US2378285A - Bag valve - Google Patents

Bag valve Download PDF

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Publication number
US2378285A
US2378285A US231002A US23100238A US2378285A US 2378285 A US2378285 A US 2378285A US 231002 A US231002 A US 231002A US 23100238 A US23100238 A US 23100238A US 2378285 A US2378285 A US 2378285A
Authority
US
United States
Prior art keywords
valve
bag
sheet
corner
edge
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
US231002A
Other languages
English (en)
Inventor
Theron A Contryman
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.)
ST Regis Paper Co
Original Assignee
ST Regis Paper Co
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
Priority to NL69053D priority Critical patent/NL69053C/xx
Application filed by ST Regis Paper Co filed Critical ST Regis Paper Co
Priority to US231002A priority patent/US2378285A/en
Application granted granted Critical
Publication of US2378285A publication Critical patent/US2378285A/en
Priority to CH264924D priority patent/CH264924A/fr
Priority to GB1154/47A priority patent/GB620260A/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
    • 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

  • This invention relates to a valve bag, and has for its object to provide a bag with an improved valve.
  • One of the objects is to provide a valve flap with slots in its edge which facilitate proper folding of the valve edge to make a tight closure.
  • Another object is to provide an extension of the valve edge so as to make a more complete closure.
  • Another object is to provide a method by which such extension can be readily and economically positioned in the valve and placed in correct relation to thev other portions of the bag.
  • Another object is to secure portionsof the valve to the bag walls so as to facilitate folding of the valve along desiredlines.
  • Figure 1 is a view of the valve corner of a bag, with parts broken away to show the construction of the valve and its position in an empty bag;
  • Fig. 2 is a plan view of the supplemental sheet which is employed to form a valve extension
  • Fig. 3 is a'somewhat diagrammatic view illustrating the manner in which the supplemental sheet is inserted in the bag
  • Fig. 4 is a detail section on the line 4-4 of Fig.
  • bag Ill havin a gusseted side H, with a valve I 2 folded in at the corner of thebagand at the end of the gusset.
  • the end of the bag shown is closed by a reinforced seam l3.
  • a clutch sheet N which constitutes a valve extension.
  • This supplemental sheet is provided with a slot it along the front end of its bottom fold line, and with parallel slots lfiand I! in its sides slightly below themiddle of the sides.
  • This supplemental sheet may be attached to the folded-in corner of the bag in any suitable manner, but'the preferred method is merely to slip' it in between the plies of the inturned corner while the end of the bag is spread apart and the corner folded over, in the usual manner employed.
  • the rear edge, of the supplemental sheet may be cut oif at l8 and is so easily and quickly placed in position with sufficient accuracy.
  • the lower lip' ofthe valve at one time during the closing of the valve, form a chord across the arc of the upper side of the valve which lies against the walls at the end of the bag. Thereafter continuing pressure of material against this chord folds it upwards against' the end of the bag.
  • Slots l6 and H are preferably so spaced" as to obtain the chordasrases be readily understood that a supplemental valve sheet may be placed in position in a bag corner, as illustrated in Fig. 3, and then the edges of the bag folded over each other and pasted together in the usual manner for forming a pasted-end bag, if desired.
  • adhesive may be applied to the under side of the supplemental sheet, as indicated In the closing of the valve, even with the paper weakened along the preferred fold lines there is danger of some irregularity in operation. Where the paper is merely out along lines II, II and t1, the edges sometimes abut and cause crumpling. In the construction shown, there are slots of appreciable width formed along these lines.
  • slots may be made somewhat less in width than shown in the drawings where they are exaggerated somewhat for purposes of illustration. With slots of the form shown, a tapered or slanting closure of the valve lip will ordinarily result in overlapping of the edges of the supple-' mental sheet along these slots without abutting or causing crumpling. This result may be accomplished by acuteV-shaped cuts instead of the slots shaped .as shown in the drawings, but the shape of slots illustrated is convenient to manu- I facture and operates satisfactorily.
  • the preferred construction is to have slots is and I1 slightly lower than half-way between the bottom of the valve and in Fig. 1. As indicated above, this may be conveniently arranged so that the lower portion between slots l8 and I! will form a chord across the arc of the upper portion between those slots and the seam, but in the final closing of the valve this chord should be pressed up against the over-lying arc. In order to do this, the fold lines at the edge are changed somewhat.
  • the slots facilitate this operation. For example, the paper may start to bendalong the bottom of the slot, and then pull up in the final closing operation so that the final fold lines are at the tops of the slots.
  • supplemental sheet de- I closing seam when the valve is collapsed as shown 1 scribed may be retained where the sheet is merely placed upon and adhered to the corner of the bag while it is spread as shown in Fig. 3. instead of being inserted between the plies.
  • a bag having one corner turned in to form a valve and a supplementary sheet extending inward from said intumed corner, said sheet being normally folded along one line when the bag is empty and being folded along different lines to close the,valve opening after the bag is filled, the edge of the sheet being provided with a slit along each of said lines and being unslit between .said lines, and the sheet being attached to the bag walls beyond the inturned corner and adjacent the slits along which the valve is folded after the bag is filled.
  • a method 01 making a valve bag which comprises spreading apart the sides of a multiply bag tube and flattening one corner of the tube, slipping a supplementary" sheet between the plies of the flattened corner, adhering the supplemental 1 237a,? I 3 sheet to'the be: well beyond butneer the edge or the 'corner and adjacent a line where it is de-. sired that the valve shall told after the bag has been filled, while leaving said sheet unadhered to the flattened corner across the central longitudinal line-of the corner, and thereafter bringing V stud sides together and forming an end closure for the bag.
  • a method or making a valve bag which com-' prises spreading apart the side: of a multiply bag 10 tube and flattening thecorner of the tube, slippin: a supplementary sheet between the plies of the flattened comer, adhering the supplemental sheet to 9. ply ofthe corner and to the inner side 0! the bag wall at the edge 0! the corner and adjacent a. line where it is desired that the valve shall told after the bag has been filled and thereafter bringing said sides together and forming an end closure for the bag.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
US231002A 1938-09-21 1938-09-21 Bag valve Expired - Lifetime US2378285A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL69053D NL69053C (en)) 1938-09-21
US231002A US2378285A (en) 1938-09-21 1938-09-21 Bag valve
CH264924D CH264924A (fr) 1938-09-21 1946-11-20 Sac en papier.
GB1154/47A GB620260A (en) 1938-09-21 1947-01-13 Improvements in bag valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US231002A US2378285A (en) 1938-09-21 1938-09-21 Bag valve

Publications (1)

Publication Number Publication Date
US2378285A true US2378285A (en) 1945-06-12

Family

ID=22867404

Family Applications (1)

Application Number Title Priority Date Filing Date
US231002A Expired - Lifetime US2378285A (en) 1938-09-21 1938-09-21 Bag valve

Country Status (4)

Country Link
US (1) US2378285A (en))
CH (1) CH264924A (en))
GB (1) GB620260A (en))
NL (1) NL69053C (en))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478113A (en) * 1940-11-12 1949-08-02 St Regis Paper Co Valve bag
US2528419A (en) * 1948-07-30 1950-10-31 St Regis Paper Co Bag valve
US2573230A (en) * 1948-06-11 1951-10-30 Michael J Strauss Bag valve
DE861352C (de) * 1950-07-02 1952-12-29 Natronzellstoff Und Papierfabr Ventilboden mit innenliegendem Bodenblatt
US2643588A (en) * 1949-09-29 1953-06-30 St Regis Paper Co Mechanism and method for forming sleeved valve bags
DE883394C (de) * 1948-12-22 1953-07-16 Maschb Honsel & Co Kreuzbodenventilsack und Verfahren zu seiner Herstellung
US2815165A (en) * 1954-12-03 1957-12-03 Bemis Bro Bag Co Bag
US3000550A (en) * 1958-06-04 1961-09-19 Hudson Pulp & Paper Corp Valve sleeve for bags
US3050235A (en) * 1960-09-01 1962-08-21 Du Pont Canada Double valve bag
US3235169A (en) * 1962-04-09 1966-02-15 Windmoeller & Hoelscher Plastic valve bag

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199118B (de) * 1962-02-05 1965-08-19 Windmoeller & Hoelscher Kreuzbodenventilsack und Vorrichtung zu seiner Herstellung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478113A (en) * 1940-11-12 1949-08-02 St Regis Paper Co Valve bag
US2573230A (en) * 1948-06-11 1951-10-30 Michael J Strauss Bag valve
US2528419A (en) * 1948-07-30 1950-10-31 St Regis Paper Co Bag valve
DE883394C (de) * 1948-12-22 1953-07-16 Maschb Honsel & Co Kreuzbodenventilsack und Verfahren zu seiner Herstellung
US2643588A (en) * 1949-09-29 1953-06-30 St Regis Paper Co Mechanism and method for forming sleeved valve bags
DE861352C (de) * 1950-07-02 1952-12-29 Natronzellstoff Und Papierfabr Ventilboden mit innenliegendem Bodenblatt
US2815165A (en) * 1954-12-03 1957-12-03 Bemis Bro Bag Co Bag
US3000550A (en) * 1958-06-04 1961-09-19 Hudson Pulp & Paper Corp Valve sleeve for bags
US3050235A (en) * 1960-09-01 1962-08-21 Du Pont Canada Double valve bag
US3235169A (en) * 1962-04-09 1966-02-15 Windmoeller & Hoelscher Plastic valve bag

Also Published As

Publication number Publication date
GB620260A (en) 1949-03-22
NL69053C (en))
CH264924A (fr) 1949-11-15

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