CA2217063A1 - Tension release delay mechanism for manual pneumatic seal type strapping tool - Google Patents
Tension release delay mechanism for manual pneumatic seal type strapping tool Download PDFInfo
- Publication number
- CA2217063A1 CA2217063A1 CA002217063A CA2217063A CA2217063A1 CA 2217063 A1 CA2217063 A1 CA 2217063A1 CA 002217063 A CA002217063 A CA 002217063A CA 2217063 A CA2217063 A CA 2217063A CA 2217063 A1 CA2217063 A1 CA 2217063A1
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- CA
- Canada
- Prior art keywords
- lever
- strapping
- tension
- seal
- tool
- 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.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
-
- 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
- B65B13/185—Details of tools
- B65B13/187—Motor means
- B65B13/188—Motor means pneumatic or hydraulic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0092—Tools moving along strips, e.g. decorating or sealing strips, to insert them in, or remove them from, grooves or profiles
-
- 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
- B65B13/24—Securing ends of binding material
- B65B13/34—Securing ends of binding material by applying separate securing members, e.g. deformable clips
- B65B13/345—Hand tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Abstract
In a pneumatically operable strapping tool, a tension lever is provided for controlling an internal pneumatic or air control valve which, in turn, controls an air motor drive operatively connected to a feedwheel which tensions the strapping material, disposed about an article or package to be strapped, to a predetermined tension level. A seal lever is provided in conjunction with the tension lever such that upon completion of the tensioning phase of the strapping operation, the seal lever may be actuated so as to initiate the sealing phase of the strapping operation. In order to prevent a partial loss or a reduction of the tension level within the strapping which normally occurs during the transition between the tensioning and sealing phases of the strapping operation, the seal lever is provided with a tang, tab, or ear member which physically encounters or engages the tension lever so as to maintain the tension lever at its operative or active position during the sealing phase of the strapping operation. In this manner, the tensioning phase of the strapping operation is not prematurely terminated and termination of the tensioning phase of the strapping operation is effectively delayed until the sealing phase of the strapping operation has been completed. Therefore, a proper tension level within the sealed strapping is achieved.
Description
~ .. CA 02217063 1997-09-30 ,.
.
TENSION RELEASE DELAY MEC~ANISM FOR MANUAL
PNEUMATIC SEAL TYPE STRAPPING TOOL
FIELD OF THE INVENTION
The present invention relates generally to pneumat-ically operable tools for crimping or applying a metal seal about the overlapping portions of a tensioned loop of strap-ping which has been encircled about an object or article to be strapped for ensuring the integrity of the object or arti-cle during storage or transportation thereof, and more par-ticularly, to a pneumatically operable strapping tool whichis provided with a new and improved interlock ~~h~n; sm de-fined between the tension and seal levers of the strapping tool so as to ensure the maintenance of a proper tension lev-el within the strapping during the sealing operation.
~3ACKGROUND OF THE INVENTION
Pneumatically operable tools, for crimping or apply-ing metal seals about the overlapping portions of a tensioned loop of strapping which has been encircled about an object or article to be strapped, are of course well-known in the art.
One early type of conventional pneumatically operable tool of the aforenoted type is disclosed within United States Patent 3,552,450 which issued to Larry Plunkett and is assigned to the assignee of the present patent application. Other more current types of conventional pneumatically operable strap-ping tools are disclosed within the SIGNODE Operation, Partsand Safety Manual for the PNSC-12/58/34 Push Type Combination ; -. CA 02217063 1997-09-30 Strapping Tool, and within the ORGAPACX Operations Manual for the CR 25 A Steel Strapping Tool.
As can be readily appreciated from the ORGAPACK
Operations Manual, and as more particularly noted and deR-cribed on Pages 7 and 8 thereof, the tool comprises a green-colored tension lever and a yellow-colored seal lever. As is known, each of these actuating levers operate or control in-ternal valves which, in turn, operate or control pneumatic-ally operable motors for operating or actuating the tension and sealing mechanisms. In utilizing the strapping tool in order to apply or secure tensioned strapping about an article or object to be strapped, the strapping is initially drawn from a supply reel of strapping material, the free end of the strapping is inserted through the uncrimped seal member, and the loop of strapping is then encircled about the article or object to be strapped. After manually tightening the loop of strapping about the article or object so as to remove a large portion of slack within the looped strapping, an overlapped end of the strapping is inserted into the feedwheel -ch~nism of the strapping tool. The green-colored tension lever is then actuated so as to actuate one of the internal valves which, in turn, actuates the air motor operatively associated with the feedwheel mechanism. The latter tensions the strap-ping, disposed about the article or object being strapped, to a predetermined tension level which will be indicated to the operator as a result of the feedwheel motor drive stalling.
Upon stalling of the feedwheel motor drive, the yellow seal lever is then actuated so as to similarly actuate the other one of the internal valves which, in turn, actuates the air motor operatively associated with the sealing jaw me~h~nism so as to perform the seal crimping, sealing, and strap cut-ting operations.
While the aforenoted type of prior art strapping tools operate quite satisfactorily and have of course been quite successful in the marketplace, such tools do exhibit some operational drawbacks or deficiencies which, if properly ~ ' CA 02217063 1997-09-30 t addressed, would provide strapping which is more secure when such strapp ng is disposed about the objects, loads, articles or packages~being s~rapped with such strapping. More particu-larly, the tension and seal levers of such pneumatically ope-S rated strapping tools are interrelated or re~hAnically inter-connected with respect to each other by an internal cam mech-anism. Consequently, when the seal lever is actuated after the tension or feedwheel motor drive stalls, the depression of the seal lever, through means of such interrelated or me-chanically interconnected cam ~echAnism, permits the tensionlever to be released from its actuated position. Accordingly, actuation of the tension or feedwheel motor drive, through means of the aforenoted internal pneumatic valving, is termi-nated. However, due to the fact that the strapping has neces-lS sarily been subjected to such a high degree of tension by thefeedwheel motor drive in order to properly tension or load the strapping being disposed about the particular article, object, or package being strapped, due to the additional fact that t}.e strapping exhibits a predetermined amount of inher-ent resiliency, and due to the passage of a predeterminedamount of time, however small, which elapses between the ter-mination of the tension or feedwheel motor drive and the ac-tuation and completion of the sealing operation, the tension level or value achieved by the tension or feedwheel motor drive at the time of stalling is not able to be maintained and accordingly the amount of tension within the tensioned strapping is undesirably reduced to a level which renders the strapping, disposed about the article, load, or package, to exhibit a degree of fixation which is not as secure as is de-sired.
Therefore, there is a need in the art, to which thepresent invention is addressed, for a pneumatically operable strapping tool wherein the tension level, previously develop-ed within the strapping during the tensioning phase of the strapping operation, is able to be fully maintained within the strapping, at the same tension level and without any re-~ I
duction in such tension level, during the sealing phase of the strapping operation even though actuation of the seal lever has caused the internal cammed interlock mechanism de-fined between the seal and tension levers to disengage the tension lever from its actuated and locked position.
,~
OBJECTS OF THE I~VENTION
Accordingly, it is an object of the present inven-tion to provide a new and improved pneumatically operable strapping tool for fastening and securing strapping about ar-ticles, loads, packages, or the like, in order to securelyfasten or bind the same for storage or transportation pur-poses.
Another object of the present invention is to pro-vide a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like, which does not exhibit the ope-rational drawbacks or deficiencies of the prior art pneumat-ically operable strapping tools for fastening and securing strapping about articles, loads, packages, or the like as has been noted hereinbefore.
A further object of the present invention is to provide a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like, wherein the tension level, pre-viously developed within the strapping during the tensioningphase of the strapping operation, is able to be fully main-tained within the strapping, at the same tension level and without any reduction in such tension level, during the seal-ing phase of the strapping operation even though actuation of the tension lever has been disengaged or released from its actuated and locked position as a result of the actuation of the seal lever and the operation of the cam mechanism inter-connecting the seal lever and the tension lever.
CA 022l7063 l997-09-30 SUMMARY OF T~F INV~NTION
The foregoing and other objectives are achieved in accordance with the present invention through the provision of a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like in order to securely fasten or bind the same for storage or transportation purposes, wherein the seal lever is provided with an outwardly projecting or transverse-ly extending tab or tang member which is adapted to extend over or above the tension lever. Consequently, when the seal lever is depressed and moved downwardly so as to initiate the sealing operation, the tab or tang member of the seal lever will engage an external portion of the tension lever and thereby maintain the tension lever in its depressed or down-ward po5ition.
In this manner, despite the internal release ordisengagement of the tension lever from its downwardly ac-tuated and locked position as a result of the engagement of an associated tension lever lock lever by means of an intern-al cam mechanism defined between the seal lever and the ten-sion lever lock lever, the tension lever is physically main-tained in its downward depressed position such that the in-ternal pneumatic or air control valve, operatively associated therewith for controlling the air motor driving the strap-tensioning feedwheel ~chAnism, is nevertheless maintainedactivated or open so as to conduct a supply of compressed air to the air motor driving the feedwheel ?~hani . Therefore, the feedwheel ~~hanism is maintained active and in its drive state, and consequently, the predetermined tension level pre-viously developed within the strapping by the feedwheel mech-anism during the tensioning phase of the strapping operation is now able to be fully maintained within the strapping, at the same tension level and without any reduction in such ten-sion le~,el, during the sealing phase of the strapping opera-tion.
\ -5-~ ' ~
~RIEF DESCRIPTION OF THE DRAWING
~ Various other objects, features, and attendant ad-vantages of the present invention will be more fully appreci-ated from the following detailed description of the present invention when considered in conjunction with the accompany-ing drawing wherein: .~
The SOLE FIGURE is a perspective view of the new and improved pneumatically operable strapping tool, for fas-tening and securing strapping about articles, loads, pack-ages, or the like in order to securely fasten or bind thesame for storage or transportation purposes, constructed in accordance with the teachings of the present invention and showing the various cooperative parts thereof.
DETAI~ED DESCRIPTION OF THE PREFERRED EM~ODIMENT
R~ferring r.ow to the drawing, the new and improved pneumatically operable strapping tool, for fastening and se-curing strapping about articles, loads, packages, or the like in order to securely fasten or bind the same for storage or transportation purposes, is generally indicated by the refe-rence character 10. The tool 10 conventionally comprises a feedwheel 12, which is provided for drivably engaging one of the overlapped ends of the strapping encircled about the ar-ticle, load, package, or the like to be strapped, and the feedwheel 12 is adapted to be mounted upon a transversely extending feedwheel drive shaft 14 which projects laterally outwardly from a feedwheel gear housing 16. The feedwheel 12 is provided with an axial through-bore 18 which has a hexag-onal configuration, and feedwheel drive shaft 14 is provided with a section 20 wherein the external configuration of sec-tion 20 is hexagonal such that the feedwheel drive shaft 14is drivingly mated with feedwheel 12 as a result of the feed-'~ CA 02217063 1997-09-30 .
wheel drive shaft section 20 being accommodated within the hexagonally shaped through-bore 18 of the feedwheel 12. An air motor 2' has suitable drive components thereof, not shown, operàtively connected to suitable gear components, not shown, of the gear housing 16 so as to transmit rotary drive from the air motor 22 to the feedwheel 12 through means of the gear housing 16 and feedwheel drive shaft 14.
The strapping tool 10 further comprises a tension lever 24 which is pivotably mounted upon an upstanding brack-et 26 by means of a suitable pivot pin 28 such that the ten-sion lever 24 is pivotably movable between a first, upper, inoperative or inactive position as illustrated, and a sec-ond, lower operative or active position, not illustrated, at which the tension lever 24 actuates a suitable air valve, not shown, which is fluidically connected to the air motor 22 so as to permit the drive thereof to be transmitted to the gear housing 16 and feedwheel 12. An upstanding tension lever lock lever 30 is pivotably mounted upon the tool 10 such that a first shoulder portion 32 thereof engages the tension lever 24 when the latter is disposed at its first, upper, inopera-tive or inactive position, and the tension lever lock lever 30 is also provided with a second shoulder portion, not shown, which is disposed vertically beneath the first should-er portion 32 in a spaced arrangement with respect thereto and which is adapted to engage a notched or recessed portion 34 defined upon the tension lever 24 so as to retain the lat-ter at its second, lower operative or active position. The tension lever 24 is normally spring-biased toward its first, upper, inoperative or inactive position, and tension lever lock lever 30 may be similarly spring-biased toward its nor-mal upstAn~ing position so as to properly engage the tension lever 24 when the latter is disposed at either one of its first, upper, inoperative/inactive or second, lower, opera-tive/active positions.
As is also known in the art, the tool 10 further comprises a seal lever 36 which, in a manner similar to that ' ~ CA 02217063 1997-09-30 .
of tension lever 24, is pivotably mounted upon an upstanding bracket 38 so as to be movable between a first, upper, inope-rative or inactive position, as illustrated, and a second, lower, operative or active position, not illustrated, at which the seal lever 36 activates another suitable air valve, not shown, which controls the operation of another air motor, also not shown, for driving the sealing m~h~ni~ of the tool 10 so as to crimpingly secure the metal seal member onto the overlapped portions of the strapping. As has been noted here-inbefore, the sealing operation, as initiated by movement ofthe se81 lever 36 from its first, upper, inoperative or in-active position to its second, lower, operative or active po-sition, is implemented after a predetermined amount of ten-sion has been impressed upon the strapping by means of the lS feedwheel 12 and as indicated to the operator by means of the stalling of the air motor 22 and feedwheel 12. In addition, it has also been noted that the seal lever 36 and the tension lever lock lever 30 are also conventionally ~e~h~n; cally in-terrelated or interconnected together by means of a suitable cam ech~n; sm, not shown, whereby when the seal lever 36 is depressed downwardly so as to be moved from its illustrated first, upper, inoperative or inactive position to its non-illustrated second, lower, operative or active position, the tension lever lock lever 30 is cammed away from its position, at which it is engaged with the tension lever 24 so as to maintain the latter at its second, lower, operative or active position, to a position at which the tension lever 24 is re-leased and permitted to return from its second, lower, opera-tive or active position to its first, upper, inoperative or inactive position.
As a result of such movement of the tension lever 24, activation or operation of the air motor 22 for feedwheel 12 is terminated whereby tensioning of the strapping is stop-ped. Consequently, during the performance of the sealing ope-ration by means of the tool's sealing -ch~nism as initiated or activated by means of the seal lever 36, and its associat-.
ed air drive motor, not shown, and before completion of such sealing operation, and due to the fact that the strapping had necessarily been subjected to such a high degree of tension by the feedwheel 12 in order to properly tension or load the S strapping being disposed about the particular article, load, package, or the like being strapped, due further to the addi-tional fact that the strapping exhibits a predetermined amount of inherent resiliency, and due to the elapsed time which elapses between the termination of the feedwheel motor drive and the completion of the sealing operation, the ten-sion level or value achieved by the feedwheel motor drive at the time of stalling of such feedwheel motor drive and initi-ation of the sealing operation is not able to be maintained and accordingly the amount of tension within the tensioned strapping encircled about the particular article, load, pack-age, or the like being strapped is undesirably reduced to a level which results in the strapping exhibiting a degree of fixation which is not as secure as is desired.
In accordance then with the teachings of the pre-sent invention, the seal lever 36 is provided with an inte-gral, laterally projecting or transversely extending tab, tang member, or ear 40 which has its distal free end portion thereof disposed above the tension lever 24. Consequently, when the seal lever 36 is depressed and moved pivotably down-wardly during the initiation of a sealing operation, the arc-uate movement of the tab or ear 40 will be such that such tab or ear 40 will encounter and engage an upper surface portion of the tension lever 24. Therefore, despite the fact that the aforenoted interconnecting or interlocking cam ~~h~nism de-fined between the seal lever 36 and the tension lever locklever 30 normally results in the tension lever lock lever 30 being disengaged from its interlocked position or state with respect to the tension lever 24 so as to permit the tension lever 24 to be move away from its second, lower, operative or active position and toward its first, upper, inoperative or inactive positlon when the seal lever 36 is depressed down-. ' .
wardly so as to commence a sealing operation, such downward depression of the seal lever 30 now results in the integral tab or ear 40 thereof physically encountering and engaging the tension lever 24 such that the tension lever 24 cannot return to its normal or first, upper inoperative or inactive position. Therefore, the tension lever 24 effectively remains in its second, lower, operative ~r active position whereby the tension lever 24 still activates or opens its operatively associated air control valve, not shown, which permits com-pressed air to operate air motor 22 which, in turn, and bymeans of the suitable gearing housed within gear housing 16, drives the strap tensioning feedwheel 12.
As a result of such retention of the tension lever 24 at its second, lower, operative or active position and the continuance of the drive of feedwheel 12 during the initia-tion and performance of the sealing operation, the tension, originally developed within the strapping by means of the feedwheel 12 during the tensioning phase of the strapping op-eration, is now able to be fully maintained within the strap-ping, durin~l the sealing phase of the strapping operation, atthe same tens-on level impressed upon or developed within the strapping, during the tensioning phase of the strapping ope-ration, when the air motor 22 driving the feedwheel 12 under-went stalling because the stall condition attendant the driv-ing of the feedwheel 12 is effectively maintained. Therefore,the strapping does not experience any slackening or loss of tension and the strapping can therefore be secured, fastened, or bound about the particular article, load, package, or the like with the proper level of tension effectively preserved therein. Obviously, when the seal lever 36 is released so as to permit the same to return to its normal, first, upper, in-operative or inactive position upon the termination of the sealing operation, the tension lever 24 is likewise permitted to return to its normal, first, upper, inoperative or inact-ive position as a result of the disengagement of the seallever tang or ear member 40 therefrom. ~Consequently, it is , appreciated that the tensioning phase of the strapping opera-tion is not prematurely terminated, termination of the ten-sioning pha~e of the strapping operation is effectively de-layed until after the sealing operation has been completed, and that the tensioning and sealing operations are terminated substantially simultaneously.
It is to be further appreciated that the aforenoted release or disengagement of the tension lever 24 from its second, lower, operative or active position, as a result of the camming away of the tension lever lock lever 30 by the cam rechAnism defined between the seal lever 36 and the ten-sion lever lock lever 30, cannot be viably prevented by elim-inating the cam mechanism defined between the seal lever 36 and the tension lever lock lever 30 because the cam ~e~hAn;sm serves an important operational role within the overall strapping operation. If such cam mechanism did not exist, then once the tension lever 24 was depressed and moved to its second, lower, operative or active position, and when the seal lever 36 was subsequently moved to its second, lower, operative or active position so as to initiate the sealing phase of the strapping opertion, upon termination of the sealing phase of the strapping operation when the seal lever 36 is released from its second, lower, operative or active position so as to return to its first, upper, inoperative or inactive position, the tension lever 24 would nevertheless be disposed and retained at its second, lower, operative or act-ive position which would then necessitate manual release or disengagement of the tension lever 24 from such operative or active pc~ition. In accordance with the present invention, such release or disengagement of the tension lever 24 occurs, in effect, automatically and simultaneously with the release or movement of the seal lever 36 from its second, lower, ope-rative or active position to its first, upper, inoperative or inact1ve position because the tension lever 24 has been pre-viously released or disengaged from the tension lever locklever 30 as a result of the tension lever lock lever 30 hav-ing be~en moved away or released from its upright illustrated position by means of the aforenoted cam ~e~h~n;sm~
Thus, it may be seen that the present invention comprises an advancement in the strapping art to the effect that by means of the present invention, the deficiencies or drawbacks characteristic of the prior art or conventional strapping sealing systems are overcome and the problems re-sulting therefrom appropriately rectified. In particular, by means of the present invention, the tensioning phase of the strapping operation is not prematurely terminated and the termination of such tensioning phase of the strapping opera-tion is, in effect, delayed such that the tension level, pre-viously present within the strapping at the conclusion of the tensioning phase of the strapping as indicated to the operat-lS or by means of the stalling of the feedwheel drive motor, isnot reduced. In particular, the tensioning phase of the strapping operation is positively and effectively continued until the sealing phase of the strapping operation has been completed. In this manner, the resultant tension developed within the 5trapping during the tensioning phase of the strapping operation is effectively preserved and is therefore substantially greater than the tension characteristic of con-ventional strapping secured about articles, loads, packages, or the like. In addition, such increased resultant tension level within the strapping facilitates severance of the strapping when the cutting implement of the strapping tool severs the sealed strapping from the supply of strapping ma-terial disposed upon a reel of strapping material upon con-clusion of the sealing phase of the strapping operation.
Obviously, many modifications and variations of the present invention are possible in light of the above teach-ings. It is therefore to be understood that within the scope of the appended claims, the present invention may be practic-ed otherwise than as specifically described herein.
.
TENSION RELEASE DELAY MEC~ANISM FOR MANUAL
PNEUMATIC SEAL TYPE STRAPPING TOOL
FIELD OF THE INVENTION
The present invention relates generally to pneumat-ically operable tools for crimping or applying a metal seal about the overlapping portions of a tensioned loop of strap-ping which has been encircled about an object or article to be strapped for ensuring the integrity of the object or arti-cle during storage or transportation thereof, and more par-ticularly, to a pneumatically operable strapping tool whichis provided with a new and improved interlock ~~h~n; sm de-fined between the tension and seal levers of the strapping tool so as to ensure the maintenance of a proper tension lev-el within the strapping during the sealing operation.
~3ACKGROUND OF THE INVENTION
Pneumatically operable tools, for crimping or apply-ing metal seals about the overlapping portions of a tensioned loop of strapping which has been encircled about an object or article to be strapped, are of course well-known in the art.
One early type of conventional pneumatically operable tool of the aforenoted type is disclosed within United States Patent 3,552,450 which issued to Larry Plunkett and is assigned to the assignee of the present patent application. Other more current types of conventional pneumatically operable strap-ping tools are disclosed within the SIGNODE Operation, Partsand Safety Manual for the PNSC-12/58/34 Push Type Combination ; -. CA 02217063 1997-09-30 Strapping Tool, and within the ORGAPACX Operations Manual for the CR 25 A Steel Strapping Tool.
As can be readily appreciated from the ORGAPACK
Operations Manual, and as more particularly noted and deR-cribed on Pages 7 and 8 thereof, the tool comprises a green-colored tension lever and a yellow-colored seal lever. As is known, each of these actuating levers operate or control in-ternal valves which, in turn, operate or control pneumatic-ally operable motors for operating or actuating the tension and sealing mechanisms. In utilizing the strapping tool in order to apply or secure tensioned strapping about an article or object to be strapped, the strapping is initially drawn from a supply reel of strapping material, the free end of the strapping is inserted through the uncrimped seal member, and the loop of strapping is then encircled about the article or object to be strapped. After manually tightening the loop of strapping about the article or object so as to remove a large portion of slack within the looped strapping, an overlapped end of the strapping is inserted into the feedwheel -ch~nism of the strapping tool. The green-colored tension lever is then actuated so as to actuate one of the internal valves which, in turn, actuates the air motor operatively associated with the feedwheel mechanism. The latter tensions the strap-ping, disposed about the article or object being strapped, to a predetermined tension level which will be indicated to the operator as a result of the feedwheel motor drive stalling.
Upon stalling of the feedwheel motor drive, the yellow seal lever is then actuated so as to similarly actuate the other one of the internal valves which, in turn, actuates the air motor operatively associated with the sealing jaw me~h~nism so as to perform the seal crimping, sealing, and strap cut-ting operations.
While the aforenoted type of prior art strapping tools operate quite satisfactorily and have of course been quite successful in the marketplace, such tools do exhibit some operational drawbacks or deficiencies which, if properly ~ ' CA 02217063 1997-09-30 t addressed, would provide strapping which is more secure when such strapp ng is disposed about the objects, loads, articles or packages~being s~rapped with such strapping. More particu-larly, the tension and seal levers of such pneumatically ope-S rated strapping tools are interrelated or re~hAnically inter-connected with respect to each other by an internal cam mech-anism. Consequently, when the seal lever is actuated after the tension or feedwheel motor drive stalls, the depression of the seal lever, through means of such interrelated or me-chanically interconnected cam ~echAnism, permits the tensionlever to be released from its actuated position. Accordingly, actuation of the tension or feedwheel motor drive, through means of the aforenoted internal pneumatic valving, is termi-nated. However, due to the fact that the strapping has neces-lS sarily been subjected to such a high degree of tension by thefeedwheel motor drive in order to properly tension or load the strapping being disposed about the particular article, object, or package being strapped, due to the additional fact that t}.e strapping exhibits a predetermined amount of inher-ent resiliency, and due to the passage of a predeterminedamount of time, however small, which elapses between the ter-mination of the tension or feedwheel motor drive and the ac-tuation and completion of the sealing operation, the tension level or value achieved by the tension or feedwheel motor drive at the time of stalling is not able to be maintained and accordingly the amount of tension within the tensioned strapping is undesirably reduced to a level which renders the strapping, disposed about the article, load, or package, to exhibit a degree of fixation which is not as secure as is de-sired.
Therefore, there is a need in the art, to which thepresent invention is addressed, for a pneumatically operable strapping tool wherein the tension level, previously develop-ed within the strapping during the tensioning phase of the strapping operation, is able to be fully maintained within the strapping, at the same tension level and without any re-~ I
duction in such tension level, during the sealing phase of the strapping operation even though actuation of the seal lever has caused the internal cammed interlock mechanism de-fined between the seal and tension levers to disengage the tension lever from its actuated and locked position.
,~
OBJECTS OF THE I~VENTION
Accordingly, it is an object of the present inven-tion to provide a new and improved pneumatically operable strapping tool for fastening and securing strapping about ar-ticles, loads, packages, or the like, in order to securelyfasten or bind the same for storage or transportation pur-poses.
Another object of the present invention is to pro-vide a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like, which does not exhibit the ope-rational drawbacks or deficiencies of the prior art pneumat-ically operable strapping tools for fastening and securing strapping about articles, loads, packages, or the like as has been noted hereinbefore.
A further object of the present invention is to provide a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like, wherein the tension level, pre-viously developed within the strapping during the tensioningphase of the strapping operation, is able to be fully main-tained within the strapping, at the same tension level and without any reduction in such tension level, during the seal-ing phase of the strapping operation even though actuation of the tension lever has been disengaged or released from its actuated and locked position as a result of the actuation of the seal lever and the operation of the cam mechanism inter-connecting the seal lever and the tension lever.
CA 022l7063 l997-09-30 SUMMARY OF T~F INV~NTION
The foregoing and other objectives are achieved in accordance with the present invention through the provision of a new and improved pneumatically operable strapping tool, for fastening and securing strapping about articles, loads, packages, or the like in order to securely fasten or bind the same for storage or transportation purposes, wherein the seal lever is provided with an outwardly projecting or transverse-ly extending tab or tang member which is adapted to extend over or above the tension lever. Consequently, when the seal lever is depressed and moved downwardly so as to initiate the sealing operation, the tab or tang member of the seal lever will engage an external portion of the tension lever and thereby maintain the tension lever in its depressed or down-ward po5ition.
In this manner, despite the internal release ordisengagement of the tension lever from its downwardly ac-tuated and locked position as a result of the engagement of an associated tension lever lock lever by means of an intern-al cam mechanism defined between the seal lever and the ten-sion lever lock lever, the tension lever is physically main-tained in its downward depressed position such that the in-ternal pneumatic or air control valve, operatively associated therewith for controlling the air motor driving the strap-tensioning feedwheel ~chAnism, is nevertheless maintainedactivated or open so as to conduct a supply of compressed air to the air motor driving the feedwheel ?~hani . Therefore, the feedwheel ~~hanism is maintained active and in its drive state, and consequently, the predetermined tension level pre-viously developed within the strapping by the feedwheel mech-anism during the tensioning phase of the strapping operation is now able to be fully maintained within the strapping, at the same tension level and without any reduction in such ten-sion le~,el, during the sealing phase of the strapping opera-tion.
\ -5-~ ' ~
~RIEF DESCRIPTION OF THE DRAWING
~ Various other objects, features, and attendant ad-vantages of the present invention will be more fully appreci-ated from the following detailed description of the present invention when considered in conjunction with the accompany-ing drawing wherein: .~
The SOLE FIGURE is a perspective view of the new and improved pneumatically operable strapping tool, for fas-tening and securing strapping about articles, loads, pack-ages, or the like in order to securely fasten or bind thesame for storage or transportation purposes, constructed in accordance with the teachings of the present invention and showing the various cooperative parts thereof.
DETAI~ED DESCRIPTION OF THE PREFERRED EM~ODIMENT
R~ferring r.ow to the drawing, the new and improved pneumatically operable strapping tool, for fastening and se-curing strapping about articles, loads, packages, or the like in order to securely fasten or bind the same for storage or transportation purposes, is generally indicated by the refe-rence character 10. The tool 10 conventionally comprises a feedwheel 12, which is provided for drivably engaging one of the overlapped ends of the strapping encircled about the ar-ticle, load, package, or the like to be strapped, and the feedwheel 12 is adapted to be mounted upon a transversely extending feedwheel drive shaft 14 which projects laterally outwardly from a feedwheel gear housing 16. The feedwheel 12 is provided with an axial through-bore 18 which has a hexag-onal configuration, and feedwheel drive shaft 14 is provided with a section 20 wherein the external configuration of sec-tion 20 is hexagonal such that the feedwheel drive shaft 14is drivingly mated with feedwheel 12 as a result of the feed-'~ CA 02217063 1997-09-30 .
wheel drive shaft section 20 being accommodated within the hexagonally shaped through-bore 18 of the feedwheel 12. An air motor 2' has suitable drive components thereof, not shown, operàtively connected to suitable gear components, not shown, of the gear housing 16 so as to transmit rotary drive from the air motor 22 to the feedwheel 12 through means of the gear housing 16 and feedwheel drive shaft 14.
The strapping tool 10 further comprises a tension lever 24 which is pivotably mounted upon an upstanding brack-et 26 by means of a suitable pivot pin 28 such that the ten-sion lever 24 is pivotably movable between a first, upper, inoperative or inactive position as illustrated, and a sec-ond, lower operative or active position, not illustrated, at which the tension lever 24 actuates a suitable air valve, not shown, which is fluidically connected to the air motor 22 so as to permit the drive thereof to be transmitted to the gear housing 16 and feedwheel 12. An upstanding tension lever lock lever 30 is pivotably mounted upon the tool 10 such that a first shoulder portion 32 thereof engages the tension lever 24 when the latter is disposed at its first, upper, inopera-tive or inactive position, and the tension lever lock lever 30 is also provided with a second shoulder portion, not shown, which is disposed vertically beneath the first should-er portion 32 in a spaced arrangement with respect thereto and which is adapted to engage a notched or recessed portion 34 defined upon the tension lever 24 so as to retain the lat-ter at its second, lower operative or active position. The tension lever 24 is normally spring-biased toward its first, upper, inoperative or inactive position, and tension lever lock lever 30 may be similarly spring-biased toward its nor-mal upstAn~ing position so as to properly engage the tension lever 24 when the latter is disposed at either one of its first, upper, inoperative/inactive or second, lower, opera-tive/active positions.
As is also known in the art, the tool 10 further comprises a seal lever 36 which, in a manner similar to that ' ~ CA 02217063 1997-09-30 .
of tension lever 24, is pivotably mounted upon an upstanding bracket 38 so as to be movable between a first, upper, inope-rative or inactive position, as illustrated, and a second, lower, operative or active position, not illustrated, at which the seal lever 36 activates another suitable air valve, not shown, which controls the operation of another air motor, also not shown, for driving the sealing m~h~ni~ of the tool 10 so as to crimpingly secure the metal seal member onto the overlapped portions of the strapping. As has been noted here-inbefore, the sealing operation, as initiated by movement ofthe se81 lever 36 from its first, upper, inoperative or in-active position to its second, lower, operative or active po-sition, is implemented after a predetermined amount of ten-sion has been impressed upon the strapping by means of the lS feedwheel 12 and as indicated to the operator by means of the stalling of the air motor 22 and feedwheel 12. In addition, it has also been noted that the seal lever 36 and the tension lever lock lever 30 are also conventionally ~e~h~n; cally in-terrelated or interconnected together by means of a suitable cam ech~n; sm, not shown, whereby when the seal lever 36 is depressed downwardly so as to be moved from its illustrated first, upper, inoperative or inactive position to its non-illustrated second, lower, operative or active position, the tension lever lock lever 30 is cammed away from its position, at which it is engaged with the tension lever 24 so as to maintain the latter at its second, lower, operative or active position, to a position at which the tension lever 24 is re-leased and permitted to return from its second, lower, opera-tive or active position to its first, upper, inoperative or inactive position.
As a result of such movement of the tension lever 24, activation or operation of the air motor 22 for feedwheel 12 is terminated whereby tensioning of the strapping is stop-ped. Consequently, during the performance of the sealing ope-ration by means of the tool's sealing -ch~nism as initiated or activated by means of the seal lever 36, and its associat-.
ed air drive motor, not shown, and before completion of such sealing operation, and due to the fact that the strapping had necessarily been subjected to such a high degree of tension by the feedwheel 12 in order to properly tension or load the S strapping being disposed about the particular article, load, package, or the like being strapped, due further to the addi-tional fact that the strapping exhibits a predetermined amount of inherent resiliency, and due to the elapsed time which elapses between the termination of the feedwheel motor drive and the completion of the sealing operation, the ten-sion level or value achieved by the feedwheel motor drive at the time of stalling of such feedwheel motor drive and initi-ation of the sealing operation is not able to be maintained and accordingly the amount of tension within the tensioned strapping encircled about the particular article, load, pack-age, or the like being strapped is undesirably reduced to a level which results in the strapping exhibiting a degree of fixation which is not as secure as is desired.
In accordance then with the teachings of the pre-sent invention, the seal lever 36 is provided with an inte-gral, laterally projecting or transversely extending tab, tang member, or ear 40 which has its distal free end portion thereof disposed above the tension lever 24. Consequently, when the seal lever 36 is depressed and moved pivotably down-wardly during the initiation of a sealing operation, the arc-uate movement of the tab or ear 40 will be such that such tab or ear 40 will encounter and engage an upper surface portion of the tension lever 24. Therefore, despite the fact that the aforenoted interconnecting or interlocking cam ~~h~nism de-fined between the seal lever 36 and the tension lever locklever 30 normally results in the tension lever lock lever 30 being disengaged from its interlocked position or state with respect to the tension lever 24 so as to permit the tension lever 24 to be move away from its second, lower, operative or active position and toward its first, upper, inoperative or inactive positlon when the seal lever 36 is depressed down-. ' .
wardly so as to commence a sealing operation, such downward depression of the seal lever 30 now results in the integral tab or ear 40 thereof physically encountering and engaging the tension lever 24 such that the tension lever 24 cannot return to its normal or first, upper inoperative or inactive position. Therefore, the tension lever 24 effectively remains in its second, lower, operative ~r active position whereby the tension lever 24 still activates or opens its operatively associated air control valve, not shown, which permits com-pressed air to operate air motor 22 which, in turn, and bymeans of the suitable gearing housed within gear housing 16, drives the strap tensioning feedwheel 12.
As a result of such retention of the tension lever 24 at its second, lower, operative or active position and the continuance of the drive of feedwheel 12 during the initia-tion and performance of the sealing operation, the tension, originally developed within the strapping by means of the feedwheel 12 during the tensioning phase of the strapping op-eration, is now able to be fully maintained within the strap-ping, durin~l the sealing phase of the strapping operation, atthe same tens-on level impressed upon or developed within the strapping, during the tensioning phase of the strapping ope-ration, when the air motor 22 driving the feedwheel 12 under-went stalling because the stall condition attendant the driv-ing of the feedwheel 12 is effectively maintained. Therefore,the strapping does not experience any slackening or loss of tension and the strapping can therefore be secured, fastened, or bound about the particular article, load, package, or the like with the proper level of tension effectively preserved therein. Obviously, when the seal lever 36 is released so as to permit the same to return to its normal, first, upper, in-operative or inactive position upon the termination of the sealing operation, the tension lever 24 is likewise permitted to return to its normal, first, upper, inoperative or inact-ive position as a result of the disengagement of the seallever tang or ear member 40 therefrom. ~Consequently, it is , appreciated that the tensioning phase of the strapping opera-tion is not prematurely terminated, termination of the ten-sioning pha~e of the strapping operation is effectively de-layed until after the sealing operation has been completed, and that the tensioning and sealing operations are terminated substantially simultaneously.
It is to be further appreciated that the aforenoted release or disengagement of the tension lever 24 from its second, lower, operative or active position, as a result of the camming away of the tension lever lock lever 30 by the cam rechAnism defined between the seal lever 36 and the ten-sion lever lock lever 30, cannot be viably prevented by elim-inating the cam mechanism defined between the seal lever 36 and the tension lever lock lever 30 because the cam ~e~hAn;sm serves an important operational role within the overall strapping operation. If such cam mechanism did not exist, then once the tension lever 24 was depressed and moved to its second, lower, operative or active position, and when the seal lever 36 was subsequently moved to its second, lower, operative or active position so as to initiate the sealing phase of the strapping opertion, upon termination of the sealing phase of the strapping operation when the seal lever 36 is released from its second, lower, operative or active position so as to return to its first, upper, inoperative or inactive position, the tension lever 24 would nevertheless be disposed and retained at its second, lower, operative or act-ive position which would then necessitate manual release or disengagement of the tension lever 24 from such operative or active pc~ition. In accordance with the present invention, such release or disengagement of the tension lever 24 occurs, in effect, automatically and simultaneously with the release or movement of the seal lever 36 from its second, lower, ope-rative or active position to its first, upper, inoperative or inact1ve position because the tension lever 24 has been pre-viously released or disengaged from the tension lever locklever 30 as a result of the tension lever lock lever 30 hav-ing be~en moved away or released from its upright illustrated position by means of the aforenoted cam ~e~h~n;sm~
Thus, it may be seen that the present invention comprises an advancement in the strapping art to the effect that by means of the present invention, the deficiencies or drawbacks characteristic of the prior art or conventional strapping sealing systems are overcome and the problems re-sulting therefrom appropriately rectified. In particular, by means of the present invention, the tensioning phase of the strapping operation is not prematurely terminated and the termination of such tensioning phase of the strapping opera-tion is, in effect, delayed such that the tension level, pre-viously present within the strapping at the conclusion of the tensioning phase of the strapping as indicated to the operat-lS or by means of the stalling of the feedwheel drive motor, isnot reduced. In particular, the tensioning phase of the strapping operation is positively and effectively continued until the sealing phase of the strapping operation has been completed. In this manner, the resultant tension developed within the 5trapping during the tensioning phase of the strapping operation is effectively preserved and is therefore substantially greater than the tension characteristic of con-ventional strapping secured about articles, loads, packages, or the like. In addition, such increased resultant tension level within the strapping facilitates severance of the strapping when the cutting implement of the strapping tool severs the sealed strapping from the supply of strapping ma-terial disposed upon a reel of strapping material upon con-clusion of the sealing phase of the strapping operation.
Obviously, many modifications and variations of the present invention are possible in light of the above teach-ings. It is therefore to be understood that within the scope of the appended claims, the present invention may be practic-ed otherwise than as specifically described herein.
Claims (18)
1. A strapping tool for securing strapping about an article to be strapped, comprising:
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to prevent said tension lever from deactivating said means for driving said feedwheel during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to prevent said tension lever from deactivating said means for driving said feedwheel during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
2. The strapping tool as set forth in Claim 1, wherein:
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
3. The strapping tool as set forth in Claim 2, wherein:
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
4. The strapping tool as set forth in Claim 1, wherein:
said strapping tool comprises a pneumatically operable strapping tool.
said strapping tool comprises a pneumatically operable strapping tool.
5. The strapping tool as set forth in Claim 4, wherein:
said means for driving said feedwheel comprises an air motor.
said means for driving said feedwheel comprises an air motor.
6. The strapping tool as set forth in Claim 3, further comprising:
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
7. A strapping tool for securing strapping about an article to be strapped, comprising:
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to cause said tension lever to maintain said means for driving said feedwheel in an activated state during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to cause said tension lever to maintain said means for driving said feedwheel in an activated state during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
8. The strapping tool as set forth in Claim 7, wherein:
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
9. The strapping tool as set forth in Claim 8, wherein:
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
10. The strapping tool as set forth in Claim 7, wherein:
said strapping tool comprises a pneumatically operable strapping tool.
said strapping tool comprises a pneumatically operable strapping tool.
11. The strapping tool as set forth in Claim 10, wherein:
said means for driving said feedwheel comprises an air motor.
said means for driving said feedwheel comprises an air motor.
12. The strapping tool as set forth in Claim 9, further comprising:
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
13. A strapping tool for securing strapping about an article to be strapped, comprising:
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to prevent said tension lever from deactivating said means for driving said feedwheel, and to cause said tension lever to maintain said means for driving said feedwheel in an activated state during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
a feedwheel for engaging a portion of strapping and applying tension forces to said strapping so as to tension said strapping, disposed about an article to be strapped, during a tensioning phase of a strapping operation;
means for driving said feedwheel so as to cause said feedwheel to apply said tension forces to said strapping, disposed about an article to be strapped, during said tensioning phase of said strapping operation;
a tension lever movably mounted upon said tool for activating said means for driving said feedwheel during said tensioning phase of said strapping operation;
a seal lever movably mounted upon said tool for activating a sealing mechanism for applying a seal member to said tensioned strapping, disposed about an article to be strapped, during a sealing phase of said strapping operation;
and means interconnecting said seal lever and said tension lever so as to prevent said tension lever from deactivating said means for driving said feedwheel, and to cause said tension lever to maintain said means for driving said feedwheel in an activated state during said sealing phase of said strapping operation whereby driving of said feedwheel during said sealing phase of said strapping operation is continued so as to continue the application of tension forces to said strapping during said sealing phase of said strapping operation.
14. The strapping tool as set forth in Claim 13, wherein:
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
said means interconnecting said seal lever and said tension lever comprises an ear member integral with said seal lever for engaging said tension lever when said seal lever is moved to a position at which said seal lever activates said sealing mechanism.
15. The strapping tool as set forth in Claim 14, wherein:
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
said tension lever is pivotably mounted upon said tool between a first inoperative position at which said tension lever does not operate said means for driving said feedwheel, and a second operative position at which said tension lever activates said means for driving said feedwheel;
said seal lever is pivotably mounted upon said tool between a first inoperative position at which said seal lever does not operate said sealing mechanism, and a second operative position at which said seal lever activates said sealing mechanism; and said ear member projects laterally outwardly from said seal lever so as to engage said tension lever when said seal lever is moved from said first inoperative position to said second operative position so as to maintain said tension lever at said second operative position.
16. The strapping tool as set forth in Claim 13, wherein:
said strapping tool comprises a pneumatically operable strapping tool.
said strapping tool comprises a pneumatically operable strapping tool.
17. The strapping tool as set forth in Claim 16, wherein:
said means for driving said feedwheel comprises an air motor.
said means for driving said feedwheel comprises an air motor.
18. The strapping tool as set forth in Claim 15, further comprising:
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
a tension lever lock lever for engaging said tension lever and maintaining said tension lever at said second operative position, and interconnected to said seal lever such that when said seal lever is moved to said second operative position, said tension lever lock lever is disengaged from said tension lever so as to permit said tension lever to be released from said second operative position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73696396A | 1996-10-25 | 1996-10-25 | |
| US08/736,963 | 1996-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2217063A1 true CA2217063A1 (en) | 1998-04-25 |
Family
ID=24962048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002217063A Abandoned CA2217063A1 (en) | 1996-10-25 | 1997-09-30 | Tension release delay mechanism for manual pneumatic seal type strapping tool |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0838400A1 (en) |
| JP (1) | JPH10129612A (en) |
| KR (1) | KR19980033272A (en) |
| AU (1) | AU4098397A (en) |
| CA (1) | CA2217063A1 (en) |
| MX (1) | MX9708148A (en) |
| TW (1) | TW379181B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9254932B2 (en) * | 2008-04-23 | 2016-02-09 | Signode Industrial Group Llc | Strapping device with an electrical drive |
| US10518914B2 (en) | 2008-04-23 | 2019-12-31 | Signode Industrial Group Llc | Strapping device |
| US11999516B2 (en) | 2008-04-23 | 2024-06-04 | Signode Industrial Group Llc | Strapping device |
| KR101108785B1 (en) | 2009-04-17 | 2012-03-16 | 김상곤 | The transport device of the bending device |
| CN108247580B (en) * | 2018-04-09 | 2024-03-22 | 河北科技大学 | Novel expansion embedded part air gun |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1054034A (en) * | 1900-01-01 | |||
| US3552450A (en) | 1968-12-10 | 1971-01-05 | Signode Corp | Pneumatic seal-crimping tool for tensioned strapping loops |
| CH637587A5 (en) * | 1979-05-11 | 1983-08-15 | Borbe Wanner Ag | DEVICE FOR STRAPPING OBJECTS WITH A PLASTIC STRAP. |
| EP0664256B1 (en) * | 1994-01-24 | 1997-03-05 | Orgapack Ag | Tensioning and closing tool for securing a thermoplastic strapping around an object |
| US5518043A (en) * | 1995-01-09 | 1996-05-21 | Illinois Tool Works | Readily assembled and disassembled, modular, pneumatically powered strapping tool |
-
1997
- 1997-09-30 CA CA002217063A patent/CA2217063A1/en not_active Abandoned
- 1997-10-15 AU AU40983/97A patent/AU4098397A/en not_active Abandoned
- 1997-10-18 TW TW086115388A patent/TW379181B/en active
- 1997-10-21 EP EP97308365A patent/EP0838400A1/en not_active Withdrawn
- 1997-10-22 MX MX9708148A patent/MX9708148A/en not_active IP Right Cessation
- 1997-10-24 KR KR1019970055883A patent/KR19980033272A/en not_active Application Discontinuation
- 1997-10-27 JP JP9294339A patent/JPH10129612A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0838400A1 (en) | 1998-04-29 |
| AU4098397A (en) | 1998-04-30 |
| JPH10129612A (en) | 1998-05-19 |
| KR19980033272A (en) | 1998-07-25 |
| MX9708148A (en) | 1998-04-30 |
| TW379181B (en) | 2000-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |