US2952396A

US2952396A - Shopping bag

Info

Publication number: US2952396A
Application number: US676675A
Authority: US
Inventors: Harford K Steen
Original assignee: INTERSTATE BAG CO Inc
Current assignee: INTERSTATE BAG CO Inc
Priority date: 1957-08-06
Filing date: 1957-08-06
Publication date: 1960-09-13
Anticipated expiration: 1977-09-13

Description

Sept. 13, 1960 2 Sheets-'Sheet 1 Filed Aug. 6, 1957 wzrrm m W w .41. l a e .K Q .s *n F mv, S wmqm uam VM R m7 IIJ om Nv. anax t a a i n.. .|l aaa v z @am H H. K. STEEN Sept. 13, 1960 SHOPPING BAG Filed Aug. e, 1957 2 Sheets-Sheet 2 INVENTOR.

N Hman K. ST55/v HTTOIPNEYS United States Patent O SHOPPING B4G Harford K. Steen, Newburgh, NY., asslgn'or, by mesne ents, to Interstate Bag Company, Inc., a corporation of Virginia aired Aug. s, 1951, ser. No. 616,615

2 claims. (c1. 229-54) This invention relates to paper shopping or carrying bags embodying the features of the bag disclosed 1n U.S. Patent No. 2,346,710. It is the primary object of the invention to provide a bag of the lkind referred to with a iiner composed of paper which is waxed or other-` wise treated on one face for imparting desirable moisture and/ or vapor barrier properties.

The bag of Patent No. 2,346,710 is a familiar artlcle of commerce, having been produced in -large quantity on high speed, continuously rotary bag making machinery.

The bag itself includes a main body provided with an adhesively secured reinforcing strip which extends substantially all the way round the bag inside the mouth thereof. The bag further includes a pair of opposed twine handles which are secured inside Ithe mouth of the bag and which protrude outward from between .the bag body and the reinforcing strip, being ahesively secured -both to the reinforced body and the reinforcing strip.

While the modification of the bag to provide a con- .tinuous moisture and/ or vapor barrier is highly desirable, -the provision of such a barrier is a matter of some diculty. It is not -feasible vto employ as bag body mate-` -lining is therefore required if Ithe desired barrier is to be,

Other objects and advantages will hereinafter appear.

In the drawing forming part of this specification- Figure 1 is a perspective view of an illustrative bag embodying the present invention:

Figure 2 is a diagrammatic view in side elevation showing the preparation and assembly of .the body and lining webs, the reinforcing strips and the handles, prior to final severance and bottoming.

Figure 3 is a perspective diagrammatic view showing the steps successively performed by the mechanism of Figure 2;

Figure 4 -is a lfragmentary sectional view taken on the line 4-4 of IFigure 3, looking 'in the direction of the arrows;

Figure 5 is a sectional view of the novel bag according to the invention, Ithe section being taken on Ithe line 5-5 of Figure l, looking in .the direction of the arrows;

Figure 6 is a fragmentary plan view on a larger scale than Figure 3, showing details of a handle, the paste pattern, a reinforcing strip and the webs.

The diagrammatic showing of Figure 2 is generally like that of Figure 1 of Patent 1,799,072, save that modiications have been included for taking care of the bag lining.

The bag body paper is fed from a reel 10 in the form of a continuous flat web l12 which may be strong kraft paper or any other suitable bag making paper. The web 12 is -fed between a printing roller 14 and a bed roller 16, and thence between a cylinder 18 and a roller 20. The cylinder 18 includes means of well understood construction, not shown in detail, for forming transverse slits 22 and longitudinal slits 24 at bag length intervals l /along .the web 12. The cylinder 18 also includes means provided without impairing the normal functional char- Y acteristics of .the unmodified bag.

The application of ra liner to the bag presents a problem. In the manufacture of the unlined bag a diiiculty was -found to exist in connection with the severance of each blank llength because of the previous attachment of the handles. Since the previously attached handles extended across the line of severance the problem was to sever the blank lengths from the web without severing the handles. In order that the severance of the handles may be avoided, the body 'web is pre-slit across the handle zones -to form partial lines of severance before lthe handles are applied, and .the severance is completed after .the handles are applied without cutting into the handle zones. The coated liner web presents a like problem.

It is a feature of the invention lthat .the liner web, before it is brought into meeting relation with the body web, is preliminarily slit across the handle zones and is adjusted, if necessary, into phase with the body web so .that the slits of the liner web will be fed substantially into register with the slits of .the body web after the reinforcement and the handles have been applied to the body web. With this arrangement the subsequent completion of the lining web severance may be effected concurrently with, and as an incident of, the subsequent completion of the body web severence. In other words, the travelling liner web is pre-slit and is then registered with the pre-slit ybody web, the bag manufacturing procedute being otherwise substantially in accordance with .the standard procedure for an unlined bag of the kind referred to.

for applying reinforcing and lining attaching adhesive areas 26 and a lining attaching adhesive strip 28.

The roller 20 is also opposed by a roller 30. A reel 32 supplies a reinforcing web 34 to be severed into short lengths or patches 36 on the roller 30, the Ilengths being applied by the roller 30 at bag blank intervals to the web 12.

Twine 38 is fed from reels 40 (one shown) to handle formers 42. The handle formers are timed in their operations to thrust the handles 44 simultaneously forward between the

rollers

20 and 30 in such relation to the cutting oi and the advancement of the reinforcing strip 36 that Ithe strip is caused to overlie .the attaching ends of the handles as s een in Figures 3 and 6.

Each gummed area 26 may be considered as composed of three zones: (a) .the zone 26a which is covered by the reinforcing strip 3'6, (b) the zone 26b bounded on one side by theedge of strip 36 and on the other by the line of severance of which .the slits 22 are to form parts, and (c) the zone 26a which lies to the right of the line slit in -Figure 6. 'Ihe adhesive of each zone 26a, serves to attach a strip 36 to one :blank length of the body web 12 and also contributes to .the attachment of the handles to vthe same blank length of the/body web. The adhesive of each zone 26b extends around the inner face of the mouth portion of the blank length for attaching the upper margin of a liner lblank iength .to ythe body web 12. Un'gummed areas 46 are provided in the Zones 26e inline 1 with each of the four handle legs to avoid smearing of as a supplementary connecting means between the handles and the body web 12.

With the

slits

22 and 24 formed, the paste applied to the

areas

26 and 28, and the patches 36 and the handles 44 applied, the web 12 is ready to have a coated lining web 48 adhered to it. The web 48, which is of substantially the same width as the web 12, is supplied from a reel 50. The web 48 has slits 52 and 54 (corresponding to the

slits

22 and 24 of the web 12) formed in it by a cutter 56 which is composed of a knife carrying roller 58 and a bed roller 60. The slits 52 and 54 are designen to register exactly with the

slits

22 and 24, respectively, when the webs l2 and 48 are brought together and combined with one another. Lateral registration presents no difficulty but it is important that the web- 48 be adjusted into phase with the web 12, if adjustment should prove to be necessary.

After leaving the cutter 56, therefore, the web 48 is caused to pass a phase adjusting device 62 which comprises xed guided

rollers

64 and 66 and an adjustable intervening roller 68. If no adjustment is required the roller 68 is set in an inactive position such as the dotted line position designated 68a, to permit the web 48 to travel in a straight linebetween the

rollers

64 and 60. The roller 68, may, however, be adjusted to increase to any desired extent the length of the web patch between the

rollers

64 and 60, for example, to a position like that in which it is shown in full lines in Figure 2. The roller 68 can be readjusted with the machine in operation, thereby to bring about exact phase correspondence under visual control.

The web 48 is fed onto the web 12 at a combining roller 70. Although the

webs

12 and 48, as noted, are of substantially the same width, they are not brought together in lateral registration. On the contrary, one margin 48a of the web 48 is caused partially to overlap the adhesive strip 28 so that a substantial margin 12a of the web 12 is left exposed, while the opposite margin 48b of the web 48 is caused to extend beyond the corresponding margin 12b of the web 12. The superposition of the webs causes the web 48 to be united with the web 12 in the areas of the stripe 28 and the zones 26b and 26C. The reinforcing strips 36 are made short enough and are appropriately placed to leave the stripe 28 continuously clear for contact with the web 48. Each strip 36 is located about a half inch below the line of blank severance in order to leave the paste zone 26a free for contact with the web 48.

After the roller 70 is passed,

webs

12 and 48 are advanced in unison around a guide roller 72 and thence to a gummer 74. The gummer, as shown, comprises an adhesive applying roller 76 and a bed roller 78. The gummer 74 applies a stripe 80 of adhesive to the exposed margin 12a of the lining face of the web 12.

After passing the gummer 74 the composite web is fed through tubing mechanism of well known construction. The result of the tubing is illustrated in Figure 5. The margin 12b of the web 12 is caused to bear against the adhesive stripe 80 which has been applied to the margin 12a of the web 12. At the same time the margin 48b of the web 48 is caused to overlap the margin 48a of the web 48 and to bear in part against that portion of the adhesive stripe 28 which has been left exposed by the margin 48a.

The finished bag 82 (Figure 1) is bottomed in conventional manner, `successive blank lengths being separated along partial lines of severance which coincide with,

and complement the

slits

22 and 52. As will now be apparent, the novel bag comprises a body composed of the web 12 which is reinforced for a considerable width substantially all the way around the mouth of the bag by a reinforcing strip 36, is provided with a pair of registering handles 44 which protrude outward from within the mouth of the bag, and includes a complete liner composed of the web 48 which is desirably coated on the inner face with a suitable water and/or vapor repellant material such as wax. y

While certain preferred embodiments of the invention have been illustrated and described in detail, it is to be understood that changes may be made therein and the invention embodied in other structures. It is not, therefore, the intention to limit the patent to the specific construction illustrated, but to cover the invention broadly in whatever form its principles may be uti1ized.-

body member and which forms an uninterrupted inner bag wall,-the liner being made unitary with the bag body member by being directly and continuously, adhesively united to the bag body along all four of the liner margins, and the reinforcing strip being spaced inward a short distance from the mouth of the body to expose an upper marginal portion of the body, the adhesive union of the upper margin of the liner with the body being effected along the upper marginal portion of the body which is exposed above the reinforcing strip, the material of the liner being interfolded and united with the material of the body member in the bottom area.

2. A carrying bag comprising, in combination, a paper body having a mouth, substantially registering handles secured in the body mouth and protruding outward beyond the mouth, a reinforcing strip disposed to extend substantially all the way around the bag within the mouth thereof but located to leave clear a margin of the body of substantial width, said strip serving also to assist in securing the handles to the inner faces of the body' walls, and a complete, water impervious, tubed liner consisting of a sheet having a water resistant coating on its inner face, which sheet is substantially coextensive with the body, is adhered to the inner face of the body completely around the mouth of the body and along a zone which extends the full length of the body, and is interfolded and united with the material of the body in the bottom area. Y

References Cited in the le of this patent UNITED STATES PATENTS l,835,477 Eaton Dec. 8, 1931 1,910,449 vRose May 23, 1933 2,060,451 Steen Nov. 10, 1936 2,221,617 Steen Nov. 12, 1940 2,346,710 Steen Apr. 18, 1944 2,469,536 Winesett 1-- May 10, 1949