US3482762A - Valve bag - Google Patents
Valve bag Download PDFInfo
- Publication number
- US3482762A US3482762A US730384A US3482762DA US3482762A US 3482762 A US3482762 A US 3482762A US 730384 A US730384 A US 730384A US 3482762D A US3482762D A US 3482762DA US 3482762 A US3482762 A US 3482762A
- Authority
- US
- United States
- Prior art keywords
- valve
- bag
- panels
- seals
- valve bag
- 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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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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/14—Valve bags, i.e. with valves for filling
- B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms
Definitions
- a valve bag having side seams and gusseted top and bottom walls. The valve is formed by overlapping portions of the top gusseted wall.
- the bag is preferably fabricated from heat scalable plastic film such as polyethylene, The bag can be made from lengths of plastic film employing automatic bag-making machines.
- This invention relates to a valve bag suitable for manufacture by automatic bag-making machines.
- Valve bags are in general use for packaging materials such as fertilizers and cement. These bags possess the important commercial advantage of easy filling and closing after filling. However, the presence of the valve in the bag structure introduces problems in bag manufacture and may require manual operation of certain steps in the manufacturing process. There is thus need for a valve bag of simple construction that can be manufactured employing automatic bag-making machines.
- valve bag having the valve constructed of overlapping panels in the bag gusset can be manufactured employing automatic bag-making machines.
- the novel design of bag permits an increased rate of production and requires a minimum of manual operations.
- the valve bag of this invention comprises front and back panels joined along two opposed edges to form a flattened tube, the remaining two opposed edges of the front and back panels being joined by gusseted end panels, one of said end panels being formed of two portions having lengths less than the length of the gusseted end panel, said portions overlapping at their inner extremities, the inner extreme edge of each portion being free, thus forming a valve. It is convenient to employ thinner gauge film at the free extremities of the valve walls, the thinner extension in the case of the external valve wall being folded back to lie in contact with the internal valve wall.
- FIGURE 1 is a perspective view of filled bag
- FIGURE 2 is a prespective view of the bag of FIGURE 1 in a collapsed configuration
- FIGURE 3 is a sectional view of simple valve
- FIGURE 4 is a sectional view of a valve having an ex tension of thinner gauge film joined to the free extremity of the inner wall of the valve;
- FIGURE 5 is a sectional view of a valve having extensions of thinner gauge film joined to the free extremities of both walls of the valve, and
- FIGURE 6 is a sectional view along VIVI of FIG- URE 1.
- FIGURES 1 and 2 front and back panels of a bag are shown at 1 and 2 respectively.
- the back panel is disposed in parallel relationship to the front panel.
- Front and back panels are joined along longitudinal seams 2a and 2b.
- At 3 are shown diagonal seals in the gusset region, The diagonal seals assume a V- shaped configuration when the bag is filled.
- At 4 is shown a bag bottom.
- a valve structure is shown at 5 and 6, 5 being the outer portion of the valve and 6 the inner portion of the valve. It is to be noted that the two portions of the valve overlap at their inner extremities.
- the two valve portions are sealed to the front and back panels along seals 3 and 9.
- FIGURE 3 is shown a section through a valve of the configuration of that illustrated in FIGURES 1 and 2.
- FIGURE 4 an extrension of thinner gauge film 7 is joined to the inner wall 6.
- thinner gauge extensions to both walls of the valve are shown, extension 8 being folded back to lie parallel to the inner side of outer walls.
- FIGURE 6 is a sectional view showing the lap sealing of the valve portions 5 and 6 to the front and back panels along seal 9.
- the valve bag of this invention is conveniently fabricated from heat-sealable plastic film such as polyethylene. It is preferred to employ a folded sheet of film having front and back panels 1 and 2 with a joining gusset fold joining the panels at the position of the bag bottom. Two overlapping pieces of film of shape to form the valve 5 and 6 are then sealed to the front and back panels along diagonal gusset seals 3 and transverse seals 9.
- the transverse seals 9 may be of either the lap type as shown in the drawings or of the flange type as employed in seals 2a, 2b and 3.
- the longitudinal seals, 2a and 2b and bottom gusset seals 3 are then made to complete the bag structure. Excess film from the gusset seal is severed external to the seal position.
- valve bag of this invention has the advantage that it can be made in a continuous manner from lengths of plastic film employing automatic bag-making machinery.
- the bag itself is readily filled and in filled configuration is rectangular in shape with attendant advantage in ease of storage.
- a valve bag having front and backpanels joined along two opposed edges to form a flattened tube, the remaining two opposed edges of the front and back panels being joined to gusseted end panels, the improvement which comprises a valve formed by constructing one of the gusseted end panels in two portions sealed to matching edges of the front and back panels along the opposing longitudinal edges of said end panels, the end panels overlapping at their inner extremities so as to form the internal and external walls of the valve, the inner extreme edge of each portion being free and forming the valve opening, the free extremity of the external valve wall carrying an extension folded back into the valve.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Description
Dec. 9, 1969 E. D. JONES VALVE BAG Filed May 20, 1968 v INVENTOR Elwyn David JONES PA TENT AGENT United States Patent 3,482,762 VALVE BAG Elwyn David Jones, Beloeil, Quebec, Canada, assignor to Canadian Industries Limited, Montreal, Quebec, Canada, a corporation of Canada Filed May 20, 1968, Ser. No. 730,384 Claims priority, application Great Britain, June 1, 1967, 25,383/ 67 Int. Cl. B65d 31/14 US. Cl. 229-625 7 Claims ABSTRACT OF THE DISCLOSURE A valve bag having side seams and gusseted top and bottom walls. The valve is formed by overlapping portions of the top gusseted wall. The bag is preferably fabricated from heat scalable plastic film such as polyethylene, The bag can be made from lengths of plastic film employing automatic bag-making machines.
This invention relates to a valve bag suitable for manufacture by automatic bag-making machines.
Valve bags are in general use for packaging materials such as fertilizers and cement. These bags possess the important commercial advantage of easy filling and closing after filling. However, the presence of the valve in the bag structure introduces problems in bag manufacture and may require manual operation of certain steps in the manufacturing process. There is thus need for a valve bag of simple construction that can be manufactured employing automatic bag-making machines.
It has now been discovered that a valve bag having the valve constructed of overlapping panels in the bag gusset can be manufactured employing automatic bag-making machines. The novel design of bag permits an increased rate of production and requires a minimum of manual operations.
It is therefore a primary object of this invention to provide a valve bag that is readily manufactured employing automatic bag-making machines. Additional objectives will appear hereinafter.
The valve bag of this invention comprises front and back panels joined along two opposed edges to form a flattened tube, the remaining two opposed edges of the front and back panels being joined by gusseted end panels, one of said end panels being formed of two portions having lengths less than the length of the gusseted end panel, said portions overlapping at their inner extremities, the inner extreme edge of each portion being free, thus forming a valve. It is convenient to employ thinner gauge film at the free extremities of the valve walls, the thinner extension in the case of the external valve wall being folded back to lie in contact with the internal valve wall.
The invention is illustrated by the accompanying drawings wherein:
FIGURE 1 is a perspective view of filled bag;
FIGURE 2 is a prespective view of the bag of FIGURE 1 in a collapsed configuration;
FIGURE 3 is a sectional view of simple valve;
FIGURE 4 is a sectional view of a valve having an ex tension of thinner gauge film joined to the free extremity of the inner wall of the valve;
FIGURE 5 is a sectional view of a valve having extensions of thinner gauge film joined to the free extremities of both walls of the valve, and
3,482,762 Patented Dec. 9, 1969 FIGURE 6 is a sectional view along VIVI of FIG- URE 1.
Referring to the drawings, in FIGURES 1 and 2 front and back panels of a bag are shown at 1 and 2 respectively. The back panel is disposed in parallel relationship to the front panel. Front and back panels are joined along longitudinal seams 2a and 2b. At 3 are shown diagonal seals in the gusset region, The diagonal seals assume a V- shaped configuration when the bag is filled. At 4 is shown a bag bottom. A valve structure is shown at 5 and 6, 5 being the outer portion of the valve and 6 the inner portion of the valve. It is to be noted that the two portions of the valve overlap at their inner extremities. The two valve portions are sealed to the front and back panels along seals 3 and 9.
In FIGURE 3 is shown a section through a valve of the configuration of that illustrated in FIGURES 1 and 2. In FIGURE 4 an extrension of thinner gauge film 7 is joined to the inner wall 6. In FIGURE 5 thinner gauge extensions to both walls of the valve are shown, extension 8 being folded back to lie parallel to the inner side of outer walls. FIGURE 6 is a sectional view showing the lap sealing of the valve portions 5 and 6 to the front and back panels along seal 9.
The valve bag of this invention is conveniently fabricated from heat-sealable plastic film such as polyethylene. It is preferred to employ a folded sheet of film having front and back panels 1 and 2 with a joining gusset fold joining the panels at the position of the bag bottom. Two overlapping pieces of film of shape to form the valve 5 and 6 are then sealed to the front and back panels along diagonal gusset seals 3 and transverse seals 9. The transverse seals 9 may be of either the lap type as shown in the drawings or of the flange type as employed in seals 2a, 2b and 3. The longitudinal seals, 2a and 2b and bottom gusset seals 3 are then made to complete the bag structure. Excess film from the gusset seal is severed external to the seal position.
The valve bag of this invention has the advantage that it can be made in a continuous manner from lengths of plastic film employing automatic bag-making machinery. The bag itself is readily filled and in filled configuration is rectangular in shape with attendant advantage in ease of storage.
What I claim is:
1. In a valve bag having front and backpanels joined along two opposed edges to form a flattened tube, the remaining two opposed edges of the front and back panels being joined to gusseted end panels, the improvement which comprises a valve formed by constructing one of the gusseted end panels in two portions sealed to matching edges of the front and back panels along the opposing longitudinal edges of said end panels, the end panels overlapping at their inner extremities so as to form the internal and external walls of the valve, the inner extreme edge of each portion being free and forming the valve opening, the free extremity of the external valve wall carrying an extension folded back into the valve.
2. An improved valve bag as claimed in claim 1 wherein the extension of the free extremity of the external valve wall is formed of material that is thinner than the main material of the end panel.
3. An improved valve bag as claimed in claim 1 wherein the free extremity of the internal valve wall carries an extension of material that is thinner than the main material of the end panel.
4. An improved valve bag as claimed in claim 1 wherein the panels forming the valve are joined to the front and back panels by lap seals.
5. An improved valve bag as claimed in claim 1 wherein the bag is constructed of heat-sealable plastic film.
6. An improved valve bag as claimed in claim 5 wherein the seams of the bag are formed by heat sealing.
7. An improved valve bag as claimed in claim 5 wherein the bag is made of polyethylene film.
References Cited UNITED STATES PATENTS 3,235,169 2/1966 Gennerich et a1 229-625 I FOREIGN PATENTS 1,185,466 1/ 1965 Germany.
DAVID M. BOCKENEK, Primary Examiner US. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB25383/67A GB1211696A (en) | 1967-06-01 | 1967-06-01 | Improvements in and related to valved bags |
Publications (1)
Publication Number | Publication Date |
---|---|
US3482762A true US3482762A (en) | 1969-12-09 |
Family
ID=10226787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US730384A Expired - Lifetime US3482762A (en) | 1967-06-01 | 1968-05-20 | Valve bag |
Country Status (8)
Country | Link |
---|---|
US (1) | US3482762A (en) |
BE (1) | BE715980A (en) |
BR (1) | BR6899428D0 (en) |
DK (1) | DK120520B (en) |
FR (1) | FR1581548A (en) |
GB (1) | GB1211696A (en) |
IL (1) | IL30033A (en) |
SE (1) | SE330123B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4095736A (en) * | 1976-10-22 | 1978-06-20 | International Paper Company | Bag closure having valve sleeve |
US4524460A (en) * | 1983-02-14 | 1985-06-18 | Windmoller & Holscher | Valved sack |
US20100008603A1 (en) * | 2008-07-09 | 2010-01-14 | Julie Rossing Smith | Sealable repulpable valve bag and method of assembling |
US8142077B2 (en) | 2008-04-16 | 2012-03-27 | Graphic Packaging International, Inc. | Bag structures and methods of assembling the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2136771A (en) * | 1983-03-24 | 1984-09-26 | Lolift | Containers for bulk material |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1185466B (en) * | 1961-08-11 | 1965-01-14 | Windmoeller & Hoelscher | Plastic valve sack and method and device for its manufacture |
US3235169A (en) * | 1962-04-09 | 1966-02-15 | Windmoeller & Hoelscher | Plastic valve bag |
-
1967
- 1967-06-01 GB GB25383/67A patent/GB1211696A/en not_active Expired
-
1968
- 1968-05-20 IL IL30033A patent/IL30033A/en unknown
- 1968-05-20 US US730384A patent/US3482762A/en not_active Expired - Lifetime
- 1968-05-30 DK DK252068AA patent/DK120520B/en unknown
- 1968-05-31 BE BE715980D patent/BE715980A/xx unknown
- 1968-05-31 FR FR1581548D patent/FR1581548A/fr not_active Expired
- 1968-05-31 SE SE07354/68A patent/SE330123B/xx unknown
- 1968-06-01 BR BR199428/68*7A patent/BR6899428D0/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1185466B (en) * | 1961-08-11 | 1965-01-14 | Windmoeller & Hoelscher | Plastic valve sack and method and device for its manufacture |
US3235169A (en) * | 1962-04-09 | 1966-02-15 | Windmoeller & Hoelscher | Plastic valve bag |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4095736A (en) * | 1976-10-22 | 1978-06-20 | International Paper Company | Bag closure having valve sleeve |
US4524460A (en) * | 1983-02-14 | 1985-06-18 | Windmoller & Holscher | Valved sack |
US8142077B2 (en) | 2008-04-16 | 2012-03-27 | Graphic Packaging International, Inc. | Bag structures and methods of assembling the same |
US20100008603A1 (en) * | 2008-07-09 | 2010-01-14 | Julie Rossing Smith | Sealable repulpable valve bag and method of assembling |
Also Published As
Publication number | Publication date |
---|---|
IL30033A0 (en) | 1968-07-25 |
FR1581548A (en) | 1969-09-19 |
BE715980A (en) | 1968-10-16 |
GB1211696A (en) | 1970-11-11 |
IL30033A (en) | 1971-12-29 |
DK120520B (en) | 1971-06-07 |
SE330123B (en) | 1970-11-02 |
BR6899428D0 (en) | 1973-02-06 |
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