US3669805A - Device for folding onto,and joining with,one another two side edge portions of a heat sealing foil - Google Patents

Device for folding onto,and joining with,one another two side edge portions of a heat sealing foil Download PDF

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Publication number
US3669805A
US3669805A US877920A US3669805DA US3669805A US 3669805 A US3669805 A US 3669805A US 877920 A US877920 A US 877920A US 3669805D A US3669805D A US 3669805DA US 3669805 A US3669805 A US 3669805A
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United States
Prior art keywords
folding
side edge
foil
edge portions
another
Prior art date
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Expired - Lifetime
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US877920A
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English (en)
Inventor
Sverre Engvoll
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Arenco AB
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Arenco AB
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B49/00—Devices for folding or bending wrappers around contents
    • B65B49/12—Rotary folders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
    • Y10T156/1771—Turret or rotary drum-type conveyor

Definitions

  • This invention relates to a device for folding onto, and uniting with, one another two side edge portions of a heat sealing foil, which is applied around three plane side walls coherent with one another through mutually parallel edges of a parallelepipedon-shaped package in such a manner that the two side edge portions project from two opposite edges of the fourth side wall of the package annexed to said three walls, said device including a first folding member movable over the surface of the fourth side wall to fold a first of said edge portions onto said side wall and a second folding member movable over the surface of said fourth side wall to fold the second side edge portion onto the first already downwardly folded side edge portion, said second folding member being in cooperation with heat supply means.
  • the folding members usually consist of two rail or bar shaped implements, which are brought to operation the one after the other in order to fold the two side edge portions of the foil projecting from the fourth side wall downwardly onto said side wall surface and to retain said side edge portions in an overlapping position relative one another.
  • a hot sealing implement is pressed against that area of the foil where the side edge portions overlap one another.
  • the foil may consist of any type of fusible plastic material and may, for example, consist of a wrapping foil on a cigarette, a chocolade-box or the like. Irrespective of the type of package which is provided with a foil, for example an entirely transparent one, the package will be denoted packet in the following description.
  • a drawback inherent to known devices of the type in consideration consists firstly in the difficulty of bringing about a good sealing in spite of the little space accessible for the sealing implement between the folding means when these retain the side edge portions pressed against the side wall surface and secondly the fact that the necessity of operating three members in sequence considerably limits the capacity of the machine.
  • One main object of the invention is to provide a simple device which permits reliable sealing of the wrapping foil and which is capable of being operated substantially more rapidly than known devices due to the fact that the number of members displaceable relatively to one another has been reduced to two.
  • FIG. 1 shows a detail of a packing machine having a turrethead for packets of which one packet has been advanced to the folding device
  • FIG. 2 shows the machine of FIG. 1 upon completion of the folding down of the first side edge portion of the foil
  • FIG. 3 shows the machine of FIG. 1 with the second side edge portion also folded downwardly
  • FIG. 4 is a highly simplified representation illustrating the step of folding down the first side edge portion
  • FIG. 5 illustrates the step of folding down the second side edge portion
  • FIG. 6 shows the positions of the two folding members upon completed folding down and sealing operations.
  • FIGS. 1 to 3 show diagrammatically a folding station forming part of a packing machine.
  • Finished packets 1 are advanced in the direction of the arrow A by means of members not shown towards a foil or thin sheet 6, which at the outset stands vertically and which during the advancing movement of the packet is applied around three coherent sides of packet 1 with two backwards directed side edge portions 3 and 4 projecting from opposite edges of the fourth annexed side wall.
  • the packet 1 with the foil 2 applied thereonto is guided into a retainer 5 on a turrethead 6 equipped with a plurality of retainers 5, which turrethead is revolved in the direction of the arrow B by a mechanism (not shown) in such a manner that the positions IV indicated in FIG.
  • each packet 1 fed into and carried by the turrethead is successively reached by each packet 1 fed into and carried by the turrethead.
  • a folding station constructed according to the invention is met by the packet 1, between the positions III and IV a first stationary wiper 7, in the position IV another movable wiper 8, between the positions IV and V a third stationary wiper 9, and in the position V the packet 1 provided with the foil sealed wrapping is discharged from the turrethead 6 and conveyed further in the direction of the arrow C.
  • the device shown in the drawings does not accomplish more than a folding of the side edge portions 3 and 4 towards one another and a sealing of the portions resting the one upon the other in such a manner that a sleeve of thin sheet wrapping material is formed around the packet 1. If a folding together of the end portions is to be acgomplished, other folding stations must of course be provi ed.
  • the folding device comprises a conventional folding member 10 having the form of a rod or rail with an active edge 11, which edge 11 (FIG. 4) extends along that entire or substantially entire side wall surface 12 of the packet 1 against which the side edge portions 3 and 4 of the foil shall be folded down.
  • the rail 10 is rigidly secured to a holder member having one or several arms 22.
  • the arm 22 is adjustably mounted on a swinging arm 13 which is fixed onto a shaft 14 which by means not shown here is rotated from a main shaft which also drives the turrethead 6 so that timed movements which will be described later, are produced.
  • Mounted on a shaft 15 suitably coaxial with the shaft 14 is another swinging arm 16, which on its free end carries a freely rotatable roll 17.
  • the shaft 15 is driven (turned) through a mechanism not shown from the main shaft of the machine so that additional timed movements which will be described later, are produced.
  • the roll 17 consists suitably of some heat-resistant plastic material such as Teflon (polytetrafluoroethylene) or of some metal coated with plastic material or some other suitable material.
  • the roll 17 is mounted on a shaft 18.
  • an electric heating element 19 to which current is supplied from a voltage source not shown is located between the roll 17 and the shaft 18 to heat the roll 17 to such a temperature that two foil portions pressed against one another are brought into at least a sticky state so that they adhere to one another and a reliable joint is obtained.
  • the heating element can be provided in a plurality of different manners such as, for example, molded into the roll 17, positioned in a central bore in the shaft 18, consisting of a passage for steam through the shaft etc.
  • the essential features are that sufiicient heat is supplied to the entire outer wall surface of the roll so that a sealing effect is produced and the roll is freely rotatable about the shaft 18 with as low friction as possible.
  • the element 19 extends in the same manner as the roll 17 along the upper side wall surface 12 of the packet 1.
  • FIG. 1 shows one packet 1 advanced to position III.
  • the folding rail 10 has been kept in the position shown in FIG. 3 and thus in FIG. 1 the downward folding of the side edge portion 3 has just been commenced by the rail edge 11 (FIG. 4) having reached the upper left-hand edge of the packet 1.
  • the side edge portion 3 is folded downwardly towards the packet side 12 as is shown in FIGS. 2 and 5.
  • the arm 16 is turned clockwise together with the hot roll 17 and begins to fold the side edge portion 4 of the foil downwardly as soon as the edge portion '3 has been bent downwardly sufficiently to be positioned safely below the edge portion 4.
  • the whole wrapping operation is performed within 0.1 second or less which in turn results in a very favorable effect in the most critical point, namely the downward folding step effected by the heated roll 17.
  • the side edge portion 4 due to the rapid turning of the turrethead and the air resistance will be positioned from the outset bent to a curve over the side wall surface 12. In this way the risk is eliminated that damage by heat be produced on the foil edge portion 4, as the roll 17 will initially reach the foil at the left-hand side edge of the surface 12 as shown in FIG. 4, at which place a rapid rolling is started. If'the foil edge portion 4 had take the position indicated in FIG. 4, by dashed lines, the roll 17 would have made its first contact with the foil approximately half-way between the upper and the lower edges thereof and thus affect the intermediate area so long a time that damages by heat could be produced.
  • the foil edge portion 3 will also be blown in left hand direction according to FIG. 4, which, however, is of no importance since the rail 10 is cold and thus does not affect the material of the foil.
  • the surface 12 travels below the stationary wiper 7, which here is shown to have a freely rotatable roll 20, and in the position IV a further wiping of the seal joint is effected by means of the movable wiper 8, which preferably is provided with a freely rotatable roll 21.
  • the relative position of said wiper 8 during different time periods are evident from FIGS. 1 to 3.
  • a further wiper 9 with freely rotatable roll which is of the same type as the wiper 7 affects each packet during the displacement thereof between the stations IV and stations V. All said Wipers have for their purpose to compress the Welded joint produced at the folding station so that a perfect seal is obtained, and at the same time to conduct away heat from the joint so that the same is stabilized.
  • An apparatus for folding and joining together two opposing flaps of a heat scalable foil wrapped around three of the four side walls of a parallelepiped-shaped package in such a manner that the two fiaps project from opposite edges of the fourth side wall of the package including a rotatable turrethead means having holder members for rotating packages through an arc during which a sealing action is eifectuated comprising:
  • first folding member is pivotably mounted, and further comprising means for rotating said folding member into inoperative position as soon as the roller has commenced the downward folding of the second flap.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
US877920A 1968-11-22 1969-11-19 Device for folding onto,and joining with,one another two side edge portions of a heat sealing foil Expired - Lifetime US3669805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15971/68A SE335499B (enrdf_load_stackoverflow) 1968-11-22 1968-11-22

Publications (1)

Publication Number Publication Date
US3669805A true US3669805A (en) 1972-06-13

Family

ID=20301514

Family Applications (1)

Application Number Title Priority Date Filing Date
US877920A Expired - Lifetime US3669805A (en) 1968-11-22 1969-11-19 Device for folding onto,and joining with,one another two side edge portions of a heat sealing foil

Country Status (5)

Country Link
US (1) US3669805A (enrdf_load_stackoverflow)
DE (2) DE1958172A1 (enrdf_load_stackoverflow)
FR (1) FR2023930A1 (enrdf_load_stackoverflow)
GB (1) GB1239108A (enrdf_load_stackoverflow)
SE (1) SE335499B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123311A (en) * 1975-01-23 1978-10-31 Mac Engineering & Equipment Company, Inc. Machine for wrapping battery plates
US4762587A (en) * 1985-07-31 1988-08-09 R. J. Reynolds Tobacco Company Universal tax stamping assembly
US5657855A (en) * 1993-06-23 1997-08-19 The Meyercord Co. Indicia applicator for cigarette packages
US5885405A (en) * 1997-08-13 1999-03-23 Crathern Engineering Co., Inc. Apparatus for and method of wrapping boards

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1246840B (it) * 1990-07-17 1994-11-28 Gd Spa Macchina incartatrice di elementi scatolari sostanzialmente parallelepipedi.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123311A (en) * 1975-01-23 1978-10-31 Mac Engineering & Equipment Company, Inc. Machine for wrapping battery plates
US4762587A (en) * 1985-07-31 1988-08-09 R. J. Reynolds Tobacco Company Universal tax stamping assembly
US5657855A (en) * 1993-06-23 1997-08-19 The Meyercord Co. Indicia applicator for cigarette packages
US5885405A (en) * 1997-08-13 1999-03-23 Crathern Engineering Co., Inc. Apparatus for and method of wrapping boards

Also Published As

Publication number Publication date
SE335499B (enrdf_load_stackoverflow) 1971-05-24
DE1958172A1 (de) 1970-07-30
DE6944950U (de) 1970-03-19
FR2023930A1 (enrdf_load_stackoverflow) 1970-08-21
GB1239108A (enrdf_load_stackoverflow) 1971-07-14

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