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Publication numberUS2265075 A
Publication typeGrant
Publication dateDec 2, 1941
Filing dateAug 7, 1940
Priority dateDec 6, 1939
Publication numberUS 2265075 A, US 2265075A, US-A-2265075, US2265075 A, US2265075A
InventorsKnuetter Paul
Original AssigneeThomas M Royal & Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of making bags
US 2265075 A
Images(1)
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Description  (OCR text may contain errors)

Dec. 2, 1941...

' METHODOF MAKING BAGS Original Filed Decf 6, 19:59

I VP. KNUETTER" 2,265,075

l z imwgir.

' Patented Dec. 2,1941

UNITED STATES PATENTOFFICE 2.265.075 mz'rnon or MAKING ands Paul Knuetter, Philadelphia, Pa assignor to Thomas M. Royal & Company, Philadelphia, Pa., a corporation of Pennsylvania Original application December 6, 1939, Serial No.

Divided and this application August 7; 1940, Serial No. 351,723

1 Claim. (01. 33-35) This invention relates to new and useful improvements in methods for making bags, and more particularly to the making of bags having an expansible square-like bottom' and comprising a single ply of heat-fusible material in which all seams of the bag are formed by fusion thereof, the same being a division co-pending application Serial No. 307,894, filed December 6, 1939;

The principal object of the present-invention is to provide a novel method of producing a bag having its seams disposed at the lateral side edges of the bag and provided with an expansible bottom capable of supporting the bag in an up- :right position. J Another equally important object of the invention is to provide a .novel method for producing ness of the heat-fusible sheet material therein a bag which is constructed and arranged so as to preclude the occurrence of pin holes at the junctionof the side seams and bottom of the bag.

These and other objects of the invention and the various features and details thereof are hereinafter more fully set forth and shown in the accompanying drawing, in which:

Figure 1 is aEview in perspective of a bag protogether as just described, a stronger bottom structure is obtained and a bag may be produced that is free from the possibility of the occurrence of pinholes at the junction of the side scams 4 and bottom.

In addition to-eliminating the occurrence of pin holes at the corners of the bottom of the bag, and generally affording a bottom structure of greater strength, the reentrant bottom fold or tuck 3 is, of course, expansible and thus when expanded provides the bag with a bottom quite duced by the process of the present invention showing the bottom thereof in open or expanded position. v

Figure 2 is a view in perspective of the bag shown in Figure 1 but in flat or collapsed position, certain portions of said bag being broken away td better illustrate various details of its construction.

Figure 3 is a diagrammatic view in perspective of one form of apparatus capable of carrying out the method of the present invention; and

similar to the conventional square type of bag bottom, thereby affording a base which permits the bag to be placed in astanding or upright position as well as rendering it more adaptable for receiving articles or material of a more or Figure 4 is an enlarged view in section taken on line 4-4," Figure 3. 7

Referring now to the drawing, and particularly Figures 1 and 2 thereof, a bag made according to the present invention is designated, l and comprises a single piece or sheet of thermolastic or heat fusible material 2 such as "pliofilm or the like which is substantially doubled upon itself and provided with an inward tuck or reentrant fold 3 transversely and inwardly of the bottom of the bag from edgeto-edge thereof. The lateral side edgesof the heat-fusible sheet material 2 are permanently fused together throughout the entire height of the' bag by the application of heat thereto to form the side seams l thereof and the upper end of said bag is left open as indicated at 5 to permit of the insertion of the desired articles or material therein.

- Upon leaving the forming disk or wheel 'Iythe folded edge of the doubled web is engaged by a less bulky nature.

Manufacture of the bag according to the present invention may be accomplished by drawing the web or sheet of heat-fusible material 2 from a vertically disposed supply .roll 6 and causing said sheet to be engaged by a wheel or disk I which functions to fold or double the'webv as shown in Figure 3 of the drawing. By vertical" adjustment of the disk I with respect to the web 2 the extent to which the folded or doubled portions of said web lap one another may be regulated as desired to provide the mouth of the bag with a projecting'lip or not, as desired.

tucking element 8 which functions to form a longitudinally extending inward tuck or reentrant fold -3 therein of desired depth after which the folded and tucked web is drawn between. a pair of opposed draw-rolls 9 and ill and thence between rollers ii and I2; the latter being provided with a heating element i3 comprising a pair of closely spaced parallel narrow portions I31) and l3c which engage the doubled web transversely thereof and fusibly. seal together the thickness of said web in relatively narrow closely spaced zones [4, ll transversely -mined spaced intervals therealong. I V .a

The web thus fused together transversely at over the entirewldth of said web at predeterperiodic intervals is then conveyed-as shown to a cut-off mechanism comprising a lower stationary cutting element" ligand an upper revolving cutting element I 6 carried by a'roller' ll and'drivenin timed relation to the sealing element l3 so-that bags I are cut from the web alonglines transversely thereof and intermediate the pairedtransversefused zones H, II.

intended that said'invention shall be limited to such disclosure but' that changes and modifications may be'made and embodied therein within the scope of the annexed claim.

I claim: --In the method of making open-mouth bags, the steps comprising advancing a web of heat- 7 fusible material, angular-1y deflecting and 611888! The resulting bags I now ready for-use, may

material to be packaged, the tuck or ree trant be opened and, upon insertion of the'artgtgle or fold 3 lsexpanded as shown in Figure 1 pre ent; ing a substantially flat bottom surface capable of supporting the bag in an upright position.

ing said web along a line longitudinally thereof 'and intermediate its side edges to fold said web into a doubled web in which the thicknesses of said doubled web lap one another in predeterj mined relation with the free edges thereof -residing adjacent one side of the doubled web and defining therebetween the open mouths of the bags, engaging the folded edge portion of the Bags produced according to the present invitation have'the chief advantages of conventional square-bottom bags and at the same time the construction of the bags is such that the occurrence or formation of pin holes in the seam' corners is preventedwhile all of the advantages I of a moisture-proof sealed bag constructed are retained; -After' packaging, the-goods may be sealed within the bag by fusing together the adjacent surfaces of the thermoplastic material at the .top of the bag in the conventional ,manner.

While a particular embodiment of the invenweb with a member operable to tuck said folded edge portion inwardly of the lapped portions of said web to provide a reentrantiold longitudinally thereof, transversely heat-sealing 'the doubled'reentrant folded web from edge to edge thereof in pairs of relatively narrow closely spaced zones spaced. at' intervals along said doubled web, and then severing open-mouth bags I from said doubled web transversely thereof in the spaces. residing between .the narrow closely spaced, pairs of transverse heat-sealed zones of the web.

. PAUL KNUE'II'ER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2435560 *Jan 29, 1944Feb 3, 1948Robinson E S & A CanadaBag making machine and method
US2444685 *May 6, 1942Jul 6, 1948Harry F WatersMultiple fabrication method and apparatus for liquid-tight envelope bags
US2508962 *Jun 23, 1945May 23, 1950Arlington Moore GeorgeContainer
US2524982 *Feb 27, 1947Oct 10, 1950A L Siegel Co IncMethod of manufacturing garment bags
US2581340 *Apr 18, 1947Jan 8, 1952Disposable Bottle CorpAssociated equipment for nursing units
US2648463 *May 8, 1948Aug 11, 1953Scherer Corp R PPlastic container with rupturable sealed end
US2673024 *Jun 11, 1951Mar 23, 1954Ralph L KussFlat bottomed tubular container
US2673495 *Mar 13, 1946Mar 30, 1954Continental Can CoMethod and apparatus for making bags
US2687066 *Jun 26, 1951Aug 24, 1954Kraft Bag CorpMachine and method for making valve bags
US2718105 *Dec 31, 1948Sep 20, 1955J L Ferguson CompanyBag-like containers of flexible strip material, process of making same, process of filling same, and apparatus for accomplishing these purposes
US2748673 *Mar 9, 1951Jun 5, 1956Hedwin CorpLiner for composite containers
US2779144 *Dec 10, 1952Jan 29, 1957Walter P NailMethod of making pouches
US2884183 *May 9, 1956Apr 28, 1959Morris FrankelPackaging or wrapping devices
US2998183 *Oct 20, 1958Aug 29, 1961Milprint IncComposite container
US3006257 *Oct 1, 1957Oct 31, 1961Plastus SaMethod for producing bags and the like containers of thermo-weldable material through welding of elementary component parts
US3051605 *Nov 20, 1958Aug 28, 1962Forrest B StannardMethod of making valved bags from extruded thermoplastic materials
US3117711 *May 23, 1961Jan 14, 1964Natro Cellulosa S P APlastic bag
US3119548 *Jun 8, 1961Jan 28, 1964Dale Products Plastics LtdPlastic bags
US3124298 *Oct 31, 1960Mar 10, 1964 Elastic
US3147009 *Nov 8, 1962Sep 1, 1964Gram Brdr AsStrip folding mechanism for a packing machine
US3172796 *Sep 23, 1960Mar 9, 1965Gulker HeinzMethod of forming conical-shaped containers of thermoplastic material
US3194124 *Nov 17, 1961Jul 13, 1965Flex O Glass IncMethod of forming tear-off bag supply
US3208660 *Sep 12, 1962Sep 28, 1965Vision Wrap Ind IncGrommet bag
US3226009 *Jun 9, 1961Dec 28, 1965Bemis Bro Bag CoBag
US3249286 *Sep 28, 1964May 3, 1966Monsanto CoReinforced plastic bag
US3256976 *Mar 9, 1965Jun 21, 1966Continental Can CoGusseted, contoured plastic bag for garment packaging
US3263576 *Jun 18, 1963Aug 2, 1966Ellenbogen Herbert AMethod of making envelopes
US3276672 *Jan 6, 1965Oct 4, 1966Bemis Co IncBag
US3279331 *Jul 1, 1964Oct 18, 1966Platt Eric WProcess in the manufacture of flexible containers
US3283994 *Apr 19, 1965Nov 8, 1966Bemis Co IncBag
US3291374 *Mar 30, 1965Dec 13, 1966Albemarle Paper Mfg CompanyMulti-ply bag and process for the manufacture thereof
US3295289 *Feb 11, 1964Jan 3, 1967Eastman Kodak CoPouch forming and filling method and apparatus
US3326449 *May 13, 1965Jun 20, 1967British Visqueen LtdGusseted plastic bag
US3349993 *Jun 12, 1963Oct 31, 1967Package Products Company IncPackage
US3352214 *May 10, 1965Nov 14, 1967Ralston & Co Canada Ltd WMethod of making containers
US3355303 *Jun 29, 1964Nov 28, 1967American Can CoBread package
US3358823 *Jan 16, 1967Dec 19, 1967Paxton Allen DGusset bottom bags in roll form and method of making same
US3380646 *Nov 12, 1963Apr 30, 1968Louis DoyenContainer of plastic material and method of producing same
US3411698 *Sep 9, 1966Nov 19, 1968Reynolds Metals CoBag-like container means
US3437258 *Jul 20, 1967Apr 8, 1969Kugler EmanuelSelf-supporting liquid bag
US3459361 *Nov 6, 1967Aug 5, 1969Matton Harry ETransparent filing envelope with index
US3530020 *Feb 9, 1967Sep 22, 1970Novotex IncProcess of manufacturing a bonded fiber pillow
US3654015 *Nov 5, 1968Apr 4, 1972Bartlett David S JrMethod of making pillow cases
US3956045 *Mar 25, 1974May 11, 1976Hoffman Louis SMethod and apparatus for bonding layers of resinous material
US4119267 *Aug 18, 1976Oct 10, 1978Agis Frank KydonieusBlood and intravenous solution bag
US4394955 *Feb 20, 1981Jul 26, 1983Plicon CorporationBag with bendable retainer strip, and method of making the same
US4650530 *Mar 10, 1986Mar 17, 1987Kimberly-Clark CorporationUse in commercial high-speed operations
US4691368 *Jun 20, 1985Sep 1, 1987Ocor Products CorporationFlexible block packaging
US4705707 *Dec 17, 1985Nov 10, 1987Presto Products, IncorporatedMultilayer, food packaging
US4716061 *Dec 17, 1985Dec 29, 1987Presto Products, IncorporatedMultilayer-base, heat seal and tie layer consisting of a modified polyolefin, ethylene copolymer or blends thereof
US4765999 *Jul 26, 1985Aug 23, 1988Presto Products, IncorporatedPolyester/copolyester coextruded packaging film
US4837849 *Mar 21, 1988Jun 6, 1989The Dow Chemical CompanyStand-up plastic bag and method of making same
US4946743 *Oct 14, 1988Aug 7, 1990Reynolds Consumer Products, Inc.Nonoriented polyester films for lidding stock with modified heat seal layer
US4954124 *Jan 30, 1989Sep 4, 1990The Dow Chemical CompanyStand-up plastic bag and method of making same
US5080643 *Jun 5, 1990Jan 14, 1992Dow Brands Inc.Method of making a stand-up plastic bag
US5273514 *Jul 30, 1991Dec 28, 1993Colgate-Palmolive CompanyMethod for making a flexible pouch
US5350240 *Dec 17, 1991Sep 27, 1994S. C. Johnson & Son, Inc.Stand-up pouch having cross-seal feature and method of making
US5375390 *Jul 12, 1993Dec 27, 1994Technopac, Inc.Machine for making and positioning bags made of hot-melt plastic material
US5468206 *Mar 19, 1993Nov 21, 1995Jebco Packaging Systems, Inc.Container
US5716473 *Apr 25, 1995Feb 10, 1998International PaperMethod of making a semi-rigid cereal carton
US6006905 *Apr 16, 1998Dec 28, 1999Campbell, Jr.; Robert L.Protective bag for shipment and storage of articles of equipment and method of fabricating same
US6189692Aug 27, 1999Feb 20, 2001Robert L. Campbell, Jr.Protective bag for shipment and storage of articles of equipment and method of fabricating same
US6216424 *May 11, 2000Apr 17, 2001Sumitomo Bakelite Company LimitedMethods for producing a self-supporting bag and package
US6217689Jun 9, 1998Apr 17, 2001Norcen IndustriesApparatus and method for manufacturing packing material
US6228195Feb 8, 1999May 8, 2001Star Binding & Trimming Corp.Sonic sealed bias seam
US6428459Jan 25, 2001Aug 6, 2002Robert L. Campbell, Jr.Protective bag for shipment and storage of articles of equipment and method of fabricating same
US6598373Feb 13, 2001Jul 29, 2003Sealed Air Corporation (Us)Apparatus and method for forming inflated containers
US6651406Jun 20, 2001Nov 25, 2003Sealed Air Corporation (Us)Apparatus and method for forming inflated containers
US6679034 *Apr 30, 2002Jan 20, 2004Recot, Inc.Vertical stand-up pouch quick change module
US6722106 *Mar 18, 2002Apr 20, 2004Recot, Inc.Vertical stand-up pouch
US6729109 *Apr 17, 2002May 4, 2004Recot, Inc.Method and apparatus for making flat bottom bags
US6804933Jan 17, 2003Oct 19, 2004Sealed Air Corporation (Us)Conveying web of film comprising pre-formed flexible containers; withdrawal from rotatable supply roll; controlling tension; applying frictional force; gas flow into apertures; sealing
US6926654 *Jul 29, 2004Aug 9, 2005Uni-Charm CorporationMethod and apparatus for folding continuously fed web in two
US7022058Feb 21, 2002Apr 4, 2006Tilia International, Inc.Method for preparing air channel-equipped film for use in vacuum package
US7087130Mar 4, 2004Aug 8, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging
US7115086Aug 20, 2004Oct 3, 2006Automated Solutions, LlcQueue-based bag forming system and method
US7138025Mar 4, 2004Nov 21, 2006Tilia International, Inc.Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
US7144357 *Apr 8, 2005Dec 5, 2006Uni-Charm CorporationMethod and apparatus for folding continuously fed web in two
US7165375Feb 5, 2005Jan 23, 2007Sealed Air Corporation (Us)Inflation device for forming inflated containers
US7220053Dec 14, 2004May 22, 2007Sunbeam Products, Inc.Flexible composite bag for vacuum sealing
US7220476Jan 25, 2002May 22, 2007Sealed Air Corporation (Us)Apparatus and method for forming inflated chambers
US7225599Apr 5, 2005Jun 5, 2007Sealed Air CorporationApparatus and method for forming inflated articles
US7254930Nov 18, 2005Aug 14, 2007Frito-Lay North America, Inc.Stationary tucker bar mechanism
US7299608May 9, 2005Nov 27, 2007Frito-Lay North America, Inc.Quick change module with adjustable former attachments
US7320661Dec 9, 2005Jan 22, 2008Automated Solutions, LlcQueue-based bag forming system and method
US7389626Apr 4, 2007Jun 24, 2008Sealed Air Corporation (Us)Apparatus and method for forming inflated articles
US7429304Jul 14, 2005Sep 30, 2008Sealed Air CorporationHigh-speed apparatus and method for forming inflated chambers
US7476192Nov 7, 2007Jan 13, 2009Automated Solutions, LlcQueue-based bag forming system and method
US7500340Oct 19, 2007Mar 10, 2009Frito-Lay North America, Inc.Quick change module with adjustable former attachments
US7517484Mar 15, 2004Apr 14, 2009Sunbeam Products, Inc.Forming evacuation channels during single and multi-layer extrusion process
US7534039Jul 19, 2005May 19, 2009Sunbeam Products, Inc.Vacuum packaging films patterned with protruding cavernous structures
US7552574May 9, 2005Jun 30, 2009Frito-Lay North America, Inc.Variable tension gusseting system
US7625459Jun 30, 2006Dec 1, 2009Sunbeam Products, Inc.Method for manufacturing liquid-trapping bag for use in vacuum packaging
US7721781Sep 19, 2006May 25, 2010Sealed Air CorporationApparatus and method for forming inflated chambers
US7802416 *Aug 22, 2006Sep 28, 2010Marko I.R.D.C. Inc.Method for automated bagging
US7908826 *Nov 12, 2004Mar 22, 2011Frito-Lay North America, Inc.Method and apparatus for providing end seals on vertical stand-up packages
US7922640Sep 7, 2006Apr 12, 2011Bod Packaging Equipment, Inc.Machine for making bags
US8020358Nov 2, 2004Sep 20, 2011Sealed Air Corporation (Us)Apparatus and method for forming inflated containers
US8132395Jun 25, 2009Mar 13, 2012Frito-Lay North America, Inc.Variable tension gusseting system
DE900169C *Dec 11, 1951Dec 21, 1953Fischer & Krecke KgVerfahren und Maschine zum Herstellen von Flachbeuteln
DE1033021B *Apr 5, 1955Jun 26, 1958Kalle & Co AgVerfahren zum fortlaufenden Herstellen von Seitennahtbeuteln mit Bodenfalte
WO2006055128A2 *Oct 12, 2005May 26, 2006Frito Lay North America IncImproved method and apparatus for providing end seals on vertical stand-up packages
Classifications
U.S. Classification493/197, 53/562, 53/455, 383/122, 156/308.4, 156/203, 493/208, 493/248
International ClassificationB31B37/00, B29C53/04
Cooperative ClassificationB29C53/043, B31B37/00, B31B2237/20
European ClassificationB31B37/00, B29C53/04B