Патент USA US2116571код для вставки
May IÜ, ' . 1_ GURWICK Ü 2,116,571 BAG MANUFACTURE ` Filed M_ay l5, 19156H \ _ i \ Viz@ Patented May l0, 1938 2,116,571 ,' iso STATES PATE FFICE 2,116,571 BAG ` »i f normen Irving Gurwiclr, Mount Vernon, Unio, assigner to Shellmar Products Company, Mount ‘ii/’er non, Ohio, a corporation oi Delaware l Application May l5, 1936, Serial No. ‘79,858 3 Claims. (Cl. 93-35) The present invention relates to containers of a web I 0 is taken from a roll of transparent cellu the bag type and has particular reference to an lose sheeting I I and thereafter passed through an improvement in bags and other containers con ' intaglio printing unit. This unit includes an structed of transparent cellulose sheeting and upper impression roll I2 and a lower edge printing cylinder I3 constructed in the usual 'mannen 5 'en folded into container form with creases or angu The lower part of the printing cylinder I3 ro lar edge portions. tates in a body I4 of the material which it is de A principal object of the invention is the pro vision of reinforcing means for the creases or edge sired to_deposit upon the web as a reinforcing material. The body of material It is carried in portions of transparent cellulose sheeting. . An additional object is to provide a bag or a bath I5 and the excess material picked up by 10 similar container which has deposited along the the roll I3 is scraped therefrom by means of a angular edges thereof a reinforcing material doctor blade I6. Cylinder it is an intaglio copper surfaced cylinder having circular etched portions composed of a ñexible non-fibrous cellulose prod ll and I8 for applying a substantially continuous uct or the like._ A further object is to provide a method of line of the material in the bath I5, it being under- 15 forming containers having creases or angular stood that the doctor blade I6 scrapes the mate ' edge portions which will not break or shatter as rial from the cylinder i3 except along the etched portions I -I and I8. readily as has been the case heretofore. » As a result of passing between the cylinders I2 These and other objects will be evident upon a consideration of the following description of a and I3 the web has deposited thereon longitudi- 20 preferred embodiment of the invention and by nally extending stripes I9 and 29 of the material reference to the accompanying drawing, inwhich contained in bath I5.l The material in bath I5 is of the nature of a Fig. 1 is a perspective view, somewhat diagram lacquer ink and includes a. heavy bodied nitrocel matic; of a device for applying an integral rein forcing material to a web of transparent cellulose lulose such as “600 second” nitrocellulose. The 25 nitrocellulose is carried in a suitable quick-drying sheeting; ‘ Fig. 2 is a plan view of a satchel bottom bag organic solvent which permits the lines of nitro formed from the web shown in Fig. l, the bag cellulose to be applied and dried quickly before the web is formed into tube lengths. It is char being shown in collapsed condition; and acterlstic of nitrocellulose of this type that when 30 Fig. 3 is a cross-sectional View taken along line 30 so deposited it firmly adheres to the regenerated 3-»3 of Fig. 2. In the production of bags and similar types of cellulose or cellulose acetate sheeting of which containers from transparent cellulose sheeting, the web I0 is composed and forms a. relatively thick body portion of a tough nature which resists such as regenerated cellulose and cellulose ace tate, it is customary to fold a web of transparent shattering of the container along the vulnerable 35 cellulose sheeting into tubular form, to sever bag t portions covered by the stripes. After depositing the heavy bodied nitrocellulose >lengths from the tube, and to fold one end of the tube lengths into closed condition to complete the stripes, the web is formed into a tube with the bag. In such condition the bag is collapsed and stripes I9 and 20 overlapping the edge portions 40 the side edges consist of a layer of the transparent in the manner shown in Fig. 3. That is, the 40 cellulose sheeting folded over upon itself and- stripes I9 and 20 form a reinforcement for these creased edges that are most likely to be damaged somewhat creased. 'I‘he bottom of the bag like in the use of the bag. ` wise consists of several folded-over portions hav The _bag is provided with a Satchel bottom as ing creases or angular portions. When containers formed of these materials are used, it has been shown in Fig. 2, the portions of the bottom hav- 45 found that breakage of the containers is most apt ing the stripes I9 and 20 therealong being folded to occur along these angular or sharp edges or so that the stripes I9 and 2D meet as substan creases. In accordance with the present invention, the web of transparent cellulose material from which the containers are formed is provided 4with one or more longitudinal strips consisting of a deposit of a ñexible material of a suñciently tough na ture to reinforce the containers and to reduce the tendency toward breakage. As shown in Fig. 1, - tially shown in the drawing. In this way the 'corners 2| and 22, which are the weakest part of the bottom, are afforded a flexible protection 50 by the stripes I9 and 20, thereby materially in creasing the strength of the bag. ' As indicated in Fig. 3, the stripes I9 and 20 are printed on the outside surface of the web, but it will be understood that the stripes likewise may 55 p 2 be printed on the inside of the web. e inven tion is applicable to other forms oi’ containers than the speciñc bag shown in the drawing. In general, it will be possible to apply the invern`-v tion to any particular form of container or wrap ping material by the printing method of the in vention. Also, due to the method of application of the stripes i@ and 2@ it is possible to apply stripes other than longitudinal stripes to further 10 protect the material. Thus, a transverse stripe may be applied and a. fold laid along such stripes. In some cases it will be found desirable to print Vwider stripes than shown in the drawing. This facilitates the vertical operation; since it is easier 15 to locate the fold along a wider stripe than along a narrow stripe. The material deposited is a heavy bodied nitrocellulose which produces a sub stantially thicker ñlm per unit of material than in the case of lacquer inks employed in intaglio 20 printing of designs. 30 If'desired, the material may be colored to present the appearance of colored stripes on the finished bag or container. Due to the ñexibility of the printed stripes and the rbody of the material the fold lines of the trans parent cellulose sheeting are substantially pro tected thereby. The nitrocellulose stripes are diüerent in their characteristics from the regen erated cellulose and cellulose acetate with which it is desired to employ the material and the com loination of the two types oi' the materials in the manner described materially reduces the shatter ing tendencies of the containers with which the heavy nitrocellulose is employed. 'I'he improved container is produced at a cost, which is only 35 slightly in excess of the normal cost of the con tainer and the printed stripes not only are pro tective but are attractive as well, particularly when colored. . Ordinarily, the transparent cellulose web from which the containers are constructed will be sub-» Jected to a printing operation and wound into the roll form indicated at ii prior to the operation described hereinabove. That is, the web is sub‘î jected to an ordinary printing operation, wound into roll form, unwound, longitudinal lines of the heavy bodied nitrocellulose are applied to the un wound web, and the web then is folded into con tainer form along the lines of the heavy bodied nitrocellulose. Thus, the protective lines of the heavy bodied nitrocellulose are applied just prior to folding the web into bag form. It will be recognized that the invention as de? scribed herein is susceptible to . modification Without departing from the scope of the ap pended claims. 15 I claim: 1. The method of producing containers of transparent cellulose sheeting, which comprises applying longitudinal lines of a quick-drying solu 20 tion of a heavy bodied nitrocellulose to a travel ing web of transparent cellulose sheeting, and folding said web into container form along said lines. 2. The process of making containers, which 25 comprises applying a line of S00 second nitro cellulose contained in- a solvent to a web of trans parent cellulose sheeting, and folding said web into container form along said line. 3. The process of producing containers of trans parent non-ñbrous sheeting, which comprises ap plying to said sheeting a line of an adherent soin-_ tion of .a relatively heavy bodied cellulose com pound contained in a relatively quick-drying solvent, drying said solvent, and folding said sheet 35 ing along the line of application‘of said cellulose compound. / . mVING- GURWICK.