US2469054A - Stapling machine - Google Patents

Description

May 3 1949- W. SCHAFROTH 2,469,054 STAPLING MACHINE A 4 Sheets-Sheet l Filed NOV. 19, 1945 ne/VEB SCHA F120 TH May 3, 1949. w. scHAFRoTl-l STAPLING MACHINE 4 Sheets-Shea?I 2 Filed Nov. 19, 1945 H mm F .NF E A VH W. C 5 W .E WE

May 3, 1949. w. scHAFRoTH STAPLING MACHINE Filed Nov. 19; 1945 4 Sheets-Sheec 5 /4/ INVEN TOR.

EKA/EZ 56H4 m70 TH Hfs Mmm/5% Patented May 3, 1949 fSTABLING MACHINE Werner AS charoth, Brookline, Pa., assignorto 'Internatonal Staple and `Machine Company,

Clifton HeiglitSR-Pa., a corporation of Pennsyl- Narnia.

AppleationNoyember 19, 1945, .Serial No...6Z9.,354

(El. E1---49`=) "Glaims.

'This invention .relates 'to 'gstapling 'machines `and particularlyto'the type ,of machine :which is .used to secure 'the .'ilaps or ends of .closedccartons or containers Where the vstationary anvil cannot ,be used.

The invention Tis an improvement over lsimilar machines of my,priorpatents,1o.;280,63fi, .dated 18, 1937., .and "No 2235.808, 'dated March .4. -'19.41., in that the piercing anvils are .directly `actuated Vby .positive .links .and levers instead of .cams .or other .means .and .by .applying the I'foree through lever action instead of cams., the l'ieof the v.anvils and .other operating parts iis considera- .hly extended.

The stapling machine of the type .with which .this invention .is concerned includes, .as .characteristic elements., a pair .of penetrating -anvils `that are .actuated by suitable r`operating .instr-umentalities, .and these are guided Joy appropriate cam tracks in a sliding .plunger :to pierce the material being stapled .and cause .the Yanx/ils to `assume a position whereby drivin-g of the staple thereagainst will fetect a clinching of .the staple .-legs.

The purpose4 of @the .invention is to provide .rnechan-ical means for actuating staple .clinching .anvils through an arc of about 100 degrees, hold- .ing ethem in `the .extreme or .clinching position, .and then ,returning the any-ils to their .original ,positions with `.a `positive ',and, .at .the reame vtime. easy movement, r-in which wear .of the operating parts is reduced to a minimum.

:Due to :the .complex nature `of lthe movement --vvhich isimparted ,to .the Vpenetrating :any-ils dur-- -ing their ,piercing operations, :provide lin-.ks and levers directly vvconnected -'to the .-anv-ils and .a .plunger with cam tracks `for actuat- .ing the .links'andleyers .-I-n yiewrof theiact that .the .staple itself closely .fiollows .the movement of rthe penetrating anyils, l.excessive Wear :is `created upon .the-.cam attacks associated .with the anvils :as in :the prior patents, whereas, by .applying .the force through the ,direct action of links .and ,.levers, this Wear is eliminated.

.'Ihe ole-ject yof this .invention is, therefore, rto provide an .improvedstaplng ,machine-'Which ac- :tuates .anvlls .to-.the clinchingiposition on @the op- ;poste .side .of .materials to .beusecured .-'oy .the .staples, .and then .tonces .the staples through the :layers 'of material L.and .against .the `ani/ils, .which results in the clinching operation forcing .the 'ends of theA ,staples upward ,against the inside suraces .of the material.

More :in Ydetail thisinmmtion 'has in .View .as a Iurther ;ob.eetiv.e.1the ,provision of ,a stapling it .-is necessary to misins .included Vcardboard 4 carton) Atakes zup a machine of `the type noted which includes a Y-rn'ovalole .guide plunger lwith ajlever forcing 'the plunger 'downward'together With 4associated operating nstrumentalities "that 'cause `the plunger to `be "moved into position, Vwhereby levers pivotally mounted on the casing 'and connected to 4anv'ils by links, are actuated 'by cams .on the levers extending into 'cam tracks in `the plunger to force the piercing anvils .through the material,

yand assume their ultimate position prior to the driving of the staple.

Associated `with 'this Iphase .of .the stapling .niachine is an extremely .important objective Which aims at the provision 'of amachine in winch 'the operations of .the penetrating .anviLs staple .guide `plate and staple driving mechanism are accurately and positively synchronized so as to insure of proper Voperation .of .the machine.

Yet .another object is assoc'iatedwith .this phase of .the invention and .deals .with the .provision .of novel and improved driving .connections .leetvveen 'the vpenetrating `anvils .and the ,operating instrurnentalities thereior.

In order to .meet presenttday conditions .prevailingin the rnanumiture ocardboard cartons,

. and .other .similar .packages Whichalze .intended to 'be closedby the stapling machine of this .invention, and particularly .View `of the toughness of 'the .materials which .must .be .-.pielced .in `order to carry out 'the stapling operations, it is necessary that .the operating instrumentalities of the niachine loeeective ,todrive .the Ipenetrating .anvils and the .staple .driving vmechanism .withu extremely high velocity.

The .creation .of these velocities gives rise to the setting up of ,a lange number of sharp vshocks .and jars, which, taken up bythe machine .alone ,greatly reduces the service 4lite thereof.

vAccordingly .the .intention has .in view, .as a highly important objective, the provision of an arrangement .-in which ,the material being {oper- :ated upon (such ras .the flaps fof a corrugated ,large poration .oi .the shocks ,andgiers which eraan inevitable incident tothe operation of the machine..

Yet another :highly impOntant-ebieCt rof the in vention is the provision of a novel and improved .casing .structure that-:is designed to Vhouse ythe various means, mechanisms rand kinstrumentali ties making up the .machine of this invention.

.More detail the Aini/rention has fin `view .the ,provision 'of Aa casing structure which .serves `to Qperativel-y mount serious parts of the mechatherein. The rcasing .structure must be readily assembled and disassembled as occasion demands, and an important phase of the invention is the novel constructional features imparting these properties thereto. It is important that the casing structure be so designed that the machine may be readily manipulated and handled under conditions of practical usage. l Various other more detailed objects and advantages such as arise in connection with the building, design and operation of a stapling machine in accordance with the above noted objectiveswill in part become apparent, and in part be hereinafter stated, as the description of the invention proceeds.

The invention, therefore, comprises a stapling machine including a pair of penetrating anvils pivotally mounted in the lower part of the machine, links rigidly attached to the anvils through the pivotal mounting levers pivotally attached to the links and fulcrumed in the machine upon a sliding plunger having cam tracks in which cams on the said levers extend, a staple feeding plate on the said plunger timed to drive a staple through material upon which the machine is placed and against the anvils after the anvils have moved into clinching position, a handle for operating the said plunger, and suitable staple feeding means,

For a full and more complete understanding reference may be had to the following description and accompanying drawings wherein Figure 1 is a view showing a side elevation of the stapling machine with the head or vertical section shown in section.

Figure 2 is a view showing a front elevation on line 2 2 of Figure 1 with the front plate removed.

Figure 3 is a similar section looking in the opposite direction withthe back plate removed showing the plunger moved downward to the position in which the anvils have been moved to the clinching position, and the plunger is in the position of starting a staple downward.

Figure 4 is a similar view showing the plunger at the extremity of its downward movement in which the ends of the staples are clinched against the anvils.

Figure 5 is a detail illustrating one of the anvils with the link omitted at the end of the shaft thereof.

Referring now to the drawing wherein like reference characters denote corresponding parts, a stapling machine made in accordance with this inve'ition comprises a casing structure for housing which is formed with a vertical section i9 and a supporting leg having a foot l2, as shown in Figure 1, which provides supporting means holding the vertical section perpendicular to the base, or to the lsurface upon which the machine may be used.

The vertical section of the machine is formed with a comparatively open slot or central hole, having a guiding partition i3 in the lower part thereof, and this is provided with a front plate |4 against which staples l5 are resiliently held by a follower I6, with a spring I7 urging it toward the staples.

It will be understood, however, that the staples may be continuously fed or ieldingly held against the plate i by any other means.

Anvils l 8 and I9 are formed with integral shafts and 2| whichare rotatably mounted in the lower end of the partition I3 and provided at their opposite ends with links 22 and 23, which 4 are pivotally connected to levers 24 and 25 through pins 26 and 21, and these are pivotally connected t0 upper links 28 and 29 through pins 3i) and 3| on the inner ends of which rollers 32 and 33 are mounted which extend into cam tracks 34 and 35 in the sliding plunger or slider 36. The opposite ends of the links 28 and 29 are pivotally held on a pin 31, which is stationary, in a front wall 38 of the vertical part of the casing.

The upper end of slider 36 is formed with a slot 39 having ears 40 and 4| at the sides in which an operating lever 42 is pivotally mounted i .againstl the plate 'zontal portions of the cam Aas shown in Figure vward in the staple track so. that the pointsthere- 0n a shaft 43. is a handle 44 by which it is a pin 41.

This end of the lever 42 is pivotally attached to the link 45 through a pin 48, and it will be noted that as the upper end or handle of the lever is moved downward in the direction of the arrow, the connection at the pin 48 will move outward and then slightly inward permitting the shaft 43 to travel downward in a straight or perpendicular line.

On the inner surface of the slider 36 is a plate 49 which, when the slider is moved downward, engages a staple and forceslthe staple downward through layers of material on which the machine is placed and against the inner or clinching surfaces 50 and 5| of the anvils, thereby causing the ends of the staple to assume the clinching positions illustrated in Figure 4.

The anvils may be of any type or design. However, it is preferred to use anvils as illustrated in Figure 5 in which the body portions I8 and I9 are integral with the shafts 2|) and 2|k and their peripheries are described in an arc with the center of the radius corresponding with the center of the shaft. The piercing ends 5'2 lof the anvils are preferably pointed, as shown.

The casing may be fabricated with back and front plates i3 and 38, and end plates 53 and 54, as shown, or may be formed in any manner. The upper portions of the plates I0 and 38 are provided with receiving slots and 56, respectively, to receive the lever 4I as the lever is operated.

While the mode of operation of each of the above described parts will be understood from the foregoing specification, a comprehensive description illustrating theV operation of the machine is hereinafter set forth.

In use the machine may be provided, as shown and described, and with staples resiliently held I4 by a follower, as shown and described, and with the machine placed against the surface of a container, the handle may be moved toward the base and this will actuate the slider or plunger 36 with its associated parts, and as the slider starts downward, it will first draw the rollers 32 and 33 inward along the horitracks 34 and 35 and this motion will cause the links 22 and 23 to move from` the position shown in Figure 2 to their respective dotted positions, shown in Figures Sand 4, and as these links are fiXedly mounted on the shafts 20 and 2|, they will rotate the anvils so that their points will pierce material At the upper end of the lever 42 and at the lower end is a link 45 iixedly attached to ears 45 through vupon which themachine is placed, and continue lto move downward through the material position illustrated in Figure 3.

At this point the plate 49 will engage a staple,

3, and force the staple downto the of will pass through the material, and as the downward action is continued, the ends `:tif 'the t'lple Will'fengage the curved fs'u'rfacs '5U-'arid fandfoll'ow these surfaces farouhd to their' l're- ".pective positions, illustrated in Figure 4, t-liereby-cl-inTclif-ng the ends-of fth'ezst'alples against- -the underisiiifface o -the material. the haindlef-is returned to thev lupper position, the plunger will be drawn lupward and th'earifi-ls will `be Withdrawn through the openings in the material through which they entered.

While preferred specific embodiments of the invention are hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact constructions illustrated and described, because various modifications of these details may be provided in putting the invention into practice within the purview of the appended claims.

What is claimed is:

l. A stapling machine comprising a casing, anvils rotatably mounted in the lower part of the casing and positioned to extend beyond the casing when rotated, arms xedly attached to the anvils extending upward into the casing. means connected to said arms for operative movement thereof to rotate the anvils to operative positions, and means driving staples from the casing against said an 'ls, said anvil rotating means and said staple driving means being operated in the sequence that the anvils pierce the material against which the machine is placed, and the staple driving means thereafter clinches the staples forced through the material and against the anvils.

2.A stapling machine comprising a casing, a staple track in said casing for supporting staples, rotatable anvils positioned at one end of said track and adapted to extend beyond the casing, arms integral with said anvils and extending therefrom, a slider in said casing, means operatively connecting said slider to the arms of the anvils, means on said slider for forcing said staples into grooves formed in the anvils, the actuation of Said slider effecting first the piercing of the material by the anvils and retaining them in a clinching position during the period the staples are forced through the material and against the anvils.

3. A stapling machine comprising a casing, a

lstaple track in said casing, rotatable anvils positioned at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider in said casing having cam tracks therein, rollers extending into said cam tracks, links attached to said rollers and casing, and other links attached to said rollers and said arms for actuating the anvils through said arms.

4. A stapling machine comprising a casing, a staple track in said casing, rotatable anvils positioned at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider having L-shaped cam tracks therein, rollers extending into said cam tracks, links attached to said rollers and casing, other links pivotally attached to said rollers and said arms for actuating the anvils through the arms.

5. A stapling machine comprising a casing, a staple track in said casing, rotatable anvils mounted on fixed axes at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider having cam tracks therein, a series of links pivotally mounted in said casing connected to "tl-fie"l bi tlieiiivs and a toggle arrangement for ,-actuating vthe links through the cam tracks of the slider. v K y Y 6. A stapling machine comprising a casing, a staple track in Lsaid casing, rotatable anvils mounted on fixed axes at one` end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider having cam tracks therein, a series of links pivotally mounted in said casing connected to the arms of the anvils, and rollers on said links extending into said camtracks for operating the levers.

'7. A stapling machine comprising a casing, a staple track in said casing, rotatable anvils mounted on fixed axes at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider having cam tracks therein, a series of links pivotally mounted in said casing connected to the arms of the anvils and constituting a system of toggle members, and rollers positioned at sliding points of said rst links actuated by said cam tracks for operative movement of the links and anvils.

8. A stapling machine comprising a casing, a staple track in said casing, rotatable anvils positioned at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider having cam tracks therein, a set of links pivotally attached to the arms of the anvils, another set of links pivotally mounted on a fixed pin of the casing and 4pivotally connected to said rst mentioned links, and rollers on said last mentioned links extending into the cam tracks of said slider.

9. A stapling machine comprising a casing, a staple track in said casing, rotatable anvils positioned at one end of said track and adapted to extend beyond the casing, arms adapted to rotate said anvils and extending therefrom, a slider in said casing, rst links pivotally attached to the arms of the anvils, second links slidably connecting the first links to a xed point of the casing, and a mechanism including a handle and lever associated with said link system for operative movement of said link system to rotate said anvils.

10. A stapling machine comprising a casing, anvils rotatably mounted in the lower part of the casing and positioned to extend therebeyond when rotated to an operative position, arms xedly attached to the anvils extending upwardly into the casing, staple driving means for clinching a staple against said anvils, said anvil rotating means and said staple driving means being connected by a slider operated by a system of links connected in a toggle arrangement, one set of links being pivotally attached to said anvil arms, and to rollers adapted to move vertically and laterally in cam tracks provided in said slider, a second set of links having one of their ends connected to a stationary pin carried by said casing and their other ends attached to the roller ends of said second set of links, staple feeding means controlled by said slider, and a lever for reciprocating said slider in a plane vertical to the casing, whereby the reciprocation of said slider is translated through said link system to rotate said anvils and clinch a staple thereagainst at the extreme downward movement of the slider.

WERNER SCHAFROTH.

(References on following page) The following refer 7 REFERENCES CITED le of this patent:

UNITED STATES PATENTS Number Name Matveye Matveye ences are of record in the Date Mar. 17, 1931 Sept. 20, 1932 Number 8 Name Date Taylor Aug. 20, 1935 Matveyei May 18, 1937 Maynard Sept. 22, 1936 Schafroth May 18, 1937 Matveyeff Dec. 5, 1939 Maynard Apr. 2, 1940 Schafroth Mar. 11, 1941

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