US2029340A - Manufacture of bags - Google Patents

Description

- Feb. 4, 1936. T. M. ROYAL MANUFACTURE OF BAGS Filed July 28, 1952 2 Sheets-Sheet l Feb. 4, 1936. I ROYAL 2,029,340

MANUFACTURE OF BAGS Filed July 28, 1932 2 Sheets-Sheet 2- CO YER PA PER CELLO NANE mvcu'Tozr Thoma-s MfRo qal,

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vith v Patented Feb. 4, 1933 PATENT "OFFlCE. 7

MANUFACTURE OF BAGS Thomas M. Royal,

Philadelphia, Pa.

Application July 28, 1932, Serial No. 625,37?

10 Claims. (01. 93-355 My invention relates to the manufacture of bags and similar containers of paper and similar material and comprises an improved method." of

and means for preparingor associating a plurality of individual webs of paper or similar material subsequently developed into tube formation in bag-making machines; the tube or tubes thus formed being severed into blanks of any predetermined and uniform length, which blanks are passed through bottoming mechanism and are finally delivered as finished bags. A further feature of my invention is the development of a special type of tubular blanks from a'plurality of webs or plies of paper or similar material.

In the manufacture oi paper bags for packaged goods it is common practice to print upon the paper web from which such bags are produced indicia representing the contents of the bag'or package, the name of the dealer or-proprietor, trade-mark data, etc., etc., such printed matter being applied successively to such web in spaced relation, so that when a printed web is subse-' quentlyrun through a bag-making machine and formed into a tube from which bags are subsequently finished, unit blanks may be cutfrom such tube in properly spaced relation with respect to'such printed matter and subsequently formed into bags. l'his is well known practice and millions of bags are made in this manner, including many types of lined bags which, besides serving to keep the contents relatively fresh, prevent the staining of the outer or cover. sheet or web of the bag or package with essential oils present in the goods contained therein.

In the printing of what may betermed the outer or cover portion of the bag or package it is necessary, unless very fast drying ink is employed and the use of the same presents objec=- tions difilcult to overcome, to provide what is known as a slip sheet; usually a sheet of such nature as to prevent a set-off of the printed sur-. face upon the back of the printed web, and this sheet is 'wound with the printed web and overlies the printed surface of the same. Wh'ena roll of the printed web was to be presented to the bag-making machine, it was necessary to remove the slip sheet and in practically all instances, after the ink has dried, the printed sheet is rero1led for the purpose of removing the slip 0 sheet, which is also rerolled; on a separate mandrel for further use. As may be readily understood, this operation increases very materially. the amount of. work necessary to transform the printed sheet or web into bags.

[5 At the present time there is a demand for graminatic in character, in which:

. packages enclosed in "Celphane, usually thatof the waterproof type, with a view of not only preserving the freshness of the packaged contents, but of making the package more attractive. Some attempts have been made to carry a web 5 of Cellophane through the bag-making machine along with the printed web, but many difficultie have been encountered which-preclude the satisfactory manufacture of bags when attempts are made to associate three separate webs; 10 the cover paper; the thin fCelIophane" sheet lying on top of the same, and the bag lining paper disposed on the opposite or inner side of theprinted web, and pass them through a bag-making -machine.

My invention comprises employment of a sheet of Cellophane, which may form the outer and transparent layer or ply of the finished bag and/ or package, and the permanentassociation of the same with the printed web which, heretofore,

has usually been the outer wall or ply of a lined bag. The web or ply of "Cellophane" is presentedtothe printed web asthe latter is wound upon a mandrel or core and overlies the printed surface indirect contact with the printing ink. In some instances the ink may be sufiiciently adhesive to insure such permanent contact of the Cellophane with the printed surface as to preclude the necessity of otherwise securing these two webs together or, if desired, suitable areas so of the printed web beyond; the printed portion thereof may be coated' with adhesive so as to insure proper and permanent engagement of the web of Ce1l0phane" therewith. 'I'hesame effect maybe accomplished by supplying the ink with 36 an adhesive ingredient.

"The several features of my invention are more fully referred to hereinafter; reference being had to the accompinying drawings, more or less dia- 4 0 Figure 1 is a diagrammatic view of means which may be employed for forming a compound -web from which bags may be formed; such web consisting of a printed ply of paper to constitute.

the body of a bag and a sheet or plyof "Cellophane which -'is associated with theprinted ply of paper. and formsa transparent cover for the fims' hedb'ag. w

Fig. 2 is a perspective view illustrating the manner in which the web of paper and the 'web of Celloph'ane" are rolled together. Fig. 3 is an enlarged sectional view of a duplex .web of bag-making material comprising the paper 1 ply and the sheet-or ply of Cellophanef.

Fig. 4 is a view similar to Fig. 3, showing a 5 heet of Web.

Fig. isan enlarged sectional view of the wall .at the open end of a tubular blan'i'made from 5' the duplex web and subsequently formed into a vals corresponding to the length of bag blanks-- formed from the tubular structure into which the I bag. 3

Fig. 6 is'a similar view illustrating a sheet of "5 ns material associated with the duplex-web.

'Fig. 7 is a cross 'sectional-\view of a vdouble,-

accordance with my invention, and

Fig. 8 is a perspective view of a package formed from a bag or container made from a triplex webs.

developed inaccordance with my invention.

i In maldng the cbmbined webcompri'sing the sheet or ply of bag body paper and the sheet or ply of Cellophane constituting the cover or wrap it is desirable to join these webs togetherat interr' duplex web is shaped in the bag-forming machine.

Various ways of securing the plies of the duplex web together may be employed; the adhesive may i 1o walled tub'efrom which bags maybe made in be applied over successive areas corresponding to the blank lengths in spots at regular, or irregular intervals, or" in parallel lines over such areas. or

in other ways. I prefer, however, to connect these plies or webs'together by'broad or relatively in the drawings; I represents a roll of bag paper broadb ds of adhesive disposed at regularly sucto be printed. ,This maybe passed over guide ceeding rolls 2 and 3, and over a platen roll 4, associated with'printin'gmeans of single or multiple type, depending upon the number of colors appliedpand thence to e core 5 upon which such paper'in its printed condition is rewound. Any suitable form or printing meansmay be employed, the printing rolls being indicated at 6. Under usual circumfrom which a bagis made.

condition facilitates use of the bag when stances in-the practice heretofore followed, the

"'25 core =5 receives the printed web or sheet and a second web or sheet; the two webs or sheetsbeing 8'0 .volutions wound therewith.

wound togetherhnd the second sheet separating the printed surface of the printed web from the back of the same throughout the successive con- In carrying out my invention I employa web or sheet of Cellophane indicated at l0 as the "second sheet or web, and such Gellophane web may be delivered from a roll I i. The web 3'5 or sheet of Cellophane" is wound with the printphane is permanentaly associatedwith the ed web or sheet on the core 5 in -a manner substantially indentical with the use of slip sheets. heretofore employed; excepting that the Cello- 40 printed web or sheet. For this purpose the printed' web may be providedwith areas of adhesive applied at regular intervals; suitable means of a type well known in the art being arranged 'to- 'apply such adhesive to the surface of the printed 45. web beyond or adjacent to or as part of the printed portion thereof. As is well known such means inthe printing ink-and applied to predetermined portions of the web as certain parts of the inu may comprise the use of an adhesive supplied '50 dicia are printed thereon; the use'of an ink which is of itself suitably adhesive; or adhesive alone may-be applied to predetermined parts of the web in any suitable and well known manner. The compound web consisting of the paper 5 cover sheet or sheet withthe imprint thereon and the, .Cellophane" web or sheet which serves as the protector for the printed surface, may then, be removed from the printing and winding mechand introduced into proper position with respectto a bag-making machine whereby bags with or without-the addition of the liner'inay be produced.

Fig. '2ishows the manner; in which the Cello phane web or sheet is associated with the printed web. These webs or sheets are of substan- 'tially the same width andwhen rolled together they," are guided or directed so as to overlap J70 viding for the securin of the bag, as indicatediii Fi '7; lines or areas of suitable adhesive being applied to the surface of .the respective plies atone side'or' edge of the 75 same, at a 'andbf.

bag will presents substantially l5 rvals as indicated at :r, in Figs. 2, 8,

employed) will be iri permanent contact and present single edges at the opposite ends of the blank Additionally, such colorless cementitious material capable of,

forming the desired function, or such adhesive may be combined with ink so that the broad connecting bands are in the nature of ornamentation applied to the bags as part of or associated with the printed matter applied thereto as indicating the contents of the bagadvertising matter, etc.

By having complete or substantially complete bands of adhesive applied to the compound web for the purpose of securing the plies of the same together at bag length intervals, the tubes made from such compound webs are more readily cut into the desired blanks inasmuch as the severing engaged, and a cleaner cutris insured.

The securing of the twosheets or webs together, onev of which may be Cellophane, by

the bands of adhesive disposed at bag length intervals is of further value in connection withv the appearance. of the bag inasmuch as the "Cellophane appears in theflnished package as a-ilnal covering or wrapper and not as a mere glazing, or

varnishing of the ply which may be termed the bodyiweb.

While the securing together-of the separatewebs or plies may. be eifected by other means than the broad bands of adhesive, they are par ticularly ,desirable in view of the type of bag emf ployed inasmuch as the wallportions engaged by the adhesive at one end of the be folded *in when the bag isfilled, and. such portion may be fully folded in with the bottom fer-i.

mationi I If and when a liner v formation'oi a bag, this may be arranged to pro ject at one side'of themultiple plies so as t6 be secured at-the seam portion of the finished bags-'- paste-being applied to such or not as may be desired The zones of contact providedby the adhesive "between the ply of -b paper and the transparent outer cover are relatiively wide and the tube is severed into blanks by transverse cutting .means passing through such zones at some point inte mediate 'the termini oftheir area lengthwise of the blank so-that the open end of-the finished a single wall;

ply is employed in the j improved composite web and a liner, in which'A represents the outer'enclosure of Cellophane,-

and B the usual printed cover paper of the package or bag; these two layer'sconstituting the compound web which may be secured together by the broad bands of adhesive such as indicated at 2:. The liner section forming the inner layer l or ply of the wall'is shown at C.'

products to be packaged substantially in the manner indicated do not contain suflicient oily constituents to stain the wrapper, and with such products it may be possible to employ bags without a liner.

While in some instances ordinary Cellophane may be employed with entirely satisfactory results, I prefer to employ .Cellophane-' of the waterproof type, designed to produce a substantially wateror moisture-proof package; such Cellophane enclosure additionally. serving to protect the contents thereof and maintain its freshness, besides giving an ornamental appearance or finish.

. While I have illustrated a particular embodiment of my invention it will be understood that I do not wish to be limited to the exact arrangement disclosed and that modifications thereof may be made without departing from the spirit of my invention and the scope of the appended claims. r

I claim:

1. In the preparati'onof multi-ply webs for the manufacture of multiwall paper bags, producing a printed web in continuous lengths, associating therewith a' web of transparent material in con-' tinuous lengths and in direct contact with saidprinted surface, and causing said transparent web to be maintained in fixed position with respect to said printed web for subsequent formation into multiwall bags by the application of adhesive to said printed web prior to the association therewith of the transparent web; said webs being laterally spaced with respect to each other with tinuous le ths and in direct contact with said paper web projecting beyond the adjacent edge of the transparent web and one edge of the trans-.

' parent web projectingbeyond the adjacent edge of the paper web. a

3. In the manufacture of multiwall pap r bags.

the step of producing multi-ply material from which such bags are made, which consists in passing a web of material in continuous lengths in contact with an impression 6r surface, reeling said web after the printing operation, providing said printed surface with adhesive material, and associating with saidadhesively prepared printed surface a continuous web in contact with an impression or printing surface, reeling said web after the printing operation, providing said printed surface with adhesive material simultaneously with the printing operation, and associating with said adhesively prepared printed surface a continuous web of trans- I parent material for permanent engagement with said printed surface; said transparent web being reeled with the printed web and said webs being laterally spaced'with respect to' each other with one edge of the paper web projecting beyond the adjacent edge of the transparent web and one' edge of the transparent web projecting beyond the adjacent edge of the paper web.

5. In the manufacture of paper bags, means for printing a continuous web of paper, means for applying broad bands of adhesive to said printed. surface, means for directing a continuous web of "Ce1lophane into intimate contact with the,

printed-surface and said bands of adhesive for{ permanent association with said printed web, and

a v passing a web of material in continuous lengths It will be understood, of course, that many,

means for simultaneously :reeling together said laterally spaced with respect to each other with one edge of the paper web projecting beyond the adjacent edge of the Cellophane web and one edge of the Cellophane"-web projecting beyond.

the adjacent edge of the paper web. 6. The method of making multi-ply 'webs for use in the manufacture of multiwall bags, which comprises continuously printing a web of paper,

passing the same to a core or mandrel upon which it is wound, and simultaneously winding therewith a web of transparent material; 'said transparent web being permanently attached to the printed web over the printed matter thereon and said webs being laterally spaced with respect to each other with one edge of the paper web projecting beyond the adjacent edge of the transparent web and one edge of the transparent; web

projecting beyond the adjacent edge of the paper 1 web.

7. The method of making multi-ply webs for use in the manufacture of multiwall bags, which comprises continuously printing a web of paper,

applying areas of adhesive at regularly succeeding intervals in association with the printed matter, passing such prepared web to a core 0'; man- 'drel upon which it is wound, and simultaneously winding therewith a web of transparent "matethe adjacent edge of the transparent web and one edge of the transparent web projecting beyond the adjacent edge of the paper web.

. 8. The method of making .multi-ply webs for use in the manufacture of multiwall bags, which comprises continuously printing a web of paper,

passing the same to a core or mandrel upon which it is wound, simultaneously winding therewith a web of Cellophane, and permanently V ottechlns W, printed over thereom said Cello-'- phanef web forming a t outer sheath for bags produced from said multi-,ply web and said webs being'laterally spaced with fespect'to h each other withtone edge of thepaper web pro- 1 jecting beyond theadiacent edge otthe Cello- I phane web and one edge oi! the Cellophane web projectingbeyond the adjacent edge of the paperwe'bl V 9. The 'method. of making multi-ply. webs !or use in the manui'actm'e of multiwall bags, which cbmprises continuously printing a web otpaper, applying areas 10! adhesiveat regular intervals in-a'ssociation withvthe printed matter, 1 such prepared web to a'coreor mandrel upon which it is wound, simultaneously winding there .with a webor "Cellophane, and permanently attaching said "Cellophane web to the printed web over the printed matter thereon bysuch 9,039,346 a a I web" adhesive; said "Cellophane" web forming a transspaoed with respect to each other with one" edge otthe'paper" web-projecting beyond the adia-t cent edge oi! ,the #Cellophane web and one edge of the.Cellophanef web projecting beyond the adjacent edge oi! the x I -10.- Themethod of multi-p y websfol 1 use in the manufactured mmtiwall bags, which.

comprises continuouslyprinting a web 01 paper,

each other to provide single ply projectims-at opposite edgesof the inulti-ply web parent outer sheath for bags produced from .ngulti-ply web and said webs being laterally moms guana 2o;

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