Патент USA US2406061код для вставки
Patented Aug. 20, 1946 2,406,061 UNITED STATES PATENT OFFICE21,406,061 SIFTPROOF CARTON Thomas F. Cass, Jr., Wayne, lll., assignor to Con tainer Corporation of America, Chicago, Ill., a. corporation of ,Delaware Application April 28, 1944, Serial No. 533,128 4 Claims. (Cl. 229-14) `l 2 yThe invention relates to sift-proof cartons, and more particularly to cartons especially adapted for packaging finely divided material, formed of ordinary paperboard, and the other layer comprising a suitable liner B which may either be a paper sheet secured. to the paper board portion by means of an adhesive such as amorphous wax or similar composition, or may be a moisture and vapor-proof substance such as such as salt, sugar, soap flakes and washing powder. The principal object of the invention is to provide a carton which may be tightly sealed l so as to prevent loss or sifting of material from the carton. Another object of the invention is to provide a sift-proof, lined carton which may be glassine, parchment, cellophane, “Pliofilm” or the like. ' ' Referring to Fig. 1, the carton blank as shown moisture-proof and grease-proof. n 10 comprises a body portion including a pair of In accordance with the preferred embodiments wide panels I0, I0 and >a pair of narrow panels of the invention, these are accomplished by pro II , I I, although if desired all the panels could be viding a paperboard blank from which the carton of the same width. Extending beyond one of is to be formed with a lining sheet preferably se the narrow panels I I is a lined sealing flap I2, cured thereto by means of an adhesive, such'as 15 While extending from the opposite panel Ill is amorphous wax or a similar composition. The` an extension I3 of the liner B only, the stock blank is then die-cut to form end ñaps, but in portion A of the carton terminating at the Ver stead of cutting the entire flap through the tical line I5 and its extensions 22, 22. The panels paperboard and liner a portion of the liner is left I0, II and I2 are separated from each other by uncut so that when the inner end ñaps are folded any suitable means, as for example vertical score downwardly the uncut portions of the liner will 20 lines I4, I4, while horizontal score lines I6, I6 draw away from the adjacent flaps and form a may be provided for separating the main panels bellows corner, and when the seal is completed III and II from sealing panels I'I and I8, the by folding down the outer flaps a completely reference numerals I'I designating the relatively sift-proof carton is provided. 25 wide extension flaps, and the reference numer als I8 designating the narrow extension flaps The invention will be more readilyr understood by reference to the accompanying ‘drawing and the following detailed description, in which are set forth an illustrative embodiment of the in ventive thought. In the drawing: projecting beyond the panels II, II. The liner extension I3 may also be provided with extensions I9, I9 separated therefrom, if desired, by suitable 30 score lines'. To form the sealing or extension ñaps I'I and I8 Fig. 1 is a plan view of a lined blank from the blank is die-cut in such a manner that slots which the carton may be formed; 20 are formed separating the ñaps, which slots Fig. 2 is a View of the carton embodying the in vention, with all but one of the end flaps turned 35 extend entirely through the paperboard portion Aof the blank to the horizontal lines I 6, and down, the turned down outer end flap being par also extend through the liner down to points a tially broken away to show the bellows corner short distance from lthe fold line, leaving un by means of which the sealing is obtained; severed portions 2| which, when the extension Fig. 3 is a detailed fragmentary view of one of the corners of the box before the end flaps have 40 flaps >are folded down, are adapted to form corner seals which eifectively prevent sifting of the been turned down, this View showing the ex tension sealing flaps of both .the carton and the material. Similarly the liner iiap portions I9 liner; are separated from the flaps I'I by means of cuts Fig. 4 is a sectional view on the line 4~-4 of 22 which extend down to uncut portions 23 cor Fig. 1; 45 responding with the uncut portions 2l, 2| at Fig. 5 is a sectional view on the line 5-5 of Fig. 2, but with the 1ast of the sealing flaps closed; and Fig. 6 is a detail perspective view on an en- I the ends of the die-cuts 20. In setting up the box the panels are folded to tubular form along the lines I4, III and are se cured in place by means of the external ñap I2 larged scale showing one of the corner seals. 50 and the internal liner extension I3, these being Referring to the drawing in detail, and with preferably secured in place by means of Suit particular reference to Fig. 4 thereof, it wil1 be able adhesive. These iiaps in their securing po noted that the carton is formed of two layers, sition are indicated in Fig. 3. It will be noted one designated at A comprising the main or stock that as shown the flap I2 terminates short of portion of the carton and being preferably 55 the sealing flaps I'I and I8, whereas the portions 2,406,061 3 4 I9, I9 of the liner extension I3 extend to the ively secured to its entire inner surface,'said outer limits of the sealing flaps I‘I and I8. blank being cut and scored to provide a plurality To close the carton the narrow flaps I8, I8 are of side wall panels and closure flaps integrally ñrst folded downwardly into horizontal position, joined to said panels along a score line, said as illustrated in Fig. 2. As these ñaps are folded 5 closure ñaps being deiined from adjacent flaps into sealing position the uncut portions 2|, 2| by cuts in said sheet of paperboard extending of theliner will tear away. from the adjacent outwardly from said score line and cuts in said flaps I'I,v I'I and’form-abellows corner 25. When .sheet of lining material coinciding with said the seal of the box is completed on folding down `inst-mentioned cuts but extending outwardly the outer iiaps I‘I, I'I the bellows corner will-be 10 only from points substantially outwardly spaced folded over, as indicated in Fig. 5, and will be :from said score line. retained between the various layers of;1the...end , 3.‘A_» folding carton formed from a sheet of sealing iiaps, thus effectively` preventing sifting _paperboard having -,a sheet of lining material of the contents. securedy to its entire inner surface by means of The invention has been’described in detail' for"l5.„an~ amorphous wax or similar adhesive com- ’ It will be obvious prising four rectangular side wall panels having that numerous modifications' and variations'may the purpose of illustration. ' integral rectangular closure flaps joined thereto be resorted to without departing from` the spirit alonga-score line, a lateral extension of said pa of the invention Thus the composition ofthe perboard on one of said side wall panels adapted liner may be varied as desired, and also the flap 20 to be secured to another of said side wall panels "extensions 'I2 and I3 may be varied or omitted, > to form a tubular carton body, a lateral extension *provided'other'suitable corner-sealing means is substituted. 'The' size of the bellows corners 25, of- said lining material on one of said side wall panels, and an end extension on said last-men " l25"wil1 be > dependent lon the length of the cuts tioned lateral extension, the paperboard portions 42l,` 2l, but should preferably be comparatively ¿25 of Vsaid closure iiaps being deñned from each HIsnialler-and’only s'uñicient to- eiîectively close the other by cuts therein extending outwardly from `‘corners ‘of the cartons. I claim; 'said score line and the lining material portions of said closure flaps and said end extension be ' 1;'A folding -carton-‘formed’from a sheet of ing defined from each other by cuts therein> ex ^` paperboard having a sheet'of lining material ad- îT30 tending outwardly only from points substantially "hesively secured to its entire inner Asurface inoutwardly spaced from said score line. i’cluding aplurality'of’adjacent side wall panels '4. vA -folding carton formed'from a sheet of and a plurality of closure flaps integrally joined 'paperboard having a1 sheet of lining material to ~said Ypanels along a' score line, said closure secured to its entire inner surface by means of ‘ iiaps being deiined“ from 'adjacent flaps -by cutsïf~35 an amorphous wax or similar adhesive including “extending completely through said sheet of paa` plurality of adjacent side vpanels and a plu perboard substantially to said score line and exrality of closure naps integrally joined to said tendingL through said’ sheet of lining material ypanels along a scoreiline, said closure flaps being >`only to pointsslightly but substantially removed '"frorn`said score'line. ` 2.`AV folding- carton blank having »elements ' ' adapted-'to provideY a sift-proof closure at least '- at one end thereof comprising a sheet of Vpaper- *"»boardïhaving-a'sheetfof liningrrmate'rial- adhes- 'defined from adjacent iiaps by cuts extending ('40 completelythrough said paperboard sheet out ‘wardly ‘from said score line and extending out >wardly through said sheet ofv lining material only V'from points spaced outwardly of said scoreline. VTHOMAS F. CASS, JR.