US3913465A - Folding device for box making machines - Google Patents

Folding device for box making machines Download PDF

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Publication number
US3913465A
US3913465A US415322A US41532273A US3913465A US 3913465 A US3913465 A US 3913465A US 415322 A US415322 A US 415322A US 41532273 A US41532273 A US 41532273A US 3913465 A US3913465 A US 3913465A
Authority
US
United States
Prior art keywords
folding
head block
plunger
flap
box
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US415322A
Other languages
English (en)
Inventor
Jurgen Keck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr BELLMER KG MASCHINENFABRIK
Original Assignee
Gebr BELLMER KG MASCHINENFABRIK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19722256709 external-priority patent/DE2256709C3/de
Application filed by Gebr BELLMER KG MASCHINENFABRIK filed Critical Gebr BELLMER KG MASCHINENFABRIK
Application granted granted Critical
Publication of US3913465A publication Critical patent/US3913465A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/262—Folding sheets, blanks or webs involving folding, leading, or trailing flaps of blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
    • B31B50/46—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls

Definitions

  • the present invention relates to box making ma chines, and in particular to devices for the folding of box blanks of cardboard or other materials such as acrylic, cellophane, etc., into boxes.
  • box blanks of cardboard or other materials such as acrylic, cellophane, etc.
  • the invention suggests a folding device in which the folding means for the end flaps of the box engage the unfolded end flap at a distance from its vertical folding crease and fold it by moving in a direction which is inclined toward the plane of the side wall so as to produce a motion component against that plane.
  • the step of folding the end flaps is performed during a short rest phase or slow-motion phase of the head block motion.
  • FIG. 1 shows in a plan view a schematic arrangement of a folding device embodying the invention
  • FIG. 2 shows an enlarged detail of the bottom right hand corner of FIG. 1, featuring an inclined folding plunger
  • FIG. 3 shows the detail of FIG. 2 with the folding plunger in a different position
  • FIG. 4 shows in a perspective view a portion of the device of FIG. 1;
  • FIG. 5 shows the device of FIG. 4 during operation
  • FIG. 6 shows in an elevational view one of the four folding plungers with its drive
  • FIG. 7 shows the unit of FIG. 6 in a plan view.
  • FIG. 1 shows a folding device in. an intermediate operating position
  • FIGS. 2 and 3 show typical details of one of the four end flap folding units, including the movement of the folding plunger 16. Details of. the plunger itself and of its guide and drive means will be disclosed further below.
  • the direction of advance of the folding plungers 16 in their guides 17 is not at right angles to the end flaps 8 before folding, but is inclined to form an acute angle ,of approximately 60 to This inclined motionpath produces a motion component toward the vertical end plane of the head block 15. This makes it possible to avoid the previously necessary alignment of the near flank of the folding plunger with the bending line of the end flaps and to place the folding plungers 16 at a distance from the bending line.
  • the contact face of the folding plunger 16 with the end flap 8 is preferably rounded in accordance with the shifting of the contact line therebetween.
  • FIGS. 4 and 5 show details of the folding device, as they relate to the upper right hand corner of FIG. 1.
  • FIG. 4 shows one of the four guide columns 12, arranged preferably in a vertical direction.
  • a horizontal folding rail 14 Longitudinally outside the two right-hand guide columns 12 is arranged a horizontal folding rail 14.
  • This folding rial 14 is preferably L-shaped, being for example an angle iron, with the vertical leg of the angle iron abutting against one side of the vertical guide column 12.
  • the horizontal leg of the folding rail 14 thus extends longitudinally outwardly from the guide columns 12.
  • a plunger guide 17 preferably attached to the guide column 12 just above the horizontal face of folding railv 14 and supported by said rail.
  • the folding device is preferably so arranged that the vertical guide columns 12 can be moved longitudinally in relation to one another by means of adjustment spindles displacing them along the side walls 4 of the blank.
  • Other known adjustment means serve to obtain adjustment in the transverse direction between the respective pairs of guide columns 12 and the folding rails 12' for the box side walls.
  • the earlier-mentioned folding rails 14 must undergo an identical adjustment.
  • These rails may be either adjusted separately, or known transversely adjustable attachments may be provided between the rails and the adjacent faces of the guide columns 12. No adjustment is necessary for boxes of different height. Thus, only the head block 15 itself needs to be exchanged, when a different box size is to be produced, all other elements of the device being adaptable through the aforementioned adjustments.
  • the head block 15 is moved downwardly between the guide columns 12. This motion first causes the side walls 4 of the box blank '10 to be erected, as they are engaged by longitudinal folding rails (not shown) which are arranged above the guide columns 12. These erected side walls 4 then are maintained in their vertical position by the guide columns 12 which are accordingly spaced from the head block 15. Note that for an easier understanding of the illustration of FIGS. 4 and 5 the front side wall of the box blank and its end flap are cut away.
  • the vertical legs of the folding rails 14 are arranged at a slight incline so as to form a downwardly tapered guide against the erected end walls 6, thereby ironing the box.
  • the folded, assembled box can now be ejected downwardly from the folding station through an additional downward motion of the head block 15.
  • FIGS. 6 and 7 a typical flap folding unit with its guide and drive means, is illustrated in FIGS. 6 and 7.
  • the folding plunger 16 is longitudinally guided inside a plunger guide 17, the forward portion of which is open in the' manner of a U-shaped guide shown in FIG. 4.
  • the actuation of the folding plunger 16 is obtained by means of a rotary solenoid l8 engaging the rear end of plunger 16 over a crank 19, thereby assuring a very rapid advancing motion.
  • a similarly rapid return motion is obtained by means of a spring 21 which extends between a stationary pin and a similar pin attached to the plunger 16.
  • the housing of the rotary solenoid 18 may be directly attachedto the plunger guide 17 to provide a convenient assembly unit.
  • a device for the folding of box blanks into boxes which have a bottom wall, two longitudinal side walls with end flaps extending therefrom, and two end walls, the device comprising:
  • a vertically descending rectangular head block having a horizontal bottom and vertical sides corresponding to the inside dimensions of a finished box
  • stationary rail means for erecting the two sidewalls of a blank against the descending head block
  • each flap folding unit including a folding plunger advancing against an erected end flap in a generally horizontal reciprocating motion along a path directed obliquely against the end flap so as to have a motion component which is directed against the end face of the head block.
  • each flap folding unit includes a straight-line guide for the folding plunger and a solenoid-operated drive means with a return spring for advancing and retracting the folding plunger.
  • the orientation of the plunger guide is such that the angle included between a vertical plane through the plunger path and the erected, unfolded end flap v of the box is between 60 and 4.
  • transverse folding rails are L-shaped in profile with a generally vertical leg abutting against the v vertical guide columns and a horizontally extending leg extending longitudinally away from said columns. 5.
  • the lowest part of each folding plunger in that portion which moves over the unfolded end wall is vertically spaced from the horizontal leg of the transverse folding rail to allow for a certain descending motion of the head block and a-corresponding par-

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US415322A 1972-11-18 1973-11-13 Folding device for box making machines Expired - Lifetime US3913465A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722256709 DE2256709C3 (de) 1972-11-18 Umklapp-Einrichtung für Schachtel-Herstellungsautomaten

Publications (1)

Publication Number Publication Date
US3913465A true US3913465A (en) 1975-10-21

Family

ID=5862148

Family Applications (1)

Application Number Title Priority Date Filing Date
US415322A Expired - Lifetime US3913465A (en) 1972-11-18 1973-11-13 Folding device for box making machines

Country Status (4)

Country Link
US (1) US3913465A (it)
JP (1) JPS5337949Y2 (it)
FR (1) FR2207453A5 (it)
IT (1) IT988671B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070396A (en) * 1996-11-27 2000-06-06 Specialty Machinery, Inc. Carton folding apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US223406A (en) * 1880-01-06 Paper-box machine
US2600954A (en) * 1948-07-03 1952-06-17 Bardet Gerard Machine for the manufacture and delivery of parallelepipedal paperboard boxes
US2727444A (en) * 1950-04-01 1955-12-20 Package Machinery Co Container folding machine
US2925758A (en) * 1956-06-25 1960-02-23 Alium Sa Apparatus for forming cartons or containers
US3513757A (en) * 1967-07-14 1970-05-26 Owens Illinois Inc Manufacture of open-topped trays

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US223406A (en) * 1880-01-06 Paper-box machine
US2600954A (en) * 1948-07-03 1952-06-17 Bardet Gerard Machine for the manufacture and delivery of parallelepipedal paperboard boxes
US2727444A (en) * 1950-04-01 1955-12-20 Package Machinery Co Container folding machine
US2925758A (en) * 1956-06-25 1960-02-23 Alium Sa Apparatus for forming cartons or containers
US3513757A (en) * 1967-07-14 1970-05-26 Owens Illinois Inc Manufacture of open-topped trays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070396A (en) * 1996-11-27 2000-06-06 Specialty Machinery, Inc. Carton folding apparatus

Also Published As

Publication number Publication date
JPS5357022U (it) 1978-05-16
JPS5337949Y2 (it) 1978-09-13
DE2256709A1 (de) 1974-06-06
FR2207453A5 (it) 1974-06-14
IT988671B (it) 1975-04-30
DE2256709B2 (de) 1976-10-21

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