US2740119A - Stapling machine - Google Patents

Description

April 3, 1956 w. scHAFRoTH STAPLING MACHINE 2 Sheets-Sheet l Filed March 5, 1953 7 2. 7/ W M n G (7 l aw/Ll 7 m fm m I 5 W 5 W mi Jwl MM @F w wmf N5 f W Mm n w 5M April 3, 1956 w. scHAFRoTl-l STAPLING MACHINE 2 Sheets-Sheet 2 Filed March 5, 1953 United States Patent OHice A 2,74,l lg Patented Apr. 3, 1956 STAPLING MACHINE Werner Schafroth, Williamson, Ill. Application March 5, 1953, Serial No. 340,443 6 Claims. (Cl. 1- 49) This invention relates to a stapling machines in general, and particularly those of the type which are used to secure the flaps or ends of closed cartons or containers where stationary anvils cannot be used and where movu able anvils are used for penetrating the material and clinching the staples.

This invention represents a practical improvement over the stapling machines shown in my prior patents, No. 2,080,634 dated March 4, 1941; No. 2,469,054 and No. 2,469,055 dated May 3, 1949; and No. 2,470,727 dated May 17, 1949, in that the movable anvils are secured directly to pivotally mounted handles having knobs or ball handles thereon, and by positively and directly causing said anvils to move instantaneously upon movement of said handles instead of through a series of cams, pins, levers, and links, all of which are subject to wear and breakage. This invention also represents a practical improvement in the maganize which feeds staples one after the other to the staple driving and clinching means.

One of the principal objects of the present invention is to provide a stapling machine which eliminates many of the parts heretofore used in stapling machines, thereby eliminating the wear and breakage which occur in said parts, and which at the same time operates more elli` ciently. f

Another object is to provide a stapling machine wherein any movement of the handles produces a direct and positive movement of the movable anvils regardless of whether the machine is old or new.

Another object. is to provide a stapling vmachine in which a pair of movable anvils is actuated directly by hand in such a manner that the grasping of the handle members with both hands and operation thereof `automatically keeps the stapling machine in proper position on the container or carton being closed during the stapling operation. With prior stapling machines, one hand of the operator was used to cause the anvils to rotate while the other hand was supposed to have been placed in a proper position for preventing the stapling machine from moving or sliding with respect to said carton or container. However, operators sometimes attempt to operate prior machines with only one hand with the result that the machine moves during operation thereby producing an improper fastening means, or damaging the container, or both.

Another object is to provide a stapling machine which is relatively simple and cheap to make, whichcentains less parts which are subject to wear, which requires less repair and replacement parts, ing at all times.

Another object is to provide a stapling machine which can be repaired quickly and easily by the'operator himself, and in which the anvils can be replaced quickly and easily. The present construction allows for quick anvil replacement either because of a broken or Worn anvil or because a different anvil is needed to perform the fastening operation on diierent thicknesses of mateand which is positive act- May 18, 1937; No. 2,234,808 dated" tially rectangular shape with truncated rial, increased numbers of plies, or a change in the kind of material.

These and other objects and advantages will become apparent hereinafter.

The invention is embodied in a stapling machine comprising a novel casing and a novel magazine operatively associated therewith, handles pivotally mounted in said casing and positioned to extend therebeyond, anvils secured to the lower portions of said handles and posi'- tioned to extend below said casing when said handles are pivoted to an operative position, staple driving means operatively connected with respect to said handles and adapted to move downwardly when said handles are pivoted to an operative position. The invention is also embodied in a novel magazine construction which automatically feeds staples to said casing one after the other, said magazine comprising staple-receiving means, a pusher slidably mounted therein, means for forcing said pusher against said staples, and a hold-down bar positioned above said staples.

The invention also consists in the parts and in the arrangement and combination of parts herein described and claimed. In the accompanying drawings, which form part of this specification and wherein like numerals refer to like parts wherever they occur:

Fig. 1 is a perspective view of a stapling machine embodying the present invention, the handles being in their raised or inoperative position,

Fig. 2 is a top plan view of the stapling machine shown in Fig. l,

Fig. 3 is a side elevational view, partly in cross-section, of said stapling machine,

Fig. 4 is an elevational view of the rear face of the front housing after said front housing has been removed from the stapling machine, said handle members being shown in their inoperative position,

Fig. 5 is an elevational view of said front housing showing the parts in their operative position,

Fig. 6 is an elevational View of the front face of the rear housing after the front housing has been removed,

Fig. 7 is a vertical cross-sectional View taken along the line 7*-7 of Fig. 3 showing the rear of the rear housing,

Fig, 8 is a fragmentary enlarged top plan View of the magazine, and

Fig. 9 is an enlarged vertical cross-sectional view of the rear portion of said magazine taken along the line 9-9 of Fig. 2.

Referring now the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises an upstanding casing 1 of substanupper corners 2, although it may be of any suitable shape, and a magazine 3 which extends rearwardly of said casing 1 and automatically feeds staples 4 to said casing 1.

The casing 1 comprises a front housing 5 and a rear housing 6 with stapling means 7 therebetween. The front housing 5 is provided with a peripheral flange 8, spacer pins 9 in the upper portion thereof, a lower marginal spacer bar 10, a central guide pin 11, and two handle pins l2 and 13. The handle pins 12 and 13 provide a pivotal mounting for the handles 14 and 15 whichvare of U-shape cross-section having handle inserts 16 and 17 Y in'the lower portions thereof.

The handle inserts 16 and 17 are held in position by means of insert pins 18 and 19 and the handle pins 12 and 13. Anvils 20 and 21 are secured'to said handles 14 and 1S by means of anvil screws 22 and 23 and anvil pins 24 and 2S. The anvils 20 and 21 are provided with piercing ends 26 and 27 and inner or clinching surfaces 28 and 29.

A driving blade 30 is provided in the plane of and between said anvils 20 and Z1 and is adapted to move vertically upon operation of said handles 14 and 15. The

upper portion of said driving blade is secured to a yoke 31 having bifurcated laterally extending ends 32 and 33 which hold yoke pins 34 and 35 on which links 56 and 37 are pivotally mounted. The lower endsvof the links 36 and 37 are pivotally mounted in said handles 14 and 15 on lower link pins 38 and 39 at a point upwardly from said handle pins 12 and 13 and substantially on a line between said anvils 20 and 21 and said yoke pins 34 and 35 when the parts are in their operating position, The links 36 and 37 are provided with spring pins di? and 41 which hold a rubber band spring d2.

The upper ends of the handles 14 and 15 are provided with ball handles or knobs 43 secured thereto by means of a handle insert 44 having a threaded knob screw 45, said insert 44 being held in position within the U-shaped handles 14 and 15 by handle pins 46.

The rear housing 6 is provided with a peripheral flange 47, spacer pins 48 in the lower portion thereof, two parallel upstanding guides 49 and 5i) for guiding the driving blade 3G during its vertical upward and downward movement, and a U-shaped opening 51 corresponding in shape to the staples 4 which are received from the magazine 3. A smaller central opening 52 is positioned above' and connects with said U-shaped opening 51. As shownin Fig. 6, the guides 49 and 50 are secured to the front face 53 of said rear housing 6 by means of guide pins 54. The rear face 55 of the rear housing 6, as best shown in Fig. 7, is provided with ilanged strengthening members 56 of suitable shape with a tapered bar guide 57 therebetween. The bar guide 57 is provided with guide flanges 5S which are closer at their lower edges and which terminate at the top of said central smaller opening 52. The strengthening members 56 are secured to the rear face by screws 59 or other suitable means. Four removable screws 6i) hold the front housing 5 and the rear housing 6 together with the hereinbefore described stapling parts therebetween. To remove the front housing 5 from the rear housing 6, only the four screws 6i) need be removed.

The magazine 3 comprises a U-shaped outer channel 61 having an inner channel 62 secured therein in parallel relation thereto, said inner channel 62 having an open forward portion which is closed by a wear plate 63 positioned in the plane of the rear housing 6 and flush with the front face 53. ri'he open rear portion of the U-shaped outer channel 61 is closed by an upstanding end plate 64 with a hinge 65 secured thereto. The hinge 65 is provided with an anchor shaft 66 extending therethrough on which are pivotally mounted a hold-down bar 67 and a pusher catch 68 having a rearwardly extending tab 69 and a pair of downwardly extending fingers 7u. The holddown bar 67 is provided with a spring 71 and spring plug 72 for allowing the hold-down bar 67 to be moved horizontally rearwardly for a short distance. The forward portion of the hold-down bar 67 is provided with a notch 73 therein which allows the small end 74 thereof to extend Vward end 74 into alignment-with at which time the spring 71 forces the hold-down bar 67 catch 68 engage the openings 17in the pusher 75 thereby holding said pusher 75 in the rear position until the magazine 3 is filled with staples 4. The hold-down bar 67 is then pivoted downwardly whereupon the forward end, contacts the guide bar 57 whose guide franges 5S guide the forforwardly into the proper position with the small end 74 hush with the front face 53 of the rear housing 6, the upper portion of the forward end abutting against the lower part of the bar guide 57. The ,pusher catch 63 is then rotated upwardly by liftingthe tab 69 and' allowing the pusher 75 to be forced against the rearmost staple 4 by means ofthe rubber band 79. y

The stapling machine is then placed over the carton container to be fastened by grasping the ball handles 43 with both hands which are then 3i) to move downwardly and drive a staple 4 through the material and causing the piercing ends 26 and 27 of the anvils 20 and 21 to pierce the material. Continued movement of the handles causes the clinching surfaces 2S and 29 of the anvils 20 and 21 to engage the lower ends of the staple #i and bend them into the fastening position shown in the Fig. 5. in particular, as the handles 14 and 15 are pivoted about their respective handle pins 12 and 13, the lower link pins 38 and 39 movel outwardly and downwardly thereby causing the yoke 31 and the driving blade 3i) to move downwardly. The driving blade 30 is guided by the` guides 49 and Sil and contacts the upper` surface of a staple 4 which has been forced through the opening 51 in said rear housing 6 by the pusher 75. Continued movement of the handles 14 and 1.5 causes said driving blade 3) to force the staple 4 through the singlev or double thickness of material andcauses `the ends of the anvils 2li and 21 to pierce the material and then rebend the ends of the'staple 4. n The handles 14 and 15 are then brought together with the help of the rubber band spring 42 thereby retracting the anvils from the material, and moving the driving blade 30 upwardly thereby uncovering the opening 51 and allowing the pusher 75 to feed another staple 4 through the opening y51.` The next stapling operation is performed in the saine manner by placing the stapling machine over the material to be fastened and pushing the handles 14 and 15 outwardly and downwardly thereby automatically holding the stapling machine in position throughout the stapling n operation. n

into said small central opening 52 in ush relation to l the front face 53 of the rear housing 6. A pusher 75 is slidably mounted in said magazine 3 and is provided with two upstanding tabs 76 and two smally openings 77 adapted to receive the fingers 70 on said pusher catch 68. The inner channel 62 is provided with a hinge shaft 78 for receiving the end of a feed rubber band 79, the opposite end of which is secured to said pusher 75 preferably by a shaft 8i) held in position by ears 81 struck from the pusher 75 to form the openings 77. A roller. 82 is secured to the forward portion of said inner channel 62 about which said rubber band 79 is rebent. in the outer and inner channel members 61 and 62 for initially receiving said roller s2.

In order to operate the stapling machine, staples 4 Registering holes 83 and $4 are provided I are irst inserted into the magazine 3 by moving the hold' down bar 67 rearwardly against the action of the small in the inoperative position, as shown in Fig. 4, the upward movement of the handles 14 and 15 is limited when the inner edges of said handles abut against the bifurcated ends 32 and 33 of said yoke 31. ln the operative position,

as shown in Fig. 5, the downward movement is limited byV the material and the staple in most instancesand by the` outwardly extending rearward portion of the anvil screws 22 and 7.3 abutting against the top surface of the lower lspace bar l0 in the remaining instances.

With ythis construction, the slightest movement of thc handles 14l and 15 causes an instantaneous and positive movement of the anvils 26 and 21 with great mechanical advantage regardless of whether the parts are new or worn. The anvils 20 and21'are so shaped and positioned on the handles 14 and 15 that they iirst pierce the mate.- rial by niovingsubstantially downwardly and then move toward eachother thereby bending or clinching the end portions of the staples and producing the smallest puncture possible in the material. Because or" the relative K the central hole 52 orl forced outwardly and downwardly. This forces the handles 14 and 15 outwardly and downwardly thereby causing said driving blade positions of the hands of the operator with respect to the anvils and handles, the driving blade, and the links, the operator directly and positively causes said anvils to pierce the material and bend the ends of the staple with great mechanical advantage while at the same time automatically causing said machine to remain in the proper position with respect to the material to be fastened.

This invention is intended to cover all changes and modifications of the example of the invention herein chosen for purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention.

What is claimed is:

1. A stapling machine having a casing, handles mounted in said casing on lixed pivots, anvils fixedly secured to said handles, staple driving means actuated by said handles, whereby said anvilsv pierce the material against which the machine is placed and the staple driving means thereafter clinches the staple which is forced through the material against the anvils.

2. A staplng machine having a casing, handles pivotally mounted in the lower portion of said casing on xed pivots and positioned to extend therebeyond, anvils xedly secured to said handles and positioned to extend below said casing when said handles are pivoted to an operative position, staple driving means operatively connected with respect to said handles for moving downwardly when said handles are pivoted to an operativeposition.

3. A stapling machine having a casing, handles mounted in the lower portion of said casing on fixed pivots and positioned to extend therebeyond, anvils xedly secured t the lower portions of said handles in close proximity to said fixed pivots and positioned to extend below said casing when said handles are pivoted to an operative position, staple driving means adapted to move downwardly when said handles are pivoted to an operative position, said staple driving means being connected to said handles by links.

4. A stapling machine having a casing, handles of U- shaped cross-section pivotally mounted in said casing on xed pivots, anvils secured to said handles and positioned to extend below said casing when said handles are pivoted to an operative position, links having one of their ends pivotally mounted in said handles, the other ends of said links being pivotally mounted in staple driving means, said links being adapted to pivot within the open portions of said handles, said staple driving means being adapted to move downwardly when said handles are pivoted to an operative position.

5. A stapling machine having a casing, handles pivotally mounted in the lower portion of said casing on lxed pivots and positioned to extend therebeyond, anvils securedto the lower portions of said handles and positioned to extend below said casing when said handles are pivoted to an operative position, staple driving means adapted to move downwardly in the plane of and between said anvils when said handles are pivoted to an operative position, links pivotally connected to the upper portion of said staple driving means, the lower portions of said links being pivotally connected to said handles.

6. In a stapling machine, a casing having handles therein of U-shaped cross-section pivotally mounted in the lower portion thereof and positioned to extend therebeyond, anvils secured directly to said handles and positioned to extend below said casing when said handles are pivoted to an operative position, links having one of their ends pivotally mounted in said handles, the other ends of said links being pivotally mounted in staple driving means, said links being adapted to pivot within the open portions-of said handles, said staple driving means being adapted to move downwardly when said handles are pivoted to an operative position, and a magazine adapted to feed staples to said staple driving means.

References Cited in the tile of this patent UNITED STATES PATENTS 288,191 Young et al. Nov. 6, 1883 547,756 Kline Oct. 8, 1895 2,055,257 Maynard et al Sept. 22, 1936 2,080,634 Schafroth May 18, 1937 2,195,889 Maynard Apr. 2, 1940 2,298,123 Harred Oct. 6, 1942 2,312,142 Abrams et al. Feb. 23, 1943 2,357,737 Harred Sept. 5, 1944 2,420,830 Maynard May 20, 1947 2,445,180 Maynard July 13, 1948 2,469,055 Schafroth May 3, 1949 2,624,878 Marano Jan. 13, 1953

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