US1951011A

US1951011A - Paper bag

Info

Publication number: US1951011A
Application number: US393354A
Authority: US
Inventors: Theodore S Falk
Original assignee: CONTINENTAL PAPER AND BAG CORP
Current assignee: CONTINENTAL PAPER AND BAG Corp
Priority date: 1929-09-18
Filing date: 1929-09-18
Publication date: 1934-03-13
Anticipated expiration: 1951-03-13

Description

March 13, 1934. T. s. FALK 1,951,011

- PAPER BAG Filed Sept. 18. 1929 2 Sheets-Sheet 1 a INVENTOR Theodare 5. ("Z/A1 ATTORNEY? March 13, 1934. T. s FALK 1,951,011

P APER BAG Filed Sept. 1811929 2 Sheets-Sheet 2 1 22 INVENTOR Theodore J. fa/A.

A TTORNE Y5 Patented Mar. 13, 1934 UNITED STATES 1,951,011 I PAPER BAG Theodore S. Falk, Brooklyn, N. Y., assignor to Continental Paper and Bag Corporation, New

York, N. Y., a corpor ation of Delaware Application September is, 1929, Serial No. 393,354

9 Claims.

It is a further object of the invention to provide a method of making such bags which will,

enable the bags to be made on the same machines as are now employed for the making of square bags of the satchel type.

Other objects and advantages will hereinafter appear. 1

In the drawings forming part of this specification:

Figure 1 is a fragmentary, side view of a pa- I per tube from which the bag blanks are formed;

Figure 2 is a side view of a single bag blank with a portion folded back to reveal certain details of structure;

. Figure 3 is a view similar to Figure 2, but showing the bag blank at a more advanced stage in the process of manufacture;

Figure 4 shows the same bag blank a step nearer completion; I

Figure 54s a view similar to Figure i, show ing the bag completed;

Figure 6 is a perspective view of the completed bag after the same has been opened up;

Figure 7 is a bottom, plan view of the completed and opened bag; and

Figure 8 is a top, plan view of the completed and opened bag.

The bags of the type illustrated are made from a continuous paper tube 1, the tube being creased and folded in the maner illustrated in Figure 1,

4p and then severed into individual blanks, such as 2. The illustratedbag is designed to be hexagonal, and hence the tube 1 is subdivided by creases into six lateral panels comprising front and back panels 3 and 6, and side panels 4, 5,

4o

7 and 8, all of equal width. The side-panels t, 5, '7 and 8 are foded in between the front panel 3 and the back panel 6 to form

gussets

9, 10, 11 and 12, the gussets being of about one-fourth the width of a panel. Thus, each of the side panels has about one-half of its width disposed between the front and back panels, and the other half protruding beyond the side boundary of the back panel, the total width of the blank, when folded as illustrated in Figure 1 and pressed out :3 fiat being substantially double the width of a single panel. This width relationship is important for the reason that by subsequent folding and pasting operations the width of the blank, as seen in Figure 1, is permanently fixed as the distance between opposite vertices of the hexagonal bottom of the bag when the same is final- 1y completed and opened. This distance is therefore equal to the diameter of a circle circumscribed about the bottom of the bag, and must be substantially equal to double the length of a side of the base, if the base is to form a substantially regular hexagon.

When a blank 2 has been severed from the continuous tube 1, the creases along the vertices of the gussets are slit for a short distance, the slits being designated 13 in Figure 2. These slits are all of equal length and desirably extend for a distance not greater than one quarter of the width of a panel. Afterthe slitting operation has been performed, the back panel 6 is held down, while the front panel 3 is folded back to a posi tion like that shown in Figure 3. This forms bottom panels 14- from the side panel material, each in the form of an isosceles right tiiangle 15 having a projecting rectangular flap or margin 16 extending toward the middle of the bag. It will be observed that the legs of these triangular panels extend only to the bottoms of the slits l3, and not to the end edges of the front and rear 7 panels. The diagonal 1! of the figure formed by the two triangular panels 14 and the space intervening between them forms a diagonal of the finished bag bottom. When the bottom panels have been formed as described, adhesive is smeared upon the surfaces bounded by the lines a, a and b, b of Figure 3.

The left hand half of this figure, as seen in Figure 3, or in other words the halves of the panels 14 which are formed by the material of the front portion of the bag is now folded to the right, as seen in Figure 4, the crease being formed along a line 18 which extends parallel to line 1? and substantially midway between the line i? and the bases of the slits 13. To secure methernatical accuracy the line 18 should be located at a distance from the line 1'7 equal to one half of the apothem of the hexagonal bottom of the finished and opened bag, or in other words at a distance equal to .4325 times the width of a lateral panel, but in practice considerable variation is permissible without objectionably affecting the shape and utility of the finished bag. This folding brings the left extremities of the panels 14, as seen in Figure 3, nearly into registry with the center line 17, so that the blank takes the form shown ill) in Figure 4. The front panel 3, however, has a marginal portion which extends a substantial distance beyond the center line 17, this marginal portion being provided by reason of the provision of the slits 13.

The right hand half of the figure formed by the panels 14 is next similarly folded toward the left about a line 19, to a position like that shown in Figure 5. The previously applied adhesive retains the folded over portions in place so that the bag, as seen in Figure 5, is in a fiat condition and ready to be shipped for use.

It will be seen that the folded over

portions

20 and 21 are united adhesively to both of the panels l l and are united adhesively to one another. The irregular hexagonal bottom disclosed in Figure 5 is, therefore, fixed in shape and has a longer diagonal of fixed length, such diagonal being equal to twice the width of a panel.

A bag constructed in the manner described may be unfolded to the form illustrated in Figures 6, 7 and 8 when it is to be used. A crease formed along the line 1'7 of Figure 3 will fall at the periphery of the bottom of the unfolded bag along all sides thereof. When opening the bag the gussets are spread outwardly and disappear, serving in part to form the small triangular portions 22 of the bottom of the bag, and in part to form the sides of the bag.

The bag constructed as described is formed by substantially the same series of manipulative steps by which square bags of ihe satchel type are formed, the chief point of difference consisting in the subdivision of the bag material into six panels, and the formation of gussets of appropriate depth fromthe side panel material prior to the formation of the bottom of the bag.

I have described what I believe to be the best embodiment of my invention. I do not wish, however, to be confined to the embodiments shown, but what I desire to cover by Letters Patent is set forth in the appended claims.

I claim: I i

1. The method of making a paper bag having a bottom in the form of a regular hexagon which comprises providing a tubular paper bag blank subdivided by longitudinally extending creases to form front and back panels and four side panels all of substantially equal width, with gussets formed of the side panel material lying between the front and back panels, drawing the front half of the bag at one end away from the rear half throughout its entire width and folding it back to form fiat bottom panels of the side panel material with portions of the bottom panels protruding beyond the lateral bounds of the front and back panels, and oppositely folding in end portions of the front and back halves of the blank into overlapping relation and adhesively securing such end portions including gusset elements thereof to the bottom panels and to one another.

2. The method of making a paper bag having a bottom in the form of a regular hexagon which comprises providing a tubular paper bag blank subdivided by longitudinally extending creases to form front and back panels and four side panels all of substantially equal width, with gussets formed of the side panel material lying between the front and back panels, slitting the creases at the vertices of the gussets inward for short distances from the bottom of the blank folding back the front panel to form bottompanels of the' side panel material with portions of the bottom panels protruding beyond the lateral bounds of the front and back panels, and folding in end portions of the blank into overlapping relation and adhesively securing such end portions to the bottom panels and to one another.

3. The method of making a. paper bag having a bottom in the form of a regular hexagon which comprises providing a tubular paper bag blank subdivided by longitudinally extending creases to form front and back panels and four side panels all of substantially equal width, with gussets formed of the side panel material lying between the front and back panels the gussets being of substantially one quarter panel width, slitting the creases at the vertices of the gussets inward for short distances from the bottom of the blank, folding back the front panel to form bottom panels of the side panel material with portions of the bottom panels protruding beyond the latteral bounds of the front and back panels, and folding in end portions of the blank into overlapping relation and adhesively securing such end portions to the bottom panels and to one another.

4. The method of making a paper bag having a bottom in the form of a regular hexagon which comprises providing a tubular paper bag blank,

subdividing the same by forming longitudinally extending creases, into a front panel, a back panel, and four side panels, all of substantially equal width, forming gussets between the front and back panels from the side panel material,

forming bottom panels of the side panel materialby drawing the front half of the bag at one end away from the rear half throughout its entire width and folding it back with portions of the bottom panels protruding beyond the lateral bounds of the front and back panels, and oppositely folding in end portions of the blank and adhesively securing such end portions including gusset elements thereof to the bottom panels.

5. The method of making a paper bag having a bottom in the form of a regular hexagon which comprises providing a tubular paper bag blank, subdividing the same by forming longitudinally extending creases, into a front panel, a back panel, and four side panels, all of substantially equal width, forming gussets between the front and back panels from the side panel material of such width that the blank when flattened is of double panel width, slitting the creases at the vertices of the gussets inward for short distances from the bottom of the blank, folding back the front panel to form bottom panels of the side panel material folding in end portions of the blank along lines substantially equidistant from the center line of the bottom panels and separated from one another by a distance substantially equal to the apothem of the bottom of the finished and unfolded bag, and adhesively securing such end portions to the bottom panels and to one another, to seal the bottom of the bag and to fix the diagonal dimension in one direction and the apothem dimension in another direction at right angles to the first at values appropriate for the regular hexagonal base.

6. A paper bag comprising a body portion having a front panel, a back panel, and four side panels, all of substantially the same width, and

having gussets formed in the side panels, and. a 4

hexagonal bottom folded into overlapping relation to the body portion of the bag with its long of a panel and its width substantially equal to'150 the apo'them of a regular hexagon having sides equal in length to the width of a panel.

7. A paper bag comprising a body portion having a front panel, a back panel and four side panels all of substantially the same width, and having gussets of quarter panel width formed in the side panels, and a hexagonal bottom folded into overlapping relation to the body portion of the bag with its long diagonal substantially in coincidence with the lower extremity of the body portion,- the bottom being of fixed dimensions and having its long diagonal fixed by pasting of front and back panel material and gusset material to side panel material to be substantially twice as long as the width of a panel and its width fixed by pasting front and back panel material to one another to be substantially equal to'the apcthem of a regular hexagon having sides equal in length to the width of a panel.

8. A paper bag having a front panel, a back panel and-four side panels all of substantially the same width, gussets of quarter panel width formed in the side panels, and a bottom of regular hexagonal form composed of front, back and side panel material folded over and pasted talk the length of a diagonal of the bottom and a dimension at right angles thereto while leaving the side panel material including the gusset material free to be folded out to make the bottom of the opened bag of regular hexagonal form, the

front and rear terminal portions of the bottom being folded inward against the central portion of the bottom and into substantially meeting relation, and the folded bottom lying against'one side of thebag body in partially overlapping relation thereto.

9. A paper bag having a front panel, a back panel and four side panels all of substantially the same width. gussets formed in the side panels of such depths that the side panels protrude for about half panel width beyond the lateral bounds of the front and back panels, and a bottom composed of bottom panels formed of side panel material which connects separated end portions of the front and back panels, and of said separated end portions of the bag material folded in from opposite directions upon the bottom panels and secured to them.

- THEODORE S. FALK.