US2638820A - Cylindrical container and method of making same - Google Patents

Description

May 19, 1953 'r. F. BARNES CYLINDRICAL CONTAINER AND METHOD OF MAKING SAME Filed July 1, 1947 2 Sheets-Sheet l n:Ill!!!llillllullllllrllil IIIIQIIII d5 INVENTOR. Z/zavzaslfiarrzea BY I mnltmj w T. F. BARNES May 19, 1953 CYLINDRICAL CONTAINER AND METHOD OF MAKING SAME Filed July 1, 1947 2 Sheets-Sheet 2 Patented May 19, 1953 CYIBINDRIGAH CONTAINER AND METHOD OF GLDSAMEH ThomasFQBarnes, Chicago,. Ill.

Application Jilly I, 1947,-Sri3l-N01 758,408

2 Claims.

Thisinvention relat'esmto improvements in tubular containers which'larei formedifrom. aapluralityof plies of fibrous' material.

'l his application is a i continuationimpart of copending applicatiom Serial? No; 639 ;258 filed 'J'anuaryfi, "1946, now abandoneoli 'It is" an objectof the invention tovprovide a tubular or convolute container whichl is formed of 'a' plurality of plies'of relatively flexible paperhoar'd! or similar material wherein the container is provided with a lineof perforations adjacent one endtherebi toperni'itthe separation ofi that end of the containerby" tearing-the material at the line of perforations and' thereby'formingia removable and replaceable cover-1' member: having a flange adapted to beengaged in telescoping relation with the-"remaini'ng portion ofthe' con t'ainer.

"Another object of the invention is-to: provide atubulan paperboard container 1 of the: type described" having an outer label secui'ed to the outer surface oithe container; which labelextends over' the line of perforations; and a 'tear string secured beneath the label at the line' 'oi perforations; which tean string may bexgrasped at theexposed end thereof and pulled to sever the "label whereupon the containertop may be removed by twisting the same vtith: sufiicl'ent force to separatethe material as described.

Another object of the invention is to: provide a' container formedof a plurality of plies: of paper or similar material which-is soconstruoted that-one endof the container constitutingthe cover' therefor may be removed by ine'relyhfiuni- Winding a tear strihg-= which severs: the outer: ply oi" the container and frees' the-cover for immediate remova-l.

Another object of the inventionis to: provide a container having a body' portion and end closure members-wherein the body portionis formed from a blame of-"relatively flexible paper b'oardmrsimilar material, the blank heingi init-iallypre- -cut alonga staggered. line intermediate the side edges thereof and-being: rolled upon itself toproducea container body having aiplii rality of plies or'convolutionsof the material, and vvherein the container body is readily separable 51011911119 pre-cut line into separate conta'ine-r sections; one oi'which sections constitutes brous material: upon itself tot-form: atubularcontainer. bodn havdng; a multiplicity of: plies: ohmaterialwh'erein thezbl'ank is initiallyapre-cut along awstaggered line adjacent: one edge thereof-eso that when it is formed into a tubular: body and provided with" end closuremembersua: portion of" one: endzthereof may bevsepara-ted from sthe remainder of the container to thereby: provide a l-flangf ed.-.cover member, the container being also;provided vwith v a: separate outen" ply; of materiallwhich initially secures thes'separable por tions wof 1' thevcontainer: and" a: tear string} associated with the outer ply of materialito"pr'ovidedor readily severing: the outer ply BJOHQ'rthETliIIEOf separation of the container cover 1 member and the remainder oi the: container."

A further?" object of: the" invention vis to; provide at method: of forming-1 a tubulari'container hav ing a.bodyportionz:characterized by: a plurality of-i pliesi or. convolutions of 1 materiali which compriisesfproviding an. adhesively :coated; generally rectangularkblank ofipapenboardi orxsimilarv ma..- terial" oiii aile'ngth commensurate with the: mim ber: ofiplies or thickness oflicontainer: desired; "the blanlnbeinglpre-cutzorr periorated on: atstag-gered. line: spacediintermeciiate thersitle edges of the same; Winding-I on rolling? ther blank: uponlx itself toil form a multi-ply" tubular body lrportl'onpproviding top and bottom closuramembersc on metal or other? suitable material and crimping; lthe same 1 to? the emis oi the? tubular body portion-ate complet e= th e container.

A still further: object of the inventiom is: to provide a methodot f-orming a container-Inf: the character described including securing to the tiibul-aribodyrof the container an:- outer lab'el and a tear string for the same-which tear string: is "securecl' beneath thelaher and: along the pre' cut or perforated line separating the top and -bot tom portions of the" container;

These and: other object's-"of the invention will be apparent from adesoription' anthe -containers and the methods otmali-in'g the same" which are shown, byway ofillustration; in the accompany ingclrawings wherein:

Fig. 1" is a perspective view of acompleted four ply cylindrical container" embodying the princi ples of the invention;

Fig; 2 is" aperspective view of" the container with" the tea'r string removed and the flanged top separated from the'remaihd'erof the-"can'- tainer;

"Fig-.= 3" is a vertical section through the con ta'iner' with the top separated ftherefiiommand with parts broken away;

Fig. 4- isi a: plank View of v adhesive coated pre-cut blank prepared for forming the tubular portion of the container;

Figs. 5 and 6 are perspective views illustrating the method of forming the body of the container;

Fig. '7 is a perspective View of the completely formed container body with an outer label and tear string applied;

Fig. 8 is a plan view to a reduced scale of an adhesive coated pre-cut blank prepared for forming a three-ply cylindrical container embodying a modified form of the invention; and

Fig. 9 is a vertical section through the completed container formed from the blank shown in Fig. 8.

Referring to Figs. 1 to 7 of the drawings, the container 54 is formed from a generally rectangular paperboard blank H which is of sumcient length to provide, when rolled into tubular shape, a body having four plies or thickness of material. The blank H is divided, for convenience in illustration, into four sections or portions l2, |3, I4 and I5, each one of which con stitutes approximately a single ply for the tubular container body.

The sections l2 and I3 of the blank H, which form the inner plies of the container body, are perforated along the line H5. The perforated line I6 is spaced a substantial distance from the side edge ll of the blank and extends from the inner end edge l8 thereof to approximately the center of the blank which is indicated by the broken line l9.

The sections I4 and I5 of the blank Ii are perforated along the line which also extends parallel to the side edge ll of the blank. The perforated line 20 is spaced a distance from the edge I! which is somewhat less than the distance from the edge I! to the perforated line E6. The inner ends of lines It and 2c are connected by a transverse line of perforations 2| at approximately the center line H! of the blank. The perforated line 20 extends from the line 2| to the outer end edge 22 of the blank H. The perforated lines l6, 2|] and 2| constitute a staggered line of perforations extending the full length of the blank from the inner end it to the outer end 22 of the blank Ill and dividing the blank into two readily separable portions.

The blank I is completely coated with an adhesive material 23 except for the area indicated at 24 on the section it of the blank which area extends the length of the section l3 and a width corresponding to the difference in distance from the edge I! of the perforated lines l6 and 20. The side edge constitutes the top edge of the container body when it is formed, while the opposite side edge 25 constitutes the bottom edge of the same.

To form the container section H of the blank II is first formed into a cylinder, with the adhesive coated side outermost, to provide the inner ply of the container body. The remaining blank sections |3, l4 and I5 are rolled or wound on section l2, as illustrated in Figs. 5 to '7, to provide a four-ply tubular or cylindrical container body, with section I5 forming the outermost ply thereof.

An outer label 28 is then applied to the outer surface of the cylindrical body formed from the blank II. The label preferably extends the full length of the cylindrical body with a portion extending on both sides of the perforated line 20. A tear string 2] of sufiicient length toleave one end extending beyond the outer or trailing edge 28 of the label 26 is wound around or arranged circumferentially of the; cylindrical body between the label and the outer surface of the body and at the perforated line 20.

After the label 26 and tear string 21 have been applied the tubular body is closed at opposite ends by applying thereto a top closure member 29 and a bottom closure member 36. The closure members 29 and 39 are provided with flanged or re-bent edges 3| and 32, respectively, which are crimped to embrace the top and bottom edges [1 and 25 of the cylindrical body. The container may be filled prior to the application of either the top 29 or the bottom 3|). One of the closure members 29 and 3|) may be provided with an independent opening by means of which the container may be filled with the product which is being packaged.

The completed container may be separated into two sections to obtain access to the contents by first pulling on the tear string 21 and severing the label 26 along the perforated line 20 after which the top and bottom of the container may be grasped in the hands and twisted in opposite directions to break the remaining uncut fibers of the wall material along the perforated lines [6, 2i] and 2| and thereby permit the top and bottom sections of the container to be separated from each other by movement in an axial direction. This provides a top section which constitutes a flanged re-closeable cover for the bottom section of the container, as illustrated in Fig. 2. The perforations or weakened indentations in the lines Hi, 20 and 2| may be such that very little force is required to sever the uncut fibers and separate the two sections of the container. The space 24 being free of adhesive permits the separation of the two sections of the container on the stepped or staggered line provided by the lines of perforation I6, 20 and 2| so that the cover member is provided with a projecting rim or flange which is telescoped within the bottom of the container when the sections are reassembled to close the container.

The label 26 may be printed or otherwise supplied on its outer surface with decorative or descriptive material to identify the contents of the container and to lend a pleasing and attractive appearance to the same. Label 26 also further insures the retention on the container of the fianged cover until after the label is severed by removal of tear string 2'1.

In Figs. 8 and 9 another form of the container is illustrated. In this form the blank 40 is of sufficient length to provide three thicknesses or plies of material in the walls of the tubular body portion of the container. The blank 44 is illustrated as divided into three sections which are indicated at 4|, 42 and 43, each section being approximately the length required to form a single ply of material circumferentially of the container. The section 4| is adapted to form the inner ply of the container, while the sections 42 and 43 are adapted to form the outer plies thereof. Section 4| of the blank 40 is precut on the line 44 which extends from the inner edge 45 of the blank to the line 46 which indicates the end of the section 4|. The line 44 is parallel to and spaced from the top or side edge 41 of the blank 40. The sections 42 and 43 are pre-cut on the line 48 which extends from the line 46 to the outer end edge 49 of the blank 40. The line 48 is parallel to the top edge 41 of the blank and is spaced a somewhat lesser distance from the edge 41 than the line 44. The blank 40 is also pre-cut on a transverse line 50 which is approximately along the line 46 dividing the lankls' btibrlsWl' and 42 andfwhich joins the es4 and 48: Thesid edge of the blank formsithe' top edge'ofthe'completed container coated on one side with an adhesive material 52 which substantially completely covers the blank except for the area indicated at 53 on section 4% which is free of the adhesive. The non-coated area 53 extends inwardly along the line 44 substantially the full length of the section 4| and is of a width corresponding approximately to the diiference in distance of the lines 44 and 48 from the edge 41.

To form the cylindrical container body, the section 4| of the blank 40 is coiled or formed into cylindrical shape so that the inner edge 45 does not extend beyond the line 48. Section A then forms the inner ply of the container body. Section 42 is rolled around the same to form the second ply, after which section 43 is rolled therearound to form the outer ply of the container body. The sections are coiled or rolled so that the area 53 which is free of adhesive will extend entirely around the full circumference of the container and permit the top to be freely removed without any interference or sticking due to overlapping of the sections, that is, the sections d! and 42 are rolled so that the pre-cut line 58 will fall within the non-adhesive area 53 at the outer or trailing end of the section 42. When the blank has been rolled into cylindrical or convolute form to produce the body of the container, the label 54 and a tear string associated therewith, as in the four-ply form of the container, are secured on the outer surface of the cylindrical container body with the tear string along the line 48. The top and bottom closure members 55 and B are crimped to the top and bottom edges 4'! and 5|, respectively, to complete the container.

In this form of container the cylindrical body portion consists of three plies of material, whereas in the form illustrated in Figs. 1 to 'I it consists of four plies of material. The con tainer may be formed with a larger number of plies of material if desired, depending upon the strength and rigidity required. In the form illustrated in Figs. 8 and 9, the top is readily removed from the bottom of the container by merely removing the tear string and axially separating the top from the bottom. The pre-cutting of the blank along the lines 44, 48 and 5!] permits separation of the top and bottom container sections without any twisting or tearing of the material and the staggered or stepped relation of lines 44, 4B and 50 provides a top member having a flanged lip or rim which is readily insertable in the bottom of the container in telescoped rela-- tion, thereby providing a rigid cylindrical container of great strength which will not leak, which is not broken in handling, and which is provided with a readily separable and re-usable top.

The containers illustrated in the drawings are both provided with a body portion which is cylindrical in cross section. The invention is equally applicable to the production of containers having other than a cylindrical cross section.

The tubular body portion may be shaped to probbdywhile the opposimside"edge 5| forms the bottom edge thereof; Thepre' cut lines 44, 48 and 50 form a'steppedor staggered lineextendjiiig fr'brhtiie inner end45t o the ou'terend"49 of I th'e' blank "40 and dividetthe f blank into two separ'aitesections or' portions. The blank 44? is videany cross section desired, such as square,

rectangular; hexagonaljetc.

While specific details of construction and materials havebeen described in illustrating the invention, it will be understood that other details of construction and other materials may be resorted to within thespirit ofth'e invention.

I claim:

1. In the art of making tubular containers comprising a tubular body having a tubular-portionthereof in telescopic engagement with a tubular portion of a cover, the method of simultaneously making the tubular portion of. the body and the tubular portion of the cover in assembled telescopic engagement which comprises: applying adhesive to the major portion of one surface of an elongated rectangular web of paperlike material, leaving a generally rectangular area free from adhesive, said adhesive-free area extending longitudinally of the web and being spaced from a lateral edge of the web, said adhesive-free area also being spaced from one end of the web a distance at least as great as the periphery of the container to be made, and having a length at least as great as the periphery of the container to be made and a width at least as great as the distance that the body and cover parts are to telescope one within the other; cutting the web to separate it into two sections having complementary edges without substantially moving the separate sections relative to one another, the lines of the cut comprising two offset lines parallel to the lateral edge of the Web, which are spaced from each other a distance substantially equal to the Width. of the adhesive-free area, and which extend from the opposite ends of the web to a locus near one end of the adhesive-free area, and a line connecting the inner ends of the parallel lines; simultaneously winding both web sections into cylindrical form with the adhesive-coated surface outermost and without substantial lateral displacement of the two sections; and applying a paper label around the cylinder to cover the exposed cutting line.

2. A method of forming a container from a one-piece rectangular blank of paperlike material which container when completed is characterized by a multi-ply cylindrical body having in each ply thereof a line of division intermediate the ends of said body and extending around the periphery of the container with the dividing line in at least the innermost ply offset relative to the dividing lines in the remaining plies whereby to divide said body into two parts, with cooperating flange sections on each part of said body in initially telescoped, assembled relation permitting the cylindrical body to be separated when desired into its two parts, said method comprising dividing the blank into two separate portions by cutting on lines which extend inwardly from both end edges in generally parallel offset relation and which are joined intermediate the ends of the blank by a generally transverse cutting line, said first mentioned cutting lines being parallel to and spaced from a side edge of said blank, applying an adhesive to the blank with an adhesive-free area on said blank which adhesive-free area extends from said transverse cutting line towards one end of the blank. a distance approximately equal to the desired circumference of the container and which has a Width approximately the distance between said offset parallel cutting lines, forming said blank into a multi-ply cylindrical body without separation of the blank along said. cutting lines, ap- Number Name Date plying end closures to the cylindrical body and 1,961,559 Hermann June 5, 1934 applying a label over the exposed cutting lines 1,963,994 Hermann June 26, 1934 on the outside of the cylindrical body. 2,188,497 Calva, Jan. 30, 1940 THOMAS F. BARNES. 5 2,215,705 Lenz Sept. 24, 1940 2,260,137 Donnelly Oct. 21, 1941 References Cited in the file of this patent 2,299,4 1 Clanon t, 20, 1942 UNITED STATES PATENTS 2,314,338 Graves et a1. Mar. 2 43 Number Name Date 2,325,145 lvlarlin July 27, 1943 934,266 Bartlett Sept, 14, 1909 2373'554 Fmlay 1945

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