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, May 10, 1938.‘ ' "H. c. BRISTOLL Er AL 2,117,015 STRAP STRETCHING TOOL Filed June 25, 1936 2 Sheets-Sheet l H4RP/S0N GER/57791.1, , ROBERT VSANFORD as‘, HOWARD C.’ DOOLITTLE' May 10, 1938. H. ¢_ Bms-roLL ET AL _ 2,117,015 STRAP STRETCHING TOOL Filed June 25, 1936 2 Sheets-Sheet 2 Fig.4 60 l gwue/wbo'b MPH/JON 6.‘ BRISTOLL ROBERT VJANFORD HQWARD G170 LITTLE V w, ’ - WM Patented May 10, 2,117,015 UNITED STATES PATENT OFFICE 2,117,015 srmr sranrcmnc} TQOL Harrison 0. Bristoil, New Britain, Robert V. San ford, Hartford, and Howard C. Doolittle, New Britain, Conn., assignors to The Stanley Works, New Britain, Court, a corporation of Connecti ciit "Application June 25, 1936, Serial No. 87,144 , , . 12 Claims. This invention relates to a device for stretch ing straps or bands’ about packages, boxes, or other articles. , The aim of the invention is to provide a more ‘5 simple and effective strap stretching tool which is relatively light in 'weight, may be easily han died, and conveniently operated; which is very ((1254-46) ‘ erally aligned longitudinally of the tool, but in clined ‘upwardly and rearwardly as later described. A strap lock in ‘the form of a dog It cooperating with a laterally extending lug I5 is carried by the frame for the purpose of securing one end of a. strap I0 to‘the frame; The frame has a longitudinal bore extending‘ axially through simple and compact in construction, and capable the handle and slidably accommodating a rack of being constructed at low cost; and which is bar I 6, the forward end of which ,is provided 10 strong and durable. ‘ t A further aim of the invention is to provide a tool of this character with an improved arrange ment whereby the overlapping strap ends may be held during the tensioning operation a sufficient 15 distance away from the package being strapped to permit of the positioning of the seal on the strap ends and accommodating the jaws of a sealing instrumentality during the sealing opera with a head I‘! having a foot [8 with which ~co 10 operates a strap lock in the form of a dog I9 for securing the other end of the strap to' the head. An operating hand lever 20, pivotally connected to the body through a shaft 2i extending trans versely through the frame, is ratchet connected 15 to the rack bar so that when the hand lever is operated, the rack bar is axially moved and the frame and head move relatively away from each ‘ tion, this arrangement being of particular ad other to pull the respective forwardly and rear 20 vantage when applying the straps to rounded wardly projecting strap ends ‘Illa and lllb in op 20 surfaces. posite directions and tension strap l0 about an Other objects will be in part obvious and in article being handed. A supporting foot 22 is part pointed out more in detail hereinafter. located beneath frame I 2 substantially in the Our invention accordingly consists in the fea plane of foot i8 to aid in supporting the tool 25 tures of construction, combination of elements, ' when employed on a flat surface. As shown in , and arrangement of parts which will be exempli Fig. 1, foot 22 is so positioned with reference to ?ed in the ‘construction hereinafter set forth and foot i8 that the tool may be supported at a slight the scope of the application which will be indi angle whereby an operator will have ample room cated in the appended claims. for his ?ngers between the handle and the article In the accompanying drawings illustrating one being banded. 30 30 embodiment of our invention and wherein like . The operative connection between lever 20 and parts are indicated by like numerals: the rack bar It includes a pinion 23 journalled Figure 1 is 'a side elevation of our invention on shaft 2| and meshing with the teeth of the showing its application to tensioning a strap rack bar. ‘ As shown in Fig. 1, the teeth on the 35 around a box or similar object having a ?at face; rack bar terminate in spaced relation to the ends 35 Fig. 2 is an enlarged fragmentary sectional view of the bar, thereby limiting the maximum extent ' illustrating the ratchet feed mechanism associ of rack bar movement in both directions. Car ated with the tensioning device; ried by lever 20 adjacent to pinion 2| is a driving Fig. 3 is an enlarged fragmentary plan view pawl 24 pivotally mounted on a transverse pin 25 40 showing the forward clamping mechanism and supported in a forked portion of the forward end 40 the strap supporting means associated therewith; of the lever and spring pressed into driving en Fig. 4 is a view taken substantially along the gagement as shown. The nose of pawl 24 is so lines H of Fig. 3 and showing a transverse arranged that when the lever is angularly moved, section through the forward clamping mecha in one direction, rearwardly and downwardly in the present instance, the pinion is rotated (clock 45 45 nism; Fig. 5 is a view taken substantially along the wise in Fig. 2) to move the rack bar outwardly lines 5—-5 of Fig. 3 and showing a longitudinal from frame l2, and when the lever is swung in section through the forward strap supporting the opposite direction (upwardly and forwardly) members and associated parts; and during an inoperative stroke, pawl 24 will ratchet 50 Fig. 6 is a fragmentary .view of our invention or slide over the pinion teeth without remaining 50 illustrating its application to tensioning a strap in driving engagement therewith. about an article having a rounded contour. For the purpose of preventing retrograde move ment of the rack during the inoperative stroke of the lever and to lock the rack against move In accordance with our invention, we have pro ' vided a strap stretching too] including a frame 55 i2 having a rearwardly extending handle I3 gen ment into the frame during a strap tensioning 55 2 2,117,015 provided. These pawls are pivotally supported of its angular movement therein. The upper curved face 42 cooperates with bore 48 and in on a transverse pin 28 supported by the frame and are spring pressed into engagement with the effect forms a continuation thereof, so that a relatively long bearing is provided for the front operation, a pair of holding pawls 26 and 21 are strap lock, it being observed, particularly from Fig. 4. that the end of the shank from which the arm 31 depends is backed up by the surface 42. Depending arm 31 projects forwardly and in angular relation to a vertical plane including the pinion teeth. These holding pawls are provided with noses arranged to prevent counter-clockwise rotation of pinion 23 (with rei'ercnce'to Fig. 2) so that when the pinion is rotated in a clockwise direction by lever 28 and pawl 24. the pawls 26 10 and 21 will'ratchet over the pinion teeth. As shown in Fig. 2, the noses of pawls 26 and 21 are preferably offset slightly from_ each other to mini mize any retrograde rack movement during a ten sioning operation. . - axis of shank 36 so that a slight counterclockwise 10. movement of dog IS, with reference to Fig. 1, will tend to move the teeth thereon into strap gripping .position and towards the upper face of foot 13. A spring 43 within recess 41 and compressively re ceived between head l1‘ and arm 31 tends to main . After the overlapped strap ends are, sealed to gether. it is desirable to quickly remove the pawls ' tain dog F9 in a strap grippingposition. from operative pinion engagement so that the rack may be retracted into. the frame to any de sired position. To accomplish this, the upper ends of the driving and holding pawls terminate 20 in the respective ears 24'. 26C and 21' which are so positioned with relation to each other that whenever hand lever 20 is shifted to the full extent ‘of .its inoperative movement. these ears 25 will engage, causing all of the pawls to pivotally - swing out of pinion engagement. At this time, the pinion is free to rotate, and the rack l6 and head 11 may be manually positioned wherever desired with respect to the frame. 30 Referring now to the strap locks, dog 14, which is journalled at its upper end on a projecting por is » It is noted that the ?ange 33 is relatively broad in the direction of the length‘of the tool and is relatively thin in vertical direction, this arrange- ' ment being-oi’ advantage in that the ?ange is strong enough to take the strains exerted thereon, while at the same time the. overlapping strap ends forwardly of the head are closely adjacentto each other, thus allowing a seal to be readily placed thereabout._ During the operation of tightening the strap, there is a tendency for the tool to swing or pivot forwardly and upwardly about the "for ward edge of the head l1, and in order to pre vent this, we provide, on the head and rearwardly of the ?ange and at a plane somewhat above the upper surface of the ?ange, a lug 44. The over tion of pin 28, is provided with a serrated bottom lying strap end is required to pass beneath this face forming a multiplicity of closely spaced teeth 31118 Dog I9 is prevented from axial movement in which are urged towards strap supporting foot i5 by a spring 38 compressively received between the one direction by the engagement of the arm 31 dog l4 and the frame. The upper end of the dog against the side of the head. and in the other terminates in a parti-cylindrical surface coaxial direction by means of opposed shoulders 48' and with pin 28 and located beneath an overhanging 41, respectively, on the reduced end 33 of the rack ?ange 32 laterally projecting from the frame. bar and .on shank 36. The shoulder 41 on the shank is provided by a groove 46 cut transversely 40 The underside of the ?ange has a curved face co axial with pin 28 and engaging with the upper within the lower side of the periphery of shank end of dog 14 to offer a support therefor inde pendent of pin 28. Dog 14 extends somewhat rearwardly and in angular relation to a vertical 45 plane including the axis of pin 28 so that when ever the strap end l0b is inserted between the dog and foot IS, a tensioning pull on the strap end towards head i1 will aid in more firmly clamping the strap in position. The strap end iiib may be 50 easily prelocated or disengaged by pulling it to wards the handle end of the frame whereupon dog l4 may be swung out of operative position. The forward strap lock is pivotally supported within the head, I1 which in turn is held on a 55 reduced portion 33 at the forward end of the rack bar by means of a screw 34. A shoulder 35 at the rearward end of head [1 engages the ?at top face of the rack bar to prevent relative angu lar movement between the head and bar. The 60 forward strap lock is made in the form of an integral clamping dog l9 having a relatively long, laterally extending, cylindrical shank 36 from one 36 and intermediate of its ends. This groove has a curved contour adapted to loosely overlie the top peripheral face of reduced portion 33 on the end of the rack bar and terminates at its left 45 hand end in the substantially vertical shoulder 41, as shown in Fig. 4. Shoulder 41 engages the verti cal shoulder 48' formed by recessing or stepping the top of reduced portion 33, as at 43. ' It will be noted that the two strap locks are 50 so positioned with relation to each other that the forwardly extending strap end Illa may be inserted between ?ange 38 and foot i3 so that a considerable extent thereof projects forwardly of head 11, and the rearwardly projecting end 55 llib of strap l0 may be located in superimposed substantially aligned relation to end Illa and ex tend over flange 38 beneath the lug 44 and thence between dog l4 and foot 15. vAn operative move ment of the handle 20 at this timewill tend to move the strap locks relatively away from each other and tension the strap ends about the article being banded. Due to the fact that dog I! end of which depends an arm 31 terminating at its lower end in a laterally projecting flange 38 ' angularly extends forwardly and dog l4 angularly 55 extendsrearwardly, the tensioning operation will .65 having a serrated bottom face providing a multi plicity of strap engaging teeth adjacent the upper tend to cause said dogs to more firmly clamp into strap gripping engagement and thereby pre face of foot l8. Head i1 is provided with a rela tively long, transverse bore 40 within which the shank 36 is journalled, and the right-hand end 70 of said bore (Figs. 1, 3, and 4) terminates in a recess 4| somewhat triangularly shaped in vertical section and having a bottom face merging with the top of foot l8 and an upper curved face 42 coextensive with bore 40. This recess receives 75 depending arm 31 and is of such size as to permit vent tendency of strap slippage. As shown in Fig. 1 which illustrates the application of our tool to tension a strap around an article. such 70 as a box having a ?at upper face, the forwardly projecting strap end Ilia normally passes beneath foot 22, but it will be appreciated that our device may be operated with said strap end passing over foot 22 if desired. 9,117,015 Our dc. vice is also constructed in such manner that it may also be easily applied to stretching the strap member In about articles of any shape and particularly about a bundle of merchandise having a curved outer surface, such as the bale A shown in Fig. 6. To accomplish this, the left hand side of head ll (Fig. 4) is provided with a laterally projecting cylindrical boss ill con centric with bore 40 and having a strap support~ ing member 5| journalled thereon for pivotal movement. The strap supporting member may comprise a longitudinally extending arm 52 jour nailed at one end on boss 50 and having a laterally projecting arm 53 at its outer end adapted to 15 underlie the overlapped strap ends when desired. Arm 53 is preferably provided with a rounded upper face soas to provide a line contact between the arm and lower strap end and thus facilitate stripping of the tool from the package after the 20 stretching and sealing operations have been com 3, foot and frame and adapted to pull the over lapped ends of a binding strap in opposite di rections to tension the strap about an article, and a member pivotally connected to the foot, said member having a laterally extending strap supporting portion located in spaced relation to the foot and cooperating therewith to support the overlapped strap ends in position for con venient application of a sealing tool. 3. In a strap stretching device for tensioning a strap about an article, a frame, a strap sup-v porting foot movably associated with ‘the frame, gripping means associated with the frame and the foot and arranged to respectively clamp the ‘opposite ends of a flat metal binding strap in superimposed relation, means causing .a relative movement of said foot and frame to tension the strap, and a forwardly projecting strap support -_ ing member pivotally secured to said foot and arranged to maintain a short‘ length of the over pleted. ‘The free end of the arm 53 is tapered, ‘ lapped strap portions in spaced relation to the as shown, to facilitate its positioning beneath a article during a binding operation. , 20 strap and the removalof the tool after sealing. 4.‘In a strap stretching tool for binding an Boss 50 laterally extends beyond arm 52, and varticle, a movable head having a foot adapted to shank 36 laterally extends beyond the end of boss support a pair of strap ends in overlapped rela 25 50. A coiled spring 55 is compressed between a tion, a gripping member on said head resiliently cap plate 56 (secured to the end of shank 36 as‘ urged towards said foot and into locking engage- ‘ by a screw) and arm 52 to frictionally maintain , merit with‘the underlying strap end, and a strap the strapsupporting member in any desired posi supporting member adjustably carried ‘by said tion. It will thus be appreciated that in the head and extending forwardly thereof, said mem 30 event that our invention is employed for applying , ber having a‘laterally projecting arm disposed a strap about a curved surface, the overlapping u ‘substantially parallel to and in spaced relation strap ends may be cooperatively supported be with the foot, said arm being adapted to engage tween arm 53 and foot l8 and in spaced relation to the article being handed so that an open seal may be properly positioned therebetween on said strap ends and a ’ sealing tool may be easily applied to firmly secure the seal in place. In the event that it is not desired to use the strap 40 supporting member 5|, it will be evident that it may be easily swung to an inoperative position as shown in Fig. 1, and spring 55 will tend to maintain it in said position. Furthermore, when tensioning a strap about a box or other article 46 having a ?at face, it will be appreciated that member 5! may or may not be employed, as de sired. , As many changes could be made in the above construction and many apparently widely differ ent embodiments of this invention-could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying draw ings shall be interpreted as illustrative and not 55 in a limiting sense. ' ' _ It is also to be understood that the language the article and cooperating with the foot to sup port the overlapped strap ends in spaced relation 35 to the article. ‘ 5. In a strap stretching device, a forward strap supporting foot, a rearward strap support ing foot, gripping means associated with ‘each foot and arranged to respectively clamp the op 40 posite ends of a flat metal binding strap in super imposed relation, means to cause a relative movement of said feet away from‘ each other to tension the strap about an article in binding re lation, and a strap supporting member pivotally 45 mounted on the forward foot and having a later ally projecting arirr located in spaced relation to the forward foot and adapted to cooperate there with in supporting a predetermined extent of the ‘ overlapped strap portions above the article being 60 banded irrespective of its shape. 6. In a strap stretching tool, a frame, a ‘fixed > strap supporting foot thereon, a movable mem ber within said frame having a forward strap supporting foot movable relative to said ?xed 65 foot, a gripping means associated with each foot used in the following claims is intended to cover and arranged to respectively clamp the opposite all of the generic and speci?c features of the invention herein described and all statements of ends of a ?at metal binding strap in overlying relation, manually actuated ratchet mechanism the scope of the invention which, as a matter arranged to move said feet away from each other of language, might be said to fall therebetween. and tension the strap in binding relation about an article, and a strap support pivotally secured to the movable foot and projecting forwardly We claim as our invention: 1. In a strap stretching tool, a strap support ing foot, a strap tensioning mechanism associated therewith and arranged to exert a pull in oppo site directions on the overlapped ends of a bind ing strap, and a strap supporting member ad justably connected to said foot, said member having a laterally projecting arm cooperating 70 with the foot in maintaining a short portion of the overlapped strap ends spaced from an article being handed. 2. In a strap stretching device, a frame, a strap supporting foot movably associated therewith, a 75 strap tensioning mechanism associated with said thereoffsaid support including a laterally pro- ' jecting arm~adapted to support the overlapped‘ _ strap ends in contacting relation with each other and to cooperate with the movable foot so that said contacting strap ends may be easily secured together with a sealing tool irrespective of the shape of the article being banded. 70 '7. In a strap stretching tool, a movable mem her having a laterally projecting foot adapted to support a pair of overlapped strap ends, a gripping dog supported by said member and pro; vided with a laterally projecting ?ange adapted 15 1 2,117,015 4 vided with a strap supporting face, a strap grip to clamp the lower strap end to the foot, a boss laterally projecting from said member, a strap ping dog having a shank journalled in the head ‘ support journalled on said boss, and resilient means frictionally restraining said movement, said support including a laterally projecting arm for pivotal movement and a strap gripping por tion in overlying relation to said foot, the shank having a transversely grooved portion terminat engageable with the article being bound and co operating with the foot to support a portion of the overlapped strap ends in contact with each portion of the rack, said shoulders eng'r ging each other and cooperating to prevent removal of the ing in a shoulder. and a shoulder on the reduced _ strap gripping dog from the head. other and in spaced relation from said article. The combination in a strap stretching tool 10 8. In a strap stretching tool, a strap gripping of 11. a frame, a rack member slidably movable mechanism comprising a member-having a lat and having a reduced portion on its end, erally projecting strap‘- supporting foot and a therein relatively long bore; a single piece strap gripping a head having a longitudinally extending bore a transverse bore, said bores intersecting be dog having a shank journalled in said bore, a and downwardly extending arm at one end of said tween their ends, the longitudinal bore accom the reduced portion of said rack mem shank, and a relatively broad and relatively thin modating means removably fastening the, head on said strap gripping ?ange projecting laterallyfrom ber, reduced portion, a strap gripping dog having a the lower vend of said arm and located above the shank portion iournalled- in said transverse bore. foot; a multiplicity of teeth on the bottom-of the the shank having a transverse groove. overlying 20 flange, and a spring located between the mem- ' her and movable arm tending to swing the arm said reduced portion and terminating at one side‘ a depending. shoulder parallel to said longi and urge the teeth towards said supporting face in tudinal bore, and an upwardly extending ‘shoul into strap gripping position. 9. In a strap stretching tool, a head having a der on said reduced portion, said shoulders coop relatively long transverse bore provided with a erating to prevent removal of the gripping dog 25 curved surface atone end concentric with and from the head without restraining pivotal move of the dog. forming a continuation of the surface of the bore, ment 12. > A strap stretching tool comprising a frame said head having a strap supporting foot posl- , having a rearwardly extending handle and a bore tloned below and extending beyond said surface, - extending axially through said handle, said body 30 a single piece strap gripping dog having a shank 30 portion journalled in said bore, 9. depending arm having a supporting surface on its under side, a at one end of the shank portion'and above said rack bar mounted‘for longitudinal movement in foot, a relatively broad and thin strap gripping said bore, a head on the forward end of said rack ?ange laterally extending from the lower end, bar and having a bottom supporting surface dis vof said depending arm and overlying said foot, posed ‘in the plane of said supporting surface on 35 the upper end of said arm. having a curvedface the frame, strap gripping members respectively slidably bearing on said surface, said depending carried by said‘ body and head and through which arm being angularly disposed to a plane per-_ pendicular to the foot and including the axis of the shank; resilient means tending to urge the . r , 40 ., H___>ij‘lange towards the foot and into strap gripping relatiOn, and means axially positioning the shank in said bore and vpermitting rotary shank move ment. 1 ,, _ r ‘ 10. The combination ina strap stretching tool 45 of a, frame, a 'rack member slidably movable therein and ‘having a reduced portion on its for . ward end, a head mounted on said reduced por tion and having a laterally projecting foot pro a strap is stretched when the head and frame are relatively moved apart, and an operating lever ratchet-connected to said bar and pivoted to said 40 body forwardly of said handle and adapted to swing above the handle, said bar and handle be ing inclined rearwardly and upwardly away from the plane including the bottom surfaces of said frame and head. 45 ' ‘ HARRISON C. BRISTOLL. ROBERT V. SANFORD. HOWARD C. DOOLI'I'I'LE.