US2213602A

US2213602A - Method of making a package

Info

Publication number: US2213602A
Application number: US250762A
Authority: US
Inventors: Yates John
Original assignee: Pneumatic Scale Corp
Current assignee: Pneumatic Scale Corp
Priority date: 1939-01-13
Filing date: 1939-01-13
Publication date: 1940-09-03
Anticipated expiration: 1957-09-03

Description

Sept. 3, 1940. J

J. YATES 7 METHOD OF MAKING A PACKAGE Filed Jan. 15, 1939 ATTORNEY Y Patented Sept. 3, 1 940 METHOD OF MAKING A PACKAGE John Yates, Quincy, Mass., assignor to Pncu matic Scale Corporation,

Limited, Quincy,

Mass., a corporation of Massachusetts Application January, 13, 1939, Serial No. 250,762

7 Claims.

This invention relates to a method of making a package and particularly to a method of making a. container for dispensing tea or other commodity.

The invention has for an object to provide a novel method of making a container of the socalled envelope type comprising a perforate bag made up of two sheets of material joined together at the marginal edges thereof to enclose the commodity, and which method substantially reduces the cost of manufacturing the container.

To this end the present method of combining two different materials to form the opposite sides of the container permits a wide range in the choice of materials comprising the opposite walls, one advantage being that the use of a substantial quality of material for one wall of the container permits the use of a les expensive or less-substantial quality of material for the opposite wall, the more substantial side being adapted to support the less substantial wall when the materials are combined to form a container for the purpose described.

A further and more specific object of the invention is to provide a novel method of adhesively combining two different materials such as Cellophane or parchment paper to form a container for dispensing a commodity such as tea by which the container may be produced in an economical, simple and practical manner.

With these general objects in view and such others as may hereinafter appear, the invention consists in the method and various steps thereof, hereinafter described and particularly defined in the claims at the end of this specification.

In the drawing, Fig. 1 is a diagrammatic view in perspective of one form of apparatus used in making the present bag and illustrates the method employed in adhesively combining the materials forming the two walls of the container; Fig. 2 is a view similar to Fig. 1 illustrating a modified form of the apparatus; Fig. 3 is a view illustrating still another modification of the apparatus shown in Fig. 1; Fig. 4 is a detail in cross-section taken on the line 4-4 of Fig. 1;

Fig. 5 is a similar view with the section being taken on the line 55 of Fig. 2, and Fig. 6 is another sectional view taken on the line 6-6 of Fig. 3.

In.the manufacture of the so-called envelope or pillow type bags for dispensing a commodity such as tea, the body of the container is usually formed from a single sheet of a textile fabric such as gauze by folding over a length of the material and sewing together the free marginal portions of the bag thus formed to enclose a charge of tea, coffee or other commodity therein. At the present time, tea. bags of this construction are produced by standard tea bagging machines of the construction illustrated in the United States patent to Dalton, No. 1,688,268, October 16, 1928.

One feature of the present invention aims to .provide a. method of making a package for dispensing tea from different materials such as perforated parchment paper, perforated "Cellophane and any of the various forms of filter paper which may be found suitable, or'from various combinations of such materials by longitudinally combining two separate webs of material to form one wide web having the two half sections composed of different materials or materials of different quality or characteristics, applying adhesive to the web thus formed and then folding the web along the longitudinal center line. The folded web thus formed may then be advanced and separate charges of tea or other commodity deposited between the folded sides at intervals. along the strip. The separate charges of the commodity are confined to the area of the strip onto which they are deposited and the longitudinal free edges of the strip are then pressed together to bring the adhesive surfaces in sealing engagement, thereby forming a tube containing separate charges of the commodity. After the tube has thus been formed the strip is severed to form bag sections and the transverse severed edges may be then pressed together in any usual or preferred manner to completely seal the bag along the adhesive coated surfaces. The. bag thus formed may have perforations through both walls thereof or through one wall only, leaving the other wall plain.

A wide range of materials may be used to produce a bag by the present method and the adhesive used may be any of the known composi tions of tasteless and odorless glues now, upon the market. For some purposes it may be preferred to use an adhesive of a type which may be permitted to dry out after being applied to the web and which may be thereafter sealed by heat and pressure. When the adhesive applied to the web is left in its moist condition, pressure alone may be used to press together the surfaces so coated to close the container.

Referring now to the drawing, which illustrates ing as to characteristics. The separate webs i6, 16 of such material are fed past adhesive applying devices 26, 22 which are adapted to apply adhesive to the longitudinal inner edges of each web. The webs are then passed over guide rollers sufficiently spaced apart to permit the adhesively coated surfaces to dry out and become non-tacky. The webs l6, II are then guided over rollers l6, 2| and'brought together in overlapping relation along. the adJacent longitudinal edges and the adhesively coated surfaces are pressed together by heated pressure rollers 24. The web Ill thus formed is then guided over a roller 26 and past an adhesive applying roll 26 which is adapted to apply adhesive along the outer longitudinal edges 26, 30 and also to apply transverse strips 62 of adhesive at intervals in the length of the web corresponding to the bag sections to be formed. After passing over guide rollers to permit the adhesive to become non-tacky the continuously advancing web is caused to pass around the guide roller 64 and between

creasing rollers

36, 36 which are arranged to form a crease along the longitudinal center line of the'web l6. The sides of the web are then folded upwardly and passed through a forming member 40. As the longitudinal folded strip is fed forwardly, separate charges ofv a commodity are deposited between the folds of the web by a-suitable. filling unit indicated diagrammatically at 42. The web may be gripped and advanced by suitable continuously travelling gripper units 44 which close upon the folded strip at points in advance of and behind the charge of tea or other commodity therein. The web then passes a second pair of heated pressure rollers 46 which seals the upper open edge of the strip toform a tube with the charges of the commodity deposited at intervals along the length thereof. While the strip is advancing continuously, knives 46, 56 operate upon the travelling strip at points midway between the adjacent gripper units 44 and sever the strip into bag sections each containing a charge of the commodity being packaged and held by a gripper unit 44. As the gripper units continue their advance, they are successively rotated through 'a quarter revolution as illustrated diagrammatically at 52 thus bringing the bag sections into position to bring one of the severed edges uppermost where it may pass between the pressure rollers 54, which are preferably heated and operate to seal one end of the bag.

The further advance of the gripper units 44 causes the grippers thereof to rotate successively through two quarter revolutions thus bringing the other end or severed edge of the bag section in uppermost position and in line with the heated pressure rollers 56. At this point in the process of producing the bag the usual handle comprising a tag 58 attached to a string may be affixed to one corner of the completely sealed container in any usual or preferred manner such as by a metal fastener 66.

From the description thus far and by reference to the drawing, it will be observed that the apparatus shown and described in the Dalton Patent No. 1,688,268, above referred to, may bevconveniently adapted to produce the present bag by replacing the sewing heads with pressure rollers. The apparatus for combining the two materials to form a single wide web and for applying adhesive thereto may be a separate unit or may be a part of the bag forming machine as herein diagrammatically illustrated.

- material, either of different material or differ- The form of apparatus illustrated in Fig.1 is adapted to join the overlapping adjacent edges of the material to form the folded bottom of the bag as clearly illustrated in Fig. 4.

A modification of the foregoing method is diagrammatically illustrated in Fig. 2 wherein the opposite walls of the container are adhesively secured face to face. The webs 62, 64 of the different materials are drawn from horizontally mounted rolls 66, 66 and are arranged to pass through the adhesive applying mechanism 16. The adhesive applying roll 12 is designed to apply strips of adhesive 14 upon the upper surface of the longitudinal edges of both webs and each web is provided with transverse strips of adhesive 16 conforming to the width of separate bag sections, as shown in Fig. 2. The webs thus prepared are advanced side by side and then folded upwardly towards each other so that the adhesively coated surfaces are face to face. The webs are first secured along the lower longitudinal edges by pressure rollers I6 which may be heated or not depending upon the composition of the adhesive used. In some instances it may be preferred to run the adhesive coated webs 62, 64 over rollers spaced apart to permit the adhesive to dry out, in the manner illustrated in Fig. 1, before threading the webs through the machine. thus formed is then passed through the guide member 66 to hold the upper edges apart while the separate charges of the commodity are deposited between the walls at intervals in the length of the strip. The remaining operations to be performed to seal the upper edge, sever the strip into bag sections and close the free edges of the container may be similar to those described in connection with Fig. 1. Thus the two webs 62, 64 comprising different kinds of materials or different grades of the same material are adhesively joined face to face along the lower longitudinal edges as clearly illustrated in Fig. 5.

Another modification of the present method is shown in Fig. 3. As therein illustrated the webs 62, 64 are drawn from the vertically mounted rolls 66, 86 of the material which has been previously supplied with adhesive and which has been permitted to dry so that the adhesively coated surface is nofi-tacky. The webs are guided-between pins 90, 92 and the upper longitudinal edges are sealed together by the heated pressure rolls 64. The strip thus fomied is turned back upon itself, that is, inside out, so as to confine the adhesively sealed edge within the strip as clearly shown in Fig. 6. The strip thus formed is then fed through the forming member 65 and the bags are formed and completed as hereinbefore described.

From the description thus far it will be ob-- served that the present method of producing the present package is such as to permit maximum economy in the choice of materials comprising the opposite walls of the container. Thus a high grade substantial material which will hold its shape when immersed in the hot water may be used for one side of the bag and a less expensive grade of material may be used for the other side, the more substantial side being adapted to support the opposite side when combined to form a bag, and the bag may be produced at minimum expense.

' While the preferred embodiments of the invention have been herein illustrated and described, it will be understood that the same may be embodied in other forms within the scope of the following claims.

The strip Having thus described the invention, what is claimed is:

1. The method of making a tea, coffee or simi lar bag which consists in advancing two separate strips of bag forming material side by side,

adhesively aifixing adjacent longitudinal edge portions to form a relatively wide web, then applying adhesive to the longitudinal edge portions of the relatively wide web and also in transverse strips spaced to correspond to the bags to be vformed, then folding the web along the longitudinal center line into substantially U-shape, depositing charges of the commodity at spaced intervals corresponding to the bags to be formed, confining the charges to the areas of the web upon which they are disposed and then pressing together the longitudinal free edges of the web to adhesively aflix the same, severing the web into bag sections and then pressing successively the transverse severed edges to adhesively aftfi)x the same and form the tea, coffee or similar 2. The method of making a tea, cofiee or similar bag which consists in advancing two strips of bag forming material having adhesive applied thereto to forma series of spaced bag forming sections, combining the strips along adjacent longitudinal edges to form a relatively wide web, then folding the web longitudinally into substantially U-shape, depositing successive charges of the commodity between the folded sides of the web and within said bag forming sections, and thereafter adhesively afiixing the adhesive portions of the web and severing the individual bag forming sections into individual filled bags.

3. The method of making a tea, coffee or similar bag which consists in advancing two strips of bag forming material having adhesive applied thereto to form a series of spaced bag forming sections, combining the strips along adjacent longitudinal edges to form a relatively wide web, then applying adhesive to the longitudinal edge portions of the relatively wide web and also in transverse strips spaced to correspond to the bags to be formed, then folding'the Web along the longitudinal center line into substantially U-shape, depositing charges of the commodity at spaced intervals corresponding to the bags to be formed, confining the charges to the areas of the web upon which they are disposed and then pressing together the longitudinal free edges of the web to adhesively afilx the same, severing the web into bag sections and then pressing successively the transverse severed edgesto adhesively afiix the same and form the tea, coffee or similar bag.

4. The method of making a tea, coffee or similar bag which consists in advancing two separate strips of equal width-of bag forming material side by side, adhesively aflixing' adjacent longitudinal edge portions in overlapping relation to form a relatively wide web, then applying adhesive to the longitudinal edge portions of the rela-* tively wide web and also in transverse strips bags to be formed, confining the charges to the g 3 areas of the web upon which they are disposed and then pressing together the longitudinal free edges of the web to adhesively afiix the same,

ing a quick drying adhesive to the longitudinal edge portions of the relatively wide web and also in transverse strips spaced. to correspond to the bags to be formed, permitting the adhesive to dry out, then folding the Web along the longitudinal center line into substantially U-shape, depositing charges of the commodity at spaced intervals corresponding'to the bags to be formed, confining the ,chargesto the areas of the web upon which they are disposed and then applying heat and pressure along the longitudinal free edges of the web to adhesively affix the same, severing the web into bag sections and then pressing successively the transverse severed edges to adhesively affix the same and form the tea, cofiee or similar bag.

6. The method of making a tea, coffee or similar bag which consists in advancing two separate strips of bag forming material side by side, adhesively afiixing adjacent longitudinal edge portions to form a relatively wide web, then applying adhesive to the longitudinal edge portions of the relatively wide web and also in transverse strips spaced to correspond to the bags to be formed, then folding the web along the longitudinal center line into substantially U-shape, depositing charges of the commodity at spaced intervals corresponding to the bags to be formed, confining the charges to the areas of the web upon which they are disposed and then pressing together the longitudinal free edges of the web to adhesively affix the same, severing the web into bag sections and then pressing successively the transverse severed edges to adhesively afiix the same, and affixing a handle comprising a tag attached by a string to one corner of the bag to form the tea, coffee or similar bag.

7. The method of making a tea, cofiee or similar bag which consists in advancing two separate strips of bag forming material side by side, adhesively aflixing adjacent longitudinal edge portions to form a relatively wide web, then applying adhesive to the longitudinal edge portions of the relatively wide web and also in transverse strips spaced to correspond to the bags to be formed, forming a crease along the longitudinal center line of the combined web, then folding the web along the longitudinal center line into substantially U-shape depositing charges of the commodity at spaced intervals corresponding to the bags to be formed, confining the charges to the areas 011 the web upon which they are disposed and then pressing together the longitudinal free edges of the web to adhesively afiix the same, severing the web into bag sections and then pressing successively the transverse severed edges to adhesively afiix the same and form the tea, coffee or similar bag.

JOHN YATES.