US3420158A - Strap feed and tensioning mechanism - Google Patents

Strap feed and tensioning mechanism Download PDF

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Publication number
US3420158A
US3420158A US612910A US3420158DA US3420158A US 3420158 A US3420158 A US 3420158A US 612910 A US612910 A US 612910A US 3420158D A US3420158D A US 3420158DA US 3420158 A US3420158 A US 3420158A
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United States
Prior art keywords
strap
wheel
tension
speed
feed
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Expired - Lifetime
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US612910A
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English (en)
Inventor
Robert J Kobiella
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Signode Corp
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Signode Corp
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Publication date
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Publication of US3420158A publication Critical patent/US3420158A/en
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    • 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
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22—Means for controlling tension of binding means

Definitions

  • This invention relates to a mechanism for feeding strap about an article and removing any slack therein at a high rate of speed and for pulling high tension on the strap at a lower rate of speed.
  • the strap feeding operation can be done at a high rate of speed.
  • the slack in the strap can be removed at a similar high rate, since a minimum amount of force is required to accomplish this purpose.
  • a high tension must be placed on the strap to obtain a suitably tight package. In order to do this, provision must be made for applying a high torque to the strap.
  • a strap feeding and tensioning mechanism whereby a single power source through a relatively simple drive mechanism will function to feed a strap about an article and pull the slack out of the strap at a high rate of speed, yet will be capable of pulling a high tension on the strap through the same drive mechanism. This is accomplished by disposing the strap about a feed wheel which is driven at a high rate of speed to obtain a high feeding rate. The strap is subsequently directed about, but substantially out of contact with a low-speed, high-torque wheel, which low-speed wheel will not substantially affect the speed at which the strap is fed.
  • the movement of the high-speed feed wheel is reversed to take up the slack in the strap at a high speed.
  • the high-speed wheel takes up the slack, it begins to slip, after which the lower speed or tension wheel takes over and draws the desired tension in the strap.
  • the strap is directed about a low-speed tension wheel, but the tension wheel overruns and does not restrict the high-speed takeup of the slack in the strap.
  • the tension wheel draws a high tension on the strap and wraps it tightly about the article to be tied. The tension is retained in the strap after it has reached its preset value until the strap is sealed in place.
  • a mechanism whereby the foregoing may be accomplished includes a single motor which drives a large diameter tension gear from a drive pinion secured to a motor shaft.
  • the tension gear in turn drives a smaller diameter pinion that is disposed on a shaft to which the feed wheel is connected.
  • the pinion drives the feed wheel shaft through a slip clutch, with the result that during the feeding operation and slack takeup where there is low torque on the feed wheel, the feed wheel will be rotated at a high speed relative to that of the large diameter tension gear.
  • a tension gear for drawing high tension on the strap is connected to the tension wheel through an overrunning clutch, which overrunning clutch is unlocked during the feeding action to disconnect the tension wheel from the tension gear during the feeding movement of the tension gear.
  • the strap is fed about and engaged with the feed wheel by suitably located pinch rolls. After leaving the feed wheel the strap is directed into a guide partially surrounding but spaced from the tension wheel whereby the strap is guided about the tension wheel, but out of contact therewith, thus not impeding the feeding movement of the strap.
  • the motor and the rotation of the tension gear is reversed through the drive pinion connected to the drive motor with the result that the feed wheel is reversed and the slack in the strap is taken out at a high speed.
  • the strap engages the tension wheel and the tension wheel overruns the tension gear as permitted by an overrunning clutch interconnecting the tension wheel shaft and tension gear.
  • the feed wheel begins to slip relative to the clip clutch pinion until it reaches the speed at which the tension wheel is being driven by the tension gear.
  • the tension gear then takes over and positively drives the tension wheel at a relatively low rate of speed to pull a high final tension in the strap.
  • a suitable locking mechanism could be engaged with the feed wheel shaft. The motor is thus free to be disengaged from the drive pinion and used elsewhere if desired. It is also noted that a clutch or other mechanism can be provided to establish the maximum tension to be drawn on the strap.
  • the strap can be fed at a high speed and low torque and can be tensioned at a low speed and high torque from a single source of power through relatively simple gear and clutch mechanisms.
  • FIGURE :1 shows an elevation view of a strapping mechanism used for wrapping strap about a package
  • FIGURE 2 is a perspective view of the strapping and tensioning mechanism.
  • FIGURE 1 it is seen that there is a feed roll 2 from which strap is drawn to wrap about a package.
  • the strap 4 is directed about the feeding and tensioning mechanism 6 and about the package 10.
  • a sealing mechanism 8 of any suitable design is actuated to secure the overlapped strap portions in place.
  • the mechanism is shown as applicable to both steel and plastic straps, and various types of sealing mechanisms can be used, such as metal seals or a seal formed by fusing the overlapped strap portions in place.
  • FIGURE 2 there is shown a main drive shaft 14 which is driven by the motor 12 through a clutch 16.
  • the clutch 16 can be set to establish the maximum torque to be placed on the drive shaft to determine the final tension to be provided in the strap 4.
  • a drive pinion 17 Secured to the drive shaft 14 is a drive pinion 17, which meshes with a tension gear 18 that is geared on its opposite side to a slip clutch pinion 20.
  • the slip clutch pinion 20 drives a feed wheel shaft 22 through a friction slip clutch 24.
  • the feed wheel 26 is keyed to one end of the feed Wheel shaft 22.
  • the relative diameters of the clutch pinion 20 and the tension gear 18 are such that the clutch pinion will operate at approximately four times the speed of the tension gear. This relationship is by way of example only since other gear ratios can be established if desired.
  • the strap 4 which is payed out from the feed roll 2 is grabbed between the feed Wheel 26 and a lower pinch roll 27 and is directed thereabout within a strap guide 28.
  • the strap is biased into engagement with the feed wheel by an upper pinch roll 29.
  • the pinch rolls are biased into engagement with the feed wheel by a tension spring 31 secured to rods 27a, 29a connected to rolls 27, 29, respectively.
  • the angle of wrap around the feed wheel provides the pulling force for taking strap from the feed roll.
  • the upper pinch roll provides the initial energizing force for the wrapping effect and the slip clutch 24 is set to provide enough pulling torque.
  • the strap 4 then enters a strap guide 30 disposed adjacent and partially surrounding the tension wheel 32.
  • the resistance of the lead edge of the strap going around the guides 30 tends to make the strap hug the curve of guide 30, keeping the strap from any appreciable contact pressure against the tension wheel.
  • the tension wheel will not impede the high speed feeding rate imposed on the strap by the feed wheel.
  • the strap moves upwardly into position about the article to be packaged. Suitable guides, not shown, are employed for directing the strap about the package 10.
  • the tension wheel 32 is secured to a shaft 34, which interconnects with the tension gear 18 through an overrunning clutch 36.
  • the pawl and ratchet 38, 40, respectively, of the clutch 36 is designed so that during the feeding rotation of the tension gear, which in this case is counterclockwise, the pawl 38 will run free relative to the ratchet 40 and the tension wheel will remain stationary. It is, however, understood that the tension wheel could be made to rotate during the feeding operation in the illustrated embodiment, if desired, without detracting from the present invention.
  • the drive motor is reversed and the drive pinion 17 and tension gear 18 are rotated counterclockwise and clockwise, respectively.
  • the clockwise movement of the tension gear 18 drives the slip clutch pinion 20 in the counterclockwise direction, with the result that the feed wheel is reversed.
  • the lower pinch roll 27 energizes the wrapping effect to pull back the strap to take up the slack in the strap at a high rate of speed, at which time the strap is biased into engagement with the tension wheel and wraps thereabout.
  • the faster running feed wheel pulling back the strap at a high speed speeds up the tension wheel, which is permitted by the overrunning clutch 36.
  • the feed wheel heretofore operating at a high rate of speed meets resistance around the article and begins to slip with an attendant reduction in speed due to slippage at the slip clutch pinion.
  • the tension wheel also drops in speed and the speed of both wheels continues to drop until the speed of the overrunning clutch 36 matches the speed of the tension wheel.
  • the overrunning clutch 36 will then lock to the tension shaft to drive the tension wheel at the lower and consequently higher torque speed.
  • the slip clutch setting provides a continuous driving torque to the feed wheel while it slips, which torque imparts an energizing strap tension, which the tension wheel multiplies with its wrap angle.
  • a pawl 42 may be energized to engage a ratchet 44 to lock the shaft 22 in position to retain the tension in the strap.
  • a solenoid 46 is shown for operating the pawl. It is noted that this pawl arrangement will be maintained out of engagement during the feeding cycle, so as not to affect the movement of the feed wheel shaft 22. This is but one of various mechanisms which can be used to retain the tension in the strap.
  • the motor 12 may be disconnected from the system and used for some other operation, if desired.
  • a feed and tension mechanism for strapping to be directed about an article for securing same including first and second wheels about which a strap is disposed, means for driving the first wheel at a relatively high rate of speed in one direction to feed the strap at a fast rate and for driving it in the other direction to take up the slack at a fast rate, means for directing the strap into engagement with the first wheel and for guiding the strap out of engagement with the second wheel during feeding and for guiding the strap into engagement with the first wheel during slack takeup, whereby the strap is fed and the slack taken out at a high rate of speed and the strap is moved into engagement with the second wheel, and means for driving the second wheel at a lower rate of speed to pull high tension on the strap.
  • a feed and tensioning mechanism as set forth in claim 1 wherein the drive means for driving said wheels during feeding and tensioning includes a common power source which actuates a plurality of drive elements interconnecting the power source and first and second wheels.
  • a strap feeding and tensioning mechanism as set forth in claim 2 including a first clutch means between said first wheel and power source, whereby the first Wheel can slip when high tension is drawn on the strap, and a second clutch means between the power source and second wheel whereby during slack takeup the second wheel can move free but after the slack has been removed the second wheel will act to pull high tension on the strap.
  • a feed and tension device as set forth in claim 3 including means for limiting the tension pulled on the strap and means for retaining the strap under tension whereby the power source can be deactuated.
  • a strap feed and tensioning mechanism for feeding strap about an article at a high rate of speed and for pulling a high tension on the strap at a lower speed after the strap has been disposed about an article and before it has been secured in place, comprising a first wheel and a second wheel about which the strap is directed, means including a common power source for driving the first wheel at a relatively high speed during feeding and for driving the second wheel at a lower speed during tensioning to pull a high tension on the strap disposed about the article, means for maintaining the strap out of engagement with the second wheel during feeding and for biasing the strap into engagement with the second wheel during the tensioning operation whereby the second wheel Will not hamper the rapid feeding operation but will be effective to pull a high tension on the strap.
  • a feed and tensioning mechanism as set forth in claim 5 in which the first wheel is driven in a direction to take up the slack in the strap at a high rate and means are provided between the first wheel and the drive means for the first wheel whereby the first wheel can slip relative to said drive means and permit the high tension to be drawn on the strap by the second wheel.
  • a strap feed and tensioning mechanism comprising a feed wheel and a tension wheel; means for guiding a strap about said feed wheel; drive means for said wheels including a single motor, gear means for driving said feed Wheel at a high rate of speed during feeding and slack takeup and for driving said tension wheel at a low rate of speed to pull a high tension on the strap; means for guiding the strap out of contact with said tension wheel during feeding; means for disengaging said gear means from said tension wheel during feeding, means for directing the strap into engagement with said tension wheel during tensioning; means for permitting slipping of said feed wheel when the tension wheel acts to pull a high tension on the strap, said last mentioned means and said disengaging means including clutches whereby the prescribed movements of the feed and tension wheels can take place.
  • a feed and tensioning mechanism as set forth in claim 7 including means for maintaining the tension in the strap, thus permitting disengagement of the motor means.
  • the method of feeding strap about a package at a high rate of speed and for drawing the slack in the strap at a high rate of speed and then pulling a high tension on the strap at a lower rate of speed consisting of the steps of directing a strap about a highspeed wheel and a lowspeed wheel, driving the high-speed Wheel at a high rate while maintaining the strap out of substantial engagement with the low-speed wheel and then reversing the direction of the high-speed wheel and driving the low-speed wheel 25 in a direction complementary thereto to take up the slack first at a rapid rate and then at a lower rate to pull a high tension in the strap.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
US612910A 1967-01-31 1967-01-31 Strap feed and tensioning mechanism Expired - Lifetime US3420158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61291067A 1967-01-31 1967-01-31

Publications (1)

Publication Number Publication Date
US3420158A true US3420158A (en) 1969-01-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US612910A Expired - Lifetime US3420158A (en) 1967-01-31 1967-01-31 Strap feed and tensioning mechanism

Country Status (5)

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US (1) US3420158A (de)
CH (1) CH454731A (de)
DE (1) DE1611979B1 (de)
FR (1) FR1551755A (de)
GB (1) GB1191991A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011807A (en) * 1976-01-21 1977-03-15 Signode Corporation Strap feeding and tensioning machine
US4077313A (en) * 1976-12-20 1978-03-07 Signode Corporation Method of tensioning and joining a formed strap loop about a package
US4209120A (en) * 1977-10-27 1980-06-24 Sig Schweizerische Industrie-Gesellschaft Apparatus for intermittently advancing a sheet of indeterminate length
US4328742A (en) * 1980-02-25 1982-05-11 Cyklop Strapping Corp. Strapping apparatus feed and tension mechanism
US4372206A (en) * 1979-04-18 1983-02-08 Codimag Device for controlling the movement of a web through a printing machine
EP0189516A2 (de) * 1984-12-28 1986-08-06 Nichiro Kogyo Company, Ltd. Bandzufuhr und Spannvorrichtung
US4605456A (en) * 1985-05-02 1986-08-12 Signode Corporation Method and apparatus for feeding and tensioning strap in a strapping machine
US4621756A (en) * 1984-07-02 1986-11-11 International Business Machines Corporation Web feeding mechanism
US4635541A (en) * 1984-12-29 1987-01-13 Nichiro Kogyo Company Ltd. Method of feeding and tightening a band in a band strapping machine and apparatus thereof
US5146847A (en) * 1991-04-01 1992-09-15 General Motors Corporation Variable speed feed control and tensioning of a bander
EP0669252A1 (de) * 1994-02-28 1995-08-30 Signode Corporation Vorrichtung und Verfahren zur Spannbandaufnahme
US6038967A (en) * 1996-11-18 2000-03-21 Ovalstrapping, Inc. Strapping machine having primary and secondary tensioning units and a control system therefor
US20040140384A1 (en) * 2003-01-21 2004-07-22 Goodley George F. Strap tensioning apparatus
JP2020186059A (ja) * 2019-05-10 2020-11-19 長諺工業股▲ふん▼有限公司 包装機
WO2023004232A3 (en) * 2021-07-23 2023-03-16 Signode Industrial Group Llc Strapping tool

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH605258A5 (de) * 1976-10-08 1978-09-29 Strapex Ag
AU511791B2 (en) * 1976-11-03 1980-09-04 Signode Corp. Strapping machine
US4218969A (en) * 1979-02-01 1980-08-26 Nichiro Kogyo Company, Limited Band feeding and tightening apparatus for strapping machine
DE2906756A1 (de) * 1979-02-21 1980-09-04 Nichiro Kogyo Kk Verfahren und vorrichtung zum zufuehren und spannen eines spannbandes
DE3249559A1 (de) * 1982-05-29 1985-08-14 Hoesch Ag, 4600 Dortmund Vorschub- und spannvorrichtung fuer ein um ein packstueck zu spannendes umreifungsband
DE3220446A1 (de) * 1982-05-29 1984-01-26 Hoesch Werke Ag, 4600 Dortmund Vorschub- und spannvorrichtung fuer ein um ein packstueck zu spannendes umreifungsband
DE19523274A1 (de) * 1995-06-27 1997-01-09 Mosca G Maschf Maschine zum Umschnüren von Packstücken

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195043A (en) * 1939-01-03 1940-03-26 Stanley Works Wire tying machine
US2215121A (en) * 1931-04-24 1940-09-17 Gerrard Co Inc Binding machine
US2864267A (en) * 1955-09-02 1958-12-16 Gerrard Ind Ltd Transmission for packaging machines
US3023693A (en) * 1956-11-13 1962-03-06 Signode Steel Strapping Co Strap feeding and tensioning mechanism
US3179038A (en) * 1962-11-20 1965-04-20 Gerrard Company Ltd Wire tying machine
US3196779A (en) * 1961-08-28 1965-07-27 Ovalstrapping Ltd Automatic strapping machine
US3269300A (en) * 1964-12-29 1966-08-30 Fmc Corp Strapping machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057011B (de) * 1953-12-16 1959-05-06 Gerrard Ind Ltd Umschnuerungsmaschine
GB848211A (en) * 1957-01-21 1960-09-14 Automatic Strapping Machines L Improvements in package and like binding mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2215121A (en) * 1931-04-24 1940-09-17 Gerrard Co Inc Binding machine
US2195043A (en) * 1939-01-03 1940-03-26 Stanley Works Wire tying machine
US2864267A (en) * 1955-09-02 1958-12-16 Gerrard Ind Ltd Transmission for packaging machines
US3023693A (en) * 1956-11-13 1962-03-06 Signode Steel Strapping Co Strap feeding and tensioning mechanism
US3196779A (en) * 1961-08-28 1965-07-27 Ovalstrapping Ltd Automatic strapping machine
US3179038A (en) * 1962-11-20 1965-04-20 Gerrard Company Ltd Wire tying machine
US3269300A (en) * 1964-12-29 1966-08-30 Fmc Corp Strapping machine

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011807A (en) * 1976-01-21 1977-03-15 Signode Corporation Strap feeding and tensioning machine
US4077313A (en) * 1976-12-20 1978-03-07 Signode Corporation Method of tensioning and joining a formed strap loop about a package
US4209120A (en) * 1977-10-27 1980-06-24 Sig Schweizerische Industrie-Gesellschaft Apparatus for intermittently advancing a sheet of indeterminate length
US4372206A (en) * 1979-04-18 1983-02-08 Codimag Device for controlling the movement of a web through a printing machine
US4328742A (en) * 1980-02-25 1982-05-11 Cyklop Strapping Corp. Strapping apparatus feed and tension mechanism
US4621756A (en) * 1984-07-02 1986-11-11 International Business Machines Corporation Web feeding mechanism
EP0189516A3 (en) * 1984-12-28 1988-06-01 Nichiro Kogyo Company, Ltd. Band feeding and tightening apparatus and method of feeding and tightening a band
EP0189516A2 (de) * 1984-12-28 1986-08-06 Nichiro Kogyo Company, Ltd. Bandzufuhr und Spannvorrichtung
AU574214B2 (en) * 1984-12-28 1988-06-30 Nichiro Kogyo Co. Ltd. Band feeding and tightening apparatus
US4653394A (en) * 1984-12-28 1987-03-31 Nichiro Kogyo Company, Ltd. Band feeding and tightening apparatus and method of feeding and tightening a band
US4635541A (en) * 1984-12-29 1987-01-13 Nichiro Kogyo Company Ltd. Method of feeding and tightening a band in a band strapping machine and apparatus thereof
AU572343B2 (en) * 1984-12-29 1988-05-05 Nichiro Kogyo Co. Ltd. Feeding and tightening a band in a band strapping machine
US4605456A (en) * 1985-05-02 1986-08-12 Signode Corporation Method and apparatus for feeding and tensioning strap in a strapping machine
EP0203278A3 (en) * 1985-05-02 1988-06-08 Signode Corporation Method and apparatus for feeding and tensioning strap in a strapping machine
EP0203278A2 (de) * 1985-05-02 1986-12-03 Signode Corporation Verfahren und Vorrichtung zum Zuführen und Spannen eines Bandes in einer Umreifungsmaschine
US5146847A (en) * 1991-04-01 1992-09-15 General Motors Corporation Variable speed feed control and tensioning of a bander
EP0669252A1 (de) * 1994-02-28 1995-08-30 Signode Corporation Vorrichtung und Verfahren zur Spannbandaufnahme
AU662865B1 (en) * 1994-02-28 1995-09-14 Signode Corporation Method and apparatus for a two speed strap take up
US5516022A (en) * 1994-02-28 1996-05-14 Illinois Tool Works, Inc. Method and apparatus for a two speed strap take up
US6038967A (en) * 1996-11-18 2000-03-21 Ovalstrapping, Inc. Strapping machine having primary and secondary tensioning units and a control system therefor
US20040140384A1 (en) * 2003-01-21 2004-07-22 Goodley George F. Strap tensioning apparatus
US7082872B2 (en) 2003-01-21 2006-08-01 Eam-Mosca Corporation Strap tensioning apparatus
JP2020186059A (ja) * 2019-05-10 2020-11-19 長諺工業股▲ふん▼有限公司 包装機
WO2023004232A3 (en) * 2021-07-23 2023-03-16 Signode Industrial Group Llc Strapping tool

Also Published As

Publication number Publication date
GB1191991A (en) 1970-05-13
CH454731A (de) 1968-04-15
FR1551755A (de) 1968-12-27
DE1611979B1 (de) 1971-04-08

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