WO1988005384A1 - Method and apparatus for aligning lids in a packing machine - Google Patents

Method and apparatus for aligning lids in a packing machine Download PDF

Info

Publication number
WO1988005384A1
WO1988005384A1 PCT/SE1987/000011 SE8700011W WO8805384A1 WO 1988005384 A1 WO1988005384 A1 WO 1988005384A1 SE 8700011 W SE8700011 W SE 8700011W WO 8805384 A1 WO8805384 A1 WO 8805384A1
Authority
WO
WIPO (PCT)
Prior art keywords
package
lid
edge flap
wheels
edge
Prior art date
Application number
PCT/SE1987/000011
Other languages
French (fr)
Inventor
Robert Matzinger
Original Assignee
Sprinter System Ab
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 SE8600029A external-priority patent/SE451558B/en
Application filed by Sprinter System Ab filed Critical Sprinter System Ab
Priority to PCT/SE1987/000011 priority Critical patent/WO1988005384A1/en
Publication of WO1988005384A1 publication Critical patent/WO1988005384A1/en

Links

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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2807—Feeding closures
    • 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
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • 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
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0024—Making boxes having all side walls attached to the bottom
    • 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
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/10—Construction of rigid or semi-rigid containers provided with covers, e.g. lids
    • 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
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/50—Construction of rigid or semi-rigid containers covered or externally reinforced
    • 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
    • B31B50/004—Closing boxes
    • B31B50/0044—Closing boxes the boxes having their opening facing upwardly
    • 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
    • B31B50/006—Controlling; Regulating; Measuring; Improving safety
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/044—Feeding sheets or blanks involving aligning
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/10—Feeding or positioning webs
    • B31B50/104—Feeding or positioning webs involving aligning
    • 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
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings

Definitions

  • the present invention relates to a method and apparatus for aligning lids in a packing machine, through which packages such as carton trays are fed with their lids folded down, where the lid includes at least one edge flap which can be folded down against the outside of the package.
  • the object of the present invention is to provide a method and apparatus where the lid can be taken to its correct position above the opening of the package before the edge f lap of the l id is folded down and the pack age sealed.
  • this is achieved by measuring the time difference with the aid of photocells between the position for the edge flap and the pos ition of a front side edge of the package when these pass the light beams associated with the photocells.
  • the edge flap of the lid is fed through a roller nip formed by two lid aligning wheels. The lie is correctly aligned when the bottom of the package is in line with the lid, i.e. the lid is not d isplaced relative the bottom.
  • the edge flap of the lid When the edge flap of the lid is moved into the nip between the wheels, the relative positions of the lid and said front edge side are detected by the photocells and the signals from then, subsequently cause the rotational rate of the wheels to vary such that the wheels are accelerated or retarded for reorienting the lid to its correct position above the package opening.
  • Fig. 1 is a schematic side view of the lid aligning apparatus in accordance with a preferred embodiment of the present invention.
  • Fig. 2 is a schematic perspective view of a package, the lid of which is to be aligned, and where the lid is correctly aligned when it is in line with the front side edge of the package.
  • Fig. 3 is a schematic side view of the lid aligning wheels, illustrating how the edge flap of the lid is taken between the wheels and how their peripheral speed varies relative the advancing speed of the package through the machine, and
  • Fig. 4 illustrates how a lid aligning wheel can accelerate or retard to move the lid into the right position.
  • FIG. 1 A preferred embodiment of a lid aligning apparatus 1 in accordance with the present invention is illustrated in Fig. 1, the apparatus 1 being situated in a lid sealing machine through which packages 3 are advanced with the aid of a conveyor means 2, with the lids of the packages 3 being situated in a folded-down position over the opening of the package.
  • Each lid 4 on the packages 3 has at least one edge flap 6 which can be folded down against the outside 5 of the package 3, this flap being in the same plane as the lid 4 during the alignment of the lid before the flap is folded down and sealed against the outside 5.
  • the lid aligning apparatus 1 includes two lid aligning wheels 8 and 9, of which one or the other or both can be driven with the aid of a suitable drive means not illustrated on the drawing.
  • the lower wheel 9 is actuable by a drive means for selectable rotation of the wheel.
  • a nip 7 is formed between the wheels 8, 9 and the edge flap 6 of the lid 4 is taken throug h this nip as the package is advanced through the sealing machine.
  • Two photocells 10, 11 are also included in the apparatus 1 and are situated d irectly after the wheels 8, 9. The photocell 10 is assigned to the lid and the other photocell 11, to the bottom of the package.
  • the photocell 10 senses a forward edge 12 on the edge flap 6 of the lid 4 and the photocell 11 senses a forward side edge 13 on the package 3, and with the conveying speed of the package 3 through the sealing machine as a parimeter, a computer then calculates the time difference the lid and bottom pos it ions for signalling acceleration or retardation of the wheels 8, 9, to take the lid 4 to its correct position above the package opening.
  • a computer calculates the time difference the lid and bottom pos it ions for signalling acceleration or retardation of the wheels 8, 9, to take the lid 4 to its correct position above the package opening.
  • An error of 0-9 mm in the relationship between the lid 4 and the forward side edge 13 of the package 3 can be rectified in either direction over a distance of 60 mm for the wheels 8, 9.
  • the wheels 8, 9 have the same peripheral speed as the conveyor 2 for the packages 3, e.g. 1.6-1.7 m/s.
  • the edge flap 6, inter alia, is folded down after the package has passed through the lid al igning apparatus 1 and is sealed against the outside 5 of the package 3, whereupon the remaining flaps are folded down .
  • Fig. 2 there is illustrated a package 3, where the lid 4 is directly above the package opening when the lid 4 is in line with the front side edge. How the edge flap 6 of the lid 4 is fed through the nip 7 and how the photocells 10 and 11 are affected, the time difference, plus or minus being measured, is shown in Fig, 3.
  • the peripheral speed v 2 of the aligning wheel 9 is equal to the conveying speed v 1 of the package. With the conveying speed v 1 as a constant, and the time difference between edge 12 and side edge 13 as a parameter, a computer calculates the necessary peripheral speed increase/decrease of the wheel 9 to cancel out the time difference, i.e. to align edge 12 with side edge 13 and thereby to bring the lid 4 to the right position, as illustrated in Fig. 4.

Abstract

Method and apparatus for aligning a lid (4) into its correct position above a package (3) before sealing. This is achieved in accordance with the invention by two photocells (10, 11) which sense the relative position between the lid (4) and a front side edge of the package (3), signals from the photocells (10, 11) causing lid aligning wheels (8, 9) to take the lid (4) into its correct position above the package before sealing.

Description

METHOD AND APPARATUS FOR ALIGNING LIDS IN A PACKING MACHINE
The present invention relates to a method and apparatus for aligning lids in a packing machine, through which packages such as carton trays are fed with their lids folded down, where the lid includes at least one edge flap which can be folded down against the outside of the package.
The object of the present invention is to provide a method and apparatus where the lid can be taken to its correct position above the opening of the package before the edge f lap of the l id is folded down and the pack age sealed. In accordance with the invention this is achieved by measuring the time difference with the aid of photocells between the position for the edge flap and the pos ition of a front side edge of the package when these pass the light beams associated with the photocells. Directly upstream of the photocells, seen in the conveying direction of the package, the edge flap of the lid is fed through a roller nip formed by two lid aligning wheels. The lie is correctly aligned when the bottom of the package is in line with the lid, i.e. the lid is not d isplaced relative the bottom. When the edge flap of the lid is moved into the nip between the wheels, the relative positions of the lid and said front edge side are detected by the photocells and the signals from then, subsequently cause the rotational rate of the wheels to vary such that the wheels are accelerated or retarded for reorienting the lid to its correct position above the package opening.
The invention will now be described in nore detail below with reference to the accompanying drawing, where Fig. 1 is a schematic side view of the lid aligning apparatus in accordance with a preferred embodiment of the present invention.
Fig. 2 is a schematic perspective view of a package, the lid of which is to be aligned, and where the lid is correctly aligned when it is in line with the front side edge of the package.
Fig. 3 is a schematic side view of the lid aligning wheels, illustrating how the edge flap of the lid is taken between the wheels and how their peripheral speed varies relative the advancing speed of the package through the machine, and
Fig. 4 illustrates how a lid aligning wheel can accelerate or retard to move the lid into the right position.
A preferred embodiment of a lid aligning apparatus 1 in accordance with the present invention is illustrated in Fig. 1, the apparatus 1 being situated in a lid sealing machine through which packages 3 are advanced with the aid of a conveyor means 2, with the lids of the packages 3 being situated in a folded-down position over the opening of the package. Each lid 4 on the packages 3 has at least one edge flap 6 which can be folded down against the outside 5 of the package 3, this flap being in the same plane as the lid 4 during the alignment of the lid before the flap is folded down and sealed against the outside 5. The lid aligning apparatus 1 includes two lid aligning wheels 8 and 9, of which one or the other or both can be driven with the aid of a suitable drive means not illustrated on the drawing. In the present case, the lower wheel 9 is actuable by a drive means for selectable rotation of the wheel. A nip 7 is formed between the wheels 8, 9 and the edge flap 6 of the lid 4 is taken throug h this nip as the package is advanced through the sealing machine. Two photocells 10, 11 are also included in the apparatus 1 and are situated d irectly after the wheels 8, 9. The photocell 10 is assigned to the lid and the other photocell 11, to the bottom of the package. The photocell 10 senses a forward edge 12 on the edge flap 6 of the lid 4 and the photocell 11 senses a forward side edge 13 on the package 3, and with the conveying speed of the package 3 through the sealing machine as a parimeter, a computer then calculates the time difference the lid and bottom pos it ions for signalling acceleration or retardation of the wheels 8, 9, to take the lid 4 to its correct position above the package opening. The following will serve as an example: An error of 0-9 mm in the relationship between the lid 4 and the forward side edge 13 of the package 3 can be rectified in either direction over a distance of 60 mm for the wheels 8, 9. For correct alignment of the lid 4, the wheels 8, 9 have the same peripheral speed as the conveyor 2 for the packages 3, e.g. 1.6-1.7 m/s.
When the lid 4 is in its correct position above the package opening, the edge flap 6, inter alia, is folded down after the package has passed through the lid al igning apparatus 1 and is sealed against the outside 5 of the package 3, whereupon the remaining flaps are folded down .
In Fig. 2 there is illustrated a package 3, where the lid 4 is directly above the package opening when the lid 4 is in line with the front side edge. How the edge flap 6 of the lid 4 is fed through the nip 7 and how the photocells 10 and 11 are affected, the time difference, plus or minus being measured, is shown in Fig, 3. At the actual moment of insertion, the peripheral speed v2 of the aligning wheel 9 is equal to the conveying speed v1 of the package. With the conveying speed v1 as a constant, and the time difference between edge 12 and side edge 13 as a parameter, a computer calculates the necessary peripheral speed increase/decrease of the wheel 9 to cancel out the time difference, i.e. to align edge 12 with side edge 13 and thereby to bring the lid 4 to the right position, as illustrated in Fig. 4.

Claims

Claims
1. Method of aligning a lid folded down on a package such as a carton tray, where the lid includes at least one edge flap which can be folded down against the outside of the package, characterized in that the package is advanced by a conveyor means through a sealing machine with the lid folded down over the package opening and with the edge flap situated in the same plane as the lid, in that the lid is fed into a nip formed between at least two lid aligning wheels before the edge flap is folded down and sealed against the outs ide of the package, the speed of the wheels being affected by impulses from at least two photocells situated immed iately downstream of the wheels seen in the conveying direction of the package, the photocells sensing the position of the edge flap relative a front side edge of the package, the wheels being caused to rotate with a peripheral speed greater than the advancing speed of the package if the edge flap is in a position upstream of the bottom flange and slower than the advancing speed of the package if the edge flap is in a position downstream of the front side edge, for al igning the lid into its correct position.
2. Apparatus for aligning a lid (4) folded down on a package (3), where the lid includes at least one edge flap (6) which can be folded down against the outside
(5) of the package (3), the package (3) being advanced by a conveyo r means (2) through a sealing machine with the lid (4) folded down over the opening of the package
(3) and with the edge flap (6) of the lie situated in the same plane as the lid (4), characterized in that the apparatus comprises at least two lid aligning wheels (8, 9) forming a nip (7) for accelerating or retarding the edge flap (6) taken through the nip (7) during the advance of the package (3) through the sealing machine, and in that there are at least two photocells (10, 11) situated downstream of the wheels (8, 9) in the conveying direction, said photocells being adapted for sensing the position of the edge flap (6) relative a front side edge (13) of the package (3) situated nearest one forward edge (12) of the edge flap (6).
PCT/SE1987/000011 1986-01-03 1987-01-14 Method and apparatus for aligning lids in a packing machine WO1988005384A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE1987/000011 WO1988005384A1 (en) 1986-01-03 1987-01-14 Method and apparatus for aligning lids in a packing machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8600029A SE451558B (en) 1986-01-03 1986-01-03 Package cover positioning alignment guide
PCT/SE1987/000011 WO1988005384A1 (en) 1986-01-03 1987-01-14 Method and apparatus for aligning lids in a packing machine

Publications (1)

Publication Number Publication Date
WO1988005384A1 true WO1988005384A1 (en) 1988-07-28

Family

ID=26659199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000011 WO1988005384A1 (en) 1986-01-03 1987-01-14 Method and apparatus for aligning lids in a packing machine

Country Status (1)

Country Link
WO (1) WO1988005384A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817157A (en) * 1972-05-22 1974-06-18 Fmc Corp Sheet position detector
US4578052A (en) * 1981-11-27 1986-03-25 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Method and apparatus to determine folding deviations

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817157A (en) * 1972-05-22 1974-06-18 Fmc Corp Sheet position detector
US4578052A (en) * 1981-11-27 1986-03-25 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Method and apparatus to determine folding deviations

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