US1254850A - Method of making paper drinking-cups. - Google Patents

Description

L. S. REYNAL.

METHOD 0F MAKING PAPER DRINKING CUPS.

APPLICMION FILED IAN. l5. i917. Patented Jan. 29,19%.-

2 SHEETS-SHEET l.

APPLICATION FILED JAN. l5. 1917.

SHEETS-SHEET 2.

'sanas agrar-rr aerien.

LOUIS S. REYNA@ 0F NEW BRITAIN, CONNECTICUT, ASSGNOR T0 THE AMERICAN PAPER GOODS CMPANY, 0Fa KENSINGTON, CONNECTICUT, A CORPORATION 0F NEW 5RESIST.

Speecation of Letters Patent.

METHOD 0F MAKING PAPER DRINKING-CUIS.

Patented dan. 29, will@ Application tiled January 15, 1917. Serial No. 142,389.

To all whom t may concern:

Be it known that I, LoUis S. REYNAL, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Methods of Making Paper Drinking-Cups, of whichthe following is a specification.

This invention 'relates to a /method of making paper drinking cups. One of the fundamental purposes of the method is the production of cups in an economical manner, which is an important consideration.- lllfhe initial step in .the preferred form of the method consists in cutting in any desirable manner from a sheet or suitable paper stock, blanks from which the necessary cups are to be formed, the cuts being onsuceessively op posite angles, the result being that there is virtually no stock wasted; as a matterr ofy fact there is practically no stock losty after the first angular cut is made and until'the last angular cut is lnished. Each blank as will be clear, has side edges which converge in one direction and diverge in the opposite along practically similar angles, owing to which circumstance when a blank is cut, the' cut defines the inner side edge of the severed blank and the outer side edge of the blank to be next cut. y

`Wliile a cup'can advantageously be made from this type of blank,it is conceivable that it could be made from some other style of blank. A cup made by the method possesses a desirable amount 'of strength, and is sufficiently reinforced as to prevent its accidental leakage while in use under ordinary conditions. The cup is -of such nature that it can be easily opened. In the drawings accompanying and forming part of the present specification I have shown certain ways of carrying the method 4into etl'ect. These I will set forth in detail in the following description. Obviously I do not restrict myself to this particular construction; I may depart therefrom in several respects within the scope of the invention defined by the claims following said' Fig. 2 is a view of several of the blanks arranged side by side.

Fig. 3 is a view of one of the blanks, the plotted lines showing the transverse fold mes.

Fig. 4: is a similar view, the longitudinal and transverse fold lines also appearing and additional dotted lines showing the outer` or lateral folds.

Fig. 5 is a view of the blank doubled on itself to present the leaves of the cup, the .dotted lines showing the lateral folds and also the longitudinal fold.

Fig. 6 is a view in elevation ofthe iinished cup. y

Fig, 7 is a perspective view of the cup opened.

Like characters refer t'olike parts throughout the several views. l

As I have already observed one important feature in connection with the method is the fact that I can use stock in weber flat form from which can be out by suitable means, the cup blanks with practically no waste. In Fig. 1 I have shown such a sheet or web 2. As illustrated the side edges of the sheetare straight and in parallelism, which is the preferred relation, l although not always necessary. This sheet is or may be of the material usually employed in making paper drinking cups. It is alternately cut along opposite angles as 3, il, 5 and so on. The web o r, stock 2 is generally in the form of a roll and theweb of paper or equivalent material maybe advanced and cut in a machine or even by hand to'produce the requisite blanks one as 6 of which is shown in said let Fig.- .las wholly severed from the sheet. In I equal angles toward one end of the sheet and naturally diverge toward the other.- vIt will be apparent that when the web or sheet 2 is cut upto form the cup blanks as 6,110 par- Iticle goes to waste unless I exceptthe 'two small triangular pieces `at theends of the web, and they. are of practically no consequence. When a blank as 6 is cut away from the sheet 2, the line of severance between it and the Jfront edge of the sheet defines one edge of the cut blank and the opposite edge of the blank next to be cut and so on.

After a blank as' V'which is merel one" ics of several,

gitudinal creasing of the blank facilitates the opening of the finished cup as best illustrated in Fig. 7. After the blank is scored or creased in the manner to which I have just alluded, it is folded or doubled on itself along the transverse fold line 8 to produce the leaves 9 and 10 which are superimposed upon each other, the two leaves constituting sides of 'the cup. ylfhese are shown in their superimposed relation in Fig. 5. The leaf or side 10 as shown is a trifle longer than the complemental wing or side 9, the. result being that the upper portion of the former extends upwardly beyond the upper edge of the latter, the extending portion of the leaf 10 constituting a finger or thumb v piece which can be grasped to facilitate the opening of the finished cup. There may be cases where I can dispense with the longitudinal crease or fold 7 and rely upon the eX- tension of the leaf 10 to open the cup or vice versa but by providing for both conditions 1 insure the opening of the cup in a highly satisfactory manner. desire to call atten` tion to the fact that the transverse fold lilies S of alternate blanks are situated respectively at opposite sides of the`longitu dinal central line or axis 11 of the. web or sheet 2; this is indicated in Fig. Q. It will be noted that when the blank t3 has been folded or doubled on itself transversely to produce the complemental leaves, the leaf 9 is wider than the leaf 10. As a consequence I will consider the former the wide leaf and the latter the narrow leaf.

After the blank has been doubled or folded on itself transversely to produce the said two leaves, the folded blank laterally folded upon itself on opposite sides along the lines 12 and 13, these fold lines best appearing in Fig. -t and extending longitudinally of the two leaves. By folding the blank laterally on itself I produce side flaps 14: on the wide leaf 9 and side liaps 15 on the leaf 10. The two series of fold linesl l2 and 153 converge inwardl).Y toward the transverse fold which it will be noted constitutes the bottom of the cup the respective lateral fold lines which produce these side" flaps meeting said transverse fold lines. These transverse folds which prot-luce the flaps or tabs extend the complete length of the wide leaf 9 but only parl of the length of the narrow leaff the fold line.` eonimeno ing with the transverse fold and continuing to about a half or a trifle more than a half the height of the cup. This is fully illustrated in Fig. 5. After the fold lines l2 and 13 have been made to secure the side flaps or wings 1l and 15 a suitable adhesive as 16 is applied to these side Wings.

Maestro While generally speaking this adhesive may be applied at any suitable time, it is usually put on after the transverse fold 8 is made. It will be seen that with the blank transversely folded and with the lateral fold lines present, the wings 15 cross the lower ends of the wings 14. The adhesive 16 is 'applied to the lsaid side wings or flaps 14 and 15 near their outer edges as shown in said Fig. 5, the adhesive areas being of such width. however, that when the cup is lin ished, the adhesive will not come against the inner surface of the wide leaf 9 but will attach itself only to the narrow leaf 10 as otherwise opening of the cup'would be prevented. After the adhesive applied. the side wings will be folded over ontothe. narrow leaf 10. and when the adhesive is set, the cup will be finished and in readiness for use.

1t will. of course. be clear that thenarrow leaf of the cup has a side flap or wing as 15 folded on and adhering to itself and that the wider leaf has side wings folded on itself and superimposed on the outer surface of the narrow leaf. The wings of the two side pairs are as shown integral with each other. the result being that when the cup is finished. it will be etfeetually closed against accidental leakage under ordinary conditions for a considerable distance, already observed. slightl)v more than a half from its lower or closed end.l lt will also be noted that the .sides of the cup converge toward the closed end thereof. The importantl fact to which l wish to call attention is that the lateral wings converge toward the closed end of the cup, extending the complete length of the wide leaf 9 for a part of the length of the narrow leaf 10 and what is most im portant that their inner edges are continued approximatelyY to the upper edge of the narrow leaf to which it will be remembered theY Vare adhesivelv united. This last mentioned relation is shown clearly in both Figs. t1 and 7.

it will he remembered that l have re-V ferred to the fact that the blank 6 when flat is longitiulinallv eentrallvv creased at T. it will be understood that when the blank is doubled on itself to form the companion leaves. 9 and 10. this crease will be formed l'irzu-ticallv equally in the `two leaves but the porlions of the crease will be opposite. the result being that when the cup is pressed inward from opposite sides` of the crease its opening is appreciably facilitated without the necessity of having recourse. to the projecting portion or tongue of the longer leaf l0.

if the sheet he of waterproof material it is not necessarxY that the blanks or finished cups should be water proofed. If the opposite be the case waterproofing substance such as paraffin can he applied to the paper or mesetto lblanks on lines alternately at opposite sides of the longitudinal center line of the sheet and finallyv closing against liquid leakage the sides of the 'transversely folded blanks to form drinking cups.

"2. A method of making drinking cups ivhieh comprises cutting from a sheet in web forni a succession of blanks along oppositely inclined angles. so that each cut ivill form the. side of one blank and the side of a succeeding blank, then transversely folding the blanks on lines alternately at opposite sides of the longitudinal center line of the sheet,

and finally in closing ivith an adhesive the sides of the transversely folded blanks to form drinking cups.

3. A method of making drinking cups which comprises cutting from a sheet in web forni a succession of blanks along opposite angles so that each cut ivill forni sides of iininediatel'v succeeding bla nks.- longitudinally centrally scoring the blanks. transversely Jfolding the saine along lines lofated alternately at opposite sides ot the longitudinal central line of the sheet. and finally closing against liquid leakage. the sidesl of the trans-` versely folded blanks to form drinking cups.

4. A method of making a drinking cup from a blank .having converging side edges, which comprises folding the blank on itself along a straight line at one side of the transverse center line of the blank to produce two leaves of different lengths. the side edges of the longer leaf thus converging toward the open end of the folded blank, and the side edges of the shorter leaf diverging toivard said open end. then applyiiig an adhesive to both leaves near their side edges. for the entire length of the short leaf. then folding the lateral portions of both leaves on themselves along lines which diverge toivard the open end of the. blank to cause the parts of the blank which have thc adhesive to adhere only to the outer surface of the long leaf.

A method of making a drinking cup from a blank` having converging side edges, ivhieli comprises folding the blank on itself along a longitudinal inedian line. folding the blank on its-ell' along a straight line at onev side. of the transverse center line of lthe 'blank to produce tvvo leaves of different lcngths. the side edges ofthe longer leaf thus converging toward the open end of the folded blank and the side edges of 'the shorter leaf divergiiig toward said open end7 then applying an adhesive to the leaves near their side edges of the entire length of the short leaf, then folding the lateral portions of both leaves on themselves along lines ivhich diverge toward the open end of the blank to cause parts of the blank which have the adhesive to adhere only to the outer surt'aee of the long leaf. r

tl. A method of making a drinking. cup from a blank having converging side edges, which comprises folding the blank on itself along a straight line extending transversely of the blank to thus produce two leaves, the side edges of one of the leaves converging toward the open end of the folded blank and the side edges o f the other leaf diverging toward said open end. then applying an adhesive to the leaves near their side edges for approximatelvthe entire length of the folds ed blank. then folding the lateral portions of both leaves on themselves along lines which diverge toward the open end of the blank to thus cause the laterally folded portions of the blank provided with the adhesive to adhere only to the outer surface of that part. of said leaf the side edges of which converge toward the open end of the cup.

7. A method of making a drinking cup trom a blank having converging side edges, which comprises folding the blank on itself along a straight line extending transversely of the blank to produce tivo leaves, the side edges of one of the leaves converging toward the open 'end of the blank and the side edges of the other leaf diverging toward said open end, then applying an adhesive t0 the leaves near their side edges for approximately the entire length of the leaves. then folding the lateral portions of both leaves on themselves on lines which diverge toward the open end of the, blank and which cross the lateral portions of the leaf the side edges of which converge toward the open end of the blank for a distance greater than half the length thereof from the transverse fold line, to cause parts of the blank which' have the adhesive to adhere only to the outer surface of the blank the side edges of which converge toivard the said open end.

8. A method of making a drinking cup from a blank having converging side edges, which comprises longitudinally scoring the blank. transversely folding the same to vproduce superimposed leaves,` and then closing the lateral portions of the leaves to produce a drinking cup.

la. L. Mannen

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