US2150127A - Stapling machine - Google Patents

Description

March 7, 1939. G. c. PASSEK 2,150,127

STAPLINGJMACHINE Filed Feb. 24, 1938 2 Sheets-Sheet, 2

aw 171W v f zmsvzfoz" fieozye CPasseZ Patented Mar. 7, 1939 UNITED STATES 2,150,127 STAPLING MACHINE George C. Passek, Springfield, Pa., assignor to Alfred J. Paynt'er, Philadelphia, Pa.

Application February 24, 1938, Serial No. 192,304 I 5 Claims. (Cl. 1-49) This invention relates to improvements in stapling machines wherein instrumentalities are employed for driving the legs of a staple into or through the wall or walls of a packing box or other article, and for bending the staple legs toward each other inwardly of the outer surface of such box or article to fasten the staple therein, such instrumentalities operating and performing their functions wholly on one side of such. box or article or exteriorly thereof.

The object of the invention is to provide a novel-and advantageous means whereby the legs of a staple, as they are driven into or. through the wall or walls of a box or other article, are directed toward each other and caused to assume a curved condition in the plane through which the staple as a whole is driven, thereby fastening the staple within such wall or walls.

The invention resides in the novel construction, combination and arrangement of the elements of the machine as will be hereinafter described and claimed.

In the accompanying drawings, illustrating the invention,

Figure 1 is a central, longitudinal section of my improved machine, on line i--l of Fig.2.

Figure 2 is a vertical section through the forward part of the machine, on line 2--2 of Fig. 1.

Figure 3 is a sectional detail, enlarged, on line 3-3 of Fig. 1.

Figure! is a sectional detail, enlarged, on line l-l of Fig. 1. v

Figure 5 is an enlarged view of the lower portion of Fig. 2, showing the forming member in full view, and showing two layers of material beneath the machine to receive a staple therefrom.

Figure 6 is a vertical section, on line 66 of Fig. 5.

Figures '7 and 8 are views similar to Figs. 5 and 6 respectively, showing advanced positions of the parts during a staple driving operation.

Figures 9 and 10 are views similar to Figs. 5 and 6 respectively, showing the positions of the parts at the completion of a staple driving operation.

Figure 11 is a front view of one of the staples.

Figure 12 is a side view of one of the staples.

Referring to the drawings, 5 designates the machine frame having a horizontally-extending lower portion 1 and a vertically-extending for-- ward portion 8 rising from the forward end of the lower portion.

'The lower portion 1 of the frame is hollow and it has a floor plate 9 secured thereto and prostaple guide for receiving and guiding a row of staples ll.

Slidable in the forward end portion of the staple guide I0 is the rearward extension I2 of a forming member 13 having an inclined forward end surface ll, producing a nose-like forward end portion for the member. This nose-like end portion of the member l3 rests normally within a hollow nose-like projection I formed on a plate l6 which is secured to the frame 5 and constitutes the forward wall thereof.

The forming member I3 is urged forwardly and its, forward end is pressed normally against the frame plate I6 by a helical spring I! which encircles a rod l6 having its forward end secured to 15 the forming member l3 and its rearward end portion extending slidably through a block l9 secured .upon the floor plate 9. The spring I! hasits forward end engaged with the extension l2 of the member [3, and its rearward end engaged with the block i9.

The row of staples II is fed forwardly by a suitable follower 26 which embraces the staple guide 10 andi's slidable thereon. The follower has an arm 2| which extends upwardly through a longitudinal slot in the top wall of the lower portion 1 of the frame 5. The arm 2| is connected to one end of a spiral spring 22 which surrounds a pinor shaft 23 and has its other end secured thereto. The pin or shaft-23 extends between and has its ends mounted in openings in the side walls of the forward portion. 8 0f the frame 5 in a suitable manner to prevent rotation of the pin or shaft. The spring 22 tends to wind itself around the shaft 23 and thereby urges the follower 20 and the row of staples Ii engaged thereby forwardly and presses theforemost staple of the row of staples against the frame plate 24. The foremost staple 24 embraces the nose-like forward end portion of the forming member l3 and its legs 25 occupy positions within oppositely disposed channels 26, 26 on the respective sides of the forming member I3. These channels 26, 26 have parallel guiding walls 21, 21 opposite to the respective sides of the member l3 and spaced therefrom for the reception of the staple legs 25, 25 between them. The forward walls of the channels 26, 26 are formed by the frameplate l6, and the forward surface of the staple nextadjacent to the foremost staple 24 constitutes rearward walls for the channels.

Slidably mounted in the forward portion 8 of the frame 5' above and in alinement with ,the foremost staple 24 is a staple driving 'platenza constructed and arranged to drive the foremo st in'g walls 21, 21 of the channels 26,26; and the' staple 24 downwardly through and discharge it from an' opening 29 in the bottom of the machine frame. o

The staple driver 26 has a bracket 36 secured thereto and pivoted to the lower ends of a pair of parallel links 3| whose upper ends are pivoted-to 32 are maintained normally elevated by the action of a helical spring 36 acting between a bracket 31 secured to the machine frame and a pin 36 connecting the links of the pair 3|. The spring 36 encircles a pin 39 which extends from the pin 36 and is fitted to slide through an opening in the bracket 31 when the arm 32 is lowered against the action of the spring 36 in a staple driving operation. After the staple driving operation, the spring 36 acts to elevate the arm 32 to its normal position. i

Deflecting parts .46, 46 for deflecting the staple legs are provided at the lower or delivery ends of the guiding channels 26, 26. The deflecting parts 26, 26 have downwardly and inwardly directed, curved, deflecting surfaces 4|,. 4| which form, in effect, continuations of the parallel guidparts 46,46 extend ,below the bottom of the forming member l3 and they are directed toward each other with their curved deflecting surfaces 4|, 4| extending below and spaced from corners or obstructions 42, 42 formed by the member l3 at the junctions of the bottom surface and the side surfaces thereof.

The parallel guiding walls 21, 21 of the channels 26, 26 and the deflecting parts 46, 46 for the staple legs 26, 26 are formed by parallel plates 43, 43 which are vertically adjustable in the machine to raise 'or lower the deflecting parts 46, 46 with relation tothe bottom corners 42, 42, for a purpose presently appearing. The plates 43,. are secured in place in different positions of adjustment by shoulderedscrews 46 which extend through the frame plate l6 and through slots in the plates 43, 43 and secure the plates, to the machine frame.

The operation of the machine is as follows:

The machine is placed over the work to be stapled with the bottom surface of the machine in contact with the work, and with the frame opening 29 over the part of the work which is to receive the staple.

The operating arm 32 is-then depressed or forced downwardly against the action of the spring 36, thereby forcing the staple driver 26 downwardly and causing it to engage the top of the crown of the foremost staple 24- of the row II and drive it downwardly and discharge it through the opening 26 in the bottom of the machine frame.

During the downward movement of the staple 24, it is guided by the channels 26, 26 through which the staple legs 26, 26 move. While the staple 24 is being driven downwardly, its crown engages the forward inclined surface H of the forming member I3 and moves the member rearwardly against the action of the spring I! and between the staple legs 26, 26 until the member |3 has been moved completely out of the path of the staple crown, as the crown passes the lower end of the inclined surface l4; and, while the staple 24 is thus being driven downwardly, the lower ends of the staple legs 26, 26 encounter the curved surfaces 4|, 4| of the deflector parts 46, 46 and are forced between such surfaces and the opposing parts or corners 42, 42 of the forming member l3. As the staple legs 26, 26 are thus forced through the spaces between the surfaces 4|, 4| and corners 42, 42, the pressure of the outer surfaces of the staple legs 26, 26 against the channel walls 21, 21 above the corners or obstructions 42, 42 and the pressure of the outer surfaces of the staple legs against the curved surfaces 4|, 4| below the corners or obstructions 42, 42 causes the inner surfaces of the staple legs to press hard against the corners 42, 42, and this pressure, coupled with the friction produced by the engagement of the staple legs with the corners, curves the staple legs and directs them inwardly or toward each other within the material 44 of the work or article into which the staple is driven, as clearly shown in Figs. 7, 6, 9 and 10. v

After a staple has been driven, as just described, the downward pressure on the handle 32 is removed and the spring 36 raises the handle and staple driver 26 to normal position; and, as the staple driver clears the forming member l3 and the row of staples II, the spring II moves the forming member forwardly to its normal position, and the spring 22 advances the row of stapies I, and moves the foremoststaple of the row into position beneath the staple driver 26 for a succeeding staple driving operation.

In Figs. to 10, inclusive, I have shown two layers of the material 44 into which the staple is driven. 'I'hese layers may constitute meeting parts of a closure for a box or carton into which the staple is driven to secure such parts together; and it will thus be seen that such parts may be secured by a staple or staples driven into the same by instrumentalities which operate and perform their functions wholly on the outside of the box or carton.

.The curvature of the metal of the staple conbeing somewhat less than the normal width of" the staple before 'being driven; and this inward bending of the staple legs during the completion of the staple driving movement tends to raise the curved staple legs toward the staple crown and more firmly clamp between them the material into which the staple is driven.

By setting the plates 43, 43 in different positions of vertical adjustment the deflecting parts 46, 46 may be placed closer to or farther from the corners 42, 42- of the forming member |3 the curvature of the legs of the driven staple may be varied, the positioning of the parts 46, 46 closer to the corners '42, 42eilecting a greater curving of the staple legs and setting the legs of the driven staple in closer relation to the staple crown; and the positioning of the parts 46, 46 farther from the corners 42, 42 effecting a lesser curving of the staple legs and setting the legs of a driven staple in a more spaced relation to the staple crown. Thus it willbe understood that the machine may be adjusted to accommodate work of difierent thicknesses between the legs and crown of a driven staple.

I claim:

1. The combination of a frame having parts providing spaced, oppositely disposed channels for receiving and guiding the legs of a staple, a staple driver operable to drive a staple guided by said channels, a forming member having corner portions and movable between the legs of a staple driven by said driver and into the path of the'staple crown, said channels having parallel guiding walls opposite to the respective sides of the forming member, and deflecting parts directed towardeach other adjacent to said guiding walls at the delivery ends of said channels for cooperation with said walls outwardly of the staple legs and with said corners inwardly of the staple legs for curving said legs and directing them toward each other as they are driven through said channels and between said corners and said deflecting parts.

2. The combination of a frame having parts providing spaced, oppositely disposed channels for receiving and guiding the legs of a staple, a staple driver operable to drive a staple guided by said channels, a forming member movable between the legs of a staple driven by said driver and from and into the path of the staple crown and having an inclined surface to be engaged by the staple crown to move the forming member from its normal position, said channels having parallel guiding walls opposite to the respective sides of the forming member, and deflecting parts directed toward each other adjacent to said guiding walls at the delivery ends of said channels for cooperation with said walls outwardly of the staple legs and with parts of said forming member inwardly of the staple legs for curving said legs and directing them toward each other as they are driven through said channels and between said deflecting parts and said forming member.

3. The combination of a frame having parts providing spaced, oppositely disposed channels for receiving and guiding the legs of a staple, a staple driver operable to drive a staple guided by said channels, a forming member having corner portions and movable between the legs of a staple driven by said driver and from and into the path of the staple crown and having an inclined surface to be engaged by the staple crown to move the forming member from its normal position, said channels having parallel guiding walls opposite to the respective sides of the forming member, and deflecting partsdirected toward each other adjacent to said guiding walls at the delivery ends of said channels for coopby said channels, a forming member movable between the legs of a staple driven by said driver and from and into the path of the staple crown,

said channels having parallel guiding walls opposite to the respective sides of the forming member, and deflecting parts directed toward each other adjacent to said guiding walls atthe delivery ends of said channels for cooperation with said walls outwardly of the staple legs and with parts of said forming member inwardly of the staple legs for curving-said legs and directing them toward each other as they are driven through said channels and between said deflecting parts and said forming member.

5.The combination of -a frame having parts providing spaced, oppositely disposed channels for receiving and guiding the legs of a staple, a staple driver operable to drive a staple guided by said channels", a forming member-having side obstructions for engagement by the inner surfaces of the legs of a staple for curving the same, said member being movable between the legs of a staple from and into the path of the staple crown, said channels having guiding walls opposite to the respective sides of said member above the plane of said obstructions for engagement with the outer surfaces of the legs of a staple, and deflecting parts below the plane of said ohstructions and directed toward each other adjacent to said guiding walls at the delivery ends of said channels for engagement with the outer surfaces of the legs of a staple, said guiding walls cooperating with said obstructions above the plane thereof, and said deflecting parts cooperating with said obstructions below the plane thereof for curvingsaid legs and directing them toward each other as they are driven through said channels and between said member and said uiding walls and deflecting parts.

GEORGE c. PASSEK.

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