US3820691A - Improved outlet closure in a packaging machine - Google Patents

Improved outlet closure in a packaging machine Download PDF

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Publication number
US3820691A
US3820691A US00308590A US30859072A US3820691A US 3820691 A US3820691 A US 3820691A US 00308590 A US00308590 A US 00308590A US 30859072 A US30859072 A US 30859072A US 3820691 A US3820691 A US 3820691A
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US
United States
Prior art keywords
mandrel
filling
forming
sealing
slide
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
US00308590A
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English (en)
Inventor
W Saur
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.)
FR Hesser Maschinenfabrik AG
Original Assignee
FR Hesser Maschinenfabrik AG
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
Application filed by FR Hesser Maschinenfabrik AG filed Critical FR Hesser Maschinenfabrik AG
Application granted granted Critical
Publication of US3820691A publication Critical patent/US3820691A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/001—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers with flow cut-off means, e.g. valves

Definitions

  • the invention relates generally to packaging machines, specifically to so-called tubular bag machines.- of the type for forming, filling and sealing tubular packaging material with transverse seams, and particularly to a movable closure mechanism for controlling the flow of material through the forming mandrel of such machines.
  • a desirable feature of such packaging machines is a positive, leak-proof closure at the discharge end of the forming or filler mandrel to prevent a continuing trickle of the tiller material after the interval provided for filling.
  • a positive closure is not made, some of the filler material becomes welded into the trans verse seams as these are formed. Seams containing filler material not only fail to seal properly but alsolack the strength developed in clean, well made seams.
  • a closure mechanism is already known in which a closure flap is pivoted about a horizontal axis and fitted to the discharge end of a forming mandrel. The flap is actuated by a linkage means located within the forming mandrel.
  • a closure mechanism of this type must be relatively large to ensure reliable operation and to be wear resistant. This type of closure mechanism is suitable for use only with forming mandrels having correspondingly large cross section.
  • a metering device arranged within a hollow forming mandrel, in which a metering worm is rotatably disposed within a tube and a cone-like structure is adapted to be pressed against the outlet end of the tube to affect closure.
  • a disadvantage of this device is that the material delivered by the metering worm is sharply deflected by the cone upon leaving the tube and it then impinges on the interior of the forming mandrel. The flow of the material is impeded which reduces the output of the machine. Again, this closure mechanism must be relatively large if it is to operate reliably.
  • an aspect of the present invention resides in the provision of an apparatus which forms part of a packaging machine used for forming, filling and sealing tubular packaging material. More particularly, the apparatus includes a hollow mandrel for receiving packaging and filler material and is provided with two parallel spaced internal guides extending in a curved direction and a controllable closure mechanism effective to prevent, selectively, flow of filler material out of said mandrel.
  • the mechanism includes a movable closure slide of flexible material displaceably mounted within the mandrel in or between the guides to pemiit orientation of the slide, in response to movement thereof. either in a position parallel to the material flow direction or a position substantially transverse to the flow path.
  • the field of curvature established by the slide in closing position is inverse or in opposite direction to the end opening of the mandrel.
  • the closure device according to the present invention does not require costly or cumbersome bearing pins which can be prematurely worn by the entry of filler. material. Since the stiffness of the closure slide is determined by the type and thickness of the material of which it is made, the guide may be curved sharply. Thus, the closure device may be incorporated without difficulty into forming mandrels of small cross section.
  • FIG. 1 is a longitudinal cross sectional view, of the outlet end of a packaging machine, taken along line I--I of FIG. 2;
  • FIG. 2 is a cross sectional view of the outlet end showing the metering tube and forming mandrel.
  • the machine includes a material flow metering device 14 and a closure member 1 for controlling the opening of the metering device.
  • the closure member l is arranged within a hollow tube of rectangular cross section forming a mandrel 3 and adjacent to an outlet end 2.
  • the closure member 1 is comprised of a flexible metallic or plastic slide 4, such as a metal strip, mounted for sliding movement in two parallel guide grooves 8, 9 formed into opposing inner surfaces 6, 7 of the mandrel 3.
  • the metering device 14 is enclosed by mandrel 3 and comprises a metering worm 16 mounted for rotation in structural means comprising a metering tube 15.
  • the grooves 8, 9 are arranged to guide the slide 4 from an open position essentially parallel and adjacent to an inner surface 10 of the mandrel 3 in a curved path across the output end of the tube 15 to a closed position with a lower end 13 of the slide bearing against an inner surface 11 of the mandrel 3.
  • the slide 4 has attached to its upper end 12 an actuating linkage 5 connected to a drive mechanism, not shown.
  • the slide 4 is moved in the grooves 8, 9 by the actuating linkage 5 to a closed position with the lower end 13 of the slide 4 pressing against the inner surface 11 of the mandrel 3 thus closing off the metering tube 15 and preventing flow of filler material.
  • the metering tube 15 is opened and the filler material, not shown, is metered out by the rotating worm 16.
  • the slide 4, according to the invention, may also be used without a metering device arranged in mandrel 3.
  • the guide grooves 8, 9 may also be provided by securing in the mandrel 3 two pairs of guides plates, not
  • Friction between the slide 4 and the grooves 8, 9 may be minimized by pre-bending the slide 4, over at least part of its length. to match the curvature of the grooves 8, 9.
  • an improved mechanism for controlling flow of material during a filling operation comprising a hollow mandrel for receiving packaging and filler material and provided with two parallel spaced internal guides extending in a curved direction with the field of curvature being inverse to the end opening of the mandrel; controllable closure mechanism effective to prevent, selectively, flow of filler material out of said mandrel, said mechanism comprising a movable closure slide of flexible material displaceably mounted within said mandrel abutting said guides to permit orientation of the slide, in response to movement thereof, either in a position parallel to the material flow direction or a position substantially transverse to the flow path; structural means within said mandrel cooperating with said slide for selectively controlling the flow of material out of said mandrel; and
  • a packaging machine for forming, filling and sealing of tubular packaging material according to claim 1, wherein said structural means include a metering tube within said mandrel having a terminal end adjacent to said guides whose curvature is substantially parallel with or complementary to said slide when the latter is in the transverse position; said closure mechanism being arranged directly adjacent to said terminal end of said metering tube.
  • said metering tube includes a metering worm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
US00308590A 1971-11-26 1972-11-21 Improved outlet closure in a packaging machine Expired - Lifetime US3820691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2158599A DE2158599A1 (de) 1971-11-26 1971-11-26 Schlauchbeutelmaschine

Publications (1)

Publication Number Publication Date
US3820691A true US3820691A (en) 1974-06-28

Family

ID=5826171

Family Applications (1)

Application Number Title Priority Date Filing Date
US00308590A Expired - Lifetime US3820691A (en) 1971-11-26 1972-11-21 Improved outlet closure in a packaging machine

Country Status (6)

Country Link
US (1) US3820691A (enrdf_load_stackoverflow)
CH (1) CH538386A (enrdf_load_stackoverflow)
DE (1) DE2158599A1 (enrdf_load_stackoverflow)
FR (1) FR2163052A5 (enrdf_load_stackoverflow)
GB (1) GB1360756A (enrdf_load_stackoverflow)
IT (1) IT970135B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879917A (en) * 1973-01-10 1975-04-29 Fmc Corp Method and apparatus for packaging particulate material
US3916845A (en) * 1974-05-31 1975-11-04 Gen Motors Corp Internal combustion rotary engine
US5014493A (en) * 1988-06-08 1991-05-14 Bemis Company, Inc. Form-fill-seal packaging
US5548947A (en) * 1993-07-08 1996-08-27 Thomas J. Lipton Co. Apparatus and method for producing packets
US6530403B2 (en) * 2001-01-29 2003-03-11 James R. McGregor Fill tube control apparatus
US20190016484A1 (en) * 2017-07-12 2019-01-17 Vanrx Pharmasystems Inc. Purgeable pharmaceutical fill needle
US20190135460A1 (en) * 2016-04-07 2019-05-09 Rovema Gmba Dispensing device for arrangement in the format tube of a tubular bag machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803230C1 (enrdf_load_stackoverflow) * 1988-02-04 1989-03-16 Benz & Hilgers Gmbh, 4000 Duesseldorf, De
DE19504240C1 (de) * 1995-02-09 1996-04-11 Bosch Gmbh Robert Dosier- und Abfüllvorrichtung für pulveriges oder körniges Füllgut
DE102004031593B4 (de) * 2004-06-30 2018-06-28 Robert Bosch Gmbh Dosiervorrichtung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879917A (en) * 1973-01-10 1975-04-29 Fmc Corp Method and apparatus for packaging particulate material
US3916845A (en) * 1974-05-31 1975-11-04 Gen Motors Corp Internal combustion rotary engine
US5014493A (en) * 1988-06-08 1991-05-14 Bemis Company, Inc. Form-fill-seal packaging
US5548947A (en) * 1993-07-08 1996-08-27 Thomas J. Lipton Co. Apparatus and method for producing packets
US6530403B2 (en) * 2001-01-29 2003-03-11 James R. McGregor Fill tube control apparatus
US20190135460A1 (en) * 2016-04-07 2019-05-09 Rovema Gmba Dispensing device for arrangement in the format tube of a tubular bag machine
US10913555B2 (en) * 2016-04-07 2021-02-09 Rovema Gmbh Dispensing device for arrangement in the format tube of a tubular bag machine
US20190016484A1 (en) * 2017-07-12 2019-01-17 Vanrx Pharmasystems Inc. Purgeable pharmaceutical fill needle
US11014696B2 (en) * 2017-07-12 2021-05-25 Vanrx Pharmasystems Inc. Purgeable pharmaceutical fill needle

Also Published As

Publication number Publication date
FR2163052A5 (enrdf_load_stackoverflow) 1973-07-20
GB1360756A (en) 1974-07-24
CH538386A (de) 1973-06-30
DE2158599A1 (de) 1973-05-30
IT970135B (it) 1974-04-10

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