US3036306A - Stapler device or machine - Google Patents

Description

May 29, 1962 N. s. CLAY STAPLER DEVICE: 0R MACHINE Filed Aug. 4, 1960 2 Sheets-Shea?I 1 Q 50 U P iufm- Ni -Il LJ 1...!

Y Z6 I I 5! INVENToR.

A /vA/m/v 5. CLAY FIG. 3 BY May 29, 1962 '3 N. s. CLAY 3,036,306

` STAPLER DEVICE 0R MACHINE Filed Aug. 4, 1960l 2 Sheets-Sheet 2 INVENTOR. /VT/-MN 5. CLAY United States York Filed Aug. 4, 1960, Ser. No. 47,438 4 Claims. (Cl. 1 3) This invention relates to stapler devices or machines.

Staplers often comprise a staple magazine and staple cover pivoted thereto and prow'ded with plunger means to eject the staples, and means to removably and pivotally latch the interpivoted magazine and cover to the hase which carries an anvil, so that the magazine and cover may be used separately of the base, as a tacker. Users of such machines, as heretofore made, have had difficulty in connecting and disconnecting the interpivoted magazine and cover from the base.

It is hence an object of this invention to provide a stapler of the character described provided with a highly improved releasable latch mechanism for pivotally connecting the intel-pivotal magazine and cover, to the base; the construction being such that the latching and releasing of the magazine and cover may be easily and quickly accomplished without need vfor skill or study or strength, and by an extremely simple manipulation; the construction being such, furthermore, that when the magazine and cover are latched to the base, after each stapling operation, the magazine is pressed by a spring mechanism, back to a position parallel to yand spaced above the base.

Another object of this invention is to provide a stapling machine of the character described in which the spring mechanism for moving the staple magazine back to parallel position relative to the base after a stapling operation, is utilized to retain the staple magazine and cover in latched condition on the base.

Yet another object of this invention is to provide in a stapling device of the character described, a pawl held in position latching a pivot pin on the staple magazine, by spring mechanism, `and said pawl being provided with a button adapted to be pressed by a finger of the user to rotate the pawl against the pressure of said spring mechanism, to release the pivot pin and permit removal of the magazine and cover from the base; said device being provided further with means to guide the pivot pin to latching position, and said pawl having a finger provided with :a latching hook to latch the pin on the magazine, and provided with cam means to permit the pivot pin to engage the cam means and rotate the pavvl against pressure of the spring mechanism, as the pivot pin is'moved toward latching position, until the pivot pin passes the hook of the ringer, to permit the spring mechanism to snap the hook of the nger into latching engagement with the pivot pin.

Still another object of this invention is to provide a device of the character described in which the pawl is not mounted on any pivot pins, but is held in operative assembled relation to the `device by a spring mechanism.

A further object of this invention is to provide a strong and rugged device of the character described, which shall be relatively inexpensive to manufacture, easy to manipulate, assemble and disassemble, and which shall yet be practical and eicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

'I'he invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of invention will be indicated in the following claims.

arent N ice In the accompanying drawings in which is shown an illustrative embodiment of this invention,

FIG. 1 is a side elevational view of a stapling device embodying the invention;

FIG. 2 is a cross-sectional view taken on line 2-2 of FIG. 1;

FIG. 3 is a cross-sectional view taken on line 3 3 of FIG. l;

FIG. 4 is a vertical longitudinal cross-sectional View of the latching mechanism in latching position;

FIG. 5 is a view similar to FIG. 4, but showing the pawl lpressed to releasing position; and

FIG. 6 is a perspective view of the base bracket for the stapling machine.

Referring now in detail to the drawing, 1li designates a -stapler device embodying the invention.

'Ihe same comprises a base 11, a staple magazine 12 and ya cover 13 provided with usual plunger means (not shown) for driving staples from the magazine.

The base 11 comprises a member 15 made of die stamped sheet metal or the like material. Said member 15 has a top wall 16 which slants somewhat forwardly and upwardly. -Extending from the top wall are side walls 17, a front wall 18 and a rear wall 19. Said side, front Kand rear walls are curved transversely and have lower edges.

Attached to the underside of the rear end of the base, `as by rivet 20, is a pad 21 of rubber-like material having portions 22 contacting the under edges of the rear wall 19 and adjacent portions of the side walls 17.

Adjacent its front end, said top wall 16 has a depression 24 for a usual staple anvil 25.

Adjacent its rear end, wall 16 is formed with a longitudinal, rectangular depressed wall 26. Said wall 2,6 is formed adjacent its front end, with a transverse slot 27. Rearwardly of said slot 2.7, wall 26 is formed with a round hole 28 located on the longitudinal axis of the base. Rearwardly of hole Z8, said depressed wall 26 is formed with -a longitudinal slot 2.9 in line with hole 28, and terminating short of the rear end of said depressed wall.

Fixed to the top of depressed wall 26 is a base bracket 30 having a bottom wall 31 contacting and nested on the upper surface of said depressed wall and welded or otherwise attached thereto. Extending up from the bottom wall 31, are parallel, vertical side walls 32 having upwardly and forwardly curved top edges 33, and front edges 34. The bottom wall 31 is 4formed with a transverse slot 35 registering with slot 27 and with a round hole 38 registering with hole 28. It is also formed with a short slot 39 registering with the front end of slot 29 and terminating rearwardly of the front end of slot 29.

Contacting walls 26, 31 are formed adjacent their rear ends with registering openings 26a, 31a receiving a rivet 4d which attaches the horizontal rearwardly extending foot 41 of an angle shaped stop member 42 to the top of said wall 31. Extending up from the forward end of foot 41 is a flange 43 having an upper edge 44 disposed below the upper edge 33 of side walls 32 of the base bracket.

Side walls 32 are formed adjacent their 'rear ends, with outwardly pressed walls 45 forming inner downwardly extending grooves 46, each having an upper flaring mouth 45a yand a half round narrower lower end 46b.

Extending loosely through registering openings 28, 38 is a pin 5@ having a head 51 at its upper end, and a head 52 at its lower end. Interposed between wall 31 of base bracket 30 and head 51 and surrounding pin 5d, is a coil compression spring 53 of increasing diameter toward Vits lower end.

On lower head 52 is a washer 54. Assembled with the ing the transverse pin 76. Said pin Y .adapted to projectintogrcoves 46. Y n Y Y "ToV connect the interpivote'd staplelmagazine and cover z to the base, the pin 70 is Ymanipulateki so that its ends 70a move,down through the flaring portions' 46a. of

grooves 46.' As the centerY of thejpin 711 contactsedgeVY 3 base 11, is an operating member 55 having an intermediate portion 56 formed with a hole 57 through which pin 50 passes, and resting on washer V54, and located beneath the depressed wall 26. At the forward end of Asaid intermediate portion 56 is an upstanding finger lor ange 58 passing upwardly through registering transverse slots '27, 35. The upper edge 58a ofange 58 issubstantially at the level of edge 44 of flange d3.v` Said intermediate portion 56 contacts the underside of wall 26 adjacent to its slot v27. j ,A

i At the rear endy -of said intermediate portion 56, is .a downwardly extending web '6d from the lower end of which extends rearwardly a tongue`61 disposed below wall 26 in spaced relation thereto. I

Also assembled with the base is a pawl 64 comprising a portion 65 disposed in a vertical plane `and a push button portion 66 at one end of the vertical portion in a plane at right Vangles thereto.' r Saidportion 65 has a front nger 67 passing upwardly through slots Z9, 39, an intermediate portion 68 disposed in slot 29-and below wally 31 of bracket Sil, and lying over tongue 61, and a rear portion 69 projecting downwardly and rearwardly, and disposed in back of the rear end of Vsaid tongue. Y

The operative position of pawl64, hookingly engaging a transverse pivot` pin 70 on theY staple magazine 12, is illustrated in FIGS. 1 and 4. This is the normal position of the pawl. Portion 65 of Vpawl 64, has a forwardly extend-ing lug 71 at the lower, front endY of iinger V67, located in the forward end of slot 29 and eugagingthe `underside of wallV 31 just forwardly of slot 3:9,` in the engaging Vor normal position of the pawl, asY shown in FIG. 4. The rear lower end of finger 67 contacts the rear of slot 39. V Y

Portion 68 has an upper straight V,edge 72 extending rearwardly of iinger 67 and contacting the underside of wall 31, insaid engaging position ofthe pawl. V Extending 1 from the rear end of edge Y72 is van upper Vstraight edge Y 73 disposed at an angle .ofabout l5? tothe underside of wallV 31, in said engagingY orY normal condition of the pawl. L

At the middle of the underside of portion 68 is a down.- wardly projecting lug V7d contacting the upper side of tongue 61 adjacent the rear endY ofthe latter. Button 6 6 iselocated below and rearwardly oftongue 61. Button 66 may be square in shape, if desired. A 1 i t will -now berundervstood that spring 53`p`ressesV pin upwardly so that tongue 61 presses up on lug 74,10 rotate pawl 64 about the fulcrurn point 75 at the junction of edges 72, l73, to keep edge 72 and lug 71 in Contact with Y wall31.,

ItV will be noted that fulcrum 75 is disposed rearwardly of-lug 74 as shown in the drawing. I p Y o At the upper end of finger 67 is a rearwardly "extending hook 76 xhaving a curved hooked under edge 77 ,andan upper downwardly and rearwardly slanting edge 7 8.

of grooves 46'when the magazine is assembled. v

The -staple magazine 12 hasside walls 81, and arb'ottom wall 82. Y Forwardly ofthe rear end of the magazine', Yits side walls `51 have downwardly extending ears 83:V carryilfhas vends .70a

78,pawl64is rocked in aV clockwise directionLl-ooking at fulcrum 75, to the position of FIG. 4, in which position the pin is locked and the magazine cover cannot be removed.

The bottom wall of the staple magazine contacts the upper edges of anges 43, 58, and hence spring 53 normally keeps the magazine parallel to and spaced above the base. VHowever when the stapler is operated, the magazine will pivot about the axis of its pin '70, causing depression of ange 58 and increased pressure on spring 53 to again lift the magazine when hand pressure is removed from the stapler.

To release the magazine-cover, it is merely necessary to pressV up on button 66, causing the pawl 64 to rock in a clockwise direction about fulcrum 75, depressing tongue 61 and disengaging Vhook 76 from the pin 70 to permit lifting out the magazine-cover.

lt will thus be seen that there Vis provided an apparatus in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As possible embodiments'might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted Vas illustrative and not Yin a limiting sense. Y

I claim:

l. In a stapling device, a base having a wall, a base bracket having aV bottoml -wall fixed to said wall of the base, said bracket having upwardly extending side walls formed with guide grooves and with bearing means at the ends of Ysaid grooves, said wall of said base being formed with a hole and with a longitudinal siot, said bottom wall of the bracket being formed with a hole registering with the hole in ksaid wall of the base, and with a longitudinal slot registering with partrof the longitudinal slot in said Wall ofvsaid base, a pinpassing through said registering holes and having heads at its upper and lower ends, a

member having a portion formed with a hole registering withsaid aforementioned'holes` and through which the pin passes, said portion being Vinterposed between the lower head ofthe pin and the underside of said wall of the base, a coil compressed spring interposed between the bottom wall of the bracket and the upper head of said pin, said member having a rearwardly extending tongue, a pawl having an intermediate portioninterposed between said tongue and the underside of'said 'bottom wall of the bracket and extending in thelongitudinal slot in said base wall, said pawl having a iinger extending up through the registering longitudinal slots and provided with a hook i crurn contacting the underside of said bottom wall, and

55 The'staple magazine 12 and cover 13Y may be of usualV construction, being interpivoted by atransverse pivot pin Y The hook 76 holds thepin 7i! seated, inl portions 46h, I

FIGS. 4 and 5, about its fulcrum 75therebyicausing Vlug 74m depres'sJ-tongue61y and-tensionffurther, the,

spring 53. When the pin 76 passen the hook 76spring 5.3, j causing upwardpressure of the tonguef61 against lug'74,

` willV causecounterclockwise VrotationofV the pawl about a lug disposed forwardly of thefulcrumcontacting said tongue, in combination Witha staple magazine having a :fixed pin, Vsaid xed pin Vhaving ends engaging said bearingmeans Vand said hook engaging said pin to hold its ends on said bearing means, saidwalls of said base and bracket having registering transverse slots, and said memberv having a flange at its forward 'end projecting up through said'regis-tering transverse slots and engaging said Y magazine.

2. AThe combination of claim l, in combination with a stop iixed to said bottom wallrearwardly of said guide Vgroovesand engaging said magazine.

Y V3.74In a staplerra base, a staple magazine, a`pin on said staple magazine, said baseV having guide means for said pin, `and bearing means forthe pin at the end of the .guide-means, a pawlrockingly mounted on said base'and Vhaving bearing means to'releasably engage saidrpin and hold said pin on said ,rst mentioned bearingV means, spring means to move( said pawl "intoV pin engaging posi- Ytion, therebyremovably connecting said magazine torsaid base'forw rotation `about the axis ofV said pin, said pawl having'means in the path of thepinnmoving throughthe guide meanstoward'said first bearing means, to' move 3,036,306 5 6 said pin engaging means out of the guide means to per- References Cited in the le of this patent mit said pin to engage said rst lbearing means, said spring UNITED STATES PATENTS means including means to resiliently bias said magazine upwardly relative to the base, forwardly of said pin. ggg; i h; 212 4. The combination of claim 3, in combination with 5 g s xed stop means on the base engaging the underside of FOREIGN PATENTS said magazine, rearwardly of said pivot pin. 1,004,065 France Nov. 2.1, 1951

Images