US2358317A - Stapling machine - Google Patents

Description

Sept. 19,Y 1944. s. A. CROSBY 2,358,317

STAPLING MACHINE Fi-led July 1o, 1939 s sheets-sheet 1 .N owhmv R Y I l o E Esqwwh um N. .m I; x E O @n g -1. dl Rw. .n HIMI- Hj 'VII M mi n@ l A l|f|MMI|L I| lllll llhlrili+lu ma@ s. A.` cRosBY STAPLING MACHINE Filed July 1Q, 1939 Sept. 19, 1944.

3 Sheets-Sheet 2 INVENTOR AToRNEY Sept. 19, 1944. s. A. cRosBY STAPLING MACHINE 3 Sheets-Sheet 5 Filed July 1o, 193s NVENTOR f ATTORNEY Patented Sept. 19, 1944 UNITED r Stephen A. Crosby..JacksowlligltgN; Y.. asfsignor to lSpeed Products Company; New York,

ApplicationJuly'105l939; SeriaLNfr. 283,693

woei-ms. (or 1:a

'Ihe presenti invention pertains to staplingi machines and the dominant objectthereois# realized in the provision of an improved andi serviceable staplingY machine: wherein' the swingable arm thereof comprises cornpl'mentaryI sec-1 tions defining a staple'magazine and*L acover' slidably or reciprocablyr connected4k to the-maga*- zine whereby convenient'l access-maybe readilyf had to the staple carrying rai1-inthe` maga zinelby rearwardly and rectilinearly displacing the cover relative to the magazine. Another' object of the invention is to vvprovidea stap'lingv machine wherein the magazine'ha'sf track means for slidably and rectilinearl'y guiding the cover' andY wherein a slidablyguided' follower' is".Vl re= ciprocated' upon reoiprocation ofi the: coverl due'l tothe action of an extendible springV trained over manually shiftable latch meansi adapted t`o interlock with keeper means on themaga v` zinev to sustain the'cover in4 a closed or" openvk position relativeto'l the magazine: A" further object ofthe invention resides' in the provision of means for automatically shifting'the'covei rearwardly of the magazine to open thelatter" upon releasing the shiftablelatchme'ans when, the' cover isV in a position closing the maga"- zine. Further objects,.f`eatures and. functional" and' structural advantages-ofL the inventiomwill' be. readily understood from' the"teaeln'g'sofitle' Fig.' 2b is a transverse4 sectional View) on' the" f line`2D-2b`of`Fig`l 2.

Fig. 3 is a perspective view of" theY stap'ling machine showing the complementary" sections of the swingable arm thereof inI aclosed"r'e'la"l tion;Y

' Fig;A 4--is a perspective view of thestapli-ng mar 5-0;

chine illustratingl the complementary' upper andi lower sections ofthe swingableffarm thereofv in'A an open relation.

Fig. @is afragmentary exploded'vi'ew' offtheMh magazine in perspective:

Fig; 4iiisr ai fragmentary perspective view of the rail. Y c o Fig;l 5V is a' transverse sectionall v-iewsubstantially;` onvlthe' line 5-1-"5foff'Fig-z'l.,

o Fig.'` 6= is; a'seotional"viewx onn the liner` 6--6 of ligllz,` l 7l is aV sectional-f view Fig.: 1'-

f 8 is ai sectional` viewfonf theline 8--8fof Fig;- l

.9'is1 afperspective'viewl of thefinner part orf railrv housing of' the magazine..

Fig.' 10'; isL a perspective view off theoutside;

part or: guard` ofi the magazine.:

Figui-la isa-perspectivef view-'of the butterflylocking latch-'2 for the complementary sectionsof without any staples.y

Fig: 13is afviewsimilar; to 1igf'1f2vshowing the?upperisectioneoncover inra position' partly opening ithermagazinef-of thel swing'able.- arm.

coven shiftedzto itsfmost rearward positionz Wh'ere it= isA automatically locked;

1'5'is1 anrenlargedl fragmentary'v view of 1 4;` and;

Fig. 16:-v is a'seetional: View oni the: line" I'e-l' swingablearm' A may; besaicll to includercom-Y pl'ementary upper and lower c'omponent'sglthe upperfcomponent orsectionr being the Acover C fori' magazine: M; which: nay:^ -bef said? toy be thelow'er' component ori' section.

strip off staples F31' arefzvrsiidablyr Y,gin ed; The rear end of the rail includ'esa'lug |54 itting' close@` lyiinto arectan'gularfopening I intherearfverare spaced from the depending sides of the rail and dene therewith longitudinal channels 2l, the walls of which slidably guide the depending legs of the staples 22 of theV staple tal face 26 and the front end of the rail is likewise fiXedly retained but at the front end of the inner rail housing I8. For this -purpose each of the sides 26 of the rail isprovided with spaced depending lugs 21 and 2B wliichiit.close.`

ly into the locating recesses and notches 29 and 30 respectively in the bottom wall I1 of the rail housing I8. Thus the rail is' -prevented from longitudinal and lateral displacement relative to its housing and to prevent displacement of the front end of the rail,'lugs 128` are riveted/or slightly upset as is well understood. J; With the rail positioned in -therail housing I8, the latter is arranged inthe outer channeled member or one piece guard Ginsuch away. that the inner transverse face 3| of the front wal1.3'2 is against the front transverse? faces 33 Aof-'the sides I9 and the projecting lugs 25 thereof. ThusA arranged, the upper faces 34 of -lugs25 are under and against the forward ends of the inwardly overhanging interrupted flanges 36 of the sides 31 of the guard whichV are spotwelded' to the spaced sides I9 of the rail housing' I8 and with the rail housing so located andV xedlyvattached' to the guard, openings 38Y of thea ears 39 of sides I9 ofthe rail housing IBiareJin'alin'e-l ment with openings 40 of the ears'wllhofithef sides L31 of the guard and the'fbores of these alined openings are rotatably associatedqwithi ,and are guided by the fulcrum lpin |2. jHence.; the magazine mayY be saidftolbepivotally. sustained vby the base B. 'f' 'r f1 Where the rail is located in respect tothe hol'iS-.f ing I8 and the latter is xed to the outside guard G the forward transverse face-42 offthe'railv is spaced from the inner transverse. face 3| Vof `the. front wall 32 of the vguardgthus providing 'a verti-cally arranged staple raceway 43: inwhichv theY forward staple 22 of the .staple strip I3 is arranged at they completion of'each ,complete 'return stroke of a staple ejeoting blade..44 carriedby the slidably guided plunger or .driver 4generally designated P comprising the Uxshaped member 45, reciprocablyjguided between the sheath 46 and the case 41 of the cover C, that: is, end faces 48 (Fig. 1b) of the sides 49, of :the case 41 serve as rectilinear bearingsV for the end faces 56 of the sides 5I ofthe Ushapedfmernber 45 of the'driver P to which the blade 44`is fxedly attached.

The blade 44'is also'slidable relative to ftheinner transverse face 52 ofthe front transversewall 53 of the sheath 46 having its rearwardly extending sides or wings 54 closelyxstraddling; sides 5I of the -driver P and the sides 4,91ofxthecase 41 and suitable dowel pins .or rivets 55.V are' utilized. to xedly fasten or holditogether the sheath 46, and case 41 eachAof-which may belsaid to be a-channeled member, the channelpf ther sheath facing rearwardly while thechannelof the casev faces downwardly. .l p

In thev assembled relation of the driveror plunj ger P,Sheath 46 and case v 41, .thefront end faces sa' of the lower'.portionsV 51,0ffsides4qjof the case 41 cooperate 'Wththe transverseface 5 2Y of the front wall 53 of the sheath to characterize a gap to vertically guide and facilitate the reciprocation of the blade 44 which is normally held in a fully raised position by the helicoidal spring 58 having its upper end appropriately retained by the suitably notched and fixed eXtension 59 projecting forwardly from the downwardlyand rearwardly curved upper wall 6 6 which is integralgwith the spaced dependingside Walls 49 which have their lower portions' or margins'51 projecting appreciably below the sides 54 of the sheath 46 while the lower end of spring 58 is `retained `or held by the offset lug 6I extending rearwardly of and carried by the movable U shaped member o f the plunger P to the upper VVend* of' which isfastened at metal plate 64 to which cap 62 is secured. Hence upward displace- 5 mentiof -th'eplunger is limited by the fixed extension 59 which cooperates with a lug 63 projecting from each wall 5I of the plunger P while Y the upperface 65 of the sheath 46 acts as a stop for plate 64 to limit downward displacement of the-plunger. Y

As previously stated, the cover C can be slidably and bodily shifted to the rear of the magazine in order to obtain access to the fixed rail, provided of course, the slidably guided liftable inclined locking latch.V 61 which is carried by the cover has itslower lipportions 68 removed from thefront andalined notches 69 which interrupt theanges or seats 36 of the guard. This so called butterfly latch 61 is disposed transversely of the cover ,andextends through the alined inclined and elongated guide slots 16 and the enlarged-i'rregularly shaped relief slots 1I (Fig. 5) in the sides 54 and 49 -of the sheath 46fahd case 41l respectively and portions of the spaced sideY 54 of sheath46 .adjacent the alined slots 1U are receivable in the reentrant recesses 12 and are straddledv bythe walls of the latter when lips 58 respect to the magazine, the lower faces 15 (Figs.

2b,v 3, 4 and 6) of the sides 54 offthe outside sheath '46 Ymovably rest on the seats or flanges 36 of the guard, while the transverse pin 16 xedly carried by the marginal portions 51 has its ends .11 (Fig. 2b) slidably guided in the longitudinally disposed slots '18 defined by the lower horizontal faces of the tracks' or anges 35 of the guard G and the upper faces 26 of the sides VI9v of the rail housing I8. Moreover the outer en` largeddiscshaped ends 19 (Figs. 1, 4, 6 and 7) of pins or rivets fastened to the marginal portions 51 of the sides 49 of the case 41 are also slidably guided by the upper and lower horizontal walls or track means of the. long slots 18 in thespaced sides of the magazine as the cover is moved forwardly to close the magazine or rearwardlyto expose the rail.V

According to the invention, a staplecarrying channeled shaped-follower block S'I is slidably guided on therail and is moved automatically rearwardly as the cover is moved to its open position and is moved automatically forwardly as. the cover is vurged andinoved toits closed position. In this connection it will be observed asseoir:

that. a helicoidal.. spring: 821s. looped. or: trained. over the.v curved grooved'. bearing; 8.3: of latch. 61; so that its lower end 84 has its terminaleye`85. connected to.Y a hook .86' projecting from the upperwall'of` the. follower which. has itssides/8.6; (Fig. '1)1, providediwith inwardlyy turned flanges 81.

thus. interlocking Ywith the. bottom. facesv of.. the.

rail-` to preclude upward displacement.. of the. fol.- loweras it reciprocates during; opening and Yclos;

ing of.` the cover;V The upper legofgspring 8.2; has. itsterminal 88 (Figs; l and18). fastenedy to a cen-- tral reducedj partof` atransversely'arrangedv pin..

8.9, xedly carried. by; the. marginal portions 5,1. o the. case; 41 and the outer ends` ofl pin 8 9; are, receivable in; the .alined and long: spaced. slots g 1.8;; and. slidablyy guided; bythe.; walls or trackv means;` thereof when. the cover. is. rectilinearly displaced.. relative to` the. magazine...

Wliere. the; railsupports no staples. (Fig. 12).- and; the c over is mclosed, the lower leg of springr 82;: has, urged the iollOiVr toits extreme. forward; positionL thatV is the forward; end ofl the. follower isy in alinement with thew forwardV end, of the rail.` in. that alinedshoulders; 9IlV of the yfollower abutv the overhanging .endsof the rearpinv 89 are; withinthelong slots 18 in the spacedsides.- of the.; magazine.

lIn';v caseraccess is desired tothe rail, the latch` B1;- is first-unlocked This is accomplished by grasping wings 9,2-of the-.latch andlifting upf wardly `toremove lips.: 68 fromV the. notches. or

keeper means 69. Thereafter; the, cover may be,v

moved. rearwardly. whereby the.r lower faces (Figs. 2? V,and 4t) of. the sheath. slidablymove. over theguideflanges 3.6.. Asithe cover moves. rearwardly therear endof the. case 451 starts; to overhang the rear; end off the magazine.- Therefore the outer ends of pin 89.as.well1as. the outerr ends or discsll` or; heads (Fig. 4). of,

rivets. 80A fastened substantially. centrally; of' the p lower margins 51. of the case. leave.- the. guideV slots. 18;.whileother'disc. portions` 19 of the remaining. rivets 8.0;. carried. by.A the case together-` with the outer. terminalsll of. the pin. 1B re-M main intheseguide slots/18- at. aatimewhen the latch E1 reaches. therear notchesVY 13at which time the latch. dro-ps automatically therein-to prevent furtherA rearward displacementl of the cover (Figs. 4 and 15). Hence the cover and magazinev are again= locked against relative-dis-Y placement. Where however the cover overhangs the-magazine-the cover cannotbe fully detached from the magazine inthatf lips: 68 of latch 61 cannotl bepa'ssed.y over the stop lugsv 13 (Figs. 9 and 15) at therear.V of f the-guard'.

During rearward. displacement tof theV cover the lowerflegV of spring 82'slidablydrags thelfollowerV 8 I; rearwardly.y ThusfftherailA saccessible togmount. thereon astaplestrip4 I3; To retract the cover. after azstaple strip is. supplied to the rail.A the operatorV Athereafter again lifts locking latch 61 from notchesmrkeeper means.1'3 to' unlock the latter .from therear. end l of the guard anfk shifts-.the cover: towards theifront-part= of'y Also w thegmagazine.. Discs or. heads. 19. andthe outer terminals ofrear'pin 89: which. were previously out; ofl the. alined. slots; 1 8:.when the .arm was` open; nowV reenter these slotstoA be guided. thereby .asj the.;O cover: ismoved. to its fully closedand pre.-

determinedposition which takes place when ter.'- mina1s1;1.(Fig. 21?); ofthe front pin 16 (Fig. 12)

strike stopl lugsl` 2.5.of the magazine.inwhich.

event lips 68 of the latch fall automaticallyinto front notches 69. of: the magazine andagain the cover and magazine are; locked.

It should-be observedhowever. that asthez cover is1 moved forwardlythe followerv 8l `due to the action-1 of spring 82:- urges the foremost staple.- of the staple strip across theraceway 4'3y and the.

tension.I inthe lower leg of` spring 821'. is such asi tocontinuously urge the follower forwardly when the cover is closed. In such closed relation the staple strip I3. is prevented from upward. clis.`

placement bythe lower margins y51 (Fig. la)v of sides 49 of the case141iand'these margins may besaid to beftelescopically associated with the 'magazine With the cover closed and locked the.

plunger may be depressed to cause its blade 44 y to. eject theforemoststaple againstappropriate clinching indentations in the anvil Il] at which. time'arm A has pivoted downwardly in instances fofV course where they clearing. latchY has its notched-.noseg disposed. in the narrow opening 91` and interlocked with bottom wall I1 of the magazinev (Fig. 16). in which case if the arm is tilted downwardly it depresses shoulder 98' (Fig. l) causing seat-99 ofthis latch to also move downwardly against the free end of' a fixed` leafspring I0!) which becomes stressed, andi upon removal'of' hand pressure from cap 62T, the leaf spring. |903 automatically and pivotally retracts` arm: A: which may be readily disconnected from.V

the clearing latchi 95-by manipulating tail' I0'I whereby tl'lislatclris` tilted counter clockwise causing noseSS: to become disengaged from the Vlowerwall I1 ofthe magazine. and ultimately become freeof the-elongated'opening 91. Under sucl'rcircumstances the base B may be swung approximately: one yhundredand eighty deg-reesY inzrespect to the arm AL to permit the latter to beused as a tacker. Y

More particularly clearing. latch 95 is movably guided; in alined slots |03.- and |84 in the base and in a plate |06 xed'to the base and springl IUD.; normally holds shoulders I'Illt andl of the clearing latch 95: against the fixed plateflll'.. Of coursev as far as the .follower spring 82. isA

concerned, the latter hasia double function as is well appreciated, to wit, one,l it normally urges the .followerforwardly when. the cover is movedv toza, closing position, and two, it automatically urges.r latch 61f downwardly, the bearing ends^83f= off which are movably guided between sides -54'-.`

(Fig. 2) of sheath 46 andfin the4 relief slots 1I in sidesl 49'of the case 41- of the cover' C. It .should be understood ofcourse that 'where the magazine is appreciably vi'llled with staples, and Y latch 51 is removedor unlocked from themagazine, the cover automatically moves rearwardly toiopenthe magazine dueto the automatic contraction of the extendiblehelicoidal spring 82;

Thusthelatter may be said to have an additional1 rfunction of automatically shifting theY coverrearwardly to openthe vinagazine'when thev latch isv removedfrom the'frontnotches or `keeperrneans 69; For purposes of specificationv leaf: spring Illllmay be said to besecured'to an'inner face-of' the channeled base B-byfthe:suitably:A

anchoredistrap I02f(Figsl); *Y

As many changes could be made in the above described construction and many widely dierent. species of structural embodiments .could be de-f vised without departing from the scope thereof,V it is intended that all matter hereinbefore described in the specification and illustrated'in the accompanying drawings shall be'interpreted as illustrative and not in a limiting'sense.

Iclaim.: s V,

l. In combination, a magazine having a rail for supporting staples, a follower slidably mounted on said rail, a rectilinearly reciprocable cover for opening and closing said magazine and including plunger means for ejecting a staple from said magazine, liftable latch means for disconnectably locking said cover and magazine against relative movement, and spring means cooperatin'g'with said follower and latch means to reciprocate said follower during opening and closing of said magazine by said cover and to urge said latch means towards said magazine.

2. In combination, a magazine having a rail for supporting staples, a follower slidably interlocked with said rail, a rectilinearly shiftable cover for closing said magazine and including plunger means for ejecting a staple from lsaid magazine, a liftable llatch carried by said cover and disconnectably associated with said magazine to lock the 1atterand spring means cooperating with said follower and` latch means to hold theY latter removably interlocked with said magazine in the fully opened or closed relation of said cover and to slidably displace said follower during opening r closing of said magazine by said cover.

3. In combination, an arm'comprising a magazine having a rail for supporting staples, a follower slidably mounted on said rail, a rectilinearly displaceable cover for opening and closing said magazine and including plunger means for ejecting a staple from said magazine, means to limit forward and rearward rectilinear displacement of said cover relativeto said magazine, liftable latch means carried by said arm, and spring means cooperating with said follower to shift the latter during opening and-closing of said magazine by said coverl and cooperating to hold said latch interlocked with said magazine in the fully closed or open relation of said cover.

.4. In combination,-a magazine for holding staples and including keeper means, a cover for said magazine, means rectilinearly guiding said cover relative to said magazine, a staple follower in said magazine, latch means for removably cooperating with said keeper means to prevent displacement of said cover relative to said magazine, driving means for ejecting one of said'staples from said magazine, spring means secured to said cover and followerY for reciprocating the latter during reciprocation of said cover and coopsupportingrail in said magazine, track meansin said magazine above said rail, a reciprocable cover comprising a front sheath and a rearwardly disposed case extending below said sheath and into said magazine adjacent said track means, and means projecting-from said case Vand rectilinearly and reciprocably guided by and receivable on. said track means to permit bodily rectilinear displacement of saidicover relative to said magazine. Y

6. In a staplingl machine, a magazine having spaced'sides including front' and rear. spaced notch means, a staple supporting rail in said magazine, a slidable follower on said rail, track Y means in said magazine above said rail, a reciprocable cover comprising a front` sheath rectilinearly displaceable onsaid sides and having a rearwardly disposed case extending below said sheath and into `said magazine adjacent said track means, latch means carried by said cover and extending laterally of said sheath and adapt-v ed to ride along said sides, means projecting from said case'and rectilinearly and reciprocablyguided and receivable on said track means, and springl means common to said follower and latch means connected to said cover and for displacing said follower towards the rear of said magazine when said cover is bodily moved rearwardly relative to said magazine, said latch means adapted to interlock with said rear notch means to limit said rearward displacement and adapted upon forward displacement to interlock with said front notch means. l

7. In combination, a magazine for holding staples and including keeper means, a follower slidably mounted in said magazine, a rectilinearly reciprocable cover for opening and closing said magazine and including plunger means for eject- Ying a staple from said magazine, means for recf ples, and including keeper means, a follower slidably lmounted, in said magazine, a cover on said magazine, means for rectilinearly guiding said cover for opening and closing said magazine, plunger means'for ejecting a staple from said magazine, liftable latch means cooperating with said keeper means for disconnectably locking said cover and magazine against relative movement, and spring means secured to said cover and cooperating with said follower and latch means and trained over `said latch means to reciprocate saidfollower during opening and closing v of said magazine by said cover and to urge said latch means towards said magazine.

9.,In combination, a magazine for holding staples and including keeper means, a follower slidable Vin said magazine, a shiftable cover for opening and closing said magazine and including plunger means for ejecting a staple from said magazine, means for rectilinearly guiding said cover relative to said magazine, a liftable latch carried by said cover and disconnectably associated withV said keeper means, and spring means connected to said follower and cover and trained oversaid latch means to hold the latter interlocked with said keeper means inthe fully opened or closed relation -ofsaid cover and to slidably displace said follower during opening or closing of said magazineby said cover.

10. In combination, a magazine having a rail for holding staples andincluding keeper means.

a follower slidable on said-rail, a shiftable cover substantially coextensive with-,the length of said magazine for closing said magazine and including plunger means for ejecting astaple from said magazine, means for rectilinearly VAguiding ldisplacement of said cover longitudinally of said magazine, a liftable latch carried by said cover and disconnectably receivable in said keeper means to lock said magazine, and extendible spring means connected to said follower and cover and looped over said latch means to hold the latter interlocked with said keeper means in the fully opened or closed relation of said cover and to slidably displace said follower during opening or closing of said magazinev by said cover.

11. In combination, a magazine for holding staples and including keeper means, a follower slidable in said magazine, a displaceable cover superimposed on said magazine for opening and closing said magazine and including plunger means for ejecting a staple from said magazine, means for rectilinearly guiding said cover relative to said magazine, means to limit forward and rearward displacement of said cover relative to said magazine, liftable latch means carried by said cover, and coiled spring means connected to said cover and follower and looped over said latch means to shift said follower during opening and closing of said magazine by said cover and cooperating to hold said latch means interlocked with said keeper means in the fully closed or open relation of said cover.

12. In combination, a magazine for supporting` staples and comprising front and rear keeper means, a follower slidable in said magazine a displaceable cover for opening and closing said magazine and including plunger means for ejecting a staple from said magazine, means for slidably and rectilinearly guiding said cover relative to said magazine, means to limit forward and rearward displacement of said cover, liftable latch means slidably carried by said cover and having winged means accessible outside of said cover and including a curved body having upper and lower portions, and coiled spring means connected to said cover and follower and trained over said body to straddle said portions for shifting said follower during opening and closing of said magazine by said cover and cooperating to hold said latch means interlocked with said front keeper means in the fully closed relation of said cover and cooperating to hold said latch means interlocked with said rear keeper means substantially in' the fully opened relation of said cover,

13. In combination, a magazine for supporting staples and having spaced sides including inwardly over hanging flanges, a cover for said magazine seated on said flanges and including outwardly projecting means, driving means for ejecting a staple out of said magazine, means for slidably and rectilinearly guiding said projecting means'longitudinally of said magazine, a slidable follower in said magazine, .liftable latch means, and a spring trained over said latch means and connected to said follower and cover for driving said follower to the rear of said magazine-upon opening of said magazine by said cover and for driving said follower to the front of said magazine upon closing of the latter by said cover.

14. In combination, a magazine for supporting staples and having spaced sides including inwardly overhanging flanges, a cover comprising a sheath seated on said flanges and including a case straddled by said sheath and projecting into said magazine, track means, means projecting fromsaid case slidably and rectilinearly guided by said track means longitudinally of said magazine, a liftable latch carried by said cover, driving means for vejecting a'staple out of said magazine, `and a spring connected to said follower and cover and trained oversaid latch for urging said follower rearw'ardly'when said magazine is opened by said cover land for urging said follower forwardly when said magazinev is closed by said cover.

15. In combination, a'magazine for supporting staples and having spaced sides including inwardly overhanging flanges, Va cover comprising a sheath 'seated on said flanges and including a 'case straddled by said sheath and projecting into said magazine, track means, means projecting fromsaid caseslidably and rectilinearly vguided Vby said track means longitudinally of said magazine, arliftable latchv mounted on said covenand a spring connectedto said follower and cover and trained over said latch for urging said follower rearwardlyV when said magazine is opened by said cover for urging said follower forwardly L when said magazine is closed `by said cover, saidl flanges having means kfor interlocking with said latch to limit displacement of said cover relative to said magazine, said driving means for ejecting a staple out of said magazine.

16. In a stapling machine, a magazine for supporting staples and having track means, a rectilinearly reciprocable cover comprising a front sheath and a rearwardly disposed case extending below said sheath and into said magazine adjacent said track means, means projecting from said case and rectilinearly and reciprocably guided by said track means to permit bodily linear displacement of said cover relative to said magazine, means to limit linear displacement of said cover relative to said magazine, and driving means for ejecting a staple out of said magazine.

1'?. In a stapling machine, a magazine for supporting staples and having track means disposed lengthwise of said magazine, a reciprocable cover comprising a front sheath and a rearwardly disposed caseA extending below said sheath and into said magazine adjacent said track means, means projecting from said case and rectilinearly and reciprocably guided by said track means to permit bodily linear displacement .of said cover relative to said magazine, a staple follower in said magazine, a latch carried by said cover, spring means trained over said latch and connected to said follower and cover for reciprocating said follower in response to the reciprocation of said cover, and driving means for ejecting a staple out of said magazine.

18. In a stapling machine, a magazine for supporting staples 'and having spaced sides including front and rear spaced notch means, a slidable follower in said magazine, track means in said magazine, a reciprocable cover comprising aV adapted to interlock with said rear notch means to limit said rearward displacement and adapted upon forward displacement to interlock with said front notch means, and driving means for ejecting a staple from said magazine.

1'9. In a stapling machine, a staple carrying member having an open top, a rectilinearly displaceable cover member mounted upon said staple carrying member for longitudinal sliding movement relative thereto adapted in a forwardly moved position to enclose said top and in a rearwardly moved position to expose said top for the loading of a staplerstrip in said member, a locking member movably mounted upon said cover member and movable between locking and unlocking positions and adapted in locking position to removably interlock with said staple carrying member, stop means effective to limit forward or rearward rectilinear displacement of said cover member, a slidably guided follower in said staple carrying member, a spring interposed between said follower and staple carrying member and trained over said locking member to automatically shift said follower in response to rectilinear movement of said staple carrying member, and driving means for ejecting a staple out of said staple carrying member.

20. In combination, a magazine for supporting staples, a cover substantially coextensive with the length of said magazine and superimposed thereon, means for rectilinearly guiding said cover relative to said magazine, means to limit forward `or rearward rectilinear displacement of said cover relative to said magazine, shiftable latch'means cooperating with said magazine to preclude rectilinear displacement of said cover relative to said magazine, a rectilinear displaceable follower in said magazine, extendible spring means looped over said latch means and connected to said cover and in part projecting into said magazine and connected to said follower for displacing the latter in a direction corresponding to the rectilinear displacement of said cover and for overhanging said magazine during rearward rectilinear displacement of said cover relative to said magazine, said cover having means projecting into said magazine to prevent displacement of said staples in a direction upwardly towards said cover when said cover closes said magazine, and driving means for ejecting a staple out of said magazine. Y

STEPHEN A. CROSBY.

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