Square Bottom Patents (Class 493/936)
  • Patent number: 8790230
    Abstract: A flat bottom, stand-up bag and a method of manufacturing the bag is provided. The bag includes a bottom wall, opposing front and rear walls and two side walls. The side walls connect the front and rear walls and the bottom wall is connected to the other walls at their lower edge. The bag preferably incorporates a continuous polymer web material forming the front wall and rear wall of the bag, as well as the bottom wall. The side walls include gussets and a triangular base portion formed at the intersection between the bottom wall and the side walls.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: July 29, 2014
    Assignee: Anapo Plastics, LLC
    Inventor: Carmelo Piraneo
  • Patent number: 6805660
    Abstract: A process for manufacturing a flat-bottom bag is disclosed. The process comprises the steps of providing a bag preform and a patch, the patch having a first adhesive coating thereon. The preform is positioned at an open configuration thereof, whereat its flaps extend substantially away from one another. Thereafter, the patch is positioned a sealing position against the preform, with the first adhesive coating therebetween, to form a preform/patch composite. Thence, a second adhesive coating is applied on the preform/patch composite, and the flaps are folded, in sequence, onto the gusset panels, to respective closure positions, where they are secured by the second adhesive coating.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: October 19, 2004
    Inventor: Doug Finch
  • Patent number: 6471629
    Abstract: An apparatus for the formation of packaging from unitary blanks comprising a first tool having a convex end surface said convex end surface having edges that define a first center segment and a first plurality of triangular segments and a second tool having a concave end surface said concave end surface having edges that define a second center segment and a second plurality of triangular segments.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: October 29, 2002
    Inventor: Aliseo Gentile
  • Patent number: 6319184
    Abstract: A process of cold sealing two layers of plastic film material together is used as part of the structural element of a plastic bag made from plastic film. The bag has a closed bottom, a continuous closed periphery, and an open top. The improvement provides the bag with a cold seal, which cold seal does not form a part of the closed bottom and continuous closed periphery of the bag. In the improved process, it is required that the first and second plastic films of the bag be confronted to one another in a disposition for sealing. Compression dies are provided on at least one side of the juxtaposed first and second plastic films, the compression dies are provided with the size and shape of the cold seal desired. Impressing of the compression dies across the juxtaposed first and second plastic films occurs. This impressing is at a temperature and pressure sufficient to fuse the first and second plastic films together.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: November 20, 2001
    Assignee: Bob Dematteis Co.
    Inventors: Robert B. DeMatteis, Donald Pansier
  • Patent number: 6220998
    Abstract: A method of manufacturing a container having a plurality of side panels, a floor panel having corner sections, and a side panel forming an enclosure having an open top. Each side panel includes a web having a perimeter, an edging attached to the perimeter forming a pocket, and a frame having two ends. Each side panel has a first side and at least two lateral sides.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: April 24, 2001
    Assignee: Bajer Design & Marketing, Inc.
    Inventors: Michael S. Kellogg, Dean B. Krotts
  • Patent number: 6195965
    Abstract: A method for manufacturing a plurality of containers from a tube of flexible packaging material includes transversely severing the tube into a plurality of individual containers, each having a main body with two opposed pointed lower corners, pinching each pointed lower corner to collapse the corner into a flattened triangular shape while adding heat to the same in order to well the corner together in the flattened condition, and bending each flattened corner to lie under its respective main body, while the flattened corner still retains heat.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: March 6, 2001
    Assignee: Arkmount Systems Inc.
    Inventor: Stefan Tobolka
  • Patent number: 6068585
    Abstract: A gored packing bag which comprises a front body 1, a rear body 2, gores 3,4 formed by gluing the front body and the rear body into a combined situation, and a pair of fasteners 5, 6 in arranged between the front or rear body and the gores, one of a base tape being glued as a whole on an inner surface of the front or rear body close to an open end thereof, while both end portions of the other base tape 8 being glued to a half side of gore 28,29 facing to the front and an intermediate remainder of the gores in the width direction being glued on a corresponding inner surface of the front or rear body, and a fixed portion 30, 31 of remaindered gores in the width direction being glued on a corresponding inner surface of the front or back body.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: May 30, 2000
    Inventor: Toshikatu Ouchi
  • Patent number: 6056681
    Abstract: A method and apparatus for forming flat-bottomed plastic bags uses a flattened plastic tubing as a raw material. The tubing is unwound from a roll, and is passed around a gusset plate assembly, where guide members on opposite sides of the gusset plate assembly guide outside edges of the tubing inwardly between a pair of gusset plates to form gussets in the tubing. In a preferred embodiment, microperforations are formed in the bag material to provide ventilation to the finished bags.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 2, 2000
    Inventor: Philip E. Ross
  • Patent number: 6042526
    Abstract: In a method and apparatus of making the bottom of a flat tubular section, a tubular section is transported by a conveyor at a continuous rate in an alignment transversely to a longitudinal direction of the conveyor, with a first suction unit partially opening one end of the tubular section. Subsequently, a spreader unit is inserted into the partially open end of the tubular section and moved in a first phase in a substantially linear horizontal motion toward an end position in which the spreading unit conforms to fold lines of a finished bag bottom. In a second phase, the spreader unit swings from a substantially horizontal alignment into a substantially vertical position about a horizontal pivot axis by way of a compound motion in which a movement of the spreading unit into the end position is superimposed by a movement into the vertical position, thereby forming the open bag bottom.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: March 28, 2000
    Assignee: B + B Maschinenbau GmbH
    Inventor: Josef Baumer
  • Patent number: 5947884
    Abstract: A carry out bag having a base portion of which opposing two sides are facing each other, first side portions extending from the opposing two sides of the base portion until a middle area of the base portion respectively, and second side portions extending from the first side portions extended until the middle area and toward an opposite direction to that of the first side portions. The other both sides of the first side portions are bonded to the base portion. Putting an article across the both second side portions not to block up the hand grips therewith, and taking out the hand grips to pull out from the article and to separate the second side portions one from the other, so that the article is received in the carry out bag.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: September 7, 1999
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Shigeya Sasaki, Shinji Kobayashi, Shuichi Gotoh
  • Patent number: 5913764
    Abstract: A method for manufacturing flat-bottom bags with a glued-in bottom lining includes the steps of applying a contact adhesive, which develops a desired adhesive force only when two surfaces, both of which are coated with the contact adhesive, are pressed against one another, onto a starting material for the bag, subsequently closing the starting material into a tube, supplying the tube to a bottom-laying station to produce a flat-positioned bottom of the bag, and completing gluing by exertion of pressure on the flat-positioned bottom of the bag after the bottom lining has been placed upon the flat-positioned bottom.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: June 22, 1999
    Assignee: Fischer & Krecke GmbH & Co.
    Inventors: Wilfried Kolbe, Hans-Rudolph Van Den Maagdenberg, Gunter Niemeyer, Diethard Obermeier, Klaus Schirrich
  • Patent number: 5868658
    Abstract: The invention relates to a method of and an apparatus for producing beverage containers.For making beverage containers having a piercable through-hole for a straw in their front sheeting, which is sealed on the inside of the front sheeting by means of a closure strip, a piercing hole is formed in a front side sheeting web conveyed in conveying direction, whereafter a closure sheeting web is fed in conveying direction to the front side sheeting web and is then sealed around the piercing hole to the inside of the front side sheeting web. A rear side sheeting web is supplied in conveying direction such that the inside of the front side sheeting web welded to the closure sheeting web moving along with the latter faces the inside of the front side sheeting web. Thereafter, the front side sheeting web and the rear side sheeting web are welded together at least in part along the lateral edges of the beverage container to be produced, with the closure sheeting web being included therein.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: February 9, 1999
    Assignees: Deutsche SiSi-Werke GmbH & Co., Betriebs KG
    Inventor: Rainer Wild
  • Patent number: 5857952
    Abstract: A flat trapezoidal container provides a generally frustoconical single cavity for snugly sheathing a flower pot. The container is specifically dimensioned sheath a flower pot so as either (a) to leave therebeneath, a surplus of film in an transition zone which is concealable under the flower pot, or (b) form a hexagonal gusset in the bottom. The container is made from two flat panels of heat-sealable film, each shaped in the general form of a trapezium; or from a single web folded double. The lower portion of the container is ornamentally imprinted along a border extending beneath a generally lateral line above the longitudinal axis of the web; and, with a marker in the upper portion, identifies the contents, or provides instructions for their use or care. When the cavity is distended by being partially filled, the entire container, except for a transition zone, presents a smoothly arcuate surface of the frustum of a cone.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: January 12, 1999
    Assignee: Professional Package Company
    Inventor: Scott Robert Gilbert
  • Patent number: 5795283
    Abstract: A decorative bag making apparatus 10 and method of use wherein the apparatus 10 comprises a sizing unit 11, a centerpiece unit 12, and a face unit 13 which cooperate with one another and a sheet of decorative material 100 to fabricate a finished decorative bag 110.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 18, 1998
    Inventor: Nicholas K. Romer
  • Patent number: 5762595
    Abstract: A flat-sitting bottom end closure for liquid filled, thermoplastic-coated paperboard containers, and mechanism for forming same. The mechanism includes an indexible rotor having a plurality of mandrels on which tubular container blanks are mounted, wherein each mandrel has an end cap defining a configuration which, in conjunction with a complementary pressure pad, produces four flat corner portions or pedestals on the container bottom end closure when confined between the pressure pad and each end cap.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 9, 1998
    Assignee: Elopak Systems AG
    Inventors: Gonzalo D. Santiago, Michael L. Davis
  • Patent number: 5549538
    Abstract: A process for manufacturing a multi-ply square bottom bag having a front wall, a back wall, a pair of gusseted side walls, each of which join to said front and back walls. There is also formed a gusseted square bottom panel having spaced but substantially parallel gusset edges and said bottom is joined to the front, back and side walls. The bag is produced by providing a web of inner ply material and a web of outer ply material, adhesively joining said webs into a composite and forming said bag from said joined webs. The improvement relates to forming a first flap in the inner web by cutting the web so as to form a plurality of free edges and a hinge line for said flap. The hinge line is connected to the free edges so that the free edges and hinge line define the flap. Thereafter joining the inner and outer webs to form the composite web.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: August 27, 1996
    Assignee: Bagcraft Corporation of America
    Inventor: Ronald Marsik
  • Patent number: 5273362
    Abstract: Containers are produced from a sheet of flexible material having a thermally bondable inside surface. In one embodiment flaps are formed and folded outwardly to form two windows in the sheet. Pleats are formed and bonded to transverse the windows so that a pleat ply closes the windows. The pleats are folded to bring the flaps against the window closing pleat plies and bonded. In another emobdiment holes are cut in the sheet located in one ply of the pleats.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: December 28, 1993
    Assignee: Jebco Packaging Systems, Inc.
    Inventor: Jerry E. Buchanan
  • Patent number: 5135463
    Abstract: A pressure pad is provided for bottom sealing of a gable carton. The pressure pad cooperates with a mandrel which is urged into an opened-top gable carton for sealing the carton bottom. The pressure pad is provided with a sealing bar matrix which is disposed thereon to register with at least selected raw edges of paperboard material on the carton bottom. Each sealing bar functions to compress the fibrous paperboard material from which the carton is formed to render the raw edges less likely to absorb liquids that may be wicked from the raw edges to other locations in the carton. The carton formed by the pressure pad is characterized by reduced thickness raw edges adjacent the bottom.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: August 4, 1992
    Assignee: Champion International Corporation
    Inventor: Kenneth J. Hyduk
  • Patent number: 5135464
    Abstract: A container and method of making the same preferably from a single web of flexible material wherein the method comprises placing a V-fold, or modified flat V-fold, in a sheet of such material, creating two subsections whose V-fold members are attached to the respective subsections preferably along a longitudinal fold line. First and second side edge weld lines are made thereby connecting the respective subsections to their own V-fold members as well as those of the opposite subsections. Oblique weld lines then interconnect the point of intersection of the side edge weld lines and longitudinal fold line. The bottom wall is formed by folding the legs inwardly with the endmost portions of which pivoting along a lateral axis of the bottom wall upwardly towards the first and second side edge weld line thereby reinforcing the stress-bearing bottom.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: August 4, 1992
    Assignee: Jebco Packaging Systems, Inc.
    Inventor: Jerry E. Buchanan
  • Patent number: 5102383
    Abstract: A method for manufacturing a sack or bag with a bottom being rectangular in the filled state and a handle portion joined thereto. An economical method for production by machine, according to the invention includes the following steps carried out sequently. A flattened tube piece (10) is provided with two slits at one end. The slits are substantially parallel to each other and to the lateral edges of the tube. Then a bottom square is formed by folding the tube piece near the slit end with corner tucks (14) and side tucks (16, 18). A prefabricated handle portion (22), including a reinforcing strip (24) and a connection strip (26) is glued or welded such that an edge portion (20) of one side tuck (16) is not covered by the prefabricated handle portion. Subsequently, such side tuck (16) and the corner tucks (14) are folded along a fold line (28) extending through the center of the corner tucks (14) and the uncovered edge portion (20) is glued or welded to the corresponding adjacent section of the handle portion.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: April 7, 1992
    Assignee: Windnoller & Holscher
    Inventors: Fritz Achelpohl, Werner Jurgens
  • Patent number: 5102384
    Abstract: A method is disclosed of constructing a flat bottom in a plastic film tube having an open upper end, a closed lower end formed by a transverse seal, forward and rearward sides and a pair of opposing pleated sides that interconnect the forward and rearward sides. The method includes the steps of releasably engaging a lower vacuum and a lower clamp with a transverse section of the rearward side of the tube to provisionally hold the transverse section. A lateral section of the forward side is gripped and raised by an upper vacuum and an upper clamp to expose a portion of the pleated sides such that first and second pockets are formed, respectively, in the sides.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: April 7, 1992
    Inventors: Philip E. Ross, Martin J. Brown, deceased, Maureen Hagenburg, heir, Letitia A. Brown, heir, Christine M. Weiss, heir
  • Patent number: 4685276
    Abstract: Bottom-fold bags, made of endless tubular material, which can be made of endless flat material and having a substantially rectangular standing-surface, together with a method and apparatus for producing and filling such bags are disclosed. Two lateral, substantially triangular bottom-flaps, in the vicinity of which the tubular material is in three layers, are produced. The tubular material is folded-in from the sides of the bag being formed and a bottom longitudinal seam is formed by pressing the tubular material together and connecting together the layers of tubular material thus caused to bear upon one another. At least the two layers of the bottom-flaps facing away from the bottom-surface of the bag are united longitudinally. At least one connecting seam, arranged near the lateral edge of the bag, and at least one connecting seam, arranged near the apex of each triangular bottom-flap are provided, substantially at right angles to the bottom longitudinal seam.
    Type: Grant
    Filed: December 28, 1985
    Date of Patent: August 11, 1987
    Assignee: Effem GmbH
    Inventor: Hans R. Kiel
  • Patent number: 4649696
    Abstract: Welding and cutting process in which the bag is disposed in a holding unit (107) supporting and positioning it, and is composed of a side plate (108), a stop plate (109), and a closing angle member.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: March 17, 1987
    Assignee: Societe Generale des Eaux Minerales
    Inventors: Georges Brie, Michel Cazes
  • Patent number: 4636190
    Abstract: A web of interconnected plastic bags with gusset folds. Each bag is provided with first fold part seals (8, 9, 10, 11) and with second fold part seals (13, 14, 15, 16). Additional seals (36) extend parallel to fold edges of the foil and are connected with subsequent first and second fold part seals. The additional seals (30) are in the region between inner (4, 4a) and outer (2, 3 and 2a, 3a) fold edges.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: January 13, 1987
    Assignee: Wavin B.V.
    Inventor: Kornelis Herder
  • Patent number: 4566927
    Abstract: A method and apparatus for high speed pouch or bag making from thin, heat-sensitive thermoplastic film webs or multiply webs of paper, film and foil in which the seal pattern may be simple or complex sealing and in which the method is applied to a continuously moving web and sealing is achieved at temperatures below the softening temperatures of the film or the sealing interfaces. A method of forming an open pouch comprising the steps of continuously driving an elongated web of pouch forming material at a constant speed along a pouch making path which extends continuously through a web coating station, a web collating station, an E.B. curing station and a web cutting station. A pattern of a coating is applied to a first surface of a first continuous web of pouch forming material as it is driven continuously through the web coating station to render the interface bondable at a seal line and non-bondable in the area of the storage compartment when subjected to electron beam radiation.
    Type: Grant
    Filed: December 2, 1980
    Date of Patent: January 28, 1986
    Inventor: James R. Wood
  • Patent number: 4526565
    Abstract: A flat bottom plastic film bag includes triangular gusset portions formed by a plurality of parallel heat welds which fuse portions of opposed pleats together and cooperate with a transverse central bottom seam to form a flat bottom bag from a seamed or seamless plastic film tube. The longitudinal side and end walls of the bag are provided with heat embossed corrugations which enhance the freestanding characteristics of the bag and a transverse crease is formed along the fold line between the sidewalls of the bag and the bottom wall to enhance the bottom forming characteristics of the bag when it is snapped from a folded position to an opened position.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: July 2, 1985
    Assignee: Linear Films, Inc.
    Inventors: John E. Hummel, William E. Baab
  • Patent number: 4510732
    Abstract: A machine for the processing of packing containers of the type used for example for milk products. Such packing containers are manufactured from a filled material tube and are first given cushion-shape. With the help of the machine in accordance with the invention they are subsequently converted to a substantially parallelepipedic shape.The machine comprises a means of transport in the form of a wheel (35) having radial holding devices (37) for the cushion-shaped semi-finished products (2). The means of transport can be rotated step-by-step so that each individual packing container passes around processing stations (45-50) placed around the periphery of the means of transport for the folding of corner lugs, sealing and shaping.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: April 16, 1985
    Assignee: Tetra Pak International AB
    Inventor: Stig A. Lothman
  • Patent number: 4453370
    Abstract: Open mouth square ended bags are formed from a tube-like band and in a chain with the back wall and top end of each bag partially sealed together from each side wall to provide an open mouth therebetween. Each bag in turn may be filled through the mouth located between the back wall and top end, the bag expanding forwardly from the back wall by expanding gussets in the top and bottom ends.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: June 12, 1984
    Assignee: Basic Packaging Systems, Inc.
    Inventor: Oliver R. Titchenal
  • Patent number: 4406646
    Abstract: A method of producing a synthetic foil flat-bottom bag capable of receiving liquid, fluid or pourable material and capable of standing up-right when filled, in which a bag closed at the bottom and open at the top is spread apart at opposite sides whereby at its bottom, a bottom surface with two outwardly pointed triangular tips is formed. The two tips are compressed flat with their two-foil walls and are folded downwardly by approximately 180.degree. about a fold line laterally spaced from the bottom of the bag, while the tip ends are placed against the underside of the bottom wall. Thereafter the two tip folds are crease-welded. The thus produced bag has a supporting surface which is enlarged by the welded multi-layer folds and is stabilized, and tightly sealed by the crease welds in the area of the tip. The folding of the tip is preferably effected by means of a form plate which has two parallel form edges extending beyond the bottom surface of the bag.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: September 27, 1983
    Inventor: Hans G. Jentsch
  • Patent number: 4358466
    Abstract: A disposable or reusable and reclosable thermoplastic bag capable of being compactly stored as a food container in freezers, yet capable of standing with an upright spout in a microwave oven for non-spill thawing and cooking of food contained in the bag. The bag is formed of two wing-shaped pouches on either side of the upright spout. The preferred closure is a zipper type which can automatically vent upon softening of its thermoplastic structure during the cooking stage. The bag preferably has inner and outer skin layers of different heat-softening temperature responses so that peripheral sealing is effected only with the inner layers, allowing the wing-shaped pouches to be formed out of a gussetted bottom without sealing of the outer layer plies facing one another.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: November 9, 1982
    Assignee: The Dow Chemical Company
    Inventor: Fred Stevenson