US2670468A - Stapling machine - Google Patents

Description

March 2, 1954 H w, MARANQ 2,670,468

' STAPLING MACHINE Filed Jan. 8, 1955 Patented Mar. 2, 1954 y UNITED STATES PATENT 0 F FICE i STAPLI'NG MACHINE U Herbert W. Marano, Brooklyn, N. Y., assigner to Wilsonflones Company, Chicago, Ill., .a corporation .of Massachusetts Application January 8, 1953, 'Serial No. 330,337 l The present :invention relates to .staple drivers, and in particular to .staple .drivers .comprising a base, an upper cover member including a driving ram .and an interpositioned lower member constituting ,a staple magazine. lThe present invention is a oontinuation-in-zpart of the invention disclosed and claimed .in .my copending .application Serial No. 158,462, filed April 27 19.5.0., now Patent No. 2,624,878, issued .January 13, 19.5.2, .and relates specifically to the means for releasably securing the magazine to the cover .and driving ram assembly. lThe l.particular Vdetails of vthe staple driving `.operation .are not .important to an -understand-ing of the present invention, and these will be detailed inthe ccpendin-g case,

In previous devices of this general construction, in order to provide a reasonably good engagement between the magazine and cover., it was Vnecessary to nianufacture and assemble the parts to close tolerances. This, of course, .made .assembly .a relatively slow process and :greatly increased the costei manufact-ure of the device.. 'heymain .object of the present invention, therefore, :is the provision o1" an interengagement between the magazine :and cover which may be achieved easily and simpl-y, using parts with relatively -w-ide tolerances, thereby to increase assembly and reduce the cvereall cost .of the device, while retaining all the necessary `operational functions, as ready relative displacement of the cover and `1m,ag-azine., e

The present invention is characterized by the use of reverselfv lbent spring :legs depend-ing from the underside of the cover interengaszng the iorwardly bent edges of the iront wall of the 'magazine. The depending spr-ing fingers arcvery easiltT displacable to permitsame to ride ever the iront wall of the magazine during engagement and dis.. engagement of thecover and magazine.

In the drawings annexed hereto, and forming a pant hereof,

Figure 1 is a side elevational View or one form of staple driving device embodying the improvement of the present invention, with a portion thereof broken away and sectioned;

Figure 2 is an enlargedffront `elevational view of the magazine and cover assembly, with the cover sectioned to reveal structural details;

Figure 3 is an enlarged side elevational view of the front of the cover and magazine assembly with the cover sectioned to reveal structural details; and

Figure 4 is a section on the line 4-4 of Figure 3.

The normally horizontally extended base I0, a channel-shape staple magazine assembly l2 open at the top thereof, and a cover I4 of inverted channel-shape are all pivotally pinned together at the rear thereof, as indicated by reference numeral lit. A pair loi spaced apart standards are mounted atop lbase le between which the staple magazine 12, the lower member, and -cover I4, the upper member, are pivotally disposed, Cover 1I-4 is provided -with a depending skirt ,i8 along the sides and iront. AOn .the underside of the cover, there is secured as by rivets 2t, 2li a driving member 22 of ila-t spring steel, having an integral downwardly projecting staple driving component 2t at the forward end thereof, A cover guide 2t is provided comprising an inverted channel shaped stamping pivoted with cover I4 at 'I6 and having a forwardly extended T-tongue 28 projecting through a rectangular opening 30 in driving blade 24. Spring `means `(not shown.) are provided within vcover lll normally to .urge guide 2li dow wardly from cover .lll into the relation `shown ,in Figures 2 and 3.

Between drive .member 22 and the underside of cover i4, there is disposed a flat member of spring metal 32 having a bifurcated, downwardly angled .component 34 at the front thereof, dehning .spring legs .3.5, .3S between ram blade 24 and the front .skirt it. The terminals of legs 3.5, 3.6 are reversely and rearwardly bent, as at 38.

Magazine .l2 is'generaliy U-shaped, open at the top, and is provided with a front wall d extended above the level of .the side walls 42 thereof, said front wall being provided at its upper end with a pair of .forwardly curved lips 4,4 Aspaced ,apart thesame distance as legs 3 6, .35 and bends 38, 3,8.

.As will be readily understood, magazine l2 comprises the usual staple receptacle and means therein to urge the staples toward .the front thereof, at which point the staples are driven downwardly against .base lll when cover le is `depressed and blade 24 driven downwardly against the rear face of magazine iront wall itl). Normally, it is desirable that magazine l2 and vcover I4 swing as a unit about pivot I6. However, it becomes necessa'r'yto obtain .access to the interior of magazine l2 to load staples thereunto, andthe cover and magazine must be separated.

'The cover andmagazine are shown in Figures 2*, 3 and 4 .engaged for movement simultaneously with respect to base 'I D., Forwardly bent lips 4,4, :i4 extend over the ends of reverse bends 38, 38. During operation of the device, when cover I4 is manually depressed against base Il! bearing magazine I2 along with it, cover lll moves downwardly with respect to said magazine and legs 36, 36 ride downwardly along the outer i ace of magazine wall 40 until driver blade 24 ejects the staple in line with it. As pressure is released on the cover, it will first rise with respect to magazine l2 until bends 38, 38 bear against and engage lips M, M whereupon the magazine will then be borne along with the cover.

When it is desired to separate the cover from the magazine to expose the interior of the latter, the sides of the magazine near the front thereof are held in one hand, while the cover is grasped in the other hand and simply pulled apart, with the bends 38, 38 riding over and free of lips 44, 4I. Due to the springiness of bends 38, 38 and their associated legs, it is obvious that no great tolerances are required, and that even a slop t will nevertheless be effective for all practical purposes.

The parts of my device need not be'machined, but may be stamped easily and quickly, and relatively inexpensively. With suitably spaced guide apertures for the Ariveting 28, the cover, driver, guide and spring may be assembled very easily and even by relatively unskilled labor. The features of the present invention are the forwardly arched lips 44 at the top of the front wall of the magazine and the cooperating spring legs 36 which are rearwardly biased (seen Figures l and 3) in combination with the reverse bends 38, 38 at the ends thereof.

Having now described my invention, what I claim and desire to secure by Letters Patent are: 1. In a stapling machine comprising a base, an upper cover member of inverted channel shape and a staple driver blade projecting downwardly therefrom at the front end thereof and spaced from said front end, with the rear end of the upper member being pivotally supported on the rear of the base, a lower member of channel shape open at the top and forming a, magazine for staples, the rear end of the lower member being pivotally supported at the rear end of the upper member, a driver guide between the upper and lower members interengaged with the upper member to pivot therewith, the cover and the guide being manually separable from the lower member substantially simultaneously to expose the interior of said lower member, and releasable spring means depending from the underside of the upper member 'between the front thereof and the driver blade yieldably to engage and retain therewith the lower member.

2. In a stapling machine comprising a base, an upper cover member of inverted channel shape and a staple driver blade projecting downwardly therefrom at the front end thereof and spaced from said front end, with the rear end of the upper member being pivotally supported on the rear of the base, a lower member of channel shape and having an upstanding front wall, said lower member being open at the top and forming a magazine for staples, the rear end of the lower member being pivotally supported at the rear end of the upper member, a driver guide between the upper and lower members interengaged with the upper member to pivot therewith, the cover and the guide being manually separable from the lower member substantially simultaneously to expose the interior of said lower member and releasable spring means depending from the under- 4 side of the upper member between the front thereof and the driver blade, said spring means terminating in a reverse bend yieldably to engage the front wall of the lower member and retain therewith the said lower member.

3. In a stapling machine comprising a base, au upper cover member of inverted channel shape and a staple driver blade projecting downwardly therefrom at the front endv thereof and spaced from said front end, with the rear end of the upper member being pivotally supported on the rear of the base, a lower member of channel shape having an upstanding front wall terminating in forwardly curved portions, said lower member being open at the top and forming a magazine for staples, the rear end of the lower member being pivotally supported at the rear end of the upper member, a, driver guide between the upper and lower members interengaged with the upper member to pivot therewith, the cover and the guide being manually separable from the lower member substantially simultaneously to expose the interior of said lower member and releasable spring means depending downwardly and rearwardly from the underside of the upper member between the front thereof and the driver blade, said spring being bifurcated at its lower end, the bifurcations terminating in reverse bends yieldably to engage the portions of the front wall of the lower member and retain therewith the said lower member.

4. In a stapling machine comprising a, base, an upper cover member, and an intermediately disposed lower member, a staple driving blade projecting downwardly from the upper cover member at the front end thereof and spaced rearwardly of said front end, the rear end of said upper member being pivotally supported on the rear of the base, the lower member forming a magazine for staples, the rear end of said lower member being pivotally supported at the rear end of the base on a common pivot with the upper member, the lower member having a front wall the top of which extends forwardly of the lower member, the front end of the cover being manually separable from the front end of the lower member to expose the magazine, and releasable spring means depending from the underside of the upper member yieldably to engage the front wall extension of the lower member.

5. In a stapling machine as in claim 4, wherein the releasable spring means depend from the upper member between the driver blade and the front end of said cover member.

6. In a stapling machine as in claim 5, wherein the end of the releasable spring means is rearwardly extended.

HERBERT W. MARANO.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,603,781 Ruskin July 22, 1952 FOREIGN PATENTS Number Country Date 587,132 GreatBritain Apr. 15, 1947

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