US1730669A - A cobpobation oi - Google Patents

Description

c. M. MaocHEsNEY ET AL. 1,730,669

SEALING DEVICE 4 Sheets-Sheet l Filed NOV. 19. 1926 Oct. 8, 1929. c..M. MaccHl-:SNEY ET AL 1,73039 SEALING DEVICE Filed Nov. 19, 1926 4 Sheets-Sheet 2 Y ffys Uct. 8, 1929. c. M. Mac'cHEsNEY ETAL I V 1,730,569

SEALING DEVICE Filed Nov. '19, 1926 4 Sheets-Sheet 4 in I Patented @et 8, i929 paires lditiiil CHESTER M. MACCHESNEY AND JOHN EKEBN OTT, F CHCAGO, LLINGS, ASSGNGBS T0 ACME STEEL COMPANY, OF GHCAGO, ILLINOS, A CGREORATN OF LLNOIS SEALING DEVICE Application led November 19, 1926.

This :invention relates to improvements in sealing divices and its purpose is to provide improved means ttor applying and manipulating' a seal on the overlapping ends ot' a strap or the like tor the purpose ot securing said ends together. 'lhe principal object ot the invention is to jnovide a sealing device adapted to hold a seal during the operation ot applying the device to a strap and having` means tor bending' the seal around the strap and slmaring.;i both the strap and the seal to eiiect a tigh anion ot theoverlapping ends oit the strap. Another object of the invention is to provide :improved means tor automatically holding the sealing blank in preliminary position in the sealing device before the sealing operation jlieriforined. Still anotherobject of the invention is to provide a sealing device having iinprovedsdie members tor bending the sealing member' into tight 'lirictional engagement with the strapl and for effecting a shearingl action on the seal and the strap transversely to the direction in which tension is applied in the strap. A further object of the invention is to provide improved means for guiding the bending.,y and cutting dies ofA the sealing device so that a symmetrical seal is formed. Another .teatnre is the provision of a sealing device having cooperating cutting edges which are relatively lined when the shearing torce is applied to the seal. A inrther feat-nre the provision ot a device capable oi use in applying various itorms o'l seals such as tubular seals or channel shaped seals having straight ortapered sides. Other objects relate to various features ot construction and arrangement which will appear more tally hereinafter.

'lhc nature ot the invention will be understood -l`ron'1 the 'following specilication taken with the accompanying drawings in which two embodiments are illustrated. ln the drawings, Figure 1 is a pers pcctive view showin a bei: and the improved sealing device ot nt invention applied to a reinforced strap extending around the boi: for the purpose et' sealing the overlapping ends of the strap; F ig. 9. shouf's a plan view of the relatively mova ble heads which carry the bending and cutting dies of the device; Fig. 3 shows Serial No. 149,307.

termediate position ot the arms and the jaws or heads, `the walls or legs ot' the seal being partially bent over the overlapping ends ot the strap; Fig. 6 is a sectional view similar to that et Fig. s* illustrating the tinal position of' the jaws or heads ot' the device after the dies have operated to bend the sides or legs ot the seal and shear the seal as well as the strap; Fig. 7 is a sectional view taken on the line 7 7 o't Fig'. 3; F ig. 8 is a sectional view taken on the line 8 8 ot F ig. 3; F 9 is a detail sectional view taken on the line 9-9 of Fig. 3 illustrating one means ot' holding the heads and aws in predetermined relative positions; Fig. 10 is a perspective view of one of the heads and its aws with the cutting die mounted in position therein; Fig. 11 is a sectional view taken on the line 11-11 ot 10; Fig. 12 is a perspective view or" the saddle on which the seal is seated during its application to the strap; Fig. 13 is a perspective view or" the overlapping ends of the strap showing the sealing .blank oi" Ll-shape cross-section applied thereto, illustrating the relative positions ot the parts beiore the sealing blank is `operated on by the die members; Fig. ll is a perspective view similar to that ol F ig. 13 illustrating the resulting seal after the sealing device has operated on the blank and the strap; Fig. 15 is a perspective view or' another form ot channel seal having tapered sides which may be used with the improved sealing s device; Fig. 16 is a perspective view ot' a closed or tubular seal with which 'the sealing device may also be employed; Fig'. 17 shows an elevation ot the die carrying heads of ainodilied torni ot' the invention; Fig. 18 is a sectional view talen on the line 18-18 of Fig. 17 showing the interior construction the device; Fig. 19 is a sectional view taken on the line 19-19 et Fig. 18; Fig. 2O is a sectional view taken on the line 20-20 of F ig. 19; Fig.

21 is a sectional View similar to that of Fig. 18, illustrating an intermediate position of the parts with the arms of the sealing blank partially bent toward their final positions; Fig. 22 is a sectional view similar to those of Figs. 18 and 21, illustrating the positions of the parts after the dies have moved the parts of the seal to their linal positions. Fig. 23 is a sectional view taken on the line 23-23 of Fig. 21; Fig'. 24 is a perspective view of the holding slide of which the sealing blank is held in position preliminary to applying it to the strap; and Fig. 25 is a perspective view of the anvil embodied in the device of 17 to 2st, inclusive.

Referring to Figs. 1 to 12, inclusive, the first form of the invention, designated generally by the numeral 25, comprises two similar operating levers 26 which are provided with handles 27 and which are bent transversely at their other ends, as shown at 2G, so that the two levers cross each other as illustrated in Fig. 1, terminating beyond the point of intersection in enlarged heads 28 adapted to carry the bending and cutting jaws which engage the sealing` blank to be operated on by the device. The levers 2G are not connected at the point of intersection but have a pivotal connection to each other through two cheek plates 29 which are located on opposite sides of the heads 28 and which areY pivoted to each of said heads by pins 30. The pins 30 are provided at their opposite ends with grooves 30 adapted to receive spring clips 3l located in contact with the surfaces of the cheek plates, as shown in Figs. 2 and 3, and having U-shaped parts 31 adapted to enter the annular grooves 30a in the pins to retain the pins in assembled relation with respect to the other parts of the device. Each of the spring clips Bl is provided with an angularly disposed resilient extension 31b adapted to contact with the adjacent cheek plate with sufficient pressure to prevent accidental removal of the spring clips from the ends of the pins. The spring clips preferably have trie extensions 31J extending slightly over the edges of the cheek plates, as illustrated in Fig. 8. The outermost edges of the cheek plates 29 are provided with oppositely disposed rectangular notches 32 adapted to receive the strap or other member to which the seal is to be attached by the operation of the device. The sealing blank, formed separately of sheet metal, may be in the form of a channel-shaped member 33, as shown particularly in Figs. 3 and 123, having a base and two transversely extending legs or walls 33h. rFhe sealing blank may also be in the forni shown in Fig. 15 where the side walls or legs 34@ of the blank are shown converging slightly toward their outer ends, or the blank may be of the closed or llat tubular form Bab shown in Fig. 16, in which case the blank must be threaded on the ends of the strap before applying the sealing device. The blank or other sealing blank is adapted to be received in the space between the rectangular notches 32 and is adapted to seat upon a saddle having the form shown particularly in Fig, 12, being provided with an outer flat surface 35 which contacts with the sealing blank and with oppositely disposed downwardly converging concaved surfaces 35" which extend partially between the heads 2S of the lever arms 2li. The saddle 35 is provided at opposite ends with trunnions 16 which engage suitable bearing apertures or recesses formed on the inner sides of the cheek plates 29, as illustrated in F 8.

In using the device to apply a seal to a strap or the like, the seal 33 is first placed in the device 25 in the position illustrated in Figs. 3 and 4i and, with the sealing blank held in the device in the manner hereinafter described,the operator brings the device into proximity to the overlapping portions of the strap to he sealed, as illustrated in Fig. lv1 where a bei: 3T is shown as having two sheet metal straps 3T extending around it. The sealing device 25 has been operated to forni a seal Si on one of the straps and is in position to ferm the seal on the other strap.

The heads 28 of the scaling device are otl'set laterally as shown in Fig. 2 wi th respect to the body portions of the levers 2G, to permit the inclined portions 2liL of the leversto cross each other as shown in Fig. 1, and upon relative movement of the heads 28 about the pivot pins 30, the walls or legs 33h of the seal ing blank 33 are bent inwardly over the overlapping portions of the strap. This inward bending is effected by means of jaws or bending dies 38 which are formed on the upper and inner sides of the heads 28, leaving undercut recesses i9 beneath the jaws, as shown, for example, in F 4. Extending downwardly and outwardly from the lower walls 39 oi each recess 39 is a channel 40 of circular crosssection adapted to receive the cylindrical portion 41a of a cutting die 41. rI'he channeh ti) are circular in cross-secton to receive lne cylindrical body portions 4l of the dies which terminate in cutting portions l1" of rectangular cross-section arranged to project inte the notches 42 by which the jaw $58 on each head is divided into two parts. Each notch Ll2 extends inwardly beyond the lower surface 39 of the adjacent recess and .has a flat bottom wall extending radially outward from the traveling pin hereinafter described. The parallel side walls of the notches l12 Aengage the side walls of the portions 41") of the dies and the shoulders at 'the inner ends of the portion l1d of the dies engage the shoulders a at the inner ends of the channels 40, these shoulders being in line with the bottom walls of the respective notches 42. The part 411 of each die is provided With a. transversely extending notch lll) 43 of substantially semi-circular form which is adapted to receive and be closely fitted by one of the pivot pins 30. The pins thus serve to retain the dies 41 in position within the channels and permit the dies to be readily replaced when desired. rl`he cutting portions 41" of the dies project inwardly beyond the surfaces 39a of the recesses beneath the jaws and the notches are of the same width as the projecting portions of the dies 4l, so that when a cutting die 41 `is brought into contact with the seal, the metal on the opposite side of the seal can be forced upwardly into the opposite notch 42, the edges of which form complementary cutting dies. The sides of the saddle 35 are similarly provided with notches 35G adapted to receive the dies 4l when they are moved upwardly.

When the sealing blank 33 or other sealing blank placed in the sealing device 25, the jaws are widely separated as shown in Fig. 3, the extent of this separation being limited by a projecting lug 45 on one of the levers engaging the laterally projecting` .head 28 on the other lever. After the seal has been inserted, the levers 26 are adapted to be returned automatically to a position wherein the sides of the seal will be gripped by the opposed jaws with sufficient pressure to retain the seal in place during the application of the seal and sealing device to the overlapping ends of a strap in the manner illustrated, for example, in Fig. 1. This operation of the lever arms 26 is ell'ected by the operation of a ball 46 mounted in a bore 47 which extends through one of the levers 26 and partially into the lug 45, as shown in Fig. 9, the ball 4G being pressed by a coil spring 48 so that it engages a recess 49 formed in the face of the opposite lever 26 when that recess is brought into alignment with the ball by the location of the levers in that relative angular position which will cause the sides of the seal to be gripped by the jaws as explained above. One side of the recess 49 is tapered as shown at 49a to permit the ball 46 to ride partially out of the recess during the operation of separating the levers 26 to the extreme position wherein the lug 45 engages the head 23 of the opposite lever. "When the levers and jaws have thus been separated to the extreme position and the seal has been inserted, the pressure of the ball 46 on the inclined surface 49"* will automatically return the ball to engagement with the bottom of the recess 49 and thus move the jaws inwardly to the position wherein they engage the sides of the seal, such as the walls or legs 33b of the sealing blank 33. The sealing device may then be conveniently moved by the operator to cause the overlapping ends of the strap to be received by the seal in the recess between the jaws 38. ln case the tubular type of seal shown in Fig. 16 is employed, the ends of the strap are threaded through the seal before the sealing device is applied but the seal 34 shown in Fig. l5 may be applied to the sealing device before engagement with the strap as in the operation of the sealing device with the form of seal shown in Fig. 13.

The relative arrangement of the jaws 38 wherein the legs of the sealing blank 33 are gripped by the jaws and are in engagement with the overlapping ends of the strap 37, is illustrated in the sectional View of Fig. 4. After the parts have been placed in this position, a pressure upon the lever arms 26, imparted through the handles 27, will overcome the resistance afforded by the engagement of the ball 46 with the recess 49, and upon further movement of the lever arms 26 inwardly toward each other, the jaws 33 will bend the legs 33b of the sealing blank inwardly over the edges of the strap 37a, as illustrated in Fig. 5. During this operation, the two heads 28 and the two jaws 33 are retained in symmetrical arrangement with respect to the cheek plates 29, an d the parts ca rried thereby, by means of a traveling pin 51 which is located betwoen the heads Q8 and between the cheek plates 29. rllhis pin is of symmetrical form and the curved surfaces thereof are engaged on opposite sides by recesses 52 which are .formed in the oppositely disposed curved faces 53 of the heads 28. These curved surfaces 53 are adapted to coact with the similarly curved surfaces 35b of the saddle 35A and these surfaces are concentric with the of the pins 3() so that .in all positions of the jaws, any pressure received on the saddle 35 is transmitted to theheads 23, thereby preventing any undue strain on the trunnions 36 which retain the saddle in position. As the heads 28 are rocked about the pivot pins 30, the traveling pin 51 moves downwardly as viewed in Fig. 5, so that the jaws 38 are retained in. symmetrical position with respect to the blank 33, and the legs 33b of the blaulr are bent inwardly in unison and to the same extent over the top surfaces` of the strap. During this bending operation, the legs 331 are brought into tight frictional engagement with the lateral edges of the strap and the bottom wall of the seal is retained in close engagement with the strap 'by the underlying saddle 35 so that as the bending operation continues the legs 33b are forced downwardly into contact with the top surfaces of the strap and at the -same time the cutting dies 41 are brought into action so that the inclined cutting edges 41C of these dies engage the lower outer corners of the seal 33. as shown in Fig. 5, and then force the seal and oppositely disposed portions of the strap upward- .ly with the result that the seal and the strap are sheared by the dies against the cutting edges formed by the walls of the notches 42, as shown in Fig. 6, thereby forming a sealing joint having the form illustrated in Fig. 14 where it will be seen'that the opposite sides strap 37a. This shearing action thus produecs abutting edges on the seal and ,st-rar which eiiiectnally prevent relative separat-ion or' the overlapping ends ot the strap in the manner indicated more telly in United States Patent No. 1266616, granted March 19,19181 on the applicati n otllalphl-l. llorton. rl`he inward movement of the heads 26 and the extent o'l` the shearing action is limited by a lug on one of the levers engaging the edireo'lf the other lever.

lilhen the scalzi i' device is employed with the sealing blankA yi shown in AFig. l5. the i, fetai Ml .i in i gementwith the strap b v the inclinar he legs ot he seal and in the subs, ident operation ot' the device the legs olE the seal are bent sea.

inwardl i as in the operation ot the device npon the seal 33. l' 'Then t ie sealing device is used with the seal o@ shown in Fig, 16` it is unnecessary for the et the scaling device to peA iorm the preliminary bend eration bnt after the jaws l inwardly te the necessaryv et the seal and strap are shea eraaion explained above, to toi-1n a tight joint ing the overlapping enea oi the strap.

A Y, apparent that by the operation et this invention, the ovmlapping ends of a strap or the like may l, rigidly and permanently secured to each other in a convenient manner and that the overlapping ends ot the strap are held tog iher not only by trictional tact with the seal.. but also by the abutting es of portions of the seal and which ha been sheared by the operation ot' the cutting dies, 'lfhe ina nlation ot the parts which permits the se Y retained in position wigain the sealing device during the process of applying the sealing device to the strap.. makes it possible to operate the device 'with great convenience and with great speed in applying to straps which have been pas i r stretched around boxes or other packagfs by means of other tools which may be employed Yfor that puriosa.

The modified form ot the invention illustrated in l to 22h inclusive, differs from the torni first described chierly in the different character of the means for holding the sealing blank in position within the sealing device preliminarily to applying the blank to the strap and in the means for holding the cutting dies in place. ln this form of the invention, there are two levers 66 which cross each other at 66, being provided at their operating ends with enlarged heads 6l. These heads are ollset laterally as in the first form of the invention so that they permit the operating levers to cross eac-h other in the manner illustrated, The heads 6l of the levers are connected by pivot pins 62 with cheek plates 63 having a form similar to the pre viously mentioned cheek plates, the pivots 62 in this case being in the form of bolts which are secured by nuts 64 to hold the cheek plates in assembled relation on opposite sides ol the heads 6l. The cheek plates 63 are pro vided with notches 65 of rectangular crosssection adapted to receive the overlapping portions ot the strap 66 to be connected by the seal ing blank 67 which may preferably be ot' channel form, having a base 67L and parallel side walls 67h, as shown in Fig. 16, although other forms ot blanks may be enlployed. then the sealing blank 67 is in position, between the outer portions of the head 6l, it is seated on a saddle 68 having the form illustrated particularly in Fig. Q3, the saddle being` provided at its ends with trunnions 69 which pivotally engage suitable recesses formed on the inner sides ot the cheek plates 6?).

In this Yform of the invention, the sealing blank 67, when placed on the saddle 68, is held in position during the opera-tion ot' applying the sealing device to the strap by means ola retaining device 70 comprising two plates 7l connected by a cross-pin 72, as shown particularly in Fig. 22. The crosspin 7 2 Jforms a traveling member which engages semi-circular notches 7 3 formed in the adjacent curved faces 6ln of the heads 6l, thereby7 maintaining a symmetrical arrangement of the heads 6l with respect to the cheek plates 63 when the levers 60 are manipulated. The plates 7l of the retaining device are provided with notches 74 which are adapted to receive the trunnions 69 of the saddle and the tongues 7la which are thus formed on op posite sides of the notches 74 have their ends 7lb bent inwardly to engage 'frictionally the ends ot' the channel-shaped sealing blank 67. The plates 71 of the retaining device are mounted to slide in grooves 75 which are 'formed on the inner sides of the cheek plates 63 so that when the levers 60 are operated to move the heads 6l in the bending and shearing operations, the retaining device 70 is drawn inwardly by the movement of the traveling pins 72, thus withdrawing the ends of the lingers 7ln and permittingr the strap 66 to pass into engagement with the base 67 of the sealing member seated on the saddle. The lateral concaved taces 66n ot' the saddle coact with the curved faces 61l of the heads so that the saddle is supported independently of the trunnions.

The heads 6l ot the levers are provided at their outer ends with inwardly directed inclined jaws 77 having spaces 78 located beneath them and these jaws serve as the bending dies for turning the legs 67b of the sealing blank inwardly over the sides of the strap Cil opposite the base 67 a of the sealing member. The jaw 77 on each head is divided into two parts by a notch 78 having a lower wall 78a located well below the curved faces 61 of the heads. The shearing of the sealing member and the strap is effected by means of cutting dies 79 having inclined cutting faces 7 9n adapted to engage the edges of the seal and strap when the jaws 77 are closed toward each other. rlhe notches 7 8 are of substantially the same width as the cutting portions 7 9? of the dies 79 and the e'dges of the notches 7 8 serve as complementary cutting dies for partially shearing the seal and the strap. The cutting dies 79 are provided with cylindrical stems 7 9 which fit into channels 81 formed in the heads 61 and these stems are normally retained in place by plugs 82 which threadedly engage the outer ends of the channels 81 and which have grooves 82n for engagement by a screw driver. The cylindrical por! tions 79c of the dies engage shoulders 83 whichare in the planes of the bottom walls 78a ot the notches 7 8 which are engaged by the narrower cutting portions 7 9b, as shown .in Fig. 24. The movements of the heads 61 by the operation of the levers 60 are limited, as in the irst form of the invention, by

means of lugs attached to the handles and engaging the heads. j

ln` the operation of the second form of the invention, the sealing blank is first placed in position within the retaining member and in contact with the saddle 68, whereupon the operator moves the sealing device bodily until the arms `67 1 of the seal are projected on opposite sides of the strap 6G, the strap being engaged on one side by the projecting ends ot the fingers 71a of the retaining members, as shown in Fig. 18. Upon relative movement of the handles 60 to effect a movement oit the heads 61 toward each other, the jaws 77 move inwardly and, at the same time, the cross-pin 72 moves toward the handles of the levers with the result that the plates 71 are withdrawn and the overlapping ends of the strap 66 are permitted to pass into engagement with the base 67a oi the sealing blank. At the same time, the inwardly moving jaws 77 bend the arms 67a of thesealing member, over the edges of the strap, as shown in Fig. 21. As the movement of the levers continues, a position is finally reached where the arms 671J of the sealing memberare bent downwardly into-contact with the strap as shown in Fig. 22 and, in this extreme position, the cutting dies 79 will have forced the outer edges of the sealing member and strap against the jaws with the result that the edges of the strap and seal are sheared, thus `forming an interlocking oint which prevents longitudinal relative movement of the overlapping ends of the strap.

Although certain embodiments ofthe invention have been shown and described by way of illustration, it will be understood that other forms of the invention may vbe constructed within the scope ofVV the appended claims.

lVe claim:

1. ,A sealing device comprising a pair of relatively movable handle `members, and means carried by said members tor engaging and bending an open sealing member applied fue a strap and then shearing the sealing mem- 2. A sealing device comprising relatively movable handle members, and means carried by said members for moving transversely to a strap to bendV an open seal about the strap and then to shear the edges ofsaid seal and said strap.

3. `At sealing device comprising a pair of relatively movable handle members, means carried by said members for bending a seal about a strap upon movement of said members, and means operated by the movement of said members for shearing said seal.

4. A sealing device comprising relatively movable members, separate bending and cutting dies carried by said members for engagement with a seal to bend and then shear the seal, and means for effecting movement of said members.

5. A sealing device comprising a pair of pivotally connected levers, heads mounted on said levers for movement toward and from each other, said heads being adapted to receive a seal and a strap between them, and means carried by said heads for lirst bending said seal and then shearing the edges of said seal and said strap.

6. A sealing `device comprising a pair of levers having oppositely disposed heads, means including a pair oi plates for pivotally connecting said levers, said plates having notches therein to receive a strap, said heads being adapted to receive between them a seal applied to said strap, and bending and cutting dies carried by said heads for bending said seal about the strap and shearing the edges of the seal and strap.

8. A sealing device comprising relatively movable members, means for holding an open sealing blank between parts of said members, and means carried by said members for bending` and closing said blank upon relative movement of said members and then shearing the edges of the strapjand the seal.

9." A sealing ydevice comprising relatively movable members, oppositely disposed jaws carried by sait; members, and means carried "l members for elle/cting` the resiliently l ot an open sei. f 1g bla-nk between said j aws during' the application ot said device to a stra'o.

l0. LA sealing de ice comprisinpr a pair of relatively movable handles having opposite- ]y disposed hea-ds, and means operative in certain relatfve `positions ot' said handles tor automatically holding an open sealing` blank between said heads.

ll. d scali-lne; device comprising,r relatively n'iovable meml rs having oppositely disposed jaws, and means cooperating' with said members for normally maintaining,T a predetermined relative separation of said jaws, said means beine; ,rative upon a further separation ot said j aws ttor holding a sealing blank between said awe.

12, il. sealing` device comprising a pair of pivotally connected levers having' oppositely disposed jaws, and means tending normally to maintain a predetermined separation of said jaws, aid means being; operative upon further separationof said levers lor holdingr a sealing' blank between said aws.

i3. A sealing' device comprising' a pair of pivotally connected levers having' oppositelj. disposed jaws adapted to receive a seal between them, one ot said levers having a recess, and a resiliently mounted member carried by the other lever for automatic engage- 1 ont with said recess upon a predetermined separation of said levers.

lll. :l sealing' device comprising a pair of pivotally connected lev'rs having oppositely disposed jaws adapted to receive a seal between them, one of said levers having;r a recess, and a resiliently mounted member carried by 'the other lever for engagement with said recess upon a predetermined separation ol said levers, said recess being inclined on one fide to p nitI further separation otrsaid levers and said jaws under the restraint of said resiliently mounted member.

l5. il. 0' device comprising; relatively movable heads having' inwardly directed jaws arranged to engage and close the side of arl open seal, cutitngg dies located beneath and spaced downwardly from said jaws, and

'leans tor elifectiire` relative movement of said heads.

16. A sealing' device. comprising' relatively movable heads having;Y inwardly directed jaws, cutting; dies located beneath said jaws, and means for ertoe-ting relative movement of said heads, said jaws beingr provided with notches located opposite said cutting' dies.

l?. A sealing device comprising relatively movable heads having inwardly directed jaws, cutting` dies located beneath said jaws, and a seal supporting.saddle located between said cutting` dies.

18. A sealing device comprisingT relatively movable members having an opening therebetween to receive a scaling blank consisting of a base and side legs, j f. carried by said relatively movable members 'for engaging said sidelegs and bending' them inwardly to close said side legs of the blank, and separate cut ting dies located beneath said jaws lor shearingl the edges of the closed seal.` i

19. A sealing device comprising` relatively movable heads having' inwardly directed relatively movable jaws adapted to c'l'lect the inward bending' ot the lef ol a charmelw shaped sealing:r blank into parallel relation with Yhe base of the blank, and cutting dies carried by said heads Ylor engaging; and shearing' said seal after a j ncdetermined movement et said jaws.

20. ifi sealing device comprising a pair oil relatively moval'ilc hea ds havingY inwardly directed relatively movable bending jaws adapted to engr-age and bend the sides ot an open seal, said jaws having' notches therein, and cutting' dies l cated opposite said notches r cooperation therewith to el'l'ect the ciu j ot said seal upon inward movement ol beading` jaws.

A. sealing device comprisingy a pair ot relatively movable heads having inwardly direttet bending jaws with recesses beneathv them, said bendingl beingl adapted. to engage the side legs ot an open channelshaped seal, said aws havingl notches therein, and cutting' dies `carried by said heads opposite said notches 'for cooperation with the edges ot' said notches to ellect the shcaring ci the edges of said seal alter the sides thereot have eeen bent `in iardly by relative inward movement et said bendingi jaws.

i sealing device tor applying a seal to a strap, comprising` a pair ot' relatively fle heads having inwardly directed bending' jaws adapted to engage and bend the side legs ot a chanucl-slnlpedlseal, said heads having passages 'formedtherein, cuttine` dies removably located in said passages and having their cutting,1 edges located bc neath said jaws, and means for opera-tingr said heads to etl'ect the cutting` ot a seal by said cutting dies and the bending ot the seal by said i1 sealing device for applying a seal to a strap, comprisng a pair ot' heads having passages therein, a pair of cheek plates, pivot pins engaging said heads and said cheek plates, cutting dies mounted in said passages, said dies hav ing` notches therein to be engaged by said pins.

2l. A sealing device for zlpplyinj.,r a seal to a strap, comprising a pair ot' rela-tively movable heads, a pair ol 'cheek plates mounted on op pcsite sides oli said heads, a pair of pivot pins each engagingr one of said heads and both of said cheek plates, and retaining plates mounted on the outer sides ot' said check plates, said pins having grooves adapted to be engaged by parts ot said retaining plates.

ros

25. A. sealing device for applying a seal to a strap,comprising a pair of relatively movable heads, a pair of cheek plates mounted on opposite sides of said heads, a pair of pivot pins each engaging one of said heads and both of said cheek plates, and retaining plates mounted on the outer sides of said cheek plates, said pins having grooves adapted to be engaged by parts of said retaining plates, said retaining plates having resilient portions adapted to extend over the edges of said cheek plates.

2li. A sealing device for implying` a seal to a strap, comprising a pair of relatively movable heads having oppositely disposed passages therein with shoulders at the inner ends of' said passages, cutting dies .mounted in said passages and having parts engaging said shoulders, said cutting dies being insertable in said passages only from the ends thereof opposite said shoulders, and means for detachably retaining said cutting dies in said passages.

27. A sealing device for applying a seal to a strap, comprising a pair of relatively movable heads having inner curved faces, said faces being provided with oppositely disposed recesses, a traveling pin mounted in said oppositely disposed recesses, a cheek plate pivotally connected to each of said heads, and means for effecting relative angular movement of said heads.

28. A sealing device for applying a seal to a strap, comprising a pair of relatively movable heads having inner curved faces, means for pivotally connecting said heads, said.

curved faces being provided with oppositely disposed recesses, a traveling pin mounted in said oppositely disposed recesses, and means for effecting relative angular movementJ of said heads.

29. AA sealing device comprising a pair of relatively movable heads having inwardly directed jaws for engaging the sides of a seal, a saddle member pivotally mounted always midway between said heads for engaging the betteln of said seal, and means for effecting relative angular' movement of said heads.

3.0. A sealing device comprising a pair of relatively movable heads having seal engaging parts and provided with oppositely disposed curved surfaces, a saddle member mounted between said heads for engaging the bottom of said seal, said saddle member having curved surfaces adapted to coact with the curved surfaces of said heads, and means for effecting relative angular movement of said heads.

3l. A sealing device comprising a pair of relatively movable heads having inwardly directed seal engaging parts, a pivot pin engaging each of said heads, a connecting plate engaging said pivot pins, said heads each having a. curved surface concentric with its pivot pm, a saddle member mounted between said heads for engaging the bottom of said seal, said saddle member having curved surfaces adapted to ride on said curved surfaces of said hea-ds, and means for effecting relative angular movement of said heads.

32. A sealing device comprising a pair of relatively movable heads having inwardly directed seal engaging parts, a pivot pin engaging each of said heads, a connecting plate engaging said pivot pins, said heads each hav-V ing a curved surface concentric with its pivot pin, a saddle member mounted between said heads for engaging the bottom of said seal, said saddle member having curved surfaces adapted to ride on said curved surfaces of said he: ds, means for effecting relative angular movement of said heads, and means independently of said curved surfaces for retaining said saddle member between said heads.

A sealing device for applying a seal to a strap, comprising a pair of relatively movable heads having inwardly directed jaws adapted to engage the sides of a channelshaped sealing blank, cheek plates pivotally connecting said heads, a saddle member pivotally connected to said cheek plates and located between said heads for engaging vthe bottom wall of said sealing blank, means for effecting relative angular movement of said heads, and means for guiding said heads in symmetrical relation to said-saddle and said sealing blank during said relative movement.

Sil. A sealing device comprising a pair of relatively movable members, connecting means on which each of said members is separately pivoted, said members being adapted to receive an open seal and a` strap between them,and means carried by said members and adapted upon relative movement thereof to bend the seal about the strap and then shear the edges of the seal and the strap.

35. A sealing device comprising relatively movable heads having inwardly directed jaws adapted to receive a seal between them, cutting dies located beneath. said jaws, means located between said dies for supporting a seal, and means for effecting movement of said heads inwardlytoward each other.

ln testimony whereof, we have subscribec our names.

CHESTER M. MACCHESNEY. JOI-INIEKERN OTT.

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