US2102981A - Strap tensioning and sealing device - Google Patents

Strap tensioning and sealing device Download PDF

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US2102981A
US2102981A US23895A US2389535A US2102981A US 2102981 A US2102981 A US 2102981A US 23895 A US23895 A US 23895A US 2389535 A US2389535 A US 2389535A US 2102981 A US2102981 A US 2102981A
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strap
plunger
clip
jaws
lever
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US23895A
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Herman J Spencer
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LEECHGRIP Co
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LEECHGRIP Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00Bundling articles
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24Securing ends of binding material
    • B65B13/34Securing ends of binding material by applying separate securing members, e.g. deformable clips
    • B65B13/345Hand tools

Description

2i, i937. HIJ. SPENCER STRAP TENSIONING AND sEALING- DEVICE Filed May 28,- 1955.
4 Sheets-Sheet l INVENTOR www '21, 1937. l H. J. SPENCER v STRAP TENSIONING ANDv SEALING DEVICE Filed May 28, 1935 4 sheets-shew 2 STRAP TENSIONING AND SEALING DEVICE H. J. SPENCER Filed May 28, 1935 4 sheetssheet4 5 I Dec. 2, 19337;.4 H. J. SPENCER STRAP TENSIONING AND 2,102,981 SEALING DEVICE 4 Sheets-Sheet 4 Filed My 28, 1935 LN'vENToR l Patented Dee. 21, 1937 UNITED STATES 2,102,981 STRAP TENSIONING-AND SEALING DEVICE Herman J. Spencer, West by mesne assignments,
OHara Township, Pa., sylvania Application May y 19 Claims.
My invention relates to a'device for securing together the ends of a metallic reinforcing strip or belt passed around a container or bundle.
While severalv devices of this general character have been known heretofore, those with which Iv am familiar are all characterized by certain objectionable features. An object of my invention, therefore, is to produce a strap fastening device characterized by simplicity and relatively low rcost of construction, a high degree of effectiveness in operation, and requiring little or no maintenance. Other novel features of the invention and the advantages thereof will be pointed out in the course'of the following detailed description, an`d specifically enumerated.` in the appended claims.
In accordance with my invention', I provide a device having a base and a standard mounted thereon. A plunger, a presser head, and bending jaws are reciprocable in the standard for engagement with strands of strap or other similar metallic binder, extending below the latter. .A fastening-clip feeder including' a magazine adaptedto hold fiat blanks is disposed adjacent the standard and adapted to feed clips below the plunger. Means are also provided for drawing. the strands of strap tightly about .the box or other package before attaching the fasteningclip. The strands of strap are fastened in the following manner, viz, by disposing a fiat clip blank thereon, bending the `edges of the clip yaround the edges of the strap strands, and indenting or crimping the edges of the clip and the strands to effect a mechanical interlocking thereof which prevents relative movement of the strands of strap.
For a complete understanding of the invention, reference is made to the accompanying drawings illustrating a present preferred embodiment, although it will be understood that. numerous details shown and described may be otherwise embodied without, departing from the scope of my broader claims. Referring in detail to the drawings:
Figure 1 is a plan view of the clip showing the manner of its application to and the mechanical interlocking thereof with the meeting ends of a reinforcing strap or band; 1
Figure 2 is a side elevation thereof;
Figure 3 isa sectional'lview along the line III- III of Figure 1;
Figure 4 is a plan view of the device of my invention;
Figure 5 is a side elevation'thereof; l
Figure 6 is an endelevation as seen when. look'- i'ng from the left in Figure 5;
View, Pa., assignor, to Leechgrip Company, a corporation of Penn- 28, 1935, Serial No.'23,895
Figure 7 isa sectional view along the4 line VII-VII of Figure 6, partly `broken away, with parts shown in elevation;
Figure 8 is a sectional view similar to Figure 7 showing the parts atan intermediate operating stage;
Figure 9 is a sectional view similar to Figure '7 showing the parts at a more advanced stage of operation; Figure 10 is a view taken along the line X-X of Figure 6, showing parts in section with a bottom plan view of the remaining parts;
Figure 11 is a partial sectional view substantially along 'the line Xf-XI of Figure 7, parts being broken away for clearness in illustration, showing the positions of theparts corresponding generally to Figure 7, such that the presser head, jaws and plunger have been advanced into contact with the fastening clip;
Figure 12 is a view similar to Figure 11 showing positions of the parts corresponding to Figure 8; Figure 13 is a view similar to Figure llshowing positions of the parts corresponding generally to Figure 9;`
Figure 14 is a sectional view similar to Figure' 11 but is taken along the line XIV- XIV of Figure 5, and shows the parts in about the same positio'n `as Figure 11;
Figure 15 is a View similar to Figure 14 showing the parts in the same position as Figure 13; and
Figure 16 is a side elevation of a detail.
Referring now in detail to thedrawings, the device comprises a base I0 having a standard I I mounted thereon. The standard is split along a substantially central plane as indicated at I2, for convenience in assembling, into `two portions I3 and I4 secured together by screws I2a. The .portion I3 of the standard is secured to and supported on the base III. 'I'he portion I4 is carried onthe portion I3 in overhanging relation to one edge of the base Ill, which is taperedv or feathered off as at I5 to facilitate the entry of such edge under the meeting ends of a metallic strap or band I6 disposed around a box or other package indicated generally at I1. The tapered edge of the base I0 is slotted at I will presently appear.. u
In use, the strap I6 is drawn from a coil indicated generally at I9, wrapped. around the box I1, and the free end brought back under the portion of the strap extending to the coil, as shown in Figure 5. The device is then moved so that the tapered edge of the base Ill enters under the free end of the strap. 'Iips 20 on the edge of the base IIJ serve to hold the device in proper re- 8 for a purpose which lto sever the coil portion of the strap after it has I lation to the stra-p once it has been positioned. The coil portion of the strap is disposed between a shearing block 2| secured to the base and the lower edge of a normally upraised reciprocable shearing cutter 22. The inner faces of the portions I3 and I4 of the standard II are shaped to guide reciprocating movement of the cutter 22, which is actuable by means to be described later,
been tightened and before a fastening-clip has been appliedto the two overlying strands thereof. Keepers 23 vand 24 are pivoted on the standard I I to engage the strands of the strap and hold the device in proper relation thereto. The keeper 23 is operated manually. Automatic means for raising and lowering the keeper 24 will be described shortly.
Before shearing the strap from the coil, it is desirable that it be held tightly around the box or other container, or bundle. A lateral extension 25 of the standard II provides bearings for a shaft 26. A lever 21 is movable longitudinally in a hub socket 28 which is rotatable on the shaft 26. The lever 21 has a pin 29 adapted to enter a correspondingly shaped radial hole in the shaft 26, and a spring 3B wound around a pin 3| disposed in a slot 32 adjacent the end of the lever 21. 'Ihe spring 3U abuts against a screw 33 threaded into the hub socket 28.v The pin 29 is thus forced into its hole -by the spring 30 whenever it is disposed in alignment therewith, to provide a positive connection between the lever 21 and the shaft 26. The lever 21, however, may be freed from the shaft 26, if desired, by longitudinal movement against the l pressure of the spring 30, to withdraw the pin 29 from the hole in the shaft.
The shaft 26 is provided with an eccentric por- From the foregoing, it will be apparent that theband-tightening means, including the toothed discs 35 and the ratchet wheel 36, may be moved toward and away from the strap I 6 by rotating the shaft 26, because of the eccentricity of the portion 34 of the shaft. Wln the strap-tightening means has been moved into engagement with the strap, for example, by manual operation of the' lever 21, the lever 31 may be swung up and down by hand to drive the ratchet wheel 36 and the toothed discs 35. A pin or plug 40 extending upwardly through the base I0 is provided with a toothed upper surface adapted to engage the free end of the strap when the latter is positioned as shown in Figure 5. The plug is effective to hold the free end of the strap against movement while the coil portion of the strap is moved'thereover by rotation of the discs 35 to tighten the strap on the box I1. The disc teeth bite into the strap sufliciently .to pull it very tightly around the box as the lever 31 is pressed down to turn the discs.
When the strap-has been tightened around the box as described above, the free end is ready to be attached-permanently to the coil portion of the strap and the latter sheared from the body of the coil. I utilize a substantially at rectangular sheet metal clip 4I adapted to have its edges bent around the strap, as shown in vFigures 1 through 3, and crimped at 42 to permanently bind the two ends of the strap against relative movement. A supply of clip blanks is maintained in a magazine 43 mounted on the standard II. The magazine 43 comprises a sheet metal channel 44 having a sliding cover 45 thereon. The side walls of the channel are bent down adjacent the upper end thereof to form abutments 46 for the spring 41 effective to force the blanks downwardly toward a feeder. The stack of blanks in the magazine is indicated at 48.
A feeder slide 49 is reciprocable in a guide channel 58 mounted on the base I0 and has a' nger 5I projecting upwardly through a slot 50a in the guide channel 50 which is effective to advance the bottom `blank from the stack 48 along the top of the channel 50, into position to be pressed down onto the overlying strands of strap, bent therearound, and crimped thereto. The slide 49 is actuated by a nger 49a pivoted to the base I 0 and working through a slot in one side of the guide channel 50. The nger 49a has a slot 49h through which a pin 26a extending radially from the shaft 26, projects. The shape of the slot 49h is such that on rotation of the shaft 26, the pin 26a causes the finger 49aA to oscillate. The finger 49a is provided with a pin 49c projecting through a slot in the keeper 24 whereby the latter is raised when the finger 49a retracts the slide 49.
The means for vpressing the clip blank down on the strap, bending and crimping it, includes a presser head 52 which is reciprocable in suitable guides formed in the standard II. As shown in Figure 5, the guide channel 50 extends through a suitably shaped opening in the portion I3 of the standard. Adjacent said opening, a holder 53 is pivoted, as shown in Figure 7. The holder 53 is normally urged by a suitable spring 53a into engagement with the lower end of the presser head 52. The edge of the holder nearest the opening through which the guide channel50 extends, is slightly beveled to permit a clip blank to advance easily between the holder and the presser head. When advanced into a position under the presser head by a finger 5I, the clip blank is held there by the holder 53 until the latter is depressed, by means to be described later, whereupon the holder 53 swings aside, as shown in Figures 8 and 9. It returns to theposition of Figure '7, however, when the presser head is retracted.
The guides for the presser head 52 are shown at 54 and the h'ead is provided with lugs 55 (Figure A14) cooperating with these guides. The head is of generally U-shape having a bottom v56 and sides 51. A pair of bending jaws 58 are carried between the sides 51. A plunger 59 is reciprocable between the jaws 58 and between the sides 51. A pin 60 extends through a slot 6I in the plunger 59, through holes in the upper portionsl .the plunger 59 upwardly relative to the head 52,
. 2,162,981 to'the extent'permitted by the length of the slots' v 8I and 62, and the jaws open.
A hand lever 68 is pivoted to the plunger59 adjacent its upper end. Links 89 are pivotally connected to the lever 68 and to the portions ,I3 and I4 of the standard II, The links89 have cam surfaces 10 thereon adapted to cooperate with cam rollers 1I on the plunger, as shown in Figures 8 and 9 after the plunger has been started downward by the initial movement of the lever 68. l l
The operation of the device will now be described. The strap I6 having been disposed about the box I1 and held therearound by the operation of the levers 21 and 31 in the manner already described, the coilv end of the strap is then sheared off. This is effected by pulling the lever 21 longitudinally to free it from the shaft 26 by removal of the pin 29 from its hole. The strands of the strap I6 remain gripped between the discs 35 andthe plug 40. On counterclockwise rotation i* of the lever 21, it engages the outturned end of a lever 19 pivoted at 80 onthe portion I4 of the' standard II. The lever 19 has an inturned end 8I projecting between the portions I3 and I 4 of the standard II. The inner end 8| of the lever 19 has anger 82 thereon which works in a suitably shaped hole in the upper end of the shearing cutter 22, as best shown in Figures 5 and '7. Continued rotation of the lever 21 causes clockwise rotation of the lever 19, exert-ing a downwardthrust on the shearing cutter, with the result that the coil portion of the strap is severed from the portion lwrapped around the box.
'The lever 21 is held stationary at its extreme counterclockwise position and the next step is ythe operation of lever 68.
The lever21, of course, when operated to force the toothed disc's 35 into engagement 4with the upper strand of the strap, rotates the shaft 26 counter-clockwise and thereby feeds a clip blank from the magazine 43 between the bottom 56 of the presserhead' 52v and the spring-pressed pivoted holder 53.
As the lever 68is rotated, the plunger 59 descends. A spring 12 bearing on one end' of thc pin 80 causes the plunger 59 to descend to the extent permitted by the other parts, without engagement of the rollers 1I by the links 69. This is deferred until the latter part'cf the operation when it is desired to exert greater pressure on the plunger. During the initial portion of this operation, a -detent 15 loosely mounted in a slot 1G in' one side of 'the plunger 59 is adapted to engage the pin 60 at its lower fmd an d, at its upper, to cooperate with a xed stop 11 carried between the portions I3 and I4'of the standard II, and projecting into the slot 16. When the plunger is retracted, the detent 15 and the stop 11- are disposed side by side in the slot1i, as shown in Figure 14. This causes the jaws 58 to descend with the plunger in their opened position, since the pin pas'ses through theholes adjacent the upper ends of the jaws. The springs 61, of course, cause the head 52 to move downwardly with the plunger pressing the clip downl wardly ontothe strap I6 in somewhat the manner shown in'Figure 8, and simultaneusly displacing the holder 53. When the bottom 56 of the presser head 52 has forced the clip to lie flatl on the upper strand ofufthe strap I8, it is arrested in its downward movement. Further movement of the plunger 59, however, compresses the spring 61 and forces the clip tightly down on the strands Aand pressesthe strands tosurfaces 10 to engage the rollers 1I tom 56 of thepresser head 52 This position of the parts is shown in Figure 9. 45
of the jaws 58 continues until the ends of the 5 pin 60 strike the bottom of the recesses 83 throughv which they project. Further movement of the plunger is possible, however, since the pin 60 passes through a slot therein. The jawsv 58 can-` not descend further, however, because they pivot l0' on the pin 60.
The detent 15, however, has a shoulder 18, and the slot l18 has a corresponding shoulder adjacent its lower end. As the plunger 59 descends,
the detent 15 moves withv it initially but ,is stopped l5 l when the pin 69 engages the bottoms of the recesses 63. On further downward movement of the plunger, the shoulder 18 on the detent and the corresponding shoulder on the side ofthe slot 16 forces the detent 15 into a tilted position 20 shown ,in Figure 15, in Awhich itv engages under the stop 15. In that position, the detent holds the pin 60 in its extreme downward position while `further bending and the crimping of the clip is completed. The pin 68 which traverses the 25 overlapping slots (i5-in the jaws, however, is carried downward by further movement of the plunger and as it enters the lower portions of the p slots 65, it draws the jaws together. As shown in Figure 8, when the pin 6l) reaches the limit of 30 its downward movement, the jaws 5.8 have been forced below the level of the strap strands and.V have bent the edges of the 'clip at substantially right angles to the body thereof. Further downward movement of the plunger '66 therewith, causes the jaws to be contractedy as shown in Figures l2 and 13, to b end the clip edges around and under the strap strands.
Further rotation of the lever 68 causes the cam plunger down with great pressure. The lower end of the plunger is provided with crimping teeth 13 adapted to project through slots 14 in the bo`tand the jaws 58.
The engagement of the clip by the teeth 13 under great pressure causes the crimping eiect shown at 42 in Figure 1.
When the plunger 59 has been retracted, permitting the shoulder 'i8 to move under the cor- 50 responding shoulder on the wall of the slot 16, the jaws have been completely opened and the `detent 15 `is then restored to the position of Figure 14 due to the upward pressure exerted on the .pin 69 by the lower end of the slot 6I in the 55 plunger.
The lever 21 is then position and the shaft vlease the grip of thediscs restored to its previous 26 turned thereby to re# 35 on the strap. The
whole device may then be slipped out from under 60 the strap, which has been tightened around the container or bundle and permanently fastened.
It will be apparent from the foregoing description that the invention provides a device for expeditiously and effectively securing together the/65 ends of a binding or reinforcing strap passing around a container or bundle. It -will also be apparent that the device is relatively simple in construction so that it^can be manufactured comparatively cheaply and operated by unskilled 70 labor. The device is compact and complete and, at the same time, is of such size that it can easily be handled. The one unitary 4device incorporates means for tightening, binding and severing the strap, lautomatic mechanism to feed an un- 76 carrying the pin 35 and force the 40 formed clip, said clip.
The use of a flat, rectangular clip blank instead of a partially formed clip as heretofore employed represents a material advantage in the low cost of making the clip blanks and the great facility with which the blanks may' be stacked compactly.
Although I have illustrated and described herein but one preferred embodiment of the invention, it will be recognized that changes in the construction disclosed may be made without departing from the spirit of the invention `or the scope of the appended claims.
I claim:
l. A strap fastening device comprising a standard, a plunger reciprocable therein, means for feeding a fastening-clip below the plunger, a strap tightening disc, and means for actuating the disc mto engagement with a strap disposed beneath the plunger, said feeding means being operated by said actuating means.
2. A strap fastening device comprising a standard, a plunger reciprocable therein for binding together strands of strap disposed therebelow, meansfor tightening the strap before binding, a hand'lever for moving said means into engagement with strap passing beneath the plunger, a shear for cutting the strap, a lever for actuating the shear, said hand lever being disengageable from said tightening means and effective on rotation to operate the shear actuating lever.
3. A strap fastening device comprising a standard, a, plunger reciprocable therein,`and means for operating the plunger oted to the plunger, and a link pivoted to the lever and the standard, and a cooperating cam and follower on said link and plunger, effective to inand means to completely deform lcrease the mechanical advantage of the lever in operating the plunger, at a predetermined time.
4. A strap fastening device comprising a standard, a presser head reciprocable therein, a magazine for fastening-clips adjacent the standard, means for feeding clips beneath the head including a guide terminating adjacent the head, and a clip holder pivoted adjacent the guide, eective to hold a clip advanced along said guide against said head, and displaceable by said head on movement thereof.
5. A strap fastening device comprising a base having a standard thereon, and means for binding together strands of strap extending below the standard including a presser head reciprocable in the standard, a plunger movable through the head, bending jaws pivotally and slidably connected to the head and plunger, means for limiting movement of the head, and means for yieldingly holding the plunger upraised relative to the head, and the jaws open.
6. .The apparatus deflned by claim 5 characterized by means effective to close the jaws on continued movement of the plunger after the head reaches the limit of its movement. 7. The apparatus dened by claim 5 characterized by means eective after the plunger has moved sufliciently to close the jaws to prevent opening thereof until the plunger is retracted.
8. Strap fastening mechanism comprising a standard, a presser head movable therein, a plunger having crimping teeth movable through the head, bending jaws pivoted on a pin traversing slots in said head and plunger, and means for operating the presser head, the plunger and the bending jaws.
including a lever piv- 9. Strap fastening mechanism comprisinga:
the head, said head having a portion with slots toy admit said teeth.
11. Strap fastening mechanism comprising a standard, a plunger reciprocable therein, bending jaws pivoted on said plungerand movable therewith, means for limiting movement of the jaws with the plunger, overlapping cam slots in said jaws and a. pin on the plunger entering said slots to close the jaws on movement of the plunger after the jaws have reached the limit of their movement with the plunger.
12. In a strap fastening device, a shearing cutter, a lever for actuating the cutter, strap-gripping means and a lever for actuating said means, said last-mentioned lever being disengageable from said means and eifective on movement thereof to actuate the first-mentioned lever.
l 13. 'I'he apparatus defined by claim 1 characterized by a keeper for holding strap below the standard, and means operated by said actuating means for raising and lowering said keeper.
14. A strap fastening device comprising a standard, a plunger reciprocable therein for binding together strands of strap disposed therebelow. apparatus for .feeding a fastening clip below the plunger, a pair of keepers for maintaining the strands of the strap' in alinement, one of the keepers being movable, and means actuated by the clip feeding means for moving the said movable keeper into strap alining position.
15. Apparatus for fastening together the ends of a binding strap comprising a standard, a reciprocating presser head mounted therein, a plunger reciprocable in said presser head, a plurality of pivotally mounted bending and crimping jaws arranged to be actuated by said plunger, said jaws being normally disposed above the level of the strap, a magazine for fastening clips adjacent the standard, means for feeding a fastening clip from the magazine to below the said presser head, means for holding a clip below said presser head, and actuating devices for moving theV plunger, the presser head and said jaws substantially simultaneously, initial movement of the plunger operating to lower the presser head and the fastening clip onto the strap positioned therebelow, and further movement of the plunger in the same direction operating to move the jaws downwardly past the plane of the fastening clip and the strap and to bend the fastening' clip around the strap and to crimp the same.
16. Apparatus for fastening together the ends of a binding strap comprising a standard, a reciprocating presser head mounted therein, a
1 plunger reciprocable in said presser head, a pluing clip from the magazine to below the said presser head, means for holding a clip below said presser head, actuating devices for actuating the plunger, the presser head and the said jaws, said actuating devices being so arranged that initial movement of the plunger will operate to lower the presser head and the fastening clip onto the strap positioned therebelowl and further lmovement of .the plunger in the same direction' will operate to move the jaws downwardly past the plane of the fastening clip and the strap and to bend the fastening Aclip around the strap, and crimping means carried by the plunger, the crimping means being brought into operative engagement with the clip andl strap by further movement of the plunger in the same direction as aforesaid.
17. 'I'he apparatus defined in claim 15, characterized by means for gripping the strap for tightening it, and connections between said means and said clip feeding means to operate the latter simultaneously with the former.
18. Apparatus for fastening together the ends of a binding strap and a clip-seal comprising means for holding the strap ends in superposed relationship, feeding and guiding apparatus for positioning a substantially at clip blank transversely of the ends of the strap with the ends of the clip projecting laterally therefrom, holddown means for holding the strap and clip in superposed relationship. a pair of movable jaws,
and'means including a reciprocableplunger for successively moving the hold-down means into operative position and the jaws into engagement with the free ends of the'clip and'for bending v the free ends of the clip through an angle substantially greater than 90 around the strap ends.
19. Apparatus for fastening together the ends of a binding strap and a clip-seal comprising means for tensioning and holding -the strap ends in superposed relationship, clip feeding and guiding apparatus for positioning a substantially at clip vblank transversely of the ends of the strap with the ends of the clip projecting laterally ,therefrom hold-down means for holding the strap and clip in super-'posed relationship, a pair of movable jaws, means -including a reciprocable plunger for successively moving the hold-down means into operativeposition and the jaws into engagement with the free ends of the clip and. for
.bending the free ends of the clip through an angie substantially greater than 90 yaround the strap ends, an'dmeans actuated by theplunger for crimping the strap and clip.
i HERMAN J. sPENoER.
US23895A 1935-05-28 1935-05-28 Strap tensioning and sealing device Expired - Lifetime US2102981A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595886A (en) * 1947-04-23 1952-05-06 Stanley Works Box strapping tool
US3411551A (en) * 1965-03-17 1968-11-19 Interlake Steel Corp Manual strapping tool
US3811482A (en) * 1972-10-11 1974-05-21 Cyklop Ab Sealing tongs
US9221567B2 (en) 2012-01-25 2015-12-29 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595886A (en) * 1947-04-23 1952-05-06 Stanley Works Box strapping tool
US3411551A (en) * 1965-03-17 1968-11-19 Interlake Steel Corp Manual strapping tool
US3811482A (en) * 1972-10-11 1974-05-21 Cyklop Ab Sealing tongs
US9221567B2 (en) 2012-01-25 2015-12-29 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps
US9428290B2 (en) 2012-01-25 2016-08-30 Southern Bracing Systems Enterprises, Llc Systems, methods, and devices for tensioning straps

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