US3583296A - Bag making machine - Google Patents

Bag making machine Download PDF

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Publication number
US3583296A
US3583296A US825900A US3583296DA US3583296A US 3583296 A US3583296 A US 3583296A US 825900 A US825900 A US 825900A US 3583296D A US3583296D A US 3583296DA US 3583296 A US3583296 A US 3583296A
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United States
Prior art keywords
sensors
oblique
oblique edges
diverter
edge
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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
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US825900A
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English (en)
Inventor
Willi Stork
Werner Schmalstieg
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Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

Definitions

  • the checking means comprises a single row of sensors for checking the presence of oblique edges of inwardly folded comer portions of the endclosures and any deviation in the position of the oblique edges from a predetermined desired position. Only one row of stationary oblique-edge sensors is provided to sense the actual positions of the leading; as-- well as the trailing oblique edges so that as a bag is being moved along the conveying path, first the leading oblique edges and then the trailing oblique edges come within the sensing range of the oblique-edge sensors, with means being provided to store fault impulses from the oblique-edge sensors and to transmit all fault impulses for any one bag simultaneously to actuating means for the diverter.
  • l8, I970 which concerns a machine for making bags having cross-bottom end-closures, comprising an end-closure laying station, a delivery station and, disposed between them, a diverter which is controlled by end-closure checking means and is effective to reject faulty bags from a conveying path between the stations, the checking means comprising a single row of sensors for checking the presence of oblique edges of inwardly folded corner portions of the end closures and any deviation in the position of said oblique edges from a predetermined desired position.
  • the said checking means in the prior application comprise two rows of sensors with four sensors in each row, the overall arrangement of the rows and sensors in the conveying path being such that each of the eight oblique edges of the corner portions of a bag comes within the sensing range of a respective one of the sensors and all eight oblique edges are checked simultaneously.
  • the present invention aims to provide a considerably simplified system.
  • oblique-edge sensors only one row of stationary sensors (hereinafter referred to as oblique-edge sensors") is provided to sense the actual positions of the leading as well as the trailing oblique edges so that, as a bag is being moved along the conveying path, first the leading oblique edges and then the trailing oblique edges come within the sensing range of the oblique-edge sensors with means being provided to store fault impulses from the oblique-edge sensors and to transmit all fault impulses for any one bag simultaneously to actuating means for the diverter.
  • Preferred means for storing the fault impulses and transmitting them together comprise electronic operating members or a relay with a holding device and a cam wheel revolving in phase with the machine and a stored fault impulse or impulses being transmitted at a predetermined time to the actuating means for the diverter, by closing a switch in the circuit of the relay or electronic operating members.
  • the stored impulses can be erased by a second cam wheel or timing disc after each bag has been checked.
  • timing means in the form of a timing disc which revolves in synchronism with the machine. It turns on and off a switch provided in the circuit for transmitting fault impulses to the diverter.
  • this timing disc can comprise first and second switching cams arranged on its periphery such that the first cam opens the switch shortly before the leading oblique edges, if they are correctly formed, reach the oblique-edge sensors, while the second cam closes the switch shortly after the trailing oblique edges, if they are correctly formed, have passed the said sensors.
  • the relative angular position of the two switching cams can be adjustable to allow for bags of different sizes.
  • the oblique-edge sensors are therefore preferably connected to the diverter-actuating circuit in dependence on the arrival of the leading and trailing longitudinal edges of the bag at the end-closure checking unit, in order to blank out the times when correctly formed oblique edges are passing through.
  • two further stationary sensors hereinafter referred to as control sensors" may be provided substantially in the transverse medial plane of the bag.
  • the control sensors are symmetrical to the row of oblique-edge sensors and are spaced apart a distance such that one of them (influenced by the leading longitudinal edge of the bag) opens a first switch in the circuit transmitting the fault impulses to the diverter shortly before the correctly formed leading oblique edges arrive at the oblique-edge sensors, while the other control sensor (influenced by the trailing longitudinal edge of the bag) closes a second switch shortly after the correctly formed trailing oblique edges have passed the oblique-edge sensors.
  • the two control sensors are preferably adjustable in the direction of travel of the bag workpieces. This makes it possible for their switching impulses to be adapted to the various widths of the end closures of the bags and also for the tolerance range to be set within which they transmit the fault impulses detected by the oblique-edge sensors to the diverter actuating circuit.
  • the sensors used are preferably photoelectric detectors.
  • the row of oblique-edge sensors open their associated switches in the diverter actuating circuit in response to a luminous signal and close them in response to a dark signal, while the control sensors close their associated switches in the said circuit in response to a luminous signal and open them in response to a dark signal.
  • FIG. 1 is a diagrammatic plan view of the checking and rejecting apparatus of a bagmaking machine showing a workpiece being checked at the leading oblique edges of the inwardly folded comer portions.
  • FIG. 2 illustrates the position assumed by the workpiece of FIG. 1 when the trailing oblique edges of the inwardly folded corner portions are being checked
  • FIG. 3 is a circuit diagram of the FIG. 1 checking and rejecting apparatus.
  • the workpieces 5 for the bags that are being produced (only one workpiece is shown in FIGS. 1 and 2) are conveyed by means of lower rollers 6 which are located below the conveying plane and which are associated with upper rollers (not shown). These pairs of rollers guide the workpieces, in the direction of the arrow 8, past a checking unit 2 and into the vicinity of rejecting means comprising a diverter 25 for deflecting faulty workpieces out of the conveying path defined by the pairs of rollers 6.
  • the checking unit 2 is used to check the leading and trailing oblique edges 200-207 of the inwardly folded corner portions at the two cross-bottom closures 9 and 10 of the workpieces and to ascertain any errors in the positioning of these oblique edges.
  • the checking unit comprises four sensors 208-211 for sensing the oblique edges 200-207 of the corner portions and two control sensors 212, 213 for sensing the longitudinal edges 169, 169.
  • the oblique-edge sensors are arranged in a row R-R at right angles to the direction 8 of travel of the workpiece 5, which is advanced transversely.
  • the leading oblique edges 200-203 first arrive at their respective sensors 208-211.
  • the trailing oblique edges 204-207 arrive at the same sensors as the workpiece is advanced (FIG. 2).
  • the control sensors 212, 213 are arranged substantially in the transverse medial plane E-E of the workpiece and symmetrically in relation to the row R-R of obliqueedge sensors 208-211.
  • the distance x between the control sensors 212, 213 is large enough to allow the front sensor 212 (as viewed in the conveying direction) to be influenced by the leading longitudinal edge 169 shortly before the leading oblique edges 200-203 come, if they are correctly formed, within sensing range of the oblique-edge sensors, and to allow the rear control sensor 213 to be influenced by the trailing longitudinal edge 169 shortly after the correctly formed trailing oblique edges 204-207 have left the sensing range of the oblique-edge sensors.
  • the oblique-edge sensors 2082l1 are fixed but slidably adjustable on a beam 214 attached to longitudinal walls 44, 45 of the machine frame. The fact that the sensors can be ad justed enables them to be accurately set to the various bag sizes that are encountered or, more precisely, to the various widths of the end closures.
  • the control sensors 212, 213 are fixed but adjustable on a supporting member 215 attached to the longitudinal wall. By altering the spacing x between them, the control sensors may be set to the bag sizes in question and to the tolerance range within which the actual positions of the oblique edges are allowed to differ from a predetermined position. An increase in the spacing x results in a reduction in tolerance and a decrease in an increase in tolerance.
  • the oblique-edge sensors 208, 209 or 210, 211 for each end closure of the workpiece may be displaced symmetrically to the center line of the closure in question by spindles with leftand right-hand screw threads with the aid ofa scale calibrated to the widths of the end closures.
  • the mounting for either the right-hand or left-hand threaded spindle is moved together with half of the machine. Since the distance between the longitudinal edges of the workpiece and the roots of the adjacent oblique edges is always equal to half the width of the end closure, the control sensors 212 and 213 may also be adjustable by spindles with rightand left-hand screw threads with the aid ofa scale calibrated to the widths of the end closures.
  • the overall arrangement of the sensors 208213 corresponds to the predetermined desired position of the oblique edges of the inwardly folded corner portions.
  • the function of the sensors is to ascertain any deviations of the actual positions of the oblique edges from their desired positions and to reject faulty workpieces by actuating the diverter 25 and causing them to be deflected out of the conveyor path.
  • the sensors 208213 are preferably photodetectors.
  • the sensors 208, 211,212 and 213 comprise a light source 26 on one side of the conveying plane 170 of the workpieces 5, a receiver 27 (photoelectric cell) on the other side, and an amplifier 28,28 (photoelectric cell amplifier).
  • the light beam is interrupted and restored by the passage of successive workpieces.
  • This principle is not applicable to the sensors 209 and 210 which sense the inner oblique edges 201, 202, 205 and 206, since these edges lie on the wall of the workpiece, i.e., they lie within the confines of the workpiece and do not coincide with its outline contour.
  • the sensors 209, 210 are therefore in the form of reflection photodetectors receiving a light beamthat is reflected from a stationary specular reflection plate 216 which, as the workpiece is advanced, passes under the inner fold of the respective end closure.
  • the sensors 208, 211,212, and 213 may also advantageously employ reflection detectors.
  • the amplifiers 28 of the oblique-edge sensors 2082l1 cause the respective switches 2l7--220 to close when the light beam is interrupted by the workpiece (dark signal) and to open in the presence of a luminous signal.
  • the amplifiers 28 of the control sensors 212, 213 cause the respective switches 221, 222 to open in response to a dark signal and close in response to a luminous signal.
  • the switches 217-220 are connected in parallel to the energizing circuit of a relay 57, while the switches 221, 222 are connected in parallel with one another and in series with the switches 217-220. Thus, each of the switches 217-220 is able to energize the relay 57 provided that at least one of the switches 221, 222 is closed.
  • the relay 57 has an operating contact 58 and a holding contact 59.
  • the contact 58 is in the circuit of a solenoid 60, in series with a release switch 53 which is closed briefly once per cycle of the machine by means of a cam wheel 67 that turns in phase with the machine.
  • the solenoid 60 forms part of actuating means (not shown in further detail), for the diverter 25 which the solenoid releases by means of a check lever 61 as soon as a faulty workpiece has to be deflected out of the conveying path.
  • a switch 63 is provided in the holding circuit of the relay 57 in series with the holding contact 59.
  • the switch 63 is briefly opened by a cam wheel 64 once during each cycle of the machine, shortly after the cam wheel 67 has closed the switch 53.
  • the trailing oblique edges 204-207 first restore the luminous signals from the sensors 2082l1 to open the associated switches 217-220 and terminate the current supply to the relay 57.
  • the rear longitudinal edge 169' restores the luminous signal from the control sensor 213 and, after a distance x, from the control sensor 212 to cause the associated switches 221, 222 to close, but his has no effect on the relay 57 because the switches 217-220 are already open.
  • the diverter 25 therefore remains in an inoperative position where it keeps the workpieces on the conveyor so that the workpieces approved by the checking unit 2 are sent on to the store.
  • the workpiece has faults at the oblique edges 201 and 207, the faults having been caused by the preceding end-closure-forming station of the bagmakirig machine and resulting in the said oblique edges projecting beyond their normal position, as indicated in dotted lines atF in FIG. 2.
  • the faulty projecting edge 201 at the leading side of the bag enters the light beam of the sensor 209 before the leading side edge 169 of the workpiece has entered the beam of the sensor 212 and thus before the latter has been able to open its associated switch 221.
  • the switch 218 therefore closes the energizing circuit of the relay 57, with the result that the latter closes its operating contact 58 and holding contact 59.
  • thefault signal from the sensor 209 is not yet passed on to the solenoid 60, but is stored by the holding contact 59 until the switch 53 in the circuit of the relay 57 is also closed by the cam wheel 67.
  • the cam wheel 67 briefly closes the switch 53 once per cycle of the machine.
  • the cam is fixed to its drive shaft such that the switch 53 is closed shortly after the trailing oblique edges 204-207 have passed through the checking unit 2.
  • the fault signal from the sensor 209 caused by the faulty oblique edge 201 is thus stored by the combined operation of the holding contact 59 and the cam wheel 67, until the trailing oblique edges 204-207 have also passed through the checking unit 2.
  • the light beam from the control sensor 213 is restored by the trailing longitudinal edge 169 of the bag, before the beam from the sensor 211 is restored by the faulty oblique edge 207.
  • the switch 222 is therefore closed before the switch 220 is opened, with the result that the energizing circuit of the relay 57 is closed.
  • the relay since the relay has already gone over to a holding position in response to the fault signal from the sensor 209 caused by the faulty edge 201, the relay remains in its operative position. If there had been no previous fault signal, the fault signal produced by the faulty edge 207 would make the relay 57 respond.
  • the cam wheel 67 closes the switch 53, and thus the operating circuit of the relay 57, and the solenoid 60 pulls the check lever 61 so that the actuating mechanism for the diverter 25 is operated to reject the faulty bag from the conveying path.
  • the cam wheel 64 opens the switch 63 and terminates the holding action ofthe relay 57, so that the relay is ready to pick up another fault signal front a succeeding workpiece. If a workpiece happens to lie crooked, one of its corners will project beyond the predetermined position and, as is desired, the appropriate oblique-edge sensor will cause rejection of the crooked bag.
  • each illustrated workpiece 5 can eventually form two bags by being slit along the transverse medial line E.
  • a machine for making bags having cross-bottom end closures comprising an end-closure laying station, a delivery station and, disposed between them, a diverter which is controlled by end-closure checking means and is effective to reject faulty bags from a conveying path between the stations, the checking means comprising a single row of sensors for checking the presence of oblique edges of inwardly folded comer portions of the end closures and any deviation in the position of said oblique edges from a predetermined desired position, wherein only one row of stationary oblique-edge sensors is provided to sense the actual positions of the leading as well as the trailing oblique edges so that, as a bag is being moved along the conveying path, first the leading oblique edges and then the trailing oblique edges come within the sensing range of said oblique-edge sensors.
  • means being provided to store fault impulses from the oblique-edge sensors and to transmit all fault impulses for any one bag simultaneously to actuating means for the diverter.
  • timing means operating in synchronism with the machine for opening and closing a circuit that transmits the fault impulses to the diverter, wherein the timing means comprise first and second switching cams arranged so that the first cam opens a switch in the circuit shortly before the leading oblique edges, if they are correctly formed, arrive at the oblique-edge sensors, while the second cam closes the switch shortly after the trailing oblique edges, if they are correctly formed, have passed the said sensors.
  • a machine including two stationary control sensors located transversely and symmetrically to the row of oblique-edge sensors at a spacing from one another such that the front control sensor, as viewed in the conveying direction of the bags, opens, when influenced by a leading longitudinal edge of the bag and shortly before the leading oblique edges, if correctly formed, reach the oblique-edge sensors, an associated first switch in a circuit that transmits the fault impulses to the diverter, while the rear control sensor, when influenced by the trailing longitudinal edge of the bag, closes an associated second switch in the said circuit shortly after the trailing oblique edges if they are correctly formed have passed the oblique-edge sensors.
  • control sensors are displaceable to adjust the spacing between them.
  • a machine wherein the said storing and simultaneously transmitting means for the fault impulses comprise electronic operating members or a relay with a holding device and a cam wheel revolving in phase with the machine, said means being effective to transmit a stored fault impulse to the said actuating means for the diverter at a predetermined time by closing a switch in the circuit of the relay or electronic operating members, and wherein a second cam wheel is provided for sequentially erasing the stored impulses after each bag hasbeen checked.
  • the sensors comprise photoelectric detectors, the oblique-edge sensors opening associated further switches in the said circuit in response to a luminous signal and closing them in response to a dark signal, while the control sensors close the said first and second switches in response to a luminous signal and open them in response to a dark signal.

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  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
US825900A 1968-05-22 1969-05-19 Bag making machine Expired - Lifetime US3583296A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1761466A DE1761466C3 (de) 1968-05-22 1968-05-22 Sackmaschine

Publications (1)

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US3583296A true US3583296A (en) 1971-06-08

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Application Number Title Priority Date Filing Date
US825900A Expired - Lifetime US3583296A (en) 1968-05-22 1969-05-19 Bag making machine

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US (1) US3583296A (de)
JP (1) JPS528743B1 (de)
DE (1) DE1761466C3 (de)
FR (1) FR2009067A6 (de)
GB (1) GB1265379A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5654802A (en) * 1994-10-06 1997-08-05 Oji Seitai Kaisha, Ltd. Method and device for inspecting bags
US5782731A (en) * 1995-01-30 1998-07-21 Windmoeller & Hoelscher Method for checking the correct manufacture of cross bottom valve sacks
US6666250B2 (en) * 2000-11-02 2003-12-23 Windmoeller & Holescher Device for pressing the adhesive-glued areas of continuously conveyed, flat objects
US20120108409A1 (en) * 2009-01-28 2012-05-03 Uwe Koehn Device for producing bags from hose-shaped material
CN110466202A (zh) * 2019-09-23 2019-11-19 江阴市汇通印刷包装机械有限公司 一种包装袋八边封翻边装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805212C3 (de) * 1978-02-08 1980-10-02 Windmoeller & Hoelscher, 4540 Lengerich Vorrichtung zum Prüfen der Bodenfaltungen von an Schlauchstücken angeformten Böden
DE2805979A1 (de) * 1978-02-13 1979-08-16 Windmoeller & Hoelscher Vorrichtung zum pruefen der bodenfaltungen von an schlauchstuecken angeformten boeden
DE2807842C2 (de) * 1978-02-23 1986-06-05 Windmöller & Hölscher, 4540 Lengerich Verfahren und Vorrichtung zum Prüfen der Bodenfaltungen von an Schlauchstücken angeformten Böden
JPS5753125U (de) * 1980-09-11 1982-03-27
JPS6086624U (ja) * 1983-11-18 1985-06-14 川崎重工業株式会社 ドツグクラツチ
EP0557609B1 (de) * 1991-12-19 1997-03-12 SYSTEM KURANDT GmbH Vorrichtung zur On-Line-Kontrolle von Faltschachtel-Zuschnitten
US6960360B2 (en) 2000-08-31 2005-11-01 Phenolics, Llc Efficient method for producing compositions enriched in total phenols
DE102008017444B4 (de) * 2008-04-03 2011-07-28 Windmöller & Hölscher KG, 49525 Vorrichtung und Verfahren zur Herstellung von Säcken aus Schlauchstücken

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374714A (en) * 1964-08-20 1968-03-26 Berghgracht Marius Installations for the manufacture of large-capacity bags
US3433135A (en) * 1966-10-31 1969-03-18 West Virginia Pulp & Paper Co Bag inspection method and apparatus therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374714A (en) * 1964-08-20 1968-03-26 Berghgracht Marius Installations for the manufacture of large-capacity bags
US3433135A (en) * 1966-10-31 1969-03-18 West Virginia Pulp & Paper Co Bag inspection method and apparatus therefor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5654802A (en) * 1994-10-06 1997-08-05 Oji Seitai Kaisha, Ltd. Method and device for inspecting bags
US5782731A (en) * 1995-01-30 1998-07-21 Windmoeller & Hoelscher Method for checking the correct manufacture of cross bottom valve sacks
US6666250B2 (en) * 2000-11-02 2003-12-23 Windmoeller & Holescher Device for pressing the adhesive-glued areas of continuously conveyed, flat objects
US20120108409A1 (en) * 2009-01-28 2012-05-03 Uwe Koehn Device for producing bags from hose-shaped material
US9409370B2 (en) * 2009-01-28 2016-08-09 Windmoeller & Hoelscher Kg Device for producing bags from hose-shaped material
CN110466202A (zh) * 2019-09-23 2019-11-19 江阴市汇通印刷包装机械有限公司 一种包装袋八边封翻边装置

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Publication number Publication date
JPS528743B1 (de) 1977-03-11
DE1761466C3 (de) 1978-03-09
DE1761466A1 (de) 1971-07-01
FR2009067A6 (de) 1970-01-30
DE1761466B2 (de) 1977-03-10
GB1265379A (de) 1972-03-01

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