US3455213A - Monitoring device for the presence of cellophane tear strips on cellophane packaging apparatus - Google Patents

Monitoring device for the presence of cellophane tear strips on cellophane packaging apparatus Download PDF

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Publication number
US3455213A
US3455213A US3455213DA US3455213A US 3455213 A US3455213 A US 3455213A US 3455213D A US3455213D A US 3455213DA US 3455213 A US3455213 A US 3455213A
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US
United States
Prior art keywords
cellophane
drum
strip
tear strips
tear
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
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English (en)
Inventor
Ariosto Seragnoli
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GD SpA
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GD SpA
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Publication date
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Publication of US3455213A publication Critical patent/US3455213A/en
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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
    • B65B65/00—Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details
    • B65B65/08—Devices for counting or registering the number of articles handled, or the number of packages produced by the machine
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/08—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to stop, or to control the speed of, the machine as a whole
    • 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
    • Y10T83/00—Cutting
    • Y10T83/081—With randomly actuated stopping means
    • Y10T83/091—Responsive to work sensing means
    • Y10T83/096—Detector supported on or urged against work
    • Y10T83/098—Resiliently biased

Definitions

  • a drum rotates with tear strips held by suction on its periphery.
  • the drum is part of an electrical circuit; the tear strips are of relatively high resistance.
  • Another part of the electrical circuit is urged toward contact with the drum, but, if the tear strips are correctly in position, their high resistance prevents closure of the circuit. Should an abnormal absence of the tear strips occur, the electrical circuit is closed and an alarm is sounded or the wrapping machine is shut off.
  • the present invention relates to an apparatus to check for the presence of the tear strip on a wrapping in cellophane wrapping operations.
  • Tear strips are placed in cellophane wrappings such as for cigarettes to provide easy opening of the wrapped packages. Early and rapid determination of improper placement of these tear strips by the wrapping machine is a critical aspect in cellophane wrapping operations.
  • An object of this invention is to provide an apparatus to detect a possible imperfection, or defect in the placement of tear strips or the absence thereof in the Wrapping as soon as it occurs.
  • Another object of the invention is to provide means to give immediate warning of such an occurrence to the operator of the wrapping machine and to stop the machine upon the occurrence thereof.
  • Yet another object of the invention is to provide the tear strip for a cellophane package with electrical resistance, and the packaging machine with a monitoring device, which instantaneously detects the absence of the electrical resistance strip to provide a warning and stopping of the packaging machine.
  • FIG. 1 shows a side view of the device
  • FIG. 2 shows a partial view of the device along line 22 of FIG. 1;
  • FIG. 3 shows a side view of an alternative embodiment of the device of FIG. 1;
  • FIG. 4 shows a partial view along line 22 of FIG. 1, of a further alternative embodiment of the device
  • FIG. 5 shows a side view of a further embodiment of the device
  • FIG. 6 shows a view along line 6-6 of the above embodiment of FIG. 5.
  • the moistening of the cellophane band 22 is made by rotating roll 26. Only a longitudinal portion of the surface of the roll is in turn moistened along a suitable circumferential strip by wick 30 which, for instance by capillary action, carries liquid 31 upward.
  • the liquid is a conventional solvent used to glue two cellophane elements together and is contained in container 32.
  • Tear strip 28 are applied to the band by known means.
  • the tear strips are deposited on a stationary support 33, from which one end of each strip is threaded onto drum 27.
  • the drum has on its periphery at zone 35 on which the end of strip 28 is introduced a large series of holes 34 which are subjected to suction by known means.
  • the strip 28 is drawn by suction, winding thereon.
  • the suction applied to the rotating holes 34 is limited 'to their position above zone A.
  • zone 35 of drum 27, on which strips 28 are wound to be compressed against band 22 is held between two grooves 36, 36', to prevent the moistened zone of band 22 from smearing the drum.
  • zone 35 is made in a width slightly smaller than that of the tear strip 28, so that, during contact with band 22, zone 35 is covered by the strip and cannot be smeared.
  • a sensitive element 60 placed between support 33 and zone A for superimposition of the band on the strip, gives a warning that the strip is missing.
  • absence of the strip is indicated already in this preparatory phase, most suitable phase for warning since useless unwinding of the further phases, which would occur with defective elements, is avoided.
  • the element 60 has a pawl 37, journaled at 38, which has a bottom surface with the same radius of curvature as drum 27, and rests on the drum itself pressed by a compressed spring 70.
  • the covering of drum 27 is electrically conductive and is grounded at 39; the contact surface of the pawl is electrically conductive and is connected by power line 40, to a terminal of transformer 42, which has the other terminal grounded at 39.
  • a relay 41 On power line 40 and in series with pawl 37 is placed a relay 41, which, when current goes through wire 40, is excited and acts on the switch 41 of the cellophaning machine, otherwise not shown, causing it to stop and at the same time preferably setting off an optical and/or acoustic warning signal.
  • the cellophaning machine is driven by an electric motor controlled by an electromagnetic switch.
  • the electromagnetic switch remains closed and keeps the cellophane wrapping machine running as long as the self-excitation auxiliary circuit of the winding of the electromagnetic switch is not interrupted.
  • two switches 41' and 41" are actuated by relay 41 the first switch being closed and the second open when relay 41 is not excited and vice versa.
  • Switch 41 is put in series in the self-excitation circuit of the electromagnetic switch. When current goes through relay 41, switch 41' is opened and the cellophane machine stops. Switch 41" is put in series with an alarm 52, see FIG. 1, fed, for example, by the same transformer 42, which gives a warning signal when current goes through at 37.
  • the pawl as long as it rests on the drum surface with the electrically insulated strip interposed, is insulated from the ground. No current flows.
  • the pawl support surface is developed circumferentially on drum 27 to a length necessary to keep the contact open even when the empty space 53 between one strip and the next passes under the pawl.
  • the pawl remains raised during the passages of the end of one strip and the beginning of the following strip.
  • the pawl comes in contact with the metal of the drum and closes the circuit of relay 41, causing the cellophaning machine to stop and setting oif the warning signal. The operator can then intervene before rejects occur.
  • the sensitive element 60 is made up of a pair of metal contact rollers 43, 43, carried by crosspiece 44 swinging like a balance at the end of shaft 45, journaled at 46 on a fixed base and pulled by a spring or weights, not shown, so as to shove rollers 43, 43 in contact with band 35, FIG. 4 of drum 27.
  • Rollers 43, 43' are electrically insulated from one another and are electrically connected with power lines 47, 47' which lead to transformer 42 and on which are inserted relays 48, 49 which, when excited, close electric switches 50, 51, put in series in relation to one another on a power line that feeds said relay 41.
  • pawl 37 has a width slightly larger than that of zone 35 of drum 27 and is held tight by connector 88 between two plates 54, 54' of electrically insulating material which go slightly down into grooves 36, 36, so as to guide strip 28 on its sides as it passes under pawl 37.
  • the sensitive contact element is made up of a single roller 55, which can turn idle on its pin 57, carried by the swinging arm 58.
  • Ann 58 is fulcrumed at 59 on a base.
  • Roller 55 presses on strip 28 and is electrically connected by line 40 to said relay 41, FIG. 1.
  • roller 55 has a Width slightly larger than that of zone 35 and is held tight between two electrically insulating disks 56, 56', with a diameter somewhat larger than that of roller 55, which rotate with the roller and go down slightly into grooves 36, 36, and guide strip 28 on its sides.
  • a package Wrapping machine such as for wrapping cigarette packages, applying prior to the wrapping of packages tear strips to a cellophane band with which the packages are to be wrapped, means to continuously advance said band and said tear strips into a joined integral relationship; said tear strips electrically insulated; means to sense continuously the electric resistance of said insulated tear strips; and means, actuated by said means to sense, to indicate a defectiveness in the electrical resistance of said tear strips.
  • the means to indicate comprising means to interrupt the means to continuously advance said band and said tear strips prior to their joining, whereby waste of unwinding of band and tear strips and of their joining during failure of the tear strip placement and defects in the tear strips are avoided.
  • said package wrapping machine comprising electric start and stop switch means; said means to interrupt comprising circuit means actuating said stop switch means on oc-- currence of a defect.
  • said means to sense comprising a rotatable electrically conductive drum over which said tear strips are advanced for future joining with said band, an electrical circuit means to actuate, upon its being closed, said means to indicate, said electrical circuit means closable by electrical connection of a leg with said drum, said tear strips passing between said leg and said drum, thereby interrupting closing, and contact means to make connection between said leg and said drum, when an insulating tear strip is defective, whereby the electrical circuit means is closed and actuates said means to indicate.
  • said means to indicate comprising automatic signal means for alarm and stopping of the package machine when said means to sense detects an abnormal absence of the electrical resistance of the tear strips.
  • said contact means being a rubbing pawl having a contact length along said drum of a length preventing closing of said electrical circuit means, except upon occurrence of an abnormal gap between one tearing strip and the next.
  • said contact means comprising a rotating roller and a cyclic switch including and operated by a cam to keep the electrical circuit means open while the normal gap between one tear strip and the next passes under the roller.
  • said contact means being a rotating wheel
  • said means to sense further comprising a time-delay relay for closing said circuit means only when contact between said wheel and said drum persists for a predetermined time.
  • said contact means comprising two rollers, each with its own relay-operated switch means to partially close said electrical circuit means in the absence of an interposed portion of said tear strips, said two switches connected in series in the electrical circuit means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Making Paper Articles (AREA)
  • Wrapping Of Specific Fragile Articles (AREA)
  • Packages (AREA)
US3455213D 1965-02-17 1966-02-16 Monitoring device for the presence of cellophane tear strips on cellophane packaging apparatus Expired - Lifetime US3455213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT371865 1965-02-17

Publications (1)

Publication Number Publication Date
US3455213A true US3455213A (en) 1969-07-15

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ID=11111519

Family Applications (1)

Application Number Title Priority Date Filing Date
US3455213D Expired - Lifetime US3455213A (en) 1965-02-17 1966-02-16 Monitoring device for the presence of cellophane tear strips on cellophane packaging apparatus

Country Status (7)

Country Link
US (1) US3455213A (enrdf_load_stackoverflow)
JP (1) JPS5025396B1 (enrdf_load_stackoverflow)
CH (1) CH428546A (enrdf_load_stackoverflow)
DE (1) DE1511599B2 (enrdf_load_stackoverflow)
GB (1) GB1140366A (enrdf_load_stackoverflow)
NL (1) NL144540B (enrdf_load_stackoverflow)
SE (1) SE333324B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224777A (en) * 1978-03-13 1980-09-30 Laurel Bank Machine Co., Ltd. Packaging paper near end detecting device in coin packaging machine
CN102837847A (zh) * 2012-09-28 2012-12-26 山东中烟工业有限责任公司青州卷烟厂 卷烟包装机条盒纸吸控装置
CN107161428A (zh) * 2017-06-30 2017-09-15 红云红河烟草(集团)有限责任公司 一种高速包装机大条透明纸偏移检测装置及其检测方法
US11084609B2 (en) * 2017-01-30 2021-08-10 Signode Industrial Group Llc Strapping apparatus having a tensioning device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240825C2 (de) * 1982-11-05 1985-06-20 Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg Vorrichtung zur Kontrolle der Anwesenheit einer Warenbahn
US5031896A (en) * 1990-01-17 1991-07-16 Brandt, Inc. Sheet detector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350244A (en) * 1940-11-29 1944-05-30 Redington Co F B Feeding mechanism for wrapping machines
US2424555A (en) * 1945-07-10 1947-07-29 American Viscose Corp Cutting apparatus
US2712800A (en) * 1952-02-04 1955-07-12 Forgrove Mach Apparatus for cutting pieces from a rope of toffee or the like material
US2864285A (en) * 1954-05-24 1958-12-16 S & S Corrugated Paper Mach Taping machine
US3272673A (en) * 1963-05-14 1966-09-13 Focke Pfuhl Verpack Automat Method of and device for providing wrapping material with a pull strip

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350244A (en) * 1940-11-29 1944-05-30 Redington Co F B Feeding mechanism for wrapping machines
US2424555A (en) * 1945-07-10 1947-07-29 American Viscose Corp Cutting apparatus
US2712800A (en) * 1952-02-04 1955-07-12 Forgrove Mach Apparatus for cutting pieces from a rope of toffee or the like material
US2864285A (en) * 1954-05-24 1958-12-16 S & S Corrugated Paper Mach Taping machine
US3272673A (en) * 1963-05-14 1966-09-13 Focke Pfuhl Verpack Automat Method of and device for providing wrapping material with a pull strip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224777A (en) * 1978-03-13 1980-09-30 Laurel Bank Machine Co., Ltd. Packaging paper near end detecting device in coin packaging machine
CN102837847A (zh) * 2012-09-28 2012-12-26 山东中烟工业有限责任公司青州卷烟厂 卷烟包装机条盒纸吸控装置
US11084609B2 (en) * 2017-01-30 2021-08-10 Signode Industrial Group Llc Strapping apparatus having a tensioning device
US11492157B2 (en) 2017-01-30 2022-11-08 Signode Industrial Group Llc Strapping apparatus having a tensioning device
CN107161428A (zh) * 2017-06-30 2017-09-15 红云红河烟草(集团)有限责任公司 一种高速包装机大条透明纸偏移检测装置及其检测方法

Also Published As

Publication number Publication date
DE1511599B2 (de) 1976-12-30
NL144540B (nl) 1975-01-15
JPS5025396B1 (enrdf_load_stackoverflow) 1975-08-22
DE1511599A1 (de) 1969-10-09
CH428546A (it) 1967-01-15
GB1140366A (en) 1969-01-15
SE333324B (sv) 1971-03-08
NL6602021A (enrdf_load_stackoverflow) 1966-08-18

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