehns Mek Verkst Ab | Receptacle |
US2985355A (en) * | 1952-12-03 | 1961-05-23 | Robert E Read | Bags and method of making bags |
US2810328A (en) * | 1953-12-28 | 1957-10-22 | Natronzellstoff Und Papierfab | Method and apparatus for manufacturing paper bags |
US3025768A (en) * | 1956-03-16 | 1962-03-20 | West Virginia Pulp & Paper Co | Method and apparatus for making a non-gussetted bag with satchel bottom adapted to provide an open container with square corners |
US3150573A (en) * | 1962-01-11 | 1964-09-29 | Continental Can Co | Bag making method |
Cited By (84)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3799042A (en) * | 1972-04-14 | 1974-03-26 | Nat Distillers Chem Corp | Flat-bottom plastic bags and method for the production thereof |
US3916770A (en) * | 1973-07-03 | 1975-11-04 | Violet M Hanson | Method of making a flat bottom bag |
US3900161A (en) * | 1973-09-20 | 1975-08-19 | Maurice R Blackman | Wrapper for bread and the like |
US4010055A (en) * | 1975-06-06 | 1977-03-01 | Nissan Motor Co., Ltd. | Method of producing three-dimensionally shaped inflatable safety bag |
US4413464A (en) * | 1976-04-28 | 1983-11-08 | Aktiebolaget Platmanufaktur | Process of producing a package or wrapping for storing or shipping material |
US4226172A (en) * | 1978-12-13 | 1980-10-07 | H. J. Langen & Sons Ltd. | Method for manufacturing a square bottom bag |
DE3008809A1 (en) * | 1980-03-07 | 1982-04-22 | Hans G. 4300 Essen Jentsch | STANDING BASE BAG FROM PLASTIC FILM AND METHOD FOR THE PRODUCTION THEREOF |
US4526565A (en) * | 1983-02-23 | 1985-07-02 | Linear Films, Inc. | Method of making flat bottom plastic bag |
US4717262A (en) * | 1987-01-09 | 1988-01-05 | T.C. Manufacturing Company, Inc. | Flat bottom plastic bag and method of making same |
WO1991017089A1 (en) * | 1990-05-02 | 1991-11-14 | Jebco Packaging Systems, Inc. | Container and method for manufacturing the same |
US20070071368A1 (en) * | 1996-07-30 | 2007-03-29 | Becker John W | Method and apparatus for packaging perishable goods |
US9307861B2 (en) | 2000-01-27 | 2016-04-12 | M & Q Ip Leasing, Llc | Contour fit pan liner for a food service pan |
US7163120B1 (en) * | 2000-01-27 | 2007-01-16 | M&Q Plastic Products, Inc. | Contour fit pan liner for a food service pan |
US20040052436A1 (en) * | 2000-08-29 | 2004-03-18 | Buchanan Jerry E. | Flexible container having flat walls |
US7207716B2 (en) * | 2000-08-29 | 2007-04-24 | Nestec S.A. | Flexible container having flat walls |
US7217032B2 (en) * | 2000-08-29 | 2007-05-15 | Nestec S.A. | Container for housing product and method for making same |
US20030185467A1 (en) * | 2000-08-29 | 2003-10-02 | Buchanan Jerry E. | Container for housing product and method for making same |
US20040253399A1 (en) * | 2002-08-23 | 2004-12-16 | M&Q Plastic Products, Inc. | Cook and chill casing |
ITMC20080173A1 (en) * | 2008-09-29 | 2010-03-30 | Tiziana Fedele | PROCEDURE FOR THE CONSTRUCTION OF A SEMI-ENVELOPE ENVELOPE WITH PARALLELEPIPED CONFORMATION AND ENVELOPE OBTAINED WITH SUCH PROCEDURE. |
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