US2189431A - Method of making impervious bags - Google Patents

Method of making impervious bags Download PDF

Info

Publication number
US2189431A
US2189431A US81981A US8198136A US2189431A US 2189431 A US2189431 A US 2189431A US 81981 A US81981 A US 81981A US 8198136 A US8198136 A US 8198136A US 2189431 A US2189431 A US 2189431A
Authority
US
United States
Prior art keywords
container
impervious
lacquer
bag
package
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
US81981A
Inventor
Moore George Arlington
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.)
HUMOCO Corp
Original Assignee
HUMOCO CORP
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 HUMOCO CORP filed Critical HUMOCO CORP
Priority to US81981A priority Critical patent/US2189431A/en
Application granted granted Critical
Publication of US2189431A publication Critical patent/US2189431A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/84Specific machine types or machines suitable for specific applications
    • B29C66/861Hand-held tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30Electrical means
    • B29C65/305Electrical means involving the use of cartridge heaters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43122Closing the top of gable top containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8221Scissor or lever mechanisms, i.e. involving a pivot point
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8227Transmission mechanisms using springs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8324Joining or pressing tools pivoting around one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D5/00Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/067Gable-top containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12Paper, e.g. cardboard
    • B29K2711/123Coated

Description

Feb. 6, 1940. G. A. MOORE METHOD OF MAKING IMPERVIOUS BAGS Filed May 27, 1936 BY mm M ATTORNEY Patented Feb. 6, 1940 UNITED STATES METHOD OF MAKING IMPERVIOUS BAG S George Arlington Moore, Louisville, Ky., assignor to Humoco Corporation, Louisville, Ky., a corporation of Delaware Application May 27, 1936, Serial No. 81,981

3 Claims.

This invention relates to containers and more particularly to containers comprising fibrous materials and to a method and means for sealing the same.

5 It has been hereto-fore proposed to seal the ends or seams of'containers made of waxed paper 'by the application of heat and pressure thereto. the wax body being thus rendered eilective to hold the adjacent surfaces of the container together. Joints or seams formed in this manner. however, are not impervious to air under all conditions; the joints are always weak as surface tension is relied upon, the seal formed thereby is easily broken, thus necessitating very careful handling. Said wax joints or seams become particularly weak when the package is subjected to merely ordinary room temperatures in hot seasons, thus resulting in the breaking of the package at the joints or seams and loss of the contents thereof.

It has also been proposed to seal packages made of wax impregnated fibrous materials by applying a solvent activatable adhesive to a marginal unwaxed portion of the open end or joints thereof. 25 This method of sealing not only increases the cost and difllculties involved in the manufacture of the bag but, in addition, subjects the contents to contamination during the step of activating said adhesive. Furthermore, it is extremely dirficult, if not impossible, to seal a container in this manner and render the same impervious to both air and moisture under all conditions of temperature and humidity. It is also a wellknown fact that fibrous materials such as paper 35 or cardboard are weakened bodily when soaked with liquid parafiin or the like or when dampened with adhesive activating solvents.

It is accordingly an object of this invention to provide a novel sanitary container made at least 40 in part of fibrous materials which is adapted to be readily sealed and which can be impervious to air and moisture.

Another object is to provide novel means for simultaneously sealing a package and forming a 45 line of severance without impairing the imperviousness of the seal whereby the package may be readily opened for dispensing the contents thereof.

Still another object is to provide a novel and sanitary fibrous package formed from a single blank which is impervious to air and moisture,

and a novel method for making same.

A further object is to provide an impervious package of fibrous materials wherein the fibers of the material are not weakened in the process of manufacture, such as by impregnating the same with paraflin wax.

Another object is to provide a novel bag or container which can be securely closed without the use of string, gum tape, etc. 5

The above and further objects and novel features of the invention will more fully appear from the following detailed description when taken in connection with the accompanying drawing. It is to be expressly understood, how- 10 ever, that the drawing is for the purpose of illustration only and is not designed as a definition of the limits of the invention, reference being primarily had for this purpose to the appended claims.

In the drawing, wherein like reference characters refer to like parts throughout the several views,

Fig. 1 is an isometric view of one form of package which may be employed in carrying out the present invention, the same being shown with one end open;

Fig. 2 is a similar view showing the container after the open end has been sealed;

Fig. 3 is a side elevation of one form of apparatus which may be used to seal the open end of the package of Fig. 1;

Fig. 4 is a front elevation of said apparatus with parts thereof broken away; and,

Fig. 5 is an enlarged detail view of the heating irons of the device of Fig. 3.

The single embodiment of the invention illustrated is shown, by way of example, as comprising a paper bag ill of the same type and texture as paper bags commonly employed in grocery stores for packaging bulk foods or the like. Bag in is preferably constructed of a single sheet or blank or fibrous material such as paper, folded in any suitable or weli-known manner to form a container having at least one end thereof open as seen in Fig, 1. In the form shown, the blank is folded so as to form a container of rectangular cross-section, the ends of the blank being brought into overlapping relation to form a vertical joint or seam ii. The bottom is thereafter formed by folding a marginal portion of the blank in the usual or any suitable or desirable manner. In view or the many common methods in which the paper may be folded to form the bottom of the container, it is believed to be unnecessary to show any specific embodiment.

In order to render bag or package I. impervious to air and moisture for the purpose of preserving the contents to be sealed therein, the side of the blank constituting the inner surface of the bag sealing {30 is coated with a thin, dry film I2 of a thermoplastic lacquer having potential cementing qualities. As an example, said film may be composed of a nitro-cellulose lacquer having thermoplastic qualities, or for some purposes cellulose acetate may be advantageously employed. The lacquer or acetate film constitutes an impervious coating whichwill increase rather than impair the tensile strength of the fibrous material, and the adhesive qualities thereof may be utilized in the construction and sealing of the container, as will morefully appear hereafter. Lacquer film I2 is preferably constituted by a lacquer that may be activated or rendered tacky by a solvent, by heat, or by both, and when heat alone is used as an activating agent said lacquer should be rendered tacky only attemperatures considerably in excess of usual room temperatures,- for example 130 to 150 F.

While lacquer coating or film I2 may be placed on the innner surface of bag III by means of a spray, for example, after the latter is formed in the usual or any well-known manner, it is preferable to apply the film to the surface of the blank before the same is folded to form a container of the desired shape. The cementing qualities of the lacquer may thus be utilized in the construction ofthe container to firmly and im- 1 form a strong, impervious bond between the same.

The bond thus formed will not be weakened when the package is subjected to a wide variation of room temperatures in any season, since the lacquer is affected only by comparatively high temperatures,

One. suitable lacquer which may be employed to form the coating onthe inner surface of container I0 is composed of about 65 percent of ester solvents, such as ethyl acetate, butyl acetate or the like, and such hydro-carbon as toluol, and about 35 percent of solids which. can be readily activated by solvents as well as heat. The solids content is composed of about 25 percent of low viscosity nitro-cotton, 60 percent of resins and about 15 percent of a plasticizer such as dibutyl phthalate. The resins employed may contain some gums, such as ester gum, but usually synthetic resins which have more definite physical properties than any natural resin are used. This lacquer is free from tack at room temperatures 'and under normal conditions of humidity. Contact temperatures for forming seals at the overlapped portions of the blank from which container I 0 is constructed must be in excess of F., the excess being dependent upon the speed of operation and the conductivity of the materials used. The above lacquer is also adapted to harden quickly after activation and accordingly permits rapid operation of the sealing machinery.

It has'been the practice heretofore, particularly in grocery stores and similar places of business, to fill uncoated paper packages or bags similar to the above and tie the same with cord or employ a separate adhesivecoated strip to hold the closing foldsof the open end in place. Much time is unnecessarily consumed in closing bags in this manner and the resulting closure Heat and pressure may be apis not impervious to air and moisture and is subject to leakage. With the novel bag constructed in the manner above described, the open end thereof may be readily and quickly closed and bonded by an impervious seal after the desired contents have been placed therein. The grocer or other merchant is thus enabled to package bulk foods and those which are apt to deteriorate when subjected to atmospheric conditions of temperature and humidity in an inexpensive, impervious package. Such articles, even though hygroscopic, may thus be packaged and retained on the shelves for sale during an indefinite period without danger of deterioration.

In the embodiment of the invention illustrated narrow strips I3 at the upper margins of two opposed sides Illa, Illa of the container are also coated with a thin, dry film of thermoplastic lacquer of the character above described. The

'open end of the container may thusbe sealed-by merely pressing or folding the sides .Illa, lIla of container Ill inwardly, as indicated by dotted lines in Fig. 2, thereby causing opposite endsof strips I3 to engage one another, and simultaneously pressing the inner coated surfaces of the marginal edges of sides IIlb, IIlb, into engagement with each other in a manner which will be readily apparent from an inspection of the drawing.

It will be noted that in folding the upper margins of sides Illa, Illa along the folding lines or creases a, b,which may be provided if desired, the edges of said sides drop below the upper edges of sides IUb, Illb. It will of course be understood that the thickness of the material from which the bag I0 is fabricated is exaggerated in the drawing for the purpose of clarity. Heat and pressure sufiicient to activate film I2, I3 are then simultaneously applied to the outer surfaces of the marginal portions of sides lIlb to complete the seal, the heat activated adhesive being pressed into the interstices of the paper to form an impervious bond. With the sides Iflb entirely coated with thermoplastic lacquer, the closure seal may be made at any point throughout the length of the bag in case the latter'is not completely filled.

Novel portable apparatus suitable for use on the counter in a retail store is provided for forming the closure seal above described and for simultaneously. producing indentations and corriplementary ridges constituting a line of severance adjacent said seam without impairing the impervious character thereof whereby the package may be readily and neatly opened for dispensing the contents thereof. In the illustrated form, said apparatus comprises a stand I4 having a pair of axially spaced trunnions I5, I5 in which a shaft I6 is rotatably journaled. Keyed or otherwise suitably secured to said shaft between trunnions I5 is a handle I1. A U-shaped pressure and heating member comprising a pair of arms I8, l8 having hub portions keyed to shaft l6 and a heating and pressing iron I9 joining the lower ends of said arms is adapted to be pivotally moved by handle I! so that the inner surface of said iron will move into parallel relationship and cooperate with the fiat face of an iron 20 which is secured to a portion 22 mounted on stand I4 directly below trunnions I5.

Any suitable means may be provided for heating members I9 and 20 .to desired temperatures,

I such means as shown being constituted by elecscribed.

'ruptedlineacrossthe faceofsealingiron amass:

iacent member 2l.- Ilements ll may be connected to any suitable source of electric current through leads II.

In order that the bag may be readily opened after being sealed by the apparatus above dea plurality of 'wedge shaped beads 24 may be provided in a horizontal inter- II edge thereof and a plurality (Fig.

adiacent the lower Thus, when the upper endof the bag ll, after the same is folded in the manner illustrated and above described, is held between parts II and II and pressure is applied by pressing downwardly on the outer end of handle ll, films I! and I! will be activated at the points of heat application, 1. e., throughout the width of the container, and pressed into the interstices of the paper to form an impervious bond between the engaging surfaces. At the same time, through the cooperation of beads 24 and grooves 25, a line of indentations I! (Fig. 2) is produced adjacent the lower edge of the seam, thereby forming a line of severance whereby the container may be readily opened. Since the pressure applied by beads 23 on one side of the seal isrelieved by grooves 24 on the opposite side, it will be seen that the paper will not be ruptured nor the impervious character of the package impaired.

Any suitable means, such as coil springs 11, interposed between stand is and arms it, may be provided for normally holding the faces of sealing irons I. and II out of engagement. If desired, suitable cutting means may be provided adjacent the upper edges of members is and II for trimming any excess paper from the top of the container simultaneously with the making 01' the closure seam.

There is thus provided a novel, fibrous bag or package which may be readily and inexpensively manufactured and anovel method and means for constructing the same and sealing a commodity therein, whereby the latter will notonlybe protected from air and moisture outside the bag but will retain the moisture which is in the contents at the time of packing. A neat appearing package which may be readily opened is also thus provided.

Although only a single embodiment of the invention is illustrated and ducribed in detail, expressly understood that the same not limited thereto but that various changes in the design and arrangement of asinthesiaeand shapecfthe without departing from the spirit invention, as will now be apttothoaelkilledin theart. Incertainin- .gss

Incarryingoutthemethodof present invention, it mayproveusefulto container.

- 3 employ a solvent in addition to heat for cementing the vertical seam and bottom folds. The top seam, however, is preferably made by the application of heat only. The thermoplastic lac-. quer characteristics such that the bags, prior to use, may be stored for long periods of time without any danger of the lacquer becoming tacky or that temperature changes will cause the parts to adhere one to the other, whereby the usefulness of the bags would be destroyed, as would be the case if common adhesives, such as animal or vegetable glue, were used to seal the bag. For a definition of the limits of the invention, reference will be had primarily to the appended claims.

What is claimed is:

l. The method of forming end-closure on a container having a mouth at one end thereof U which consists in tucking the ends of said mouth inwardly and drawing the inner surface of the sides of said mouth into contact with each other and with the inner surfaces of the tucked ends of said mouth, applying heat and pressure to activate a lacquer coating on said engaging surfaces to cement said surfaces together and form an impervious seal across said mouth, and si-' multaneously impressing a plurality of aligned indentations in said sealed portion across the width of said container to provide a line of severance whereby the container may be readily opened.

2. The method of closing an open ended concoating the inner surface tainer which includes of the margin and two oppositely disposed portions of the outer surface of the margin at the open end of the container with a thin, dry film of thermoplastic lacquer having potential adhe-. sive qualities, tucking the double coated portions of the margin inwardly and simultaneously drawing the single coated portions of the margin into contact, applying heat and pressure to the engaging surfaces to activate said coating for adhesively securing said eng ing surfaces together to form an impervious seal across said open end, and impressing a plurality of indentations and complementary ribs across the width of said .container to provide a line of severance whereby the same may be readily o 3. The method of forming an end closure on a paper container formed of flexible sheet material which consists in tucking the ends of the mouth of said container inwardly to thereby flatten the end of the container, applying heat and pressure to the margin of the flattened end to activate a dry coating of thermoplastic lacquer on the engaging surfaces of said margin to adhesively secure said surfaces together and form an impervious seal across said mouth, and simultaneously impressing a plurality of aligned indentations and complementary ribs in said seal to provide a line of severance for opening the GEORGE ARLINGTON MOORE.

US81981A 1936-05-27 1936-05-27 Method of making impervious bags Expired - Lifetime US2189431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US81981A US2189431A (en) 1936-05-27 1936-05-27 Method of making impervious bags

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81981A US2189431A (en) 1936-05-27 1936-05-27 Method of making impervious bags

Publications (1)

Publication Number Publication Date
US2189431A true US2189431A (en) 1940-02-06

Family

ID=22167637

Family Applications (1)

Application Number Title Priority Date Filing Date
US81981A Expired - Lifetime US2189431A (en) 1936-05-27 1936-05-27 Method of making impervious bags

Country Status (1)

Country Link
US (1) US2189431A (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443749A (en) * 1946-01-19 1948-06-22 Benjamin J Audette Sealing device
US2493348A (en) * 1944-09-21 1950-01-03 St Regis Paper Co Bag with extensile sealed liner
US2514255A (en) * 1945-03-01 1950-07-04 Shellmar Products Corp Article of manufacture and method
US2524030A (en) * 1942-10-05 1950-10-03 Bemis Bro Bag Co Method of closing bag tube ends
US2528778A (en) * 1945-03-01 1950-11-07 Shellmar Products Corp Sealed tobacco package
US2575544A (en) * 1949-01-26 1951-11-20 Jr Julius A Zinn Method and apparatus for closing and sealing containers
US2579088A (en) * 1949-10-25 1951-12-18 Shellmar Products Corp Heat sealing tool
US2589756A (en) * 1949-06-10 1952-03-18 Harry F Waters Heat-sealing machine
US2750102A (en) * 1953-12-04 1956-06-12 Truman D Thurman Envelope
US2851212A (en) * 1956-01-03 1958-09-09 Delphin J Parmer Opening device for bags
US2952399A (en) * 1955-07-05 1960-09-13 Arkell And Smiths Multiwall bag construction
US3038651A (en) * 1961-02-23 1962-06-12 L I Snodgrass Company Lined bag
US3041802A (en) * 1954-11-24 1962-07-03 Nicholas A Cummings Method of forming a sealed conical container
US3071308A (en) * 1957-03-20 1963-01-01 Lange Ferdinand Folding containers
US3120335A (en) * 1961-09-07 1964-02-04 Ex Cell O Corp Container with infolded bottom closure
US3128936A (en) * 1964-04-14 Heat sealable container
US3148824A (en) * 1963-02-04 1964-09-15 Container Corp Severance line construction for cartons
US3179327A (en) * 1962-05-24 1965-04-20 Dow Chemical Co Film tear line
US3186628A (en) * 1964-03-27 1965-06-01 Tower Packaging Company Packaging
US3322328A (en) * 1965-10-04 1967-05-30 Modern Album And Finishing Inc Container
US5630544A (en) * 1995-08-25 1997-05-20 Shane; Penny K. Food products container with pocket
US5697707A (en) * 1995-10-23 1997-12-16 Esposito; David P. Compartmentalized food and beverage bag with reinforcement shields
US5967665A (en) * 1997-12-04 1999-10-19 Kimberly-Clark Worldwide, Inc. Flexible polymer packaging bag with easy-open end seal feature
WO2003080447A1 (en) * 2002-03-22 2003-10-02 Ica Spa Fabrication of a bag package starting from a reel of simple paper
US20050276938A1 (en) * 2004-05-25 2005-12-15 Mccormick Demetrius T Adhesive for bag sealing application

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128936A (en) * 1964-04-14 Heat sealable container
US2524030A (en) * 1942-10-05 1950-10-03 Bemis Bro Bag Co Method of closing bag tube ends
US2493348A (en) * 1944-09-21 1950-01-03 St Regis Paper Co Bag with extensile sealed liner
US2514255A (en) * 1945-03-01 1950-07-04 Shellmar Products Corp Article of manufacture and method
US2528778A (en) * 1945-03-01 1950-11-07 Shellmar Products Corp Sealed tobacco package
US2443749A (en) * 1946-01-19 1948-06-22 Benjamin J Audette Sealing device
US2575544A (en) * 1949-01-26 1951-11-20 Jr Julius A Zinn Method and apparatus for closing and sealing containers
US2589756A (en) * 1949-06-10 1952-03-18 Harry F Waters Heat-sealing machine
US2579088A (en) * 1949-10-25 1951-12-18 Shellmar Products Corp Heat sealing tool
US2750102A (en) * 1953-12-04 1956-06-12 Truman D Thurman Envelope
US3041802A (en) * 1954-11-24 1962-07-03 Nicholas A Cummings Method of forming a sealed conical container
US2952399A (en) * 1955-07-05 1960-09-13 Arkell And Smiths Multiwall bag construction
US2851212A (en) * 1956-01-03 1958-09-09 Delphin J Parmer Opening device for bags
US3071308A (en) * 1957-03-20 1963-01-01 Lange Ferdinand Folding containers
US3038651A (en) * 1961-02-23 1962-06-12 L I Snodgrass Company Lined bag
US3120335A (en) * 1961-09-07 1964-02-04 Ex Cell O Corp Container with infolded bottom closure
US3179327A (en) * 1962-05-24 1965-04-20 Dow Chemical Co Film tear line
US3148824A (en) * 1963-02-04 1964-09-15 Container Corp Severance line construction for cartons
US3186628A (en) * 1964-03-27 1965-06-01 Tower Packaging Company Packaging
US3322328A (en) * 1965-10-04 1967-05-30 Modern Album And Finishing Inc Container
US5630544A (en) * 1995-08-25 1997-05-20 Shane; Penny K. Food products container with pocket
US5697707A (en) * 1995-10-23 1997-12-16 Esposito; David P. Compartmentalized food and beverage bag with reinforcement shields
US5967665A (en) * 1997-12-04 1999-10-19 Kimberly-Clark Worldwide, Inc. Flexible polymer packaging bag with easy-open end seal feature
WO2003080447A1 (en) * 2002-03-22 2003-10-02 Ica Spa Fabrication of a bag package starting from a reel of simple paper
US20050276938A1 (en) * 2004-05-25 2005-12-15 Mccormick Demetrius T Adhesive for bag sealing application

Similar Documents

Publication Publication Date Title
US3347444A (en) Package having an oblique opening indication
US3595468A (en) Opening device
US3315801A (en) Dispenser package
US3613874A (en) Reclosable package
US3462070A (en) Closure for flexible packages
US3563371A (en) Wet towel package
US2991001A (en) Resealable container
US2621142A (en) Cushioned pad for use in jewelry boxes and method of making same
US3130647A (en) Duplex packaging material and method of making same
US4252238A (en) Package for a stack of refreshers
US2196666A (en) Method and means of making containers
US2998340A (en) Bags
US3259507A (en) Heatsealable seal and food package utilizing same
US2344369A (en) Package
US3154239A (en) Resealable bag
US3608707A (en) Package closure
US2607696A (en) Process of forming a food package
US3687356A (en) Gusseted type bags
US3113673A (en) Multi-unit package
US2446308A (en) Package
US3807626A (en) Gusseted pinch bottom breakaway pouch bag
US3117874A (en) Infant food package
JP3902771B2 (en) Method of manufacturing a package for compressible product and its packaging
US2635788A (en) Package
US3373926A (en) Seamed container with easy opening feature